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Dissertations / Theses on the topic 'Drainage. Agricultural engineering'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

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1

Sheler, Rebecca Joy. "The impact of agricultural drainage systems on hydrologic responses." Thesis, University of Iowa, 2013. https://ir.uiowa.edu/etd/2630.

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Over the past century of settlement, the landscapes of the Midwestern United States have experienced extensive anthropogenic modifications in order to convert prior wetlands-lowlands to subsequent fruitful croplands. The hydrologic responses of these landscapes have been significantly altered by the installation of artificial drainage (surface ditches and subsurface tile drains) and the change in natural preferential flow paths (increased cracks or root holes due to land use practices). Changes to peak stream flow behaviors is a result of many different inter-related variables; however, intens

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2

Ghane, Ehsan. "Evaluation of two technologies for enhancement of crop yield and drainage water quality." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1406114668.

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3

Littlejohn, Alex. "Nutrient mitigation capacity of low-grade weirs in agricultural drainage ditches." Mississippi State University, 2013.

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4

Pease, Lindsay Anne. "Characterization of Agricultural Subsurface Drainage Water Quality and Controlled Drainage in the Western Lake Erie Basin." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1461329788.

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5

Uribe-Chavez, Armando. "A numerical model and semi-analytic equations for determining water table elevations and discharges in non-homogeneous subsurface drainage systems." Diss., The University of Arizona, 2001. http://hdl.handle.net/10150/289956.

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A free water surface finite element model was developed. The method was implemented with the Galerkin approach to solve the Laplace equation in the saturated region. It was developed in the object oriented Visual C ++ computer language to permit easy update and drawing of the adaptive mesh. For each time step, the new water table position was calculated based on flux across the water table, a Brooks-Corey equation mass balance for the unsaturated region, and an equation that calculates water table position for the saturated region. An equation was developed to calculate a drainage transfer coe

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6

Craiovan, Emilia. "Evaluation of agricultural beneficial management practices: Cattle access restriction to surface waters subsurface tile drainage management." Thesis, University of Ottawa (Canada), 2009. http://hdl.handle.net/10393/28055.

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The aim of this study was to investigate two potential beneficial management practices that will reduce the impact of fecal and fertilizers contamination on the environment. The study was conducted in Eastern Ontario on typical small scale agricultural practices. The first part evaluates the impact of a conventional pasture system and an excluding pasture system on surface water quality. The three year study compared water quality endpoints such as: indicator bacteria, pathogens, parasites and nutrients between treatments. Microbial source tracking indicated that livestock was the main source

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7

Rodriguez, Jesus, and Jesus Rodriguez. "Downscaling Modis Evapotranspiration via Cokriging in Wellton-Mohawk Irrigation and Drainage District, Yuma, AZ." Diss., The University of Arizona, 2016. http://hdl.handle.net/10150/621782.

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Evapotranspiration (ET) is a key parameter for irrigation planning and management, and it is a crucial factor for water conservation practices considering the challenges associated with agricultural water availability. Field ET determination is the most accurate, but remains to be expensive and limited in scope. On the other hand, remote sensing is becoming an alternative tool for the estimation of ET. Operational ET algorithms, like the Moderate Resolution Imaging Spectroradiometer (MODIS)-based ET, are now successful at generating ET estimates globally at 1km resolution, however their intent

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8

Thomas, Nicholas Wayne. "Simulating the hydrologic impact of distributed flood mitigation practices, tile drainage, and terraces in an agricultural catchment." Diss., University of Iowa, 2015. https://ir.uiowa.edu/etd/2017.

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In 2008 flooding occurred over a majority of Iowa, damaging homes, displacing residents, and taking lives. In the wake of this event, the Iowa Flood Center (IFC) was charged with the investigation of distributed flood mitigation strategies to reduce the frequency and magnitude of peak flows in Iowa. This dissertation is part of the several studies developed by the IFC and focused on the application of a coupled physics based modeling platform, to quantify the coupled benefits of distributed flood mi

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9

Yassin, Adel Taha. "The Vertical Distribution of Salts in a Soil Profile During the Drainage Process." DigitalCommons@USU, 1986. https://digitalcommons.usu.edu/etd/4642.

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The purpose of this study was to develop a model to predict water extraction patterns and therefore salt distribution patterns in a one dimensional homogeneous soil profile for a specified root distribution . Water extraction was simulated as a function of the total potential and the root density at any level of the profile. Salt redistribution caused by irrigation was simulated by assuming a partial and proportional displacement of the water in each soil layer. A computer program was written for the model in Fortran language and implemented on the Vax. To evaluate the performance of the model

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10

Al-Himdani, Mizher. "Highway Drain Depth and Soil Stability." DigitalCommons@USU, 1987. https://digitalcommons.usu.edu/etd/4644.

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The presence of moisture in the soil reduces its shear strength. After the rain or snowmelt, the high percentage of moisture in the subgrade of highway, causes the instability resulting into failure of the highway due to high water table. Therefore, it is essential to install a drainage system to remove the excess moisture from the subgrade of highways to avoid its failure. In the present study, six different soil samples have been studied to observe its failure by triaxial shear strength and corresponding moisture content was noted. The tension applied to remove moisture was converted to equi

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11

Powell, George Erick. "Examination, application, and evaluation of geomorphic principles and resulting water quality in Midwest agricultural streams and rivers." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1148992105.

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12

Taghvaeian, Saleh. "Water and Energy Balance of a Riparian and Agricultural Ecosystem along the Lower Colorado River." DigitalCommons@USU, 2011. https://digitalcommons.usu.edu/etd/949.

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Spatially-distributed water consumption was modeled over a segment of the Lower Colorado River, which contains irrigated agricultural and Tamarisk-dominated riparian ecosystems. For the irrigation scheme, distributed evapotranspiration data were analyzed in conjunction with point measurements of precipitation and surface flow in order to close daily and annual water balance. The annual closure error was less than 1% of the total water diversion to the area. In addition, it was found that the soil water storage component of the water balance cannot be neglected if the analysis is performed o

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13

Desmond, Eric D. "Studies including hydrologic modeling and data analysis at the Ohio management systems evaluation." Columbus, Ohio : Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1070465699.

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Thesis (Ph. D.)--Ohio State University, 2003.<br>Title from first page of PDF file. Document formatted into pages; contains xvii, 104 p.; also includes graphics (some col.). Includes abstract and vita. Advisor: Andy Ward, Dept.of Food, Agricultural, and Biological Engineering. Includes bibliographical references (p. 100-104).

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14

Zwierschke, Kerry Hughes. "IMPACT OF TURFGRASS SYSTEMS ON THE NUTRIENT STATUS OF SURFACE WATER, AND GROUND WATER." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1235150457.

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15

Nyström, Jennifer, and Anwar Obeido. "Nyckelfaktorer för en förbättrad samverkan mellan markavvattningsföretag och kommuner vid stadsutveckling." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Byggnadsteknik och belysningsvetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-45650.

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Syfte: Fokus på dagvattenhantering är viktigt eftersom översvämnings- och föroreningsrisker blir allt mer förekommande på grund av klimatförändringar och urbanisering med en ökad andel hårdgjorda ytor. Vid exploatering vill kommuner utnyttja befintliga diken istället för att bygga nya ledningssystem, därmed kan de behöva samverka med markavvattningsföretag. Syftet med studien är att underlätta samarbetet mellan markavvattningsföretag och kommuner för att undvika översvämningar och föroreningar som förändring av stad och klimat kan medföra. Målet är att identifiera faktorer som kan förbättra sa

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16

D'Ambrosio, Jessica Leigh. "Perspectives on the Geomorphic Evolution and Ecology of Modified Channels and Two-Stage Ditches in the Agriculturally-Dominated Midwestern United States." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1356038774.

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17

Shedekar, Vinayak Shamrao. "Developing an integrated, multi-scale modeling system for assessing conservation benefits in subsurface drained watersheds." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1480606965301556.

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18

Gunn, Kpoti Mawutodzi. "Developing Strategies For Year-Round Spray Irrigation of Wastewater Effluent in Ohio." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1262207613.

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19

Mitsui, Kenichi. "Mechanism of fines retention and drainage with a polyacrylamidebentonite retention aid system." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=33338.

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Microparticulate retention aids, consisting of a high molecular weight polymer used in conjunction with inorganic microparticles, are widely used to improve the process colloid retention in papermaking. Such additives are generally introduced to the paper stock prior to the web formation, so that fines and fillers are flocculated and retained into the forming web. This study investigated the mechanism of fines and filler retention under the high shear typical of papermaking. Retention and drainage were optimized using the newly built Laboratory Twin Former. The variables of interest include th

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20

Dukes, Michael Dale. "Effect of Riparian Buffers and Controlled Drainageon Shallow Groundwater Quality in the North CarolinaMiddle Coastal Plain." NCSU, 2000. http://www.lib.ncsu.edu/theses/available/etd-20001115-105028.

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<p> Degradation of water quality in the streams and estuaries of North Carolina in recent years has resulted in regulations to reduce the introduction of numerous types of contaminants to this system. In the Neuse and Tar-Pamlico River Basins, excessive amounts of nitrogen have been identified as causing increased algal growth, low dissolved oxygen concentrations, and have been linked to increased growth of toxic microorganisms such as Pfiesteria piscicida. There are numerous sources of nitrogen to the basins; however, agricultural nonpoint sources have been identified as the largest contribut

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21

Ampofo, Edward Akwasi. "The use of numerical groundwater model to improve effectiveness of subsurface drainage system in irrigated field." Thesis, University of Southampton, 2009. https://eprints.soton.ac.uk/146869/.

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The research demonstrates that Three-Dimensional Variable-Density Groundwater Flow models such as the SEAWAT model can be effectively used for design of subsurface drainage systems for controlling salt concentration in the root zone on salt affected irrigated land. The SEAWAT model was used to optimize subsurface drainage design to ensure that the salt concentration of the groundwater at the base of the root zone does not exceed pre determined levels instead of the conventional approach of maintaining the groundwater at a predetermined water table level. The study was carried out on a conceptu

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22

Ekanayake, Jagath C. "Soil water movement through swelling soils." Lincoln University, 1990. http://hdl.handle.net/10182/1761.

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The present work is a contribution to description and understanding of the distribution and movement of water in swelling soils. In order to investigate the moisture distribution in swelling soils a detailed knowledge of volume change properties, flow characteristics and total potential of water in the soil is essential. Therefore, a possible volume change mechanism is first described by dividing the swelling soils into four categories and volume change of a swelling soil is measured under different overburden pressures. The measured and calculated (from volume change data) overburden potentia

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23

Bollrich, Gerhard. "Pumpstationen mit Heberauslässen - ein Beitrag zur Intensivierung der Be- und Entwässerung in der Landwirtschaft." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-112806.

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Mit der Intensivierung der landwirtschaftlichen Produktion gewinnen Pumpstationen für die Be- und Entwässerung landwirtschaftlicher Nutzflächen zunehmend an Bedeutung. Zur Beseitigung schädlicher Bodennässe werden offene Gräben oder Dränrohrleitungen angelegt, welche das Wasser bei nicht vorhandener Vorflut einem Entwässerungsschöpfwerk zuleiten. Dieses Schöpfwerk fördert das Wasser aus einem Speicherraum (Mahlbusen) in den Vorfluter. In der DDR sind zahlreiche derartige Entwässerungsschöpfwerke vorhanden. (...)

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24

Goswami, Debashish. "Analysis of flow and water quality components in drainage channels in tile drained watersheds /." 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3250249.

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Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2006.<br>Source: Dissertation Abstracts International, Volume: 68-02, Section: B, page: 1109. Adviser: Prasanta Kumar Kalita. Includes supplementary digital materials. Includes bibliographical references (leaves 144-153) Available on microfilm from Pro Quest Information and Learning.

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25

陳信瑋. "A Study on the CO2 Emissions of Ecological Engineering for Agricultural Irrigation and Drainage System." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/eewzk4.

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碩士<br>國立嘉義大學<br>土木與水資源工程學系研究所<br>107<br>Ecological engineering refers to an engineering method that utilizes ecological basis and safety guidance to reduce damages to the natural environment. It can also be applied to streams, river banks, hillsides, roads and other areas. The ecological method not only reduces the amount of steel and concrete used, but also reduces greenhouse gas emissions. This research is to investigate the two cases of Taiwan's farmland water conservancy project that has been applied to the ecological engineering method to evaluate the energy conservation and carbon reduct

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26

(5930210), Samaneh Saadat. "EVALUATION OF HYDROLOGICAL PROCESSES AND ENVIRONMENTAL IMPACTS OF FREE AND CONTROLLED SUBSURFACE DRAINAGE." Thesis, 2019.

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<p>Controlled drainage is a management strategy designed to mitigate water quality issues caused by subsurface drainage. To improve controlled drainage system management and better understand its hydrological and environmental effects, this study analyzed water table recession rate, as well as drain flow, nitrate and phosphorus loads of both free and controlled drainage systems, and simulated the hydrology of a free drainage system to evaluate surface runoff and ponding at the Davis Purdue Agricultural Center located in Eastern Indiana. </p> <p>Statistical analyses, including paired watershed

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27

(5930210), Samaneh Saadat. "Nitrate and phosphorus loads." 2019.

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<p>Daily nitrate-N, soluble reactive phosphorus and total phosphorus loads in subsurface drainage were quantified in an agricultural farm field in eastern Indiana (Davis Purdue Agricultural Center).</p> <p><b>Site description:</b> The data was collected from the field W at Davis Purdue Agricultural Center (DPAC) located in eastern Indiana. Field W is relatively flat (slope < 1%), with 0.16 km2 total area, divided into four plots, northwest (NW), southwest (SW), northeast (NE), and southeast (SE) with areas ranging from 3.5 ha to 3.7 ha. The four soil series at the site range from very poorly

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28

(5930210), Samaneh Saadat. "Time-lapse Photos." 2019.

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<div><p>Hourly photos were taken from the<b> </b>Field W located at Davis Purdue Agricultural Center (DPAC) in eastern Indiana using time-lapse cameras. These photos were taken during the daytime from four different plots that are described below. </p> <p><b>Site description:</b> Field W is relatively flat (slope < 1%), divided into four plots, northwest (NW), southwest (SW), northeast (NE), and southeast (SE) with areas ranging from 3.5 ha to 3.7 ha. Drainage in the SE and NW plots was controlled during some periods, while the SW and NE were allowed to drain freely.</p><br></div>

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29

Cuadra, Pilar E. "IMPACT OF PRECIPITATION CHARACTERISTICS IN NUTRIENT AND CARBON DELIVERY TO STREAMS IN ARTIFICIALLY DRAINED LANDSCAPES OF THE MIDWEST." Thesis, 2010. http://hdl.handle.net/1805/2060.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>Although many studies have investigated the impact of tile drainage on nitrate and pesticide export from cropland to streams, little information is known about the primary hydrological controls of tile flow response to precipitation events and its impact on N, P and C transport in artificially drained landscapes of the US Midwest. This study investigated 1) the relationship between precipitation characteristics and tile flow response at a high temporal resolution during storms; 2) the relative importance of macropore and matrix flow

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30

(8735910), Josept David Revuelta Acosta Sr. "WATER-DRIVEN EROSION PREDICTION TECHNOLOGY FOR A MORE COMPLICATED REALITY." Thesis, 2020.

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<p>Hydrological modeling has been a valuable tool to understand the processes governing water distribution, quantity, and quality of the planet Earth. Through models, one has been able to grasp processes such as runoff, soil moisture, soil erosion, subsurface drainage, plant growth, evapotranspiration, and effects of land use changes on hydrology at field and watershed scales. The number and diversity of water-related challenges are vast and expected to increase. As a result, current models need to be under continuous modifications to extend their application to more complex processes. Several

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31

Ceylan, Bilge Kagan. "Engineering applications of soil information system (sis): precision irrigation and drainage systems design." 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2737.

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The objectives of this internship were to demonstrate and apply the knowledge and technical training obtained during Doctor of Engineering coursework and to become familiar with the organizational approach to problems. These objectives were fulfilled in three commercial research and development projects in the field of precision agriculture. The first project involved optimization of a center pivot irrigation system in coordination with the system’s manufacturing company in order to apply irrigation water to maintain uniform soil water content across the field. An optimization-simulation model

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