To see the other types of publications on this topic, follow the link: Detention basin.
Dissertations / Theses on the topic 'Detention basin'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 36 dissertations / theses for your research on the topic 'Detention basin.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Watkins, Edwin W. "Extended stormwater detention basin design for pollutant removal." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-08042009-040522/.
Full text
2
Huggins, Cole Patrick. "Performance of a Retrofit Detention Basin in Fargo, ND." Thesis, North Dakota State University, 2019. https://hdl.handle.net/10365/31576.
Full textAbstract:
?The Fargo Project? located in Fargo, North Dakota, is an 18-acre stormwater detention basin that was retrofitted in 2015 to include an earthen-channel, sediment forebay, and various native vegetation within the floodplain and channels. Goals of this study were to assess how the post-retrofit earthen-channel performs relative to the pre-retrofit concrete-channel in terms of conveyance of small storms, and to estimate infiltration and evaporation from the post-retrofit detention basin during various storm sizes and intensities. Results showed that although channel roughness ultimately increased in the post-retrofit basin and allowed for greater instances of flooding for one channel, erosion of the main channel, with a larger urbanized contributing area, resulted in behavior similar to that of the pre-retrofit main channel for small storms. Modeled infiltration and evaporation showed total abstraction ranging between 2.9% and 11.7% of the maximum ponded volume for various storm sizes and intensities.
3
Smiley, Mark Andrew. "Hydrologic modeling for flood control detention basin design and operation." Diss., The University of Arizona, 1994. http://hdl.handle.net/10150/186722.
Full textAbstract:
This dissertation presents a methodology for hydrologic modeling related to the design and operation of flood control detention basins. Prior to this document, a comprehensive, tractable methodology for detention basin hydrologic modeling did not exist. Furthermore, techniques used in the past have not always taken advantage of computer technology or recent advances in the field of hydrology. New and original methods are presented and are developed from personal experience, recent literature, and relevant courses at The University of Arizona. Chapters in this document include precipitation data analysis, detention basin stormwater inflow, detention basin sediment inflow, stored water losses through evaporation and infiltration, design issues, and operation under competing water use objectives. Engineering constraints and data availability are explicitly addressed throughout the methodology. The goal is to determine hydrologic variables for detention basin design such as active storage volume, spillway capacity, drain outlet capacity, and, additionally for some systems, the bypass channel capacity and side-weir threshold spill flow rate. In addition to providing an increased level of protection from flood damage, detention basins may also accommodate land use and water conservation objectives of urban society.
4
REMBELSKI, MARA KATHLEEN. "URBAN STORMWATER HARVESTING: IMPLICATIONS AND STRATEGIES FOR DETENTION BASIN SOILS." Thesis, The University of Arizona, 2016. http://hdl.handle.net/10150/618750.
Full textAbstract:
As the Southwest continues to be impacted by increasing drought stress under changing
climate conditions, innovative water-harvesting strategies will become a necessary dimension of
sustainable water use. The University of Arizona campus has been incorporating waterharvesting
regimes within its urban landscape for over 20 years. This project explores the
physical and geochemical consequences for the surface soils exposed to high volumes of
stormwater discharge and contaminants found in urban runoff. Soil samples were collected from
four different basin sites across the UA campus. These samples were analyzed and compared
using x-ray diffraction, x-ray fluorescence, particle size analysis, and various basic chemical
analyses. The samples were found to vary significantly by their relative type (basin vs. control)
based on pH, LOI, and several geochemical datasets. Soils were most often significantly
different relative to their specific site for geochemical and mineralogical data. Data suggest that
basin properties are most dependent on the age of the basin and the type of runoff received.
Observations also suggest the necessity for soil amendment to improve water and soil quality at
these sites. The application of biochar at the surface of these basins has been studied for the
improvement of local water collection basins.
5
Green, Jena M. "The effects of a detention basin on localized ground-water flux." abstract and full text PDF (free order & download UNR users only), 2005. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1433294.
Full text
6
Kron, Darrin. "Toxicity assessment of a pilot-scale stormwater wet detention basin in the Lincoln Creek Watershed, Milwaukee, Wisconsin /." View abstract (PDF format), 2002. http://epapers.uwsp.edu/abstracts/2002/Kron.pdf.
Full text
7
Zhu, Xiaoxiao. "Influence of hydrodynamics and correlation of metal contents with settling velocities on contamination distribution in a stormwater detention basin." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEI035.
Full textAbstract:
Les bassins de retenue-décantation ont trois fonctions principales : stocker les eaux pluviales pour éviter les inondations, favoriser la décantation des polluants particulaires, éviter la remise en suspension et la remobilisation des polluants décantés vers l’aval. La conception et la gestion de telles installations nécessitent de connaître les caractéristiques hydrodynamiques, celles des sédiments et de pouvoir prédire les zones où les dépôts sont fortement contaminés. L’objectif principal de la thèse est d’identifier les zones où les teneurs en polluants sont élevées au niveau des sédiments des bassins de retenue-décantation. Le site d’étude est le bassin de rétention des eaux pluviales de Django Reinhardt (BDR), qui est un bassin sec à l’exutoire d’un bassin versant industriel. Ce bassin a fait l’objet de plusieurs études dans le cadre de de l'Observatoire de Terrain en Hydrologie Urbaine (OTHU).Dans un premier temps, les mesures de vitesses de surface par LSPIV (Large-Scale Particle Image Velocimetry) ont permis de mieux comprendre l’hydrodynamique au sein de l’ouvrage. Ces mesures ont été exploitées pour évaluer les modèles CFD (Computational Fluid Dynamics). C’est la première fois que cette technique de mesure est appliquée au cas des ouvrages de gestion des eaux pluviales. Les résultats montrent que les modèles CFD identifient la principale zone de recirculation qui favorise la décantation. Ces modèles évalués ont ensuite été employés pour simuler le transport de polluants particulaires, leur sédimentation et leur remise en suspension. L’exploitation des résultats de ces simulations a permis d’indiquer les points où les sédiments sont remis en suspension et transférés vers le bassin d’infiltration à l’aval et de prédire les zones d’accumulation en métaux. Les résultats obtenus montrent également que les teneurs en fer dans les sédiments sont fortement corrélées aux vitesses de chute. Le fer pourrait être un bon indicateur du niveau de contamination des sédiments en certains métaux lourds. Les résultats de cette thèse contribuent à améliorer les règles de conception des bassins de retenue-décantation des eaux pluviales et les stratégies de gestion des sédiments associés<br>Stormwater detention basins have three main functions: storing rainwater to prevent flooding, promoting settling of particulate pollutants, avoiding resuspension and remobilization of settled pollutants to the downstream. The design and the management of such facilities requires the knowledge of hydrodynamic and sediment characteristics, as well as the ability to predict areas where deposits are highly contaminated.The main objective of this PhD work is to identify the areas where pollutant levels in sediments are high in detention and settling basin. The studied site is the stormwater detention basin (Django Reinhardt basin or DRB), which is an extended and dry basin at the outlet of an industrial watershed. This basin has been the subject of numerous investigations within the framework of the Field Observatory for Urban Water Management (or observatoire de terrain en hydrologie urbaine - OTHU in French).First of all, the measurements of surface velocities by Large-Scale Particle Image Velocimetry (LSPIV) permits to better understand the hydrodynamic behaviour in the basin. These measurements were used to evaluate CFD (Computational Fluid Dynamics) models. This is the first time this measurement technique has been applied in the case of stormwater management facilities. The results show that CFD models identify the main recirculation zone that promotes settling. These evaluated models were then used to simulate the transport of particulate pollutants, including sedimentation and resuspension. The exploitation of these simulations results enables to (i) identify the preferential areas where resuspended contaminated sediments may be conveyed to the downstream infiltration basin and (ii) predict the accumulation zones of some metals. Results also demonstrate that iron contents in sediments are strongly correlated to settling velocities and can be considered as a good indicator of the level of heavy metals contamination of sediments. The results obtained in this thesis contribute to improve the design of stormwater detention and settling basins and the management of contaminated sediments
8
Dablemont, Todd Wayne. "The effectiveness of the Natural Resource Conservation Service (NRCS) and Huff rainfall distribution methods for use in detention basin design." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2010. http://scholarsmine.mst.edu/thesis/pdf/Dablemont_09007dcc8078b285.pdf.
Full textAbstract:
Thesis (M.S.)--Missouri University of Science and Technology, 2010.<br>Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed April 8, 2010) Includes bibliographical references (p. 59-60).
9
Wolter, Matthias. "Regional Stormwater Management Facility System at the School of Veterinary Medicine, Blacksburg, Virginia." Master's thesis, Virginia Tech, 1996. http://hdl.handle.net/10919/30556.
Full textAbstract:
Continuing development of the Virginia Tech campus is increasing downstream flooding and water quality problems. To address these problems, the University has proposed the construction of a stormwater management facility to control the quantity and quality of stormwater releases to Strouble Creek, a tributary of the New River.
The overall goal of this project is to design a stormwater management facility proposed for the Virginia-Maryland College of Veterinary Medicine at Virginia Tech in Blacksburg, Virginia that will reduce present and anticipated downstream flooding and water quality problems.
Specific objectives of the project are:
* control of flooding in lower areas by reducing the peak discharge while disturbing existing wetlands as little as possible,
* address removal of major NPS pollutants such as total phosphorus (TP), total nitrogen (TN), metals, organic compounds related to petroleum and gasoline, and suspended sediment (SS) from stormwater runoff, and
* design of a dam system that is able to withstand all driving forces and constructed in accordance with governing regulations.
The design requirement to limit wetland disturbance below one acre was maintained. The requirement set by officials of Virginia Tech is based on the Nationwide Permit 26 of the Wetland Regulations. An individual permit process is thus avoided. Considering this demand, however, the freedom of the stormwater management facility design was significantly restricted. Resulting from the previous restrictions mentioned, the facility will include two ponds in series - a lower, dry pond and an upper, wet pond. The stormwater management system is designed to reduce the peak discharge. The dry pond is designed to detain water only for a short period of time, as opposed to the wet pond which is designed to retain water, thereby maintaining a permanent pool of water, and to change the characteristics of runoff.
The wet pond was chosen to be of an Extended Detention wetland type. Aspects such as the availability of suitable area and detention volume governed the decision to make use of this type of stormwater wetland. The constraint on a maximum possible water surface elevation due to the Veterinary School1s road embankment, which crest elevation is at 2023 ft, was considered in the design.
The stormwater management facility was designed to meet water quantity control requirements and to address water quality benefits. Storm water management regulations intending to mitigate the adverse effects of land development to streams and waterways were met. Requirements to limit peak discharges from 2-year and 10-year events to existing discharge levels were achieved.
Several outlet structures for each of the ponds were investigated. The structures proposed are a perforated riser/broad-crested weir for the wet pond and a proportional weir for the dry pond. They were chosen as a result of analyses on hydraulic performance, maximum water surface elevations, drawdown times, peak discharge rates, and pollutant removal capabilities.
The average pollutant removal capability of 75% of TSS, 45% TP, and 25% TN for an extended stormwater wetland, as found in the literature, is expected to be lower for the proposed facility, since the wetland-to-watershed-area ratio is considerably smaller (0.22%) than the required minimum ratio of 1%. However, other suggested desirable parameter for extended detention wetland systems such as required treatment volume, effective flow path length, and dry weather water balance will be maintained.
The structural design of the dams was based on experience and research data. The dams are designed to consist of two zones, shell and core. The core extends as a cutoff trench 4 feet below the ground surface. Additionally, toe drain trenches and anti-seep collars along the pipe where penetrating the dam will be placed to collect and reduce seepage, respectively. Special considerations toward seepage problems were taken into account for both dams by placing a cutoff trench and a toe drain trench.
Note: The appendix of this project report contains four AutoCAD files, that can only be viewed using AutoCAD.<br>Master of Engineering
10
Nakazone, Lucia Midori. "Implantação de reservatórios de detenção em conjuntos habitacionais: a experiência da CDHU." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/3/3147/tde-13042006-210759/.
Full textAbstract:
Novas medidas de controle das vazões excedentes surgiram nos últimos anos e buscam contornar as mudanças nos ciclos hidrológicos, imitando e mantendo as condições naturais existentes antes dos processos de urbanização. Uma dessas alternativas, conhecida genericamente pelo nome de reservatório de armazenamento, procura reter parte do escoamento superficial gerado durante as precipitações, para depois fazer sua devolução de forma lenta e gradual aos leitos dos córregos e rios, atenuando o pico dos hidrogramas e redistribuindo as vazões ao longo do tempo. Uma das variáveis desse reservatório de armazenamento, que permanece seco entre eventos chuvosos, é denominado de reservatório de detenção e constitui-se o objeto deste trabalho. Sua implantação e utilização são discutidas por meio das experiências da CDHU, através de estudos de casos reais, onde prova-se que a incorporação desse novo dispositivo de drenagem urbana é ainda um assunto polêmico, para o qual técnicos, governantes e população estão despreparados. É legítimo o anseio da sociedade por medidas sustentáveis e ambientalmente corretas, na qual os reservatórios de detenção se enquadram, porém sua implementação por força de medidas legais, muitas vezes, tem sido realizada de forma pouco conseqüente, sem planejamento e ponderação quanto às dificuldades e implicações dessa atitude. Denota-se também, a necessidade de avaliação da eficiência destes dispositivos e de normatização das formas de aplicação, dimensionamento, operação e manutenção. Além disso, é necessário a sensibilização, a conscientização e a educação em todos os níveis, pois existem paradigmas a serem quebrados e obstáculos a serem vencidos. Ao final do trabalho, sugere-se um pequeno roteiro com diretrizes gerais para incorporação dos reservatórios de detenção em novos empreendimentos, com o intuito de orientar e facilitar a utilização desses dispositivos, melhorando sua aceitação pela sociedade.<br>New stormwater control techniques have emerged during last years, trying to mimic and keep the natural conditions of hydrologic cycle. One of these measures, known as storage facility, detains part of the rainfall runoff to release it at controlled rates downstream, attenuating the hydrograph peak and redistributing the volume over a certain period of time. The focus of this report is the detention basin, a storage facility designed to empty out between runoff occurrences. Its insertion and use are discussed through CDHU experiences, based on real cases, where the results show that this new urban drainage control system is still a polemic issue, for what technicians, governments and population are unprepared. Societys concerns about sustainable and environmentally correct measures, inside which detention pond is placed, are rightful, however its implementation in the course of legal procedures has been made carelessly, unplanned and without considerations of difficulties and impacts. In addition, evaluation of its performance along with regulation of using forms, dimensioning, operation and maintenance are also required. Moreover, sensitiveness, consciousness and education related to detention basin should be improved, since there are paradigms to be broken and obstacles to win. At the end of this report, it is suggested some guidelines to incorporate detention basins in new land development, not only to facilitate and instruct the use of this structure, but also to improve societys acceptance.
11
Sahin, Erdal. "A Study On Flood Management Practices For Guzelyurt." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614588/index.pdf.
Full textAbstract:
This study deals with the investigation of characteristics of a flash flood and development of design of flood mitigation facilities occurred in Gü<br>zelyurt in North Cyprus on 18th of January, 2010 and development of design of flood mitigation facilities. Hydrologic and hydraulic modeling of this flood event has been utilized to develop solutions for preventing the region from the flood. Topographical maps and soil properties are used in hydrological modeling. The data are inserted into a geographical information system program (ARC-GIS) where basin properties are obtained. Since there is no any stream flow gauging station along the creeks in the study area, the synthetic unit hydrograph is developed by using Soil Conversation Service Method to obtain design flood hydrographs. In hydraulic modeling, the cross-section data of Fabrika Creek and Bostanci Creek are taken by using global navigation satellite system (GNSS) device and total station. These data are entered into the HEC-RAS program. Flood inundation maps are generated for both creeks. After hydrological and hydraulic modeling, two solutions are proposed. The first one is to build a detention basin for storing water and a lateral channel.
for diverting extra flow from Bostanci Creek to Fabrika Creek. The second solution is to build a lateral channel from Bostanci Creek to Gü<br>zelyurt Dam for diverting all water during a flood event. Based on hydrologic, hydraulic, and cost analysis, the first solution is accepted to be the feasible solution. In addition, flow carrying capacities of the creeks are improved.
12
Yan, Hexiang. "Expérimentations et modélisations tridimensionnelles de l’hydrodynamique, du transport particulaire, de la décantation et de la remise en suspension en régime transitoire dans un bassin de retenue d’eaux pluviales urbaines." Thesis, Lyon, INSA, 2013. http://www.theses.fr/2013ISAL0034/document.
Full textAbstract:
Les bassins de retenue des eaux pluviales sont utilisés pour préserver la qualité des eaux réceptrices par sédimentation pendant le temps de pluie. Cependant, les efficacités du bassins n'étaient pas satisfaisants en raison de la mal compréhension du processus de sédimentation. Afin de mieux comprendre ces processus dans des ouvrages in situ, cette thèse porte à la fois sur des expérimentations in situ et sur les modélisations de l'hydrodynamique et du transport particulaire dans les bassins de retenue pilotes et in situ. Cette recherche s’est appuyée en grande partie sur le bassin Django Reinhardt (BDR) à Chassieu (volume: 32000 m3, surface: 11000 m2) dans le cadre de l’OTHU et sur les données expérimentales obtenues par Dufresne (2008) et Vosswinkel et al. (2012). Les échantillons de sédiments ont été prélevés et leurs caractéristiques physiques ont été analysées en laboratoire dans le but de cerner leur distribution spatiale. Concernant la modélisation numérique, les simulations de l’hydrodynamique en régime permanent ont été réalisées à l'aide du logiciel CFD Fluent et ont été évaluées à partir de l’analyse de corrélation entre le comportement hydrodynamique du bassin et la distribution spatiale des caractéristiques physiques des sédiments. Les conditions limites sur le fond couramment utilisées et largement décrites dans la littérature ont été testées dans le but de représenter la distribution spatiale des sédiments et l’efficacité de décantation du BDR. Les conditions testées sont : i) contrainte de cisaillement critique ou bed shear stress – BSS et ii) énergie cinétique turbulente critique ou bed turbulent kinetic energy - BTKE. L’approche Euler-Lagrange dite « particle tracking » a été mise en œuvre. En raison de l'échec de prédiction des zones de dépôt à l’aide des conditions limites disponibles (BSS et BTKE), une nouvelle relation a été proposée pour estimer le seuil BTKE. La condition à la limite obtenue en utilisant cette nouvelle relation a été testée sur un bassin pilote (Dufresne, 2008) et sur le BDR en régime permanent. Les résultats obtenus n’étaient pas très satisfaisants concernant la prédiction des zones de dépôt et l’efficacité de décantation dans le bassin BDR, même en considérant une distribution granulométrique non uniforme. Afin de mieux prédire les zones de dépôt dans le BDR, une nouvelle méthode a été proposée en considérant le transport des particules, leur décantation et leur érosion en régime transitoire. Sur la base de la méthode proposée pour le transport des particules, la décantation et l'érosion en régime transitoire, plusieurs modélisations avec différentes conditions limites ont été réalisées dans un bassin de retenue pilote rectangulaire (Vosswinkel et al., 2012). Les prédictions des efficacités et des zones de dépôt en régime transitoire avec la méthode proposée sont satisfaisantes<br>Stormwater detention basins are used to preserve the quality of receiving waters by sedimentation during the wet weather. However, the removal efficiencies of basin were not satisfactory due to the not well understanding of the sedimentation processes. In order to further understand these processes in the real facilities, this thesis therefore focuses both on in situ experiments and modeling of the hydrodynamic and sediment transport in field detention basin and in small scale basin in laboratory. This research was supported by large part on the Django Reinhardt basin (DRB) in Chassieu within the OTHU program and the experimental data deriving from Dufresne (2008) and Vosswinkel et al. (2012). Samples of sediments accumulated in the basin were collected and their physical characteristics were analyzed in order to determine their spatial distribution. Concerning numerical modeling, the hydrodynamic simulations in steady state were performed using CFD software Fluent and were evaluated by the correlation analysis between the hydrodynamic behavior of DRB and the spatial distribution of the physical characteristics of sediments. The bed boundary conditions used in the literatures were tested in order to represent the spatial distribution of sediments and removal efficiency of DRB. The conditions tested were: i) critical bed shear stress - BSS and ii) critical bed turbulent kinetic energy - BTKE. Because of the failure prediction of DRB deposit zones with usual bed boundary conditions, a new relationship based on particle settling velocities has been proposed to estimate the BTKE threshold for the bed boundary condition. The proposed boundary condition was tested in a pilot basin (Dufresne, 2008) and the DRB using the Euler-Lagrange approach under steady flow conditions. The results were not very satisfactory regarding the DRB deposit zones, even considering non-uniform grain size. In order to better predict the deposit zones and settling efficiency in field detention basins, a new method has been proposed accounting for the sediment transport, settling and erosion under unsteady conditions. Based on this proposed method for representing the particle transport, settling and erosion processes under unsteady conditions, various simulations with different bed boundary conditions were carried out in a pilot rectangular basin (Vosswinkel et al., 2012). The predictions of removal efficiencies and deposition zones are satisfactory. Hence, taking into account transient effects on both hydrodynamics and sediment transport leads to drastically improve the spatial and temporal distributions of sediments in settling detention basins
13
Sebastian, Christel. "Bassin de retenue des eaux pluviales en milieu urbain : performance en matière de piégeage des micropolluants." Thesis, Lyon, INSA, 2013. http://www.theses.fr/2013ISAL0129/document.
Full textAbstract:
Les bassins de retenue des eaux pluviales constituent des éléments importants de gestion des rejets urbains de temps de pluie (RUTP). De nombreuses études montrent que, lorsqu’ils sont bien conçus, ils permettent de lutter contre les inondations et de décanter efficacement la pollution métallique et les hydrocarbures fortement fixés aux matières en suspension (MES). Le travail se propose d’étudier les performances de ce type de système afin d’en mesurer et d’en modéliser leur efficacité en termes d’abattement de micropolluants à une échelle évènementielle. Pour cela, il a été développé un suivi expérimental d’un bassin en service sec et étanche de grande taille localisé à l’exutoire d’un bassin versant drainé par un réseau d’assainissement séparatif pluvial faisant partie de l’Observatoire de Terrain en Hydrologie Urbaine (OTHU). Ainsi un total de 100 micropolluants (MP) a–t-il été suivi : 22 éléments traces métalliques (ETM), 16 hydrocarbures aromatiques polycycliques (HAP), 2 alkylphénols (AP), 5 alkylphénols éthoxylates (APEO), Bisphénol A, 9 polybromodiphényléthers (PBDE) et 45 pesticides. Dans les eaux, ils ont été analysés en phase dissoute et particulaire en entrée et en sortie. 67 % des MP recherchés ont été détectés au moins une fois en entrée ou en sortie. Les concentrations moyennes évènementielles à l’exutoire du bassin versant alimentant l’ouvrage sont comparables aux données de la littérature quand elles existent et montrent une grande variabilité. L’efficacité massique évènementielle (EME) de piégeage des MP a été évaluée selon différentes méthodes, prenant en compte les incertitudes totales. L’efficacité est avérée pour la majorité des ETM et HAP, sur un nombre limité de campagnes pour les PBDE et les APEO, très limité pour le 4-Tert-Octylphénol et le 4-Nonyphénol (1 sur 5). Les performances de l’ouvrage ont été mises en avant pour 7 pesticides (sur 15 détectés) mais des efficacités négatives témoignent d’un relargage possible des polluants. L’étude des sédiments accumulés dans le bassin depuis 6 ans montre qu’ils sont assez chargés tant en métaux, HAPs qu’en 4-Nonylphénol, BDE209 et Diuron. Enfin, nous avons expérimenté 3 niveaux de modèles afin d’identifier des pistes pertinentes pour la suite des travaux dans ce domaine<br>Detention basins are at stake in urban stormwater discharges (USWD) management strategies. If well designed, they are not only used to mitigate stormwater flood impacts but also to trap metals and hydrocarbon compounds strongly bounded to total suspended solids (TSS). An experimental monitoring, in the framework the Field Observatory on Urban Hydrology (OTHU), was developed on a large dry detention basin located at the outlet of a catchment drained by a separate stormwater system. This basin presents a rather classical and current configuration.A sum of 100 substances was studied: 22 metals (ETM), 16 polycyclic aromatic hydrocarbons (PAH), 2 alkylphenols (AP), 5 ethoxylate alkylphenols (APEO), Bisphénol A, 9 polybromodiphenylethers (PBDE) and 45 pesticides. They were analyzed in both dissolved and particulate phases in water at the inlet and outlet of the device. 67% of MP studied was detected at least once at the inlet or outlet. Event mean concentrations were in the same range as literature data when available and showed an important variability.Event mass efficiency (EME) in trapping MP was assessed by different methods taking account for global uncertainties. Acceptable efficiency was found for most of ETM and PAH and in a lesser extent for PBDE and APEO on a limited number of campaign. The detention basin had only a positive impact on alkylphenols (4-Tert-Octylphenol and 4-Nonylphenol) for one campaign out 5. Negative values for 7 pesticides (among 15 detected) indicated possible pollutant release. Accumulated sediments study showed high MP concentrations in particular for metals, PAH, 4-Nonylphenol, BDE209 and Diuron. Lastly, different levels of models were tested to try to identify relevant ones for further work
14
Dorman, Michael E. "A methodology for the design of wet detention basins for treatment of highway stormwater runoff." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-08142009-040351/.
Full text
15
Zhu, Junlin. "Simulation and design of diversion and detention system for urban stormwater management." Thesis, Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/94495.
Full textAbstract:
Diversion of the first flush of storm runoff to a detention basin for pollutant removal is an efficient way to control nonpoint source pollutant in urban areas. This can be achieved by a diversion box and detention basin system. To numerically simulate the response of the system to a design rainfall event and the associated pollutant loadings for a given drainage area, a desk top model has been developed for"user-friendly"' application in personal computers. Hydrographs and pollutographs are generated at the inlet and outlet of the diversion box and the detention basin.These hydrographs and pollutographs are examined and the peak outflow and peak pollutant concentrations are compared with allowable outflow and pollutant concentration for urban stormwater quality and quantity management. This model is designed for both the analysis and design of the system.<br>M.S.
16
Jonge, Gerard de. "Over de kwaliteit van detentie het strafvonnis als basis voor detentieplanning /." Maastricht : Maastricht : Universiteit Maastricht ; University Library, Maastricht University [Host], 2008. http://arno.unimaas.nl/show.cgi?fid=14887.
Full text
17
Caporuscio, Elizabeth. "EVALUATION OF A SEQUENTIAL POND SYSTEM FOR DETENTION AND TREATMENT OF RUNOFF AT SKYPARK, SANTA'S VILLAGE." CSUSB ScholarWorks, 2018. https://scholarworks.lib.csusb.edu/etd/773.
Full textAbstract:
Understanding the extent to which human activities impact surface water resources has become increasingly important as both human population growth and related landscape changes impact water quality and quantity across varying geographical scales. Skypark, Santa’s Village is a 233.76-acre tourism-based outdoor recreation area located in Skyforest, California residing within the San Bernardino National Forest. The park is situated at Hooks Creek, the headwaters of the Mojave River Watershed, and is characterized by a diverse landscape that includes forest cover and human development, including impervious surfaces, a restored meadow, and recreational trails. In 2016, Hencks Meadow was considered degraded by human activity and restored by the Natural Resources Conservation Services (NRCS) using best management practices (BMPs) to manage stormwater runoff and mitigate pollutants entering recreational downstream surface water. Three BMP detention basins were constructed to store and improve water quality from stormwater runoff. The purpose of this study is to observe the extent to which the engineered BMP detention basins design were effective in mitigating stormwater pollution from entering Hooks Creek. Over a six to eight month period (January to August), ponds were tested in situ bi-weekly for temperature (ºC), dissolved oxygen (mg/L), pH, turbidity (NTU), conductivity (µS/cm), nitrate (mg/L), and ammonium (mg/L), with additional laboratory tests for total suspended solids (mg/L), total dissolved solids (mg/L), chemical oxygen demand (mg/L), total coliform (MPN/100mL), Escherichia coli (MPN/100mL), and trace metals (µg/L). The results of this study support that the BMP design is improving surface stormwater runoff from impervious surfaces before it enters Hooks Creek. Findings could also promote the design and implementation of stormwater BMP detention basins at other site locations where water degradation is evident. Furthermore, this research can be used to promote the necessary improvement of water quality and quantity on a widespread geographical scale.
18
Assunção, Vitor Rafael de Andrade. "Proposta de metodologia de cálculo para reservatórios de detenção em bacias hidrográficas urbanizadas." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-26092012-152554/.
Full textAbstract:
Diversos são os transtornos causados pelas inundações dentre os quais se destacam problemas ambientais, sanitários, de perdas materiais e humanas. Os maiores agentes destas inundações são o crescimento urbano não planejado, que ocasiona a impermeabilização indiscriminada das áreas urbanas gerando maior volume escoado, e a ocupação de várzeas. As bacias de detenção são caracterizadas por sua destinação ao amortecimento dos picos de cheias por meio da contenção de parte do volume escoado superficialmente. No presente trabalho fez-se uma proposta de pré-dimensionamento de bacias de detenção, fundamentada no método racional e associada a relações IDF, que permite o cálculo dos volumes de detenção. A viabilidade e segurança do modelo foram verificadas comparando a proposta desenvolvida com metodologias consagradas entre projetistas, sendo utilizado como referência o procedimento desenvolvido por Porto (2002). De modo a permitir uma melhor avaliação dos métodos estudados foram analisadas interferências relativas às mudanças no tempo de concentração da bacia e na duração dos eventos chuvosos. O processo proposto apresentou resultados satisfatórios quando aplicado à bacia do córrego do Andrezinho na cidade de Pirassununga, São Paulo, assegurando em seus melhores ajustes diferenças máximas da ordem de 5% do volume estimado como ideal.<br>Several disorders are occurred by the floods of which are highlighted environmental issues, sanitary, of human and material losses. The main agent of these floods is the unplanned urban growth which causes sealing of urban areas generating higher volumes disposed. The detention ponds are characterized by their allocation to the dampening of flood peaks through retention of part of surface runoff. The present work proposes the pre-sizing of detention basins, based on rational method and associated with IDF relations which allows the calculation of the volumes of detention. The feasibility and safety of the model were verified by comparing the proposal with methods traditionally developed between designers, being used as reference the procedure developed by Porto (2002). In order to allow a better evaluation of the methods studied were analyzed interferences related to changes in the watershed concentration time and duration of rainfall events. The proposed method showed good results when applied to the basin of the Andrezinho stream in the city of Pirassununga, Sao Paulo, ensuring in their optimum settings with maximum differences about 5% of the volume estimated as ideal.
19
Čupr, Pavel. "Zdravotně technické instalace výrobních budov." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240028.
Full textAbstract:
This thesis addresses plumbing systems for manufacturing building. The theoretical part explores ways of draining stormwater. Experimental part is measuring consumption of water. Project part solves plumbing systems in specified manufacturing building.
20
Hüffner, Anelise Nardi. "Otimização para controle de alagamentos urbanos : aplicação na bacia hidrográfica da vila Santa Isabel em Viamão, RS." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/78975.
Full textAbstract:
O crescimento rápido e descontrolado da urbanização, principalmente nos países em desenvolvimento, vem provocando impactos significativos tanto no meio ambiente quanto para a própria população. A existência de áreas altamente impermeabilizadas traz como consequência o aumento do volume escoado superficialmente, causando aumento nas vazões máximas de até seis vezes a vazão de pré-urbanização. Surge, então, a necessidade de alternativas que solucionem ou reduzem os problemas relacionados ao aumento do volume escoado, não somente que os transfira para outro local. Neste sentido, pode-se aplicar as Melhores Práticas de Gestão (Best Management Practices – BMPs), medidas que servem no gerenciamento das águas pluviais em áreas urbanas, destacando-se os reservatórios de detenção. Neste contexto, o presente trabalho tem como objetivo desenvolver um método para avaliar a minimização do impacto hidrológico de uma bacia urbanizada para que ela se comporte de maneira hidrologicamente semelhante às condições de pré-urbanização, analisando os custos de implantação de bacias de detenção para evitar alagamentos à jusante. Para isso, fez-se uso de simulação hidrológica com modelo IPHS1 para determinação dos hidrogramas de saída dos afluentes da bacia estudada. O dimensionamento dos reservatórios foi realizado com a aplicação do método da curvaenvelope e a escolha dos melhores locais para implantação deu-se a partir da análise dos hidrogramas. Com isso, ajustaram-se funções do tipo Qp=f(V). Estas funções foram utilizadas no modelo de otimização não-linear, considerando-se diferentes restrições de custo. A área de estudo corresponde à bacia hidrográfica Mãe D’água, de 3,39 km², localizada na Vila Santa Isabel no município de Viamão/RS. Os resultados mostraram que a aplicação de uma técnica de otimização associada a um modelo hidrológico mostrou-se útil na avaliação dos custos de projetos de controle do escoamento pluvial (bacias de detenção) urbano para a bacia estudada, podendo servir como material de consulta para o Poder Público e Privado. Além disso, mesmo sem disponibilidade de dados hidrológicos observados e informações mais detalhadas acerca do processo de urbanização da área de estudo, é possível, através da aplicação da metodologia apresentada, desenvolver cenários para análise do aumento da zona urbana e quantificação do impacto hidrológico, para que assim o problema identificado seja minimizado.<br>The rapid and uncontrolled urbanization, especially in developing countries, has led to significant impacts on both the environment and people themselves. The existence of highly impermeable areas brings as consequence the increase in surface runoff volume, causing an increase in peak flows up to six times the pre-urbanization flow. This requires thus, the need of alternatives to solve or reduce the problems related to the increased volume disposed, and not only transferring it to another location. In this context, the Best Management Practices (BMPs) can be implemented, which are measures for managing storm water in urban areas as, for example, the detention reservoirs. Thus, this work aims to develop a method to evaluate the hydrological impact minimization of an urbanized basin, so that it can behave hydrologically similar to pre-urbanization conditions, analyzing deployment costs of detention basins to prevent flooding downstream. Hence, a hydrologic simulation model with IPHS1 has been used to determine the studied basin tributaries output hydrographs. The reservoirs sizing was evaluated with the application of the Envelope-Curve Method and the choice of the best localizations for their implantation was done by analyzing the hydrographs. Therefore, functions as Qp=f (V) were fitted. These functions were used in the nonlinear optimization model considering different costs constraints. The study area represents the Mãe D’água watershed, with 3,39 km², located at Vila Santa Isabel in Viamão/RS. The results showed that the application of an optimization technique associated with a hydrological model has proven to be useful in storm water runoff control projects costs evaluation (detention basins) for the urban study area and may serve as reference material for Government and Private institutions. Moreover, even without the availability of observed hydrological data and detailed information about the process of urbanization in the study area, it is possible, through the application of the presented methodology, to develop scenarios for analyzing the urban zone expansion and quantification of hydrological impact, in order to minimize the identified problem.
21
Ta, Hung, and 蔡宏達. "Regulatory Capability of A Double-basin Detention Pond." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/86769313822760117873.
Full textAbstract:
碩士<br>國立成功大學<br>水利及海洋工程學系專班<br>95<br>Abstract
The most important functions of flood detention facility are to reduce the run-off peak and delay the peak time. The purpose of installing detention pond is to regulate the outflow of developed catchment back to its original state of prior to the development. The detention pond regulates the outflow to the downstream with effective detention volume and release facilities. Due to uncontrolled release design of a detention basin, the outflow pattern after development can not be restored to its original shape. Therefore the related regulations, such as Soil and Water Conservation Technical Norms, can only restrict the peak of outflow to a certain level. On the other hand, the detention pond has always stored massive amount of water before peak, a larger detention volume is necessary to regulate the peak outflow.
In order to improve the outflow efficiency before the peak flood, the double-basin detention pond has been installed on site, such as detention ponds in Tainan Science-Based Industrial Park. Double-basin detention pond has one more sub-basin than the single-basin detention pond. The added sub-basin is designed to store the extra inflow during the peak flood. Therefore, it would be more efficient to regulate the developed catchment’s outflow hydrograph.
The target of regulation with using double-basin detention pond in this thesis is set to regulate the designed hydrograph after development to possibly approach the hydrograph before development during larger flow stage. Furthermore, the regulated peak outflow is not allowed to exceed the hydrograph before development. The results will suggest the best configuration of double-basin detention pond facilities, as well as used to review the effectiveness of flood regulatory capability of such detention ponds.
The case studies applied Gauss-Newton method to obtain the optimal design of a double-basin detention pond under various known hydrologic conditions (such as the designed inflows before and after development, the flood peak arrival time, etc.) The characteristics and effectiveness of double-basin detention pond can be explored from the optimal design:
1. The double-basin detention pond required only 57% area of a single basin detention pond to reduce the designed peak flow of a triangular hydrograph.
2. With proper designed areas of the main basin and sub-basin, height of the overflow weir, diameter of the outlet, it is possible to restore the outflow hydrograph close to it’s original shape before the development.
22
Saunders, William Lewis. "Detention basin design to mitigate regional peak flow impacts." 2006. http://www.lib.ncsu.edu/theses/submitted/etd-01082007-121359/unrestricted/etd.pdf.
Full text
23
Yang, Kuo Hsun, and 楊國勳. "Optimal Design for a Double-Basin Detention Pond System." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/12432167951979991900.
Full text
24
Ho-ChengLeong and 梁可正. "Post Occupancy Evaluation of Tainan Rende Multifunctional Detention Basin." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/7j7z65.
Full textAbstract:
碩士<br>國立成功大學<br>都市計劃學系<br>105<br>Tainan city government is committed to the development of the tough city as the goal, in response to climate change derived from the frequent rainstorms, the city the government on the lack of flood detention facilities, countermeasures proposed to increase the storage and detention space, combined with another adjustment strategies and urban functions to improve the ecological environment Biodiversity and the provision of public recreation and other functions. However, the government's management of the multi-purpose flood detention basin is still in the basin of flood storage and drainage facilities, and there is no a management approach that takes into account the comprehensive function.
In the past, the design of the flood detention basin was mainly guided by the decision maker, and the related research on the structure design, hydrological design or detention facilities, etc. But there were not mentioned the residents satisfactions. Therefore, this study will be based on the case study of the Rende Disaster Basin in Tainan City, and then use the post-evaluation method to distribute the questionnaire to the nearby people, students, and teachers to understand the local cognition and use of the multi-functional flood detention basin.
The study found that in the Rende area where the rain came, the flood discharge basin played its important role to reduce the probability of major flooding. However, residents do not understand the purpose of the construction of the flood detention basin, although the construction of the basin to reduce the occurrence of flooding, but the residents still subjective that the flood can not solve the flood problem if there is no role, so most residents of the flood detention basin set satisfaction That is acceptable. The author believes that the design unit is limited by the funding problem, as well as the lack of education and publicity, so did not take into account the user needs and awareness of the detention basin.
25
Middleton, John Rob. "Improved extended detention basin performance through better residence time control." Thesis, 2006. http://hdl.handle.net/2152/31022.
Full textAbstract:
Extended detention basins are not used for stormwater quality management in many areas of the US because they generally do not achieve the 80% removal of total suspended solids required by many regulatory agencies. The objective of this research was modification of the outlet controls of an existing basin to provide batch treatment of the urban stormwater runoff through efficient control of the hydraulic residence time. A solar powered automated valve and controller were developed and placed on the outlet of an extended detention basin in Austin, Texas to increase the detention time beyond the times achievable using an orifice. This system retained the diverted runoff in the basin for a variable preset period of time. The quality of the influent and effluent of the basin was monitored for concentrations of suspended solids, nutrients, chemical oxygen demand. and total and dissolved metals. The suspended solids concentrations in the basin were controlled by adjusting the residence time of the runoff in the basin to meet the required pollutant reduction. The automated valve can also be used to regulate flow into the receiving waters to control peak flow.
26
TSOU, TSUNG-YING, and 鄒宗穎. "Landscape Planning of the Yi-Wu Detention Basin in Yunlin County." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/933hf8.
Full textAbstract:
碩士<br>東海大學<br>景觀學系<br>105<br>The Yi-Wu detention basin in Kouhu township of Yunlin County , usually play the role of water conservancy facilities to reduce the flood disaster, the beautiful scenery of the pool, as well as diverse biological wetland environment, arouse the community to attract the tourism and recreation in the region force. The project is expected to achieve the goal of protecting ecological resources, promoting tourism activities and sustainable land management through the landscape planning of flood detention ponds.
Based on the patch, corridor and matrix of the landscape ecology in the spatial structure, this plan introduces the concept and spirit of ecological engineering, simulates the reconstruction of the ecological system, Self-growth and pulsating system planning, emphasizing the stability of ecosystems and self-design, creating a variety of species living environment, to improve biodiversity, the conservation of natural resources, into the landscape planning concept. According to the base space development function, the planning base space division as the core conservation area, ecological rehabilitation area, environmental education area and facilities activity area, according to the implementation of land use, traffic planning, public facilities and plant and other related substance plan content.
Landscape planning of detention basin s based on ecological resources, in the reconstruction of the ecosystem environment under the premise of the use of landscape ecology to reconcile human activities and animal and plant living environment, create ecology, landscape and leisure recreation function, improve public satisfaction with leisure activities To bring together tourism and tourism crowd, to promote tourism activities, to create local employment opportunities, the development of local characteristics of the diversified industries, to enhance the quality of life, promote local economic prosperity, to achieve the ultimate benefit of land sustainable use.
27
Fu, Lee Ying, and 李英福. "Sediment Trapping Efficiency Resulted from Detention Pond Sediment Basin Combined Design." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/96199773890711915441.
Full textAbstract:
碩士<br>國立屏東科技大學<br>水土保持系<br>92<br>Limited land resources and high population density has restricted land development in Taiwan. The limitation further reduces land use efficiency form the viewpoint of economy; especially for small landholders provided that both sediment basin and detention pond are implemented. Hence, combined design of sediment basin and detention pond is suggested in the 2003 version of Soil and Water Conservation Technical Guideline. Lacking of research support with respect to sediment outflow from the combined design, it is necessarily to conduct scientific-sounded research.
Scale model of sediment basin and detention pond combined design in 1:15 scale was used in this study to quantify the sediment trapping efficiency. Total of three peak inflows, four sediment inflow rates, three basin depths, and three sediment sizes were used in combination in this study.
The laboratory experiments indicated that (1). Large volume of coarse sediment outflow occurred at the tail end of the hydrograph due to collapse of trapped sediment, (2). Large volume of mid- and fine sediment outflows occurred during the arrival of peak flow, and (3). Sediment trapping efficiency of the combined design was greatly affected by the sediment settling velocity.
Results of this study can be additional summarized as follows:
(1). The collapse of trapped sediment inside the combined design; due to the removal of hydrostatic pressure, produces high sediment outflow at the recession of the hydrograph. The flush of sediment outflow seldom occurs when sediment basin and detention pond are built separately.
(2). The sediment settling velocity, volume of the sediment basin, and the longitudinal dimension of the basin controls sediment trapping efficiency. Higher the preceding parameters, higher the trapping efficiency. The trapping efficiency is greatly affected by the sediment settling velocity. However, the trapping efficiency is reduced when both inflow velocity and sediment inflow rate increase.
(3). The advantage of the combined design has been demonstrated in this study, of which, the sediment trapping efficiency decline as compared to that of the separated design. However, the trapping efficiency remains 80% without offsetting the flood detention. Nevertheless, the major drawback of the combined design is the outflow discharge quality fails to meet the suspended-solid discharge standards set by Environmental Protection Agency.
Further research is needed to improve the sediment trapping efficiency of the sediment basin and detention pond combined design, so that both aspects of economic development and disaster mitigation can be converged.
28
Huang, Chung-Hsing, and 黃中信. "Effects of using Suitable Detention Ponds for San-yei River Basin Integrated Flood Control Plan." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/72029791708738194854.
Full textAbstract:
碩士<br>國立成功大學<br>水利及海洋工程學系碩博士班<br>95<br>The environmental and climatic changes and rapid urbanization of some areas in Taiwan have caused serious flooding several times in these areas. This is owing to the shorter concentration time and higher peak value of the rainfall runoff. In recent years integrated flood control method, such as including the use of retention ponds to mitigate flood damages, has been proposed. Not only the water stored in the retentions can reduce peak discharge, but also it creates other benefits, such as it can become very good ecologic and landscape parks. In addition, it can also avoid some social conflicts of using precious land resource for channel widening improvements.
The effectiveness of setting retentions for flood mitigation is either influenced by the topography and hydrology characteristics or by the location and size of the retentions. In the San-yei River basin, 10 agriculture regions, A-I, of little farming activities and inhabitant are called in this study as “the suitable areas” for the use as the retentions. The well known SOBEK model is used as a tool to assess the size and position of single and jointed retentions on the effectiveness of flood mitigation by comparing the flooding areas.
The result shows that setting up retention at downstream regions, such as H and I even if they have larger area, have less effectiveness; but those retentions at upstream catchment, A~I, perform better in reducing flood area. Through a series of simulations, it is proposed that if the retention areas are set as: A 12 ha, B 7.5 ha, C 4 ha, D 9 ha, E 5 ha, F 9 ha, and G 8 ha, then they can reduce 47.6% of flooding area for a 10 years return period storm flood.
29
Chun-YinMan and 萬俊然. "A Preliminary Site Selection Study on Watershed Public Facilities as Multi-use Detention Basin: An Environmental Efficiency Perspective." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/ka2bsv.
Full textAbstract:
碩士<br>國立成功大學<br>都市計劃學系<br>107<br>The frequency of urban flooding and loss have been severely raised over the past decade. The recent flood mitigation measurements have gradually resorted to using urban land as the runoffs allocation unit. However, to wholly practice the strategy in the highly developed urban areas, it is required to overcome a long-term rezoning procedures with enormous land expropriation fees. Thus, using existing public facilities as detention basins has been widely considered as a effecient measure to reduce the risk by the extremely and uncertainly rainfall events.
In terms of the functions of detention basins, recent researches pays an increasing attention to its synthesis physiological and psychological well-being as well as the ecosystem services. This form of detention basin namely Multi-use Detention Basin(MDB). Although the benefits of MDB have been widely discussed, there is a limited literature research on the site selection problem on MDB in the decision making context.
This study established a two-stages screening and evaluation MDB site selection framework based on the environmental efficiency perspective. Data envelopment analysis(DEA) and cross-efficiency evaluation is applied to build the best alternative site ranking, and then compared with the traditional single flood mitigation efficiency perspective on detention basin site ranking. The result indicated that the two decision perspectives showed a certain trade-off relation on the MDB site ranking by the reason of geographical and hydrological heterogeneity. Slack variable analysis was further applied to identify the efficiency difference between the condidate sites. This study proposed a new MDB site selection framework, in terms of the urban well-being and environmental efficiency perspective.
30
Yu-LunChueh and 闕裕倫. "A Study of Relevance of Urban Detention Basin and Real Estate Values - A Case Study of Sanmin District in Kaohsiung City." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/35g6j5.
Full textAbstract:
碩士<br>國立成功大學<br>都市計劃學系<br>103<br>In recent years, Taiwan has faced increasing risks and disaster due to flooding, and the government has employed urban detention basin, which is the subject of this study, as a new mitigation strategy for urban drainage to improve people's acceptance. However, urban detention basin combined detention pond (NIMBY effect) and park (YIMBY effect). The impact of urban detention basin to surrounding environment real estate value is the main issue of this study. Thus, we use real estate values as measurement, and focus on the effects of flooding events and urban detention basin on housing price. Considering ordinary least squares (OLS), which is common method for estimating the impact of the facility on the real estate, can’t effectively deals with spatial problem, we use geographically weighted regression model (GWR) as main research method to investigate the relevance of urban detention basins and real estate values.
Our research finds: (1) Although flood event causes adverse impact to real estate, the impacts caused by building age and floor area are more significant. (2) The impact of urban detention basin to real estate in areas affected by flooding is more significant than those in areas never affected by flooding. (3) Urban detention basin cause positive impact to real estate. In locations affected by flooding, it's a “YIMBY and NIMBY coexist” facility, and in locations never affected by flooding, it's a YIMBY facility.
31
Parnell, Allison. "Effects of Anthropogenic Nutrient Enrichment on Exotic and Restored Native Aquatic Vegetation." Thesis, 2011. http://hdl.handle.net/1969.1/ETD-TAMU-2011-05-9147.
Full textAbstract:
Understanding how nutrient input into coastal wetlands influences aquatic vegetation and the fate of anthropogenic nutrient inputs can help improve water quality management plans. The goals of this study were to (1) compare nutrient concentrations in various storage compartments downstream from two point nutrient sources (a sewage treatment plant outfall and a residential detention basin) in Armand Bayou, a coastal brackish wetland in the Galveston Bay (Texas, USA) watershed, and (2) determine if nutrient storage in those compartments helped improve water quality downstream.
Water column nutrients can be assimilated by aquatic vegetation, adsorbed to sediment, or diluted within the system as distance from source input increases. To determine the fate of nutrients to Armand Bayou, I measured nutrient concentrations in the sediment, water column, pore water, and tissue of exotic and restored native plants downstream from a sewage treatment plant and a residential detention basin. To assess nutrient removal potential of a common exotic species, I determined relative growth and nutrient uptake rates of Eichhornia crassipes. Water column total nitrogen, NH₄⁺ and NO₃ˉ concentrations decreased by 95, 96 and 99 percent downstream from the sewage outfall (~2200 m distance). Water column NH₄⁺ and NO₂ˉ concentrations decreased by 93 and 75 percent downstream from the detention basin (~2500 m distance). Exotic species Alternanthera philoxeroides, Pistia stratiotes and E. crassipes showed higher aboveground/emergent tissue nutrient content than restored, native Schoenoplectus californicus for both tributaries. Schoenoplectus californicus had the largest biomass although appeared to be limited in its ability to remove nitrogen from the water column. Nutrient uptake rates by E. crassipes were low and did not change with increasing distance from nutrient source, but high relative growth rates in both tributaries suggest the nuisance potential of this exotic species. Low sediment and pore water nutrient concentrations for both tributaries suggest these compartments are not sinks. All plant species did not respond to changes in water column nutrient concentrations with increasing distance from source input suggesting dilution to be the main factor in water column nutrient decline for both tributaries.
This study will provide water quality resource managers guidance on the development of total maximum daily loads (TMDLs) for water bodies impaired by high nutrient loading and the implementation of wetland plants efficient in nutrient removal for water quality improvement.
32
Takamatsu, Masatsugu. "Physical and conceptual modeling of sedimentation characteristics in stormwater detention basins." Thesis, 2006. http://hdl.handle.net/2152/2937.
Full text
33
Garza, John David. "Probabilistic analysis in surface water hydrology: Open drainage channels and detention basins." Thesis, 1996. http://hdl.handle.net/1911/14050.
Full textAbstract:
A reliability-based method for analyzing open drainage channels and detention basins using the full marginal distributions of uncertain parameters together with correlation coefficients will be presented in this work. A first and second order component reliability analysis will be performed using the computer program CALREL. Reliability results can be used both in performance and safety assessment of existing structures and in designing structures for a target reliability level. For the case of an open drainage channel, the computed reliability index will be compared with the usual safety factors of design, and a comparison will also be made of the reliability indices obtained using different runoff formulations. For the case of a detention basin, reliability results will be used as a design tool in the sizing of detention basins. The interaction of channels and basins will also be addressed.
34
Burgess, Nathan Alan. "Combining field data and computer modeling to improve designs for two wet detention ponds in James City County, VA /." 2009. http://hdl.handle.net/10288/1073.
Full text
35
謝志良. "Detention center and Shanghai foreign concession management (1854-1943)." Thesis, 2013. http://ndltd.ncl.edu.tw/cgi-bin/gs32/gsweb.cgi/login?o=dnclcdr&s=id=%22102CHU00493001%22.&searchmode=basic.
Full text
36
Brooker, Christopher John. "Detention storage for the control of urban storm water runoff, with specific reference to the Sunninghill monitored catchment." Thesis, 1997. http://hdl.handle.net/10539/21432.
Full textAbstract:
A project report submitted to the Faculty of Engineering, University of the
Witwatersrand, Johannesburg, in partial fulfillment of the requirements for the
degree of Master of Science in Engineering.
Johannesburg, 1997<br>Detention storage IS a well tested, and generally accepted, method of
attenuating flood hydrographs, but relatively littlo data is available from the
monitoring of full scale instc'lations An onstrearn pond was constructed at
Sunninqhill Park and details of 15 inflow and outflow hydro
[Abbreviated Abstract. Open document to view full version]<br>MT2016