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Dissertations / Theses on the topic 'Streamflow discharge'

Author: Grafiati
Published: 4 June 2021
Last updated: 4 February 2022

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1

Mueses-Pérez, Auristela. "Generalized non-dimensional depth-discharge rating curves tested on Florida streamflow." [Tampa, Fla] : University of South Florida, 2006. http://purl.fcla.edu/usf/dc/et/SFE0001781.

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2

Tecle, Aregai, Charles A. III Henke, and Charles C. Avery. "Assessing Similarities in Precipitation and Streamflow Discharge Among Three Upland Subwatersheds." Arizona-Nevada Academy of Science, 1998. http://hdl.handle.net/10150/296492.

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3

Mueses-Pérez, Auristela. "Generalized non-dimensional depth-discharge rating curves tested on Florida streamflow." Scholar Commons, 2006. http://scholarcommons.usf.edu/etd/2639.

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A generalized non-dimensional mathematical expression has been developed to describe the rating relation of depth and discharge for intermediate and high streamflow of natural and controlled streams. The expressions have been tested against observations from forty-three stations in West-Central Florida. The intermediate-flow region model has also been validated using data from thirty additional stations in the study area. The proposed model for the intermediate flow is a log-linear equation with zero intercept and the proposed model for the high-flow region is a log-linear equation with a vari
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4

Meyer, Neil. "Discharge measurement in terms of pressure differences at bridge piers." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/51731.

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Thesis (M.Eng.)--Stellenbosch University, 2000.<br>ENGLISH ABSTRACT: This study entailed the investigation and evaluation of a new methodology for measuring high discharges passing through bridges. Pressure differences generated around bridge piers have been measured and related to the discharges. These pressure differences are mainly functions of downstream flow conditions. The pressure differences have been converted into velocities by applying Newton's second law expressed in terms of the laws of conservation of energy; momentum; and of power. The energy principle was re-evaluated fol
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5

Darienzo, Matteo. "Detection and estimation of stage-discharge rating shifts for retrospective and real-time streamflow quantification." Thesis, Université Grenoble Alpes, 2021. http://www.theses.fr/2021GRALU006.

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Les séries temporelles de débit des rivières sont établies à l'aide de "courbes de tarage", qui sont des modèles avec les hauteurs d’eau en entrée et les débits en sortie. Malheureusement, de nombreuses stations hydrométriques ont une relation hauteur-débit instable, notamment à cause de l’évolution du lit de la rivière lors des crues. Ces "détarages" posent problème à la fois pour l'établissement des séries hydrologiques de long-terme (analyse rétrospective) et pour la fourniture de données en temps réel, par exemple pour la prévision des inondations, avec des incertitudes quantifiées et fiab
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6

Agafonov, Leonid I., David M. Meko, and Irina P. Panyushkina. "Reconstruction of Ob River, Russia, discharge from ring widths of floodplain trees." ELSEVIER SCIENCE BV, 2016. http://hdl.handle.net/10150/622663.

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The Ob is the third largest Eurasian river supplying heat and freshwater to the Arctic Ocean. These inputs influence water salinity, ice coverage, ocean temperatures and ocean circulation, and ultimately the global climate system. Variability of Ob River flow on long time scales is poorly understood, however, because gaged flow records are short. Eleven tree-ring width chronologies of Pinus sibirica and Larix sibirica are developed from the floodplain of the Lower Ob River, analyzed for hydroclimatic signal and applied as predictors in a regression model to reconstruct 8-month average (Decembe
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7

Mwangi, Hosea M., Stefan Julich, Sopan D. Patil, Morag A. McDonald, and Karl-Heinz Feger. "Relative contribution of land use change and climate variability on discharge of upper Mara River, Kenya." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-227067.

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Study region Nyangores River watershed, headwater catchment of Mara River basin in Kenya. Study focus Climate variability and human activities are the main drivers of change of watershed hydrology. The contribution of climate variability and land use change to change in streamflow of Nyangores River, was investigated. Mann Kendall and sequential Mann Kendall tests were used to investigate the presence and breakpoint of a trend in discharge data (1965–2007) respectively. The Budyko framework was used to separate the respective contribution of drivers to change in discharge. Future response o
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8

Mwangi, Hosea M., Stefan Julich, Sopan D. Patil, Morag A. McDonald, and Karl-Heinz Feger. "Relative contribution of land use change and climate variability on discharge of upper Mara River, Kenya." Elsevier, 2016. https://tud.qucosa.de/id/qucosa%3A30418.

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Study region Nyangores River watershed, headwater catchment of Mara River basin in Kenya. Study focus Climate variability and human activities are the main drivers of change of watershed hydrology. The contribution of climate variability and land use change to change in streamflow of Nyangores River, was investigated. Mann Kendall and sequential Mann Kendall tests were used to investigate the presence and breakpoint of a trend in discharge data (1965–2007) respectively. The Budyko framework was used to separate the respective contribution of drivers to change in discharge. Future response o
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9

Zmijewski, Nicholas. "Effects of Watershed Dynamics on Water Reservoir Operation Planning : Considering the Dynamic Effects of Streamflow in Hydropower Operation." Doctoral thesis, KTH, Vattendragsteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-201612.

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Water reservoirs are used to regulate river discharge for a variety of reasons, such as flood mitigation, water availability for irrigation, municipal consumption and power production purposes. Recent efforts to increase the amount of renewable power production have seen an increase in intermittent climate-variable power production due to wind and solar power production. The additional variable energy production has increased the need for regulating the capacity of the electrical system, to which hydropower production is a significant contributor. The hydraulic impact on the time lags of flows
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10

Nalder, Guinevere Vivianne. "Submerged Thin Plate Weirs With Unequal Upstream and Downstream Beds." The University of Waikato, 2006. http://hdl.handle.net/10289/2383.

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This thesis describes a short study to examine the behaviour of submerged flow over a thin plate weir with differing upstream and downstream bed levels i.e. an unequal bed weir as opposed to an equal bed weir where the upstream and downstream beds are at the same level. As submerged weir flow is a function of downstream conditions, it was thought that a lower downstream bed would make submerged flow over the weir easier, This is turn suggested that; The shape of the upstream head (Hu) vs downstream head (Hd) graph would change, being initially more steep in the unequal bed case. The Froude
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11

Nhim, Tum. "Variability of intermittent headwater streams in boreal landscape : Influence of different discharge conditions." Thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-183137.

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Dynamic expansions and contractions of stream networks can play an important role for hydrologic processes as they can connect different parts of the landscape to the stream channels. However, we know little about the temporal and spatial variations of stream networks during different flow and wetness conditions. This study focuses on the contraction and expansion of stream networks during different flow conditions in the boreal Krycklan catchment, located in Northern Sweden. The stream network and initiation points were extracted from a gridded digital elevation model (DEM) of 5-meter resolut
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12

Despax, Aurélien. "Incertitude des mesures de débit des cours d’eau au courantomètre. Amélioration des méthodes analytiques et apports des essais interlaboratoires." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAU009/document.

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Lors des crises (sécheresses ou crues) les données hydrométriques participent directement aux processus de décision pour la gestion en temps réel de la ressource en eau mais également à l'analyse a posteriori pour le règlement des litiges. Pour pouvoir prendre des décisions cohérentes, il est alors essentiel de connaître l'incertitude associée aux données de débit. Si les techniques hydrométriques se sont nettement améliorées au cours des dernières décennies, l'estimation des incertitudes reste un défi pour la communauté de l'hydrométrie.Cette étude, portant sur la quantification des incertitu
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13

Xu, Kejun. "Total suspended solids, discharge, conductivity, and nutrients in three watersheds of the Upper White River, IN." Virtual Press, 2004. http://liblink.bsu.edu/uhtbin/catkey/1307378.

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Three watersheds of Upper White River were chosen for this study. Stream samples were tested for total suspended solids and conductivity. Fourteen percent of the total suspended solids samples were above 80 mg L-1 which can cause negative effects to aquatic life. Total suspended solids results were tested with a general linear model and in linear regressions with discharge and nutrients. Conductivity results were tested with a general linear model. Concentrations of the total suspended solids were significantly related to watershed, Julian date, the interaction of watershed and Julian date, an
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14

Rizzo, Clarissa. "Comparison between Global Hydrological Models and observations: trend and drought analysis in England and Wales." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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Global hydrological models (GHMs) have been widely used in scientific studies to describe the hydrological cycle at large scale. Many improvements have been made to these models, e.g., to include human influences, such as reservoir operations, water uses and land cover changes. Given these enhancements, the question is now how well these models can reflect trends and drought characteristics found in streamflow observations in relatively small catchments, where flow might be altered by different (local) human influences. To answer this question, this study compares discharge simulated data fr
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15

Gunderson, Jeffrey Donald. "Assessing the Dendroclimatological Potential of Polylepis rodolfo-vasquezii in the Tropical Peruvian Andes." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1555517143001099.

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16

Cloete, Gert Christiaan. "River discharges derived from single velocity measurements." Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/50087.

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Thesis (MScEng)--University of Stellenbosch, 2004.<br>ENGLISH ABSTRACT: This work investigates methods to theoretically determine the lateral velocity distribution across a river from which factors may be derived to translate a single point velocity into average velocity for the river as a whole. A wide range of field data from vanous nvers was analysed. This produced over a hundred velocity distributions with which to compare theoretical distribution results. Four theoretical approaches were considered: the one-dimensional method (Manning's equation), a two-dimensional flow formula sol
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17

Gunther, U. K. (Uwe Karsten). "The application of Doppler velocity meters in the measurement of open channel discharges." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52485.

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Thesis (MEng)--University of Stellenbosch, 2001.<br>ENGLISH ABSTRACT: This report deals with the use of Doppler meters to measure flow velocities and hence discharges in streams. The Doppler meter measures the shift in frequency of an acoustic wave, which it emits and then becomes reflected by a moving particle. The reading is converted into a velocity by dividing the shifted frequency by a calibration constant. The particles that reflect the signal need to follow the flow sufficiently closely so that their velocity may be assumed equal to the flow velocity. A previous study on the use
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18

Chiu, Min-Nung, and 邱敏農. "Estimation of Groundwater Recharge and Discharge from Streamflow Hydrographs for Forested Watersheds in Central Taiwan." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/37254366074931303830.

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碩士<br>國立中興大學<br>水土保持學系<br>88<br>Groundwater accounts for an important portion of usable water resources. In the past, groundwater investigations often focus on regional characteristics and relationships between groundwater recharge and discharge. The objective of this study is to utilize appropriate methods for estimating the groundwater recharge and discharge that only requires streamflow data without considering the geological influences. This study applied the base-flow-record estimation method and the recession-curve displacement method to streamflow data from Lien-Hwa-Chi #3、#4 and #5 wat
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