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Dissertations / Theses on the topic 'Irrigation'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 July 2025

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1

Mohamed, Nahla Abdel-Fattah Hemdan. "Irrigation systems." Doctoral thesis, Humboldt-Universität zu Berlin, Lebenswissenschaftliche Fakultät, 2014. http://dx.doi.org/10.18452/16977.

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In der Wintersaison 2005-2006 wurde ein Split-Split Plot-Design Feldversuch mit drei Wiederholungen für jede Behandlung von Kartoffeln, als Indikatorpflanze, unter den ariden Bedingungen der Kharga Oasis in der Westlichen Wüste von Ägypten durchgeführt. Drei Bewässerungslevel (100 %, 80 %, und 60 % of ETc) mit Tröpfchenbewässerung, zwei Mulchvarianten (Zuckerrübenabfall ohne und mit 24 ton ha-1) und 4 Kompostraten (0, 12, 24, und 36 ton ha-1) wurden getestet. Generell und als Ergebnis einer Regressionsanalyse der Versuchsvarianten ohne Kompost war die beste Variante die Tröpfchenbewässerung be
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2

Martin, E. C., R. Wegge, and M. Sheedy. "Effects of High Frequency Irrigation on Irrigation Uniformity II." College of Agriculture, University of Arizona (Tucson, AZ), 2000. http://hdl.handle.net/10150/197490.

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Another year of data was collected to determine the effects of high frequency irrigation on irrigation uniformity in cotton production. A field located at the Marana Agricultural Center was split into two treatments. Treatment one was irrigated at approximately 35% depletion of available water in the plant rootzone. Treatment two was irrigated at approximately 65% depletion in the crop rootzone. Increased frequency of irrigation has shown improved yields in many cotton studies. However, these more frequent and lighter irrigation applications may cause problems with irrigation uniformity. Frequ
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3

Martin, E. C., G. Laine, and M. Sheedy. "Effects of High Frequency Irrigation on Irrigation Uniformity III." College of Agriculture, University of Arizona (Tucson, AZ), 2001. http://hdl.handle.net/10150/211315.

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Data was collected for a third season to determine the effects of high frequency irrigation on irrigation uniformity in cotton production. The past two seasons indicated that high frequency irrigation worked better on sandier soils than soils containing high clay contents. Although no significant differences were found, higher yields were obtained on a site with a relatively high sand content. A field located at the Maricopa Agricultural Center was split into two treatments. Treatment 1 was irrigated at approximately 35% depletion of available water in the plant rootzone. Treatment 2 was irrig
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4

Andriyas, Sanyogita. "Analysis of Irrigation Decision Behavior and Forecasting Future Irrigation Decisions." DigitalCommons@USU, 2012. https://digitalcommons.usu.edu/etd/1359.

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Farmers play a pivotal role in food production. To be economically successful, farmers must make many decisions during the course of a growing season about the allocation of inputs to production. For farmers in arid regions, one of these decisions is whether to irrigate. This research is the first of its kind to investigate the reasons that drive a farmer to make irrigation decisions and use those reasons/factors to forecast future irrigation decisions. This study can help water managers and canal operators to estimate short-term irrigation demands, thereby gaining information that might be us
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5

Brown, Peter Derek. "Optimal irrigation scheduling." Thesis, University of Canterbury. Civil and Natural Resources Engineering, 2008. http://hdl.handle.net/10092/1255.

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An optimal stochastic multi-crop irrigation scheduling algorithm was developed which was able to incorporate complex farm system models, and constraints on daily and seasonal water use, with the objective of maximising farm profit. This scheduling method included a complex farm simulation model in the objective function, used decision variables to describe general management decisions, and used a custom heuristic method for optimisation. Existing optimal schedulers generally use stochastic dynamic programming which relies on time independence of all parameters except state variables, thereby r
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6

Kamwamba-Mtethiwa, Jean Tiyamika. "Sustainable irrigation development : the adoption of small-scale pumped irrigation in Malawi." Thesis, Cranfield University, 2016. http://dspace.lib.cranfield.ac.uk/handle/1826/10005.

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There has been an increased interest on small-scale pumped irrigation (SSPI) in Sub Saharan Africa (SSA), however little is known on the adoption processes behind this technology. Moreover, the conditions for successful SSPI adoption remain largely unexplored. This research aims to achieve a deeper understanding of the present adoption processes to inform future policy. The thesis was framed around the diffusion of innovations model (Rogers 2003), using the systematic review methodology and field surveys. Interviews involving 212 farmers and 25 other stakeholders were conducted between 2013 an
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7

Darouich, Hanaa. "Multicriteria analysis for irrigation sustainable development: design and selection of irrigation systems." Doctoral thesis, ISA/UL, 2014. http://hdl.handle.net/10400.5/7340.

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Doutoramento em Engenharia dos Biossistemas - Instituto Superior de Agronomia<br>This study aimed to select the most sustainable irrigation methods able to obtain high water productivity considering economic aspects and water saving criteria for wheat and cotton in NE Syria. The models used are PROASPER for sprinkler, SADREG for surface and MIRRIG for drip irrigation. Multicriteria analysis (MCA) was used to rank a set of design alternatives considering water saving and economic priorities. For wheat, surface and sprinkler systems were applied. For cotton surface, sprinkler and drip methods we
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8

Young, Lauren. "Irrigation Methods and Their Effects on Irrigation Water Efficiency in High Tunnels." Thesis, University of North Texas, 2019. https://digital.library.unt.edu/ark:/67531/metadc1609101/.

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Improving water efficiency is and will continue to be a top concern to meet the world food production demands for a growing population. By having a clear understanding of water efficiencies, communities will be able to address these concerns from an economic standpoint and use more productive methods to grow food and limit water consumption. This study examines the water efficiencies of three irrigation methods over a single growing season in southeastern Oklahoma. Two crops, tomatoes and cucumbers, were grown using drip irrigation, a self-wicking container, and a non-circulating hydroponics b
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9

Scherer, T., D. Slack, J. Watson, and F. Fox. "Comparison of Three Irrigation Scheduling Methods and Evaluation of Irrigation Leaching Characteristics." College of Agriculture, University of Arizona (Tucson, AZ), 1989. http://hdl.handle.net/10150/204858.

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Three methods were used to schedule irrigations on replicated plots at the Maricopa Ag Center using DPL 90 cotton. The three methods were: a soil water balance model based on historic consumptive use curves, a soil water balance model based on the Modified Penman Equation and daily weather (AZMET), and infrared thermometry using the C.W.S.I. A potassium-bromide conservative tracer was applied at selected sites in the plots to evaluate leaching characteristics. The irrigation scheduling test was duplicated at the Safford Experiment Station and is presented in another report. Results from the 19
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10

Scherer, T., D. Slack, J. Watson, and F. Fox. "Comparison of Three Irrigation Scheduling Methods and Evaluation of Irrigation Leaching Characteristics." College of Agriculture, University of Arizona (Tucson, AZ), 1990. http://hdl.handle.net/10150/208305.

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Three methods were used to schedule irrigations during 1989 on replicated plots at the Maricopa Ag Center using DPL 90 cotton. This is a continuation of the research initiated in 1988 using the same field The three methods were; a soil water balance model based on historic consumptive use curves, a soil water balance model based on the Modified Penman Equation and daily weather (AZMET), and infrared thermometry using the C.W.S.I. A potassium- bromide conservative tracer was applied at selected sites in the plots to evaluate leaching characteristics. The irrigation scheduling test was again dup
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11

Scherer, Tom, Don Slack, Jack Watson, and Fred Fox. "Comparison of Three Irrigation Scheduling Methods and Evaluation of Irrigation Leaching Characteristics." College of Agriculture, University of Arizona (Tucson, AZ), 1991. http://hdl.handle.net/10150/208344.

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Three methods were used to schedule irrigations during the 1990 growing season on replicated plots at the Maricopa Ag Center using DPL 90 cotton. This is the final report of the research initiated in 1988. The three methods were: a soil water balance model based on historic consumptive use curves (ERIE), a soil water balance model (AZSCHED) based on the Modified Penman Equation and daily weather (AZMET), and infrared thermometry using the Crop Water Stress Index (CWSI). A potassium- bromide conservative tracer was applied at selected sites in the plots to evaluate leaching characteristics. The
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12

Bernot, Marc. "Transport optimal et irrigation." Phd thesis, École normale supérieure de Cachan - ENS Cachan, 2005. http://tel.archives-ouvertes.fr/tel-00132078.

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L'objet de cette thèse est de modéliser et d'étudier des structures d'irrigation telles les nervures des feuilles, réseau sanguin, poumons,etc. Un modèle généralisant le problème de Gilbert Steiner est introduit ; on étudie alors les propriétés d'existence, de stabilité et régularité. Des algorithmes sont alors proposés pour la simulation.
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13

Galganov, Yvonne T. (Yvonne Tamara). "Subsurface irrigation of soybean." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=70168.

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A field experiment was conducted on a homogeneous sandy soil and a layered soil of southern Quebec from 1988 to 1990. This was done in order to evaluate the yield response of indeterminate soybean to subsurface irrigation and to determine the performance of subsurface irrigation in a layered soil. It was found that indeterminate soybean varieties increase their yield by approximately 30% for two out of three years. Soybean are very sensitive to competition between themselves as well as with weeds. This sensitivity is increased during subsurface irrigation. Weeds were more prominent in the irri
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14

Call, Robert, and Cado Daily. "Drip Irrigation: The Basics." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2006. http://hdl.handle.net/10150/144820.

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2 pp.<br>Drip irrigation is the slow, measured application of waer through devices called emitters. Now a wide variety of quality products has been developed to make drip irrigation reliable and easy.
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15

Ottman, M. J., and B. R. Tickes. "Alfalfa Irrigation Termination, Yuma." College of Agriculture, University of Arizona (Tucson, AZ), 1994. http://hdl.handle.net/10150/201407.

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Alfalfa irrigation is often withheld as a water conservation measure in Arizona. The objective of this research was to test the hypothesis that alfalfa yield and stand can be permanently damaged by withholding irrigation water. Irrigation was terminated during the summer (July through October) or winter (November through February) on a Superstition sand in Yuma. Summer irrigation termination reduced plant density from 4 to 1.5 plants per square foot and reduced hay yield from 0.76 to 0.27 tons per acre per cutting after irrigation was resumed. Winter irrigation termination had no residual effe
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16

Ottman, M. J., and R. L. Roth. "Alfalfa Irrigation Termination, Maricopa." College of Agriculture, University of Arizona (Tucson, AZ), 1994. http://hdl.handle.net/10150/201408.

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Alfalfa irrigation is often withheld as a water conservation measure in Arizona. The objective of this research was to test the hypothesis that alfalfa can be permanently damaged by withholding irrigation water. Irrigation was terminated during the summer (July or August through September) or summer through winter (July or August through mid -March) on a Casa Grande sandy loam at Maricopa. Irrigation termination at Maricopa was not detrimental to stand although hay yields were depressed from 1.47 to 1.28 tons per acre following the second cycle of summer irrigation termination and from 1.57 to
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17

Fox, Fred Andrew 1956. "Irrigation scheduling decision support." Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/288770.

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Irrigation scheduling using the soil water balance approach has been recommended to irrigators for many years. Reasonably good results are normally obtained by researchers using carefully quantified inputs. Irrigators in production agriculture may estimate inputs and then question the validity of the method when the irrigation recommendations conflict with present irrigation schedules. By associating each input with an interval representing possible bias based on the way the input was estimated, and solving the irrigation scheduling model using the intervals as inputs, the output was associate
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18

Fernandes, Samuel Lucas. "Avaliação da efetividade de diferentes protocolos de irrigação na limpeza do canal radicular." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/25/25147/tde-24112015-154911/.

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O objetivo desse estudo foi avaliar a capacidade de dissolução e remoção de biofilme formado in situ, na remoção de smear layer e debris empregando dez protocolos de irrigação final (solução fisiológica com ou sem agitação ultrassônica; ou hipoclorito de sódio como irrigante primário, seguido de solução salina, ou EDTA 17%, ou ácido peracético (PAA) 2%, ou Qmix, com ou sem agitação ultrassônica de ambas as soluções). Duzentos e trinta raízes bovinas foram seccionadas e cortadas com 15mm de comprimento e instrumentadas com o instrumento Reciproc R50. Para a análise da remoção de debris e smear
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19

Begmatova, Anjela. "Irrigation system cost comparison model." Online access for everyone, 2008. http://www.dissertations.wsu.edu/Thesis/Summer2008/A_Begmatova_080508.pdf.

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20

Chitsa, Gilbert. "Analysis of entrepreneurial behaviour of smallholder irrigation farmers: empirical evidence from Qamata Irrigation scheme." Thesis, University of Fort Hare, 2014. http://hdl.handle.net/10353/d1019769.

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Albeit much effort having been put to review the performance trend of smallholder irrigation farmers in South Africa. However, there seems to be a paucity of information regarding the level of entrepreneurship on these farmers. Most research works on smallholder irrigation farmers have mainly focused on livelihoods trajectory providing a review on how the welfare of the rural poor has been transformed after the introduction of irrigation schemes. With most research evidence indicating a high degree of underperformance on most smallholder irrigation schemes, this research attempted to investiga
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21

Karlberg, Louise. "Irrigation with saline water using low-cost drip-irrigation systems in sub-Saharan Africa." Doctoral thesis, Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-209.

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22

Goodman, Ryan. "Wi-fi evapotranspiration irrigation controller." Click here to view, 2010. http://digitalcommons.calpoly.edu/eesp/22/.

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Thesis (B.S.)--California Polytechnic State University, 2010.<br>Project advisor: James Harris. Title from PDF title page; viewed on Apr. 19, 2010. Includes bibliographical references. Also available on microfiche.
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23

De, Vries Tonny Tessa. "Irrigation scheduling with integer programming." Thesis, University of Southampton, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273891.

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24

Hermansson, Hanna, and Louise Lundblad. "Automatic irrigation system for plants." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-264445.

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The purpose of this project was to develop an automatic irrigation system for plants. It is beneficial to have plants indoors. In addition to their air-purifying qualities, they have been proven to increase the productivity of employees at workplaces, as well as decrease the amount of sick leave. Three research question were investigated: how much energy the system requires and if it is possible to replace the energy source with an alternative energy source, how well the system stabilises and how a wireless regulation can be implemented. The final design consisted of a mictrocontroller which c
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25

Farr, C. R. "Salinity Distribution Under Drip Irrigation." College of Agriculture, University of Arizona (Tucson, AZ), 1985. http://hdl.handle.net/10150/204075.

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26

Farr, C. R. "Comparison of Increased Irrigation Frequency." College of Agriculture, University of Arizona (Tucson, AZ), 1987. http://hdl.handle.net/10150/204486.

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27

Roth, R. L., and B. R. Gardner. "Vegetable Research Under Sprinkler Irrigation." College of Agriculture, University of Arizona (Tucson, AZ), 1986. http://hdl.handle.net/10150/214110.

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28

Gardner, B. R., and R. L. Roth. "Asparagus Production Under Sprinkler Irrigation." College of Agriculture, University of Arizona (Tucson, AZ), 1986. http://hdl.handle.net/10150/214133.

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29

Farr, C. R. "Planting Patterns Under Drip Irrigation." College of Agriculture, University of Arizona (Tucson, AZ), 1986. http://hdl.handle.net/10150/219749.

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The 1985 and 1986 Cotton Reports have the same publication and P-Series numbers.<br>Planting pattern 2x1 skip row cotton outyielded variable row 32"x44" per gross field acre under drip irrigation with saline water. Skip row planting in deep water areas appears to be a feasible selection with high water cost, reduced tubing requirement, lowered land rentals and increased yield response.
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Kingdon, Lorraine B. "Double Duty for Irrigation Water." College of Agriculture, University of Arizona (Tucson, AZ), 1990. http://hdl.handle.net/10150/295634.

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31

Maluka, Pretty Mabel. "Rural livelihoods and agricultural production in smallholder irrigation schemes: The case of Hoxane Irrigation scheme." University of the Western Cape, 2017. http://hdl.handle.net/11394/5931.

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Magister Philosophiae - MPhil (LAS) (Land and Agrarian Studies)<br>This mini-thesis explores rural livelihoods and agricultural production in smallholder irrigation schemes in South Africa. The study sought to determine the livelihoods of plot-holders and the various production practices employed by the farmers in Hoxane Irrigation Scheme in Mpumalanga Province. The overall objective is to contribute to the literature on government's smallholder irrigation scheme revitalization programme and the types of support required by plot-holders in order to take advantage of the opportunities that
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32

White, Simon Charles. "Partial rootzone drying and deficit irrigation in cotton for use under large mobile irrigation machines." University of Southern Queensland, Faculty of Engineering and Surveying, 2007. http://eprints.usq.edu.au/archive/00004778/.

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[Abstract]: There is currently a shortage of irrigation water available for cotton production in Australia due to recent climatic and legislative conditions. Some growers have responded to this water shortage by changing from traditional furrow irrigation to alternative irrigation systems such as centre pivots and lateral move irrigations(collectively known as large mobile irrigation machines – LMIMs). Improved efficiency of irrigation application, as well as labour savings, have been the main reasons for the increased adoption of LMIMs. The use of LMIMs also enables a higher level of control
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33

Geremew, Eticha Birdo. "Modelling the soil water balance to improve irrigation management of traditional irrigation schemes in Ethiopia." Pretoria : [s.n.], 2008. http://upetd.up.ac.za/thesis/available/etd-05242009-121531.

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34

Ngaidé, Tidiane. "Socio-economic implications of irrigation systems in Mauritania the Boghé and Foum-Gleita irrigation projects /." [Madison : s.n.], 1986. http://catalog.hathitrust.org/api/volumes/oclc/15113431.html.

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35

Kazemi, Hossein V. "Estimating crop water requirements in south-central Kansas." Thesis, Kansas State University, 1985. http://hdl.handle.net/2097/9859.

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36

Patterson, Michelle M. "Irrigation and climate effects on selenium in the Kendrick Irrigation District, WY, and a bioremediation strategy." Laramie, Wyo. : University of Wyoming, 2009. http://proquest.umi.com/pqdweb?did=1992120371&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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37

Derbala, Asaad Abdelkader Abdalla [Verfasser]. "Development and evaluation of mobile drip irrigation with center pivot irrigation machines / Asaad Abdelkader Abdalla Derbala." Braunschweig : Bundesforschungsanst. für Landwirtschaft, 2003. http://d-nb.info/996797408/34.

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38

El, Chami Daniel <1979&gt. "Irrigation water management and policy on farm decision: The case study of the RENANA irrigation board." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/3135/1/Final_Thesis.pdf.

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El, Chami Daniel <1979&gt. "Irrigation water management and policy on farm decision: The case study of the RENANA irrigation board." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/3135/.

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40

Nicol, Lorraine, and University of Lethbridge Faculty of Arts and Science. "Irrigation water markets in Southern Alberta." Thesis, Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 2005, 2005. http://hdl.handle.net/10133/275.

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Irrigation is central to the functioning of the southern Alberta economy. Irrigation also uses a significant amount of what is expected to be an increasingly scarce resource: water. The Alberta government is embarking on a long-term water management strategy in which irrigation water management will be pivotal. The government is considering a range of economic instruments to assist in this management. One instrument already implemented is the ability of private irrigators and irrigators within irrigation districts to trade irrigation water rights on a temporary and permanent basis. This has es
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Agodzo, Sampson Kwaku. "Trickle irrigation using porous clay pot." Thesis, University of Newcastle Upon Tyne, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.331989.

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Dvorak, Gary John. "Economic analysis of irrigation pumping plants." Thesis, Kansas State University, 1985. http://hdl.handle.net/2097/9834.

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Kuntz, Lauren B. "Wick irrigation systems for subsistence farming." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/83726.

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Thesis (S.B.)--Massachusetts Institute of Technology, Department of Mechanical Engineering, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 59-61).<br>Irrigation on small-scale farms has been noted as a key method to help lift subsistence farmers out of poverty. With water scarity growing around the globe and lack of access to electricity still prevalent in rural areas, the need to develop an energy efficient irrigation system that simultaneous limits wasted water while being low cost is essential. The possibility of using a wicking irrigation syste
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Siddeek, Fathima Zeena. "Water management for lowland rice irrigation." Diss., Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/71183.

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A procedure was developed to estimate optimum irrigation requirements for lowland rice cultivation in Southeast Asia. The procedure uses a water balance equation of semi-stochastic nature to maintain minimum desired water depths in paddy fields at the end of each irrigation period. The procedure estimates weekly pan evaporation (EV) and rainfall (RF) at different probability levels, which is then used to determine weekly irrigation requirements at different probability levels. To illustrate the use of the method, the Kalawewa irrigation scheme in Sri Lanka was selected for demonstration purp
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Raza, Khalil. "Experimental Assessment of Photovoltaic Irrigation System." Wright State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=wright1411072971.

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46

Rutland, Daniel C. "Evapotranspiration-based irrigation controllers in Florida." [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0041310.

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47

Holbrook, Gregory Martin. "The structure of an irrigation scheme." Thesis, Rhodes University, 1993. http://hdl.handle.net/10962/d1002664.

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Faced with problems related to the sustainability and advisability of contemporary irrigation development in Africa, anthropologists have increasingly looked to economic and political explanations for the success or failure of those development schemes. Instead of seeking explanations in these isolated areas, this thesis has argued that irrigation development needs to be understood through relationships within and between politics, economics, social structure and culture. In order to uncover those interactions with regard to the Tyefu Irrigation Scheme in the southern African homeland of Ciske
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Mukherjee, Sushmita. "Integrated irrigation management model for deficit irrigation." Thesis, 2013. http://localhost:8080/iit/handle/2074/6588.

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49

Hung, Chi-Chih, and 洪啓智. "Irrigation Efficiency Assessment of Furrow and Flooding Irrigations in Paddy Fields." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/55117710720820219673.

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碩士<br>國立屏東科技大學<br>土木工程系所<br>102<br>Rice is one of the main crops cultivated in Taiwan, accounting for the majority cultivate area. The planted rice will increase water consumption following growing process. If the rice planting process can effectively reduce the amount of water consumption that can effectively improve the efficiency of agricultural water utilization. In this study, a sand box and a 3 m #westeur024# 5 m lysimeter, located in Irrigation Promotion Center, Taiwan Chia-Nan Irrigation Association, were tested for water saving efficiency of rice consumption. In field two irrigation m
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Chuang, Chun-Fang, and 莊淳芳. "Application of Cluster Analysis on Irrigation Performance of Irrigation Associations." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/62674457676201185271.

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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>95<br>Though the mean rainfall at Taiwan reaches to 2515mm per year, but the water shortage seems to be the most troublesome problem due to the unpredictable pattern both on temporal and spatial distribution. Agricultural water occupies more than half of the total usable water at Taiwan, 71% of annual rainfall assigned to the agricultural sector at 2005 is the typical figure. The water demand increases gradually, due to the rapidly growth at population, economical activities and industrial reforming. Irrigation efficiency then becomes a very important issue to
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