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Tesi sul tema "Irrigation efficiency"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

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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2

Sedibe, Moosa Mahmood. "Optimising water use efficiency for crop production." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/53541.

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Thesis (MScAgric)--University of Stellenbosch, 2003.<br>ENGLISH ABSTRACT: Poor water management and poor water use efficiency (WUE) have been identified as one of the major problems experienced by vegetable growers in most of the developing countries, including South Africa. This poor management and poor utilization of water have led to a drastic decline in the quality and quantity of available water. In South Africa agriculture uses about 50% of available water. Increasing water demand for domestic, industrial and mining uses, may decrease agriculture's share to less than the current 5

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3

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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4

Stevens, Joseph Benjamin. "Adoption of irrigation scheduling methods in South Africa." Pretoria : [s.n.], 2006. http://upetd.up.ac.za/thesis/available/etd-05162007-173724.

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5

Nickerson, Joel. "The Role of Knowledge and Attitude in Residential Irrigation Efficiency." Thesis, University of North Texas, 2012. https://digital.library.unt.edu/ark:/67531/metadc149645/.

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Residential irrigation efficiency is a long-term concern for any community that faces water supply stress. When ability to raise water prices is constrained, public education and conservation programs can produce reduced water usage. Understanding the factors behind residential irrigation efficiency allows the design of more effective conservation campaigns. Combining site-specific water budgets with usage data for four hundred homes in North Texas enables quantifying efficient irrigation behavior. A survey of homeowners tests for the presence of conservation-positive attitudes and the knowled

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6

Lacey, Timothy R. "Improving irrigation efficiency : raingun performance in field scale vegetable production." Thesis, Cranfield University, 2006. http://dspace.lib.cranfield.ac.uk/handle/1826/11407.

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In England and Wales, rising demands on water resources and competition between sectors is leading to increased pressure on field vegetable growers to irrigate more efficiently. Approximately 40,000ha of field scale vegetables are irrigated in England and Wales in a dry year. Between 60% and 90% of this area is estimated to be irrigated using hose-reels fitted with rainguns. However, despite their popularity, these systems are inherently non-uniform in water distribution, particularly in windy conditions. Improving their application uniformity has therefore been identified as one of the most p

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7

Alazba, Abdulrahman Ali. "Efficiency of irrigation borders as affected by inflow hydrograph shape." Diss., The University of Arizona, 1994. http://hdl.handle.net/10150/186677.

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The objective of this study was to determine how border irrigation performance is affected by inflow hydrograph shape. Sloping borders with open end boundary condition were selected for the study. A computer program called SRFR was used for simulations with the choice of zero inertia model as the mathematical model describing the movement of water along the border run. Five inflow hydrograph shapes were chosen from over fifteen shapes for evaluation. They are named as follows: constant (CON), cutback (CB), cablegation (CG), modified cutback (MCB), and modified cablegation (MCG). Different rang

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8

Eustice, Tarryn. "Efficiency of irrigation practices for table grapes in the Hex River Valley." Thesis, Link to the online version, 2008. http://hdl.handle.net/10019/835.

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9

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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10

Munyinda, Kalaluka. "Efficiency of water and nitrogen use by wheat and legumes in Zambia." Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=75446.

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Maximum wheat (Triticum aestivum L.) yields in Zambia were obtained with weekly irrigation at 85% of class A pan evaporation during the whole irrigation interval and split application of urea N of which the initial portion of the fertilizer was either broadcast and incorporated or broadcast after the crop had established itself. This corresponded with maximum utilization of fertilizer N. The proportion of N derived from fertilizer was independent of fertilizer placement at various water regimes and N utilization was primarily a function of water availability.<br>Two nonnodulating soybean (Glyc

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11

McGinley, Susan. "Irrigation Efficiency for Durum Wheat: Growing Pasta Wheat and Barley in Arizona." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2003. http://hdl.handle.net/10150/622226.

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12

Pérez, Sánchez Modesto. "METHODOLOGY FOR ENERGY EFFICIENCY IMPROVEMENT ANALYSIS IN PRESSURIZED IRRIGATION NETWORKS. PRACTICAL APPLICATION." Doctoral thesis, Universitat Politècnica de València, 2018. http://hdl.handle.net/10251/84012.

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Analyses of possible synergies between energy recovery and water management are essential for achieving sustainable improvements in the performance of pressurized irrigation networks. Improving the energy efficiency of water systems by hydraulic energy recovery is becoming an inevitable trend for energy conservation, emissions reduction, and increases in profit margins. This Ph.D. research is focused on the proposal and development of an optimization methodology that improves energy efficiency in pressurized irrigation networks. To develop this methodology, the main objective of this Ph.D. th

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13

Bousso, Abou Elimane 1952. "Irrigation water use efficiency of crop calorie and protein production in Arizona." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/191991.

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Irrigation water use efficiencies were studied for the State of Arizona in terms of nutritive values such as calories and proteins. The major crops and crop groups, 15 counties, 6 water planning districts, and four irrigation systems were evaluated. Cotton accounted for more than 40 percent of the Statewide total protein production. The most efficient calorie producing crop was potatoe. The feed crops produced the highest percentage of protein. On yield per acre basis, the leading counties were La Paz and Yuma. District IV produced the highest calorie and protein both per acre and acre-foot ba

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14

Ottman, Michael J. "Water Use Efficiency of Forage Sorghum Grown with Sub-optimal Irrigation, 2009." College of Agriculture, University of Arizona (Tucson, AZ), 2010. http://hdl.handle.net/10150/203773.

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A forage sorghum irrigation study was conducted at Maricopa, AZ to determine water use and if sub-optimal irrigation increases water use efficiency and profitability. Sorghum was planted on July 10 with a row spacing of 40 inches and irrigated three times with a total of 8.7 inches of water to establish the crop. Variable amounts of irrigation water were applied commencing on Aug 12 based on 25, 50, 75, and 100% of estimated crop water use (evapotranspiration, ET). The plots were 53.3 ft wide (16 rows) and 40 ft long. ET was estimated from soil water measurements using a neutron probe. The tot

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15

Nthai, Mukovhe Maureen. "An evaluation of irrigation water supply infrastructure to improve conveyance efficiency and water availability at Dzindi Irrigation Scheme, Limpopo Province." Diss., Pretoria ; [s.n.], 2007. http://upetd.up.ac.za/thesis/available/etd-09142007-162859.

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16

Du, Toit Petrus Gerhardus. "The effect of partial rootzone drying on the partitioning of dry matter, carbon, nitrogen and inorganic ions of grapevines." Title page, summary and table of contents only, 2005. http://hdl.handle.net/2440/37954.

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Partial rootzone drying (PRD) is an irrigation management technique designed to reduce water use in grapevines without a decline in yield, thereby increasing water–use efficiency (measured as t/ML) (WUE). The principle of PRD is to keep part of the root system at a constant drying rate to produce soil-derived signals to above–ground plant organs to induce a physiological response. Major PRD effects include a reduced canopy size and greatly increased WUE with possible improvements in fruit quality. Although we have a good understanding of the hormonal physiology of PRD, little is known on the e

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17

Perera, Kevin. "The Resource Efficiency Paradox : A Case Study of the Guerdane Irrigation Project in Morocco." Thesis, Uppsala universitet, Statsvetenskapliga institutionen, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-414629.

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How can we explain the paradoxical outcomes of resource efficiency? As a key pillar of worldwide sustainable development policies, the concept of resource efficiency has become increasingly important to scrutinize. The overreliance on efficiency coupled with the intention of conserving scarce resources can sometimes backfire. Understanding the intermediate process that leads to the negative, paradoxical outcome is imperative for a sustainable future, especially for societies that risks resource degradation. This study takes the explanatory route and aims to problematize the usage of efficient

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18

Esfandiari, Baiat Mansour, of Western Sydney Hawkesbury University, of Science Technology and Agriculture Faculty, and School of Agriculture and Rural Development. "Evaluation of furrow irrigation models for south-east Australia." THESIS_FSTA_ARD_EsfandiariBaiat_M.xml, 1997. http://handle.uws.edu.au:8081/1959.7/739.

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The overall objective of this study was to evaluate the performance of selected furrow irrigation models for field conditions in south-east Australia. The other important aspects which were examined during this study include: developing a methodology for estimating of infiltrating characteristics, assessing the applicability of the Manning and other similar equations for flows in furrow irrigation, investigating the variation of shape factor during irrigation developing methodology for estimation of recession time and exploring the sensitivity of the models to the input parameters. Field exper

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19

Reis, André Fróes de Borja. "Rice performance, water and nitrogen efficiency in different irrigation regimes in tropical lowland." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/11/11136/tde-02102017-095946/.

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Rice (Oryza sativa L.) crop has an important role to attend the food demand of a growing world population, and the production increment will come not just from increasing efficiency in the current cropland, but also from expansion to new areas. The tropical lowland plains of northern Brazil are already being converted to rice production, although the lack of scientific knowledge and agricultural practices suited local conditions. This region presents soils with weathered clays with distinct properties from those grown in traditional rice regions, and deploying agricultural practices developed

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20

Ogola, J. B. Ochanda. "Improving water use efficiency of maize through proper nitrogen management." Thesis, University of Reading, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340024.

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21

Nyambo, Patrick. "Water footprint of growing vegetables in selected smallholder irrigation schemes in South Africa." Thesis, University of Fort Hare, 2014. http://hdl.handle.net/10353/d1019775.

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Knowledge of water use, through water foot printing (WF) in smallholder agriculture crop production is the key to the global fight against poverty, achievement of food security and sustainability within the world’s rural community. Water footprint of a crop can be defined as the volume of fresh water used to produce a certain crop in all the steps in the production line. This study, therefore aimed at contributing towards improvements in rural livelihoods by raising awareness of the increased productive use of green, blue and grey water in smallholder agriculture in South Africa. This was done

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22

Lamack, William F. "Spray stake irrigation of container-grown plants." Thesis, Virginia Tech, 1992. http://hdl.handle.net/10919/40645.

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<p>Studies were conducted to evaluate the effect of pre-irrigation media moisture deficit, irrigation application rate, and intermittent irrigation on irrigation efficiency [(amount applied - amount leached) amount applied' 100] of spray stake-irrigated, container-grown plants. In the first experiment, pine bark-filled containers were irrigated to replace moisture deficits of 600, 1200, or 1800 ml. Deficits were returned in single, continuous applications at application rates of 148, 220, and 270 ml/min. Application rate did not affect irrigation efficiency. Efficiency decreased with increase

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23

Hoskins, Tyler Courtney. "Water and nutrient transport dynamics during the irrigation of containerized nursery crops." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/48165.

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Increased water- and fertilizer-use-efficiency in containerized crop production, via reduced water loss, enhances crop-available nutrients while reducing non-point source agrichemical contributions in accordance with regulatory standards. Previous studies detailed nutrient leaching patterns throughout crop production seasons, leaving little known about water and dissolved nutrient (solute) movement through soilless substrates during irrigation. The following experiments evaluated fundamental water and solute transport principles through pine-bark based substrates. 1) Ilex crenata Thunb. 'Benne

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24

Taylor, Katherine Anne. "Reducing the power required for irrigation : designing low-pressure, pressure-compensating drip irrigation emitters and high efficiency solar-powered pumps for emerging markets." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/100350.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 81-86).<br>This thesis presents a mathematical model investigating the physics behind pressure compensating (PC) drip irrigation emitters and a design of a highly efficient solar powered centrifugal pump for small-acreage farmers drawing from shallow groundwater. The global community is facing a worsening crisis with regards to the water-energy agriculture nexus. Irrigation is a proven way to increase the agricul

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25

Adeniyi, Daniel Adeoluwa Seun. "Sustainable irrigation agriculture for food security and poverty reduction among smallholder farmers in Northern Nigeria." University of the Western Cape, 2019. http://hdl.handle.net/11394/6688.

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Philosophiae Doctor - PhD<br>Nigeria, like many African countries is caught up in the uncertainty of the effectiveness of agricultural intervention in achieving food security, poverty reduction and improved quality of life. This ambiguity is more pronounced especially in rural areas where majority of the poor and those involved in agriculture reside. Indeed, issues relating to resource utilization and productivity in the agricultural sector and how they affect livelihoods and food security of smallholder households remain underexplored. The study examines the contribution of small-scale i

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26

Nauditt, Alexandra. "Understanding stream flow generation in sparsely monitored montane catchments." Thesis, University of Aberdeen, 2017. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=233935.

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27

Cakir, Metin. "A Stochastic Parametric Analysis of the Efficiency Effects of Technical Change: The Rehabilitation of Irrigation Schemes in Mali." Fogler Library, University of Maine, 2005. http://www.library.umaine.edu/theses/pdf/CakirM2005.pdf.

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28

Quintana, Ashwell Nicolas Efrain. "Essays on optimal extraction of groundwater in Western Kansas." Diss., Kansas State University, 2017. http://hdl.handle.net/2097/38153.

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Doctor of Philosophy<br>Department of Agricultural Economics<br>Jeffrey M. Peterson<br>Nathan P. Hendricks<br>The two studies presented in this dissertation examine incentives for groundwater extraction and their resulting effect on aquifer depletion. Both studies apply dynamic optimization methods in a context of irrigated agriculture in arid and semi-arid regions such as in western Kansas. The first study examines the effects of capital subsidies aimed at increasing irrigation application efficiency. The second study examines the effects of changing incentives posed by changes in climatic pa

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29

Almeida, Alex Nunes de. "Dimensionamento do sistema de Irrigação por Gotejamento Móvel (IRGMO): metodologia de cálculo e software." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/11/11152/tde-23092016-184743/.

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Com a necessidade de se promover o uso eficiente da água na agricultura, aprimoramentos e novos desenvolvimentos em equipamentos de irrigação são sempre bem-vindos. Um sistema de irrigação por gotejamento móvel (IRGMO), trata-se da união entre a irrigação por pivô central (irrigação por aspersão) e a irrigação por gotejamento (irrigação localizada). O sistema é constituído por tubos de descida que unem a linha principal do pivô central (aço zincado) com as linhas gotejadoras (polietileno). A vazão em cada ponto de derivação do pivô é calculada em função da vazão dos gotejadores e do número de

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30

Collins, Marisa Jain. "Physiological responses of field grown shiraz grapevines to partial rootzone drying and deficit irrigation /." Connect to thesis, 2006. http://eprints.unimelb.edu.au/archive/00002801.

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31

Cobb, Chester Ray. "Estimating Nitrogen Efficiency of Swine Lagoon Liquid Applied to Field Crops Using Continuously Variable Irrigation." NCSU, 2002. http://www.lib.ncsu.edu/theses/available/etd-05082002-125033/.

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Application of anaerobic swine (Sus scrofa domesticus) lagoon liquid onto cropland by irrigation is a common method of waste disposal and treatment. Currently, the application rate of swine lagoon liquid is based on the N concentration of the lagoon liqu id and the N required by the receiver crop to obtain a realistic yield. In North Carolina, only 50% of the total N in the swine lagoon liquid applied by irrigation is considered available for plant use during the first year after application. Uncertaint y exists as to whether this coefficient accurately predicts the amount of plant-available N

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Zakikhani, Hamed. "Assessing soil nitrogen dynamics in Vertosols cropped to cotton in subtropical Australia." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/211433/1/Hamed_Zakikhani_Thesis.pdf.

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This project assessed the contribution of Vertosols to the nitrogen supply of cotton in Darling Downs region, Australia. Two years of nitrogen dynamics measurements throughout the soil profile under field and laboratory conditions demonstrated that, on average, 87 per cent of nitrogen was supplied by the soil to the cotton crop. This research provides a practical framework for establishing a sustainable nitrogen management strategy to enable efficient use of nitrogen in irrigated cotton production. The results of this research are potentially applicable to similarly managed cropping systems in

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Breytenbach, Adell. "The market potential for the floppy sprinkler irrigation system in the global agricultural sector." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/21378.

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Thesis (MBA)--Stellenbosch University, 2012.<br>This research study analyses the market potential for the Floppy Sprinkler irrigation system in the global market. It explores the global irrigation market and its environment to identify the driving forces that influence the industry as well as the potential that Floppy Sprinkler could unleash as a competitor. The researcher assesses the industry value chain to determine the fit and alliance opportunities for Floppy Sprinkler in the value chain. The study further analyses the competitive pressures influencing the competitive environment. Applie

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Brown, Paul. "Evaluation of ADWR Water Duties for Large Turf Facilities." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2006. http://hdl.handle.net/10150/147021.

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14 pp.<br>This publication summarizes the results of a three year research study that evaluated whether the turf water duties mandated by the Arizona Department of Water Resources provide adequate water to grow acceptable quality turf in the Tucson and Phoenix areas.

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TABO, RAMADJITA. "MORPHOLOGICAL AND PHYSIOLOGICAL DEVELOPMENT OF COTTON UNDER VARIOUS REGIMES OF DRIP IRRIGATION (STRESS, GROWTH, TRICKLE, WATER USE EFFICIENCY, ARIZONA)." Diss., The University of Arizona, 1985. http://hdl.handle.net/10150/188055.

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Cotton (Gossypium hirsutum L.) grown under drip irrigation was evaluated over a two year period for physiological and morphological responses. Three water levels representing, 103, 93 and 87% of estimated consumptive use (63.6 ha-cm) were used in Marana, AZ. in 1983. In 1984, cotton was grown under eight drip irrigation treatments corresponding to 120, 100, 80 and 60% of the estimated consumptive use (79.5 ha-cm) in Stanfield, AZ. These volumes of water were applied as small daily amounts and larger weekly amounts for a total of eight irrigation treatments. The experimental design was a random

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Elsherbiny, Ahmed. "Impact of Territorial Features on the Improvement of the Irrigation Efficiency: "What Kind of Proximity is Relevant for Improving Irrigation?" Case Study in Beheira Governorate, Egypt." Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3423261.

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This dissertation explores the possible differential influence of territorial features on the performance of irrigation improvement programs in Egypt. The study was conducted in El-Mahmoudia main canal, Beheira governorate which is one of the command areas in Nile Delta where Integrated Irrigation Improvement and Management Project (IIIMP) was applied in accordance with the principles of Integrated Water Resources Management (IWRM). Three branch canals on El-Mahmoudia main canal were purposively selected to represent the current situation of improved and unimproved irrigation systems. The firs

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Newby, Adam F. "Increasing Water Application Efficiency in Greenhouse Crop Production UsingGravimetric Data." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1366376123.

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Avalos, Sartorio Beatriz 1959. "COMPETITIVENESS, EFFICIENCY AND POLICY IN MODERN IRRIGATED AGRICULTURE IN THE STATES OF SONORA AND SINALOA, MEXICO." Thesis, The University of Arizona, 1987. http://hdl.handle.net/10150/276387.

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BHATTARAI, SURYA PRASAD, and s. bhattarai@cqu edu au. "THE PHYSIOLOGY OF WATER USE EFFICIENCY OF CROPS SUBJECTED TO SUBSURFACE DRIP IRRIGATION, OXYGATION AND SALINITY IN A HEAVY CLAY SOIL." Central Queensland University. Biological and Environmental Sciences, 2005. http://library-resources.cqu.edu.au./thesis/adt-QCQU/public/adt-QCQU20050903.222650.

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Fang, Lan Doppler Werner. "A spatial model (SWAM) for water efficiency and irrigation technology choices a case study from Northwestern China /." Weikersheim : Margraf, 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=970217595.

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Malouf, Christopher P., and n/a. "Evaluation of an airborne thermal scanner (8-12 µm) as an irrigation scheduling tool for cotton (Gossypium hirsutum)." University of Canberra. Resource, Environmental & Heritage Sciences, 1996. http://erl.canberra.edu.au./public/adt-AUC20060829.143622.

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Water is Australia's most precious natural resource. The quality, quantity and availability of this resource is the single factor most limiting agricultural development and sustainability in this country. Since the development of Australia's cotton industry in the 1960's, and the expanding areas of irrigated crop, there has been an increasing demand placed on the limited water resources of the country. Consequently, the cotton industry has been the target of protest from conservation groups, residents of rural townships and others farmers engaged in competing rural sectors. Therefore, cotton f

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Acharya, Tej Prasad. "Water Requirements, Use Efficiency, and Insect Infestation in Brussels Sprouts, and Nitrogen Use Efficiency in Sweet Basil under Low Tunnels compared to Open-field Production." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/86610.

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Sustainable vegetable production is one of the most active areas of vegetable research and of concern to all producers. Everyone, both producers and consumers, are concerned with sustainability. Brussels sprouts and sweet basil are high value commodities, but increasing global concerns about water availability, insect-pest problems, and costly fertilizer inputs severely impact the growth and production of these crops. Low tunnels covered with spun-bonded fabric can improve production of vegetables and herbs in Virginia and the U.S. This study investigated the performance of Brussels sprouts an

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Oliveira, AntÃnio Dimas SimÃo de. "AvaliaÃÃo do sensor de umidade TOPDEA no manejo da irrigaÃÃo." Universidade Federal do CearÃ, 2008. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=5228.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>A comunidade cientÃfica mundial, nos Ãltimos anos, tem intensificado os estudos para mensurar os impactos causados ao ambiente pela poluiÃÃo, principalmente os efeitos adversos ao ar e Ãgua. O fato de menos de 1% da Ãgua ser potÃvel e estar disponÃvel Ã superfÃcie da terra torna a mesma um bem de conflito. Segundo a FAO atÃ 2030 serÃ necessÃrio um incremento de 14% da Ãgua potÃvel, na irrigaÃÃo, a fim de suprir a demanda provocada pelo crescimento da populaÃÃo mundial. Um dos problemas clÃssicos, no manejo da irrigaÃÃo, Ã determi

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Oliveira, Antônio Dimas Simão de. "Avaliação do sensor de umidade TOPDEA no manejo da irrigação." reponame:Repositório Institucional da UFC, 2008. http://www.repositorio.ufc.br/handle/riufc/17644.

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OLIVEIRA, Antônio Dimas Simão de. Avaliação do sensor de umidade TOPDEA no manejo da irrigação. 2008. 71 f. : Dissertação (mestrado) - Universidade Federal do Ceará, Centro de Ciências Agrárias, Departamento de Engenharia Agrícola, Progarma de Pós-Graduação em Engenharia de Agrícola, Fortaleza-CE, 2008.<br>Submitted by demia Maia (demiamlm@gmail.com) on 2016-06-14T12:51:05Z No. of bitstreams: 1 2008_dis_adsoliveira.pdf: 13748562 bytes, checksum: 57833bde003cd50858fd12de77a6e763 (MD5)<br>Approved for entry into archive by demia Maia (demiamlm@gmail.com) on 2016-06-14T12:51:34Z (GMT) No. of bits

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Martello, Marco. "Ricerca e sviluppo di tecnologie per la gestione razionale dell'acqua irrigua." Doctoral thesis, Università degli studi di Padova, 2013. http://hdl.handle.net/11577/3422989.

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The PhD thesis’s aims was to investigate some theoretical and practical aspects of water irrigation used in small- and large-scale field tests. The first study analyzed the effect of the incident rainfall redistribution due to corn canopy and the effect of micro-variability of soil’s hydrological process at the row scale. Results of this study showed that the mean of throughfall and stemflow was 24% and 76% respectively, while the ratio stemflow/throughfall decreases during rainfall increases as logarithmic function. The stemflow/throughfall ratio was used to model the rainfall redistributi

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Mohottala, Gedara Kularatne. "Optimal allocation of water in village irrigation systems of Sri Lanka." Thesis, Queensland University of Technology, 2011. https://eprints.qut.edu.au/48342/1/Kularatne_Gedara_Thesis.pdf.

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This PhD study examines whether water allocation becomes more productive when it is re-allocated from 'low' to 'high' efficient alternative uses in village irrigation systems (VISs) in Sri Lanka. Reservoir-based agriculture is a collective farming economic activity, which inter-sectoral allocation of water is assumed to be inefficient due to market imperfections and weak user rights. Furthermore, the available literature shows that a „head-tail syndrome. is the most common issue for intra-sectoral water management in „irrigation. agriculture. This research analyses the issue of water allocatio

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Magayane, Machibya. "Challenging established concepts of irrigation efficiency in a water scarce river basin : a case study of the Usangu basin, Tanzania." Thesis, University of East Anglia, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.399804.

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Van, der Merwe Francois Petrus Johannes. "A method of evaluating an irrigation water use in terms of "efficient, sustainable and beneficial use of water in the public interest"." Diss., Pretoria : [s.n.], 2008. http://upetd.up.ac.za/thesis/available/etd-08282008-110336/.

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Harnish, Ryan Alexander. "Fish screen efficiency and effects of screened and unscreened irrigation canals on the downstream movement of westslope cutthroat trout juveniles in Skalkaho Creek, Montana." Thesis, Montana State University, 2007. http://etd.lib.montana.edu/etd/2007/harnish/HarnishR1207.pdf.

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Schons, Ricardo Luis. "AVALIAÇÃO DE PARÂMETROS DE DESEMPENHO DE SISTEMAS DE IRRIGAÇÃO POR PIVÔ CENTRAL VISANDO SUA OTIMIZAÇÃO OPERACIONAL." Universidade Federal de Santa Maria, 2006. http://repositorio.ufsm.br/handle/1/7520.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>With the competitiveness in the increasing agricultural sector, mainly in terms of globalization of the economy, the inclusion of new technologies in the agricultural sector, especially the irrigation, is basic to become the sector each more sustainable time. The irrigation systems are projected to have a long useful life, thus being, cannot be disrespected the operational costs with the energy and the consuming of accessories that it composes the same ones, that directly they are related to its hydraulical sizing, the watershed

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