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Optimal Irrigation Decisions With Limited Water
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Book Synopsis Optimal Irrigation Decisions with Limited Water by : Herbert Gregory Blank
Download or read book Optimal Irrigation Decisions with Limited Water written by Herbert Gregory Blank and published by . This book was released on 1975 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: A multiple crop irrigation planning model was developed to determine crop acreages and irrigation timings and amounts under two objectives. The objectives were maximization of expected return and minimization of variance due to random precipitacion. The model is applied to a representative farm in the irrigated area near Ft. Morgan, Colorado. Recent experimental data from field trials on corn at colorado State University were used. An evapotranspiration ET prediction model was developed which reconstruced soil moisture over the season for varying irrigation treatments. Regression analysis was used to determine parameters in production functions relating ET in various time periods to yields. An additive and a multiplicative relation were tested. A dynamic programming model was developed which determined optimal amounts of irrigation at pre-scheduled times for a single crop. The adopted ET prediction model and first the multiplicative and then the additive production function were incorporated into this program. Initiallys the problem is solved with unlimited water available at a pre-determined price. The model is solved again with waater limited in various time periods. The results of this program simulate the situation when the crop competes with other crops for the limeted water supply. Secondary datea were used to determine timings and amounts of irrigation water for various production levels of the other crops considered in the study. The multiple crop case incorporates the results of the single crop model.(...).
Book Synopsis Optimal Irrigation Management Under Conditions of Limited Water Sypply by : D.J. Bernardo
Download or read book Optimal Irrigation Management Under Conditions of Limited Water Sypply written by D.J. Bernardo and published by . This book was released on 1986 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optimal irrigation management under conditions of limited water supply.
Book Synopsis Optimal Irrigation Management Under Conditions of Limited Water Supply by : Daniel J. Bernardo
Download or read book Optimal Irrigation Management Under Conditions of Limited Water Supply written by Daniel J. Bernardo and published by . This book was released on 1986 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Optimal Irrigation Management Under Conditions of Limited Water Supply by :
Download or read book Optimal Irrigation Management Under Conditions of Limited Water Supply written by and published by . This book was released on 1986 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Agricultural Water Management by : National Research Council
Download or read book Agricultural Water Management written by National Research Council and published by National Academies Press. This book was released on 2007-03-20 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report contains a collection of papers from a workshopâ€"Strengthening Science-Based Decision-Making for Sustainable Management of Scarce Water Resources for Agricultural Production, held in Tunisia. Participants, including scientists, decision makers, representatives of non-profit organizations, and a farmer, came from the United States and several countries in North Africa and the Middle East. The papers examined constraints to agricultural production as it relates to water scarcity; focusing on 1) the state of the science regarding water management for agricultural purposes in the Middle East and North Africa 2) how science can be applied to better manage existing water supplies to optimize the domestic production of food and fiber. The cross-cutting themes of the workshop were the elements or principles of science-based decision making, the role of the scientific community in ensuring that science is an integral part of the decision making process, and ways to improve communications between scientists and decision makers.
Book Synopsis Optimal Irrigation Management Under Conditions of Limited Water Supply in the Jordan Valley by : Hussein Al-Qudah
Download or read book Optimal Irrigation Management Under Conditions of Limited Water Supply in the Jordan Valley written by Hussein Al-Qudah and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Irrigation Scheduling with Limited Water Supplies by :
Download or read book Irrigation Scheduling with Limited Water Supplies written by and published by . This book was released on 1991 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Value of Using Hydrological Datasets for Water Allocation Decisions: Earth Observations, Hydrological Models and Seasonal Forecasts by : Alexander José Kaune Schmidt
Download or read book The Value of Using Hydrological Datasets for Water Allocation Decisions: Earth Observations, Hydrological Models and Seasonal Forecasts written by Alexander José Kaune Schmidt and published by CRC Press. This book was released on 2019-11-21 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: An increasing number of hydrological datasets from earth observations, hydrological models and seasonal forecasts have become available for water managers, consultants and the general public. These datasets are state-of-the-art products which are usually accessible online and may contribute to develop hydrological studies and support water resources management. However, the added value of these datasets has not been completely explored in decision-making processes. Research studies have assessed how well data can help in predicting climate, but there is a lack of knowledge on how well data can help in water allocation decisions. This work provides numerical tools, methods and results to evaluate the value of using hydrological datasets to support water allocation decisions at river basin and irrigation district scale. An integrated approach is used to predict climate, improve decisions and reduce negative impacts. Results show that investing in hydrological data with finer spatial and temporal resolution and longer periods of record improves water allocation decisions and reduces agricultural production loss in large irrigation schemes. Using river discharge data from hydrological models and global precipitation enhances irrigation area planning when little in-situ data is available. Moreover, using seasonal streamflow forecasts improves available water estimates resulting in better water allocation decisions. The framework was tested in Costa Rica, Colombia and Australia, but can be applied in any case study around the world.
Author :Food and Agriculture Organization of the United Nations Publisher :Food & Agriculture Org. ISBN 13 :9789251047682 Total Pages :116 pages Book Rating :4.0/5 (476 download)
Book Synopsis Deficit Irrigation Practices by : Food and Agriculture Organization of the United Nations
Download or read book Deficit Irrigation Practices written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2002 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the context of improving water productivity, there is a growing interest in deficit irrigation, an irrigation practice whereby water supply is reduced below maximum levels and mild stress is allowed with minimal effects on yield. Under conditions of scarce water supply and drought, deficit irrigation can lead to greater economic gains than maximizing yields per unit of water for a given crop; farmers are more inclined to use water more efficiently, and more water-efficient cash crop selection helps optimize returns. However, this approach requires precise knowledge of crop response to water as drought tolerance varies considerably by species, cultivar and stage of growth. The studies present the latest research concepts and involve various practices for deficit irrigation. Both annual and perennial crops were exposed to different levels of water stress, either during a particular growth phase, throughout the whole growing season or in a combination of growth stages. The overall finding, based on the synthesis of the different contributions, is that deficit or regulated-deficit irrigation can be beneficial where appropriately applied. Substantial savings of water can be achieved with little impact on the quality and quantity of the harvested yield. However, to be successful, an intimate knowledge of crop behavior is required, as crop response to water stress varies considerably.
Book Synopsis Optimal Irrigation Strategy with Limited Water Availability Accounting for the Risk from Weather Uncertainty by : Rulianda Purnomo Wibowo
Download or read book Optimal Irrigation Strategy with Limited Water Availability Accounting for the Risk from Weather Uncertainty written by Rulianda Purnomo Wibowo and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Risk averse farmers face a substantial challenge managing irrigation water when they face limited water availability. The two primary reasons for limited water availability in the High Plains Aquifer region of the United States are limited well capacity (i.e., the rate at which groundwater can be extracted) or a constraint imposed by a policy. In this dissertation, I study how risk averse farmers optimally manage limited water availability in the face of weather uncertainty and also the impact of limited water availability on farmer welfare. I use AquaCrop, a daily biophysical crop simulation model, to predict corn yield under alternative irrigation scenarios with historical weather. Since no simple functional form exists for the crop production function, I use discrete optimization and consider 234,256 potential irrigation strategies. I also account for risk preferences by using expected utility analysis to determine the optimal irrigation strategy. Using a daily biophysical model is important because water stress in a short period of the growing season can impact crop yield (even if average water availability throughout the growing season is sufficient) and well capacity is a constraint on daily water use. The daily biophysical crop simulation model accounts for the dynamic response of crop production to water availability. First, I examine how optimal irrigation strategies change due to limited water availability. I find that it is never optimal for irrigators to apply less than a particular minimum instantaneous rate per irrigated acre. An optimal required instantaneous rate implies that a farmer with a low well capacity focuses on adjustment at the extensive margin. On the other hand, farmers who initially have a high well capacity should adjust at the intensive margin in response to well capacity declining. I also find that total water use increases as the degree of risk aversion increases. More risk averse farmers increase water use by increasing irrigation intensity to reduce the variance in corn yields. Another important finding is that a higher well capacity could actually promote less water use because the higher well capacity allows a greater instantaneous rate of application that allows the farmer to decrease irrigation intensity while still maintaining or increasing corn yield. This finding may imply an accelerated rate of groundwater extraction when the groundwater depletion reaches a particular threshold. Second, I analyze the welfare loss due to limited water availability. The relationship between welfare loss and well capacity due to a policy constraint differs by soil type. I found the welfare loss from a water constraint policy does not always increase as well capacity increases. Farmers with very high well capacity may make small or no adjustment at the extensive margin due to a higher instantaneous rate and higher soil water holding capacity. However, that is not the case for a farmer with land that has lower soil water holding capacity as the increase in well capacity results in greater welfare loss. I also investigate the effect of risk averse behavior on the magnitude of welfare loss. I found that the welfare loss per unit of reduced water use is lower for the farmer with more risk aversion. Thus, economic models that ignore risk aversion misestimate the cost of reducing water use. Finally, I investigate the incentive for adopting drip irrigation and its effect on water use. I find that a decrease in well capacity increases the benefits of adopting drip irrigation but is not sufficient to overcome the high initial investment cost without government support. While subsidies of the magnitude offered by current U.S. programs are sufficient to induce drip irrigation adoption, I find that such subsidies have the unintended consequence of increasing total water use, particularly for small well capacities.
Book Synopsis Fundamentals of Irrigation and On-farm Water Management: Volume 1 by : Hossain Ali
Download or read book Fundamentals of Irrigation and On-farm Water Management: Volume 1 written by Hossain Ali and published by Springer Science & Business Media. This book was released on 2010-09-08 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt: Agriculture is one of the few industries that has been creating resources conti- ously from nature. Sustainability of this industry is a crucial issue at now-a-days. Agricultural technologies are important to feed the growing world population. Agricultural engineering has been applying scienti?c principles for the optimal use of natural resources in agricultural production for the bene?t of humankind. The role of agricultural engineering is increasing in the coming days at the forthcoming challenges of producing more food with less water coupled with climate uncertainty. I am happy to know that a book entitled "Fundamentals of Irrigation and On-farm Water Management", written by Engr. Dr. M. H. Ali, is going to be p- lished by Springer. The book is designed to cover the major ?elds of agricultural and environmental engineering such as weather, plant, soil, water, and basics of on-farm water management. The book will be quite useful for the students of agricultural engineering. Students of other related branches of engineering s- ences, and engineers working in the ?eld and at research institutes will also be beni?ted. The book may serve as a text book for the students and as a practical hand-book for the practitioners and researchers in the ?eld of irrigation and on-farm water management. Utilization of the recent literature in the area and citation of relevant journals / reports have added a special value to this book. Considering the topics covered, engineers, scientists, practitioners, and educators will ?nd this book as a valuable resource.
Book Synopsis A.I.D. Research and Development Abstracts by :
Download or read book A.I.D. Research and Development Abstracts written by and published by . This book was released on 1976 with total page 1136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Great Plains Irrigation, 1975-80 by : Curtis A. Everson
Download or read book Great Plains Irrigation, 1975-80 written by Curtis A. Everson and published by . This book was released on 1981 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Application of Decision Theory in Irrigation Optimization by : Marshall J. English
Download or read book Application of Decision Theory in Irrigation Optimization written by Marshall J. English and published by . This book was released on 1978 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Optimization of Water-use Efficiency in Crop Production Systems by Dynamic Simulation of Crop Behavior Under Stochastic Regimes by : Jamil Ahmed
Download or read book Optimization of Water-use Efficiency in Crop Production Systems by Dynamic Simulation of Crop Behavior Under Stochastic Regimes written by Jamil Ahmed and published by . This book was released on 1974 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Innovative Biosystems Engineering for Sustainable Agriculture, Forestry and Food Production by : Antonio Coppola
Download or read book Innovative Biosystems Engineering for Sustainable Agriculture, Forestry and Food Production written by Antonio Coppola and published by Springer Nature. This book was released on 2020-03-19 with total page 860 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers the latest advances, innovations, and applications in the field of innovative biosystems engineering for sustainable agriculture, forestry and food production. Focusing on the challenges of implementing sustainability in various contexts in the fields of biosystems engineering, it shows how the research has addressed the sustainable use of renewable and non-renewable resources. It also presents possible solutions to help achieve sustainable production. The Mid-Term Conference of the Italian Association of Agricultural Engineering (AIIA) is part of a series of conferences, seminars and meetings that the AIIA organizes, together with other public and private stakeholders, to promote the creation and dissemination of new knowledge in the sector. The contributions included in the book were selected by means of a rigorous peer-review process, and offer an extensive and multidisciplinary overview of interesting solutions in the field of innovative biosystems engineering for sustainable agriculture.
Book Synopsis Methodology and Strategies for Multi-season Farm-level Irrigation Decisions Under Limited Water Conditions by : Noel R. Gollehon
Download or read book Methodology and Strategies for Multi-season Farm-level Irrigation Decisions Under Limited Water Conditions written by Noel R. Gollehon and published by . This book was released on 1987 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
