Download or read book Models for Sprinkler Irrigation System Design Cost and Operation written by R. L. Petruschell and published by . This book was released on 1982 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: PAWN studie

Download or read book Policy Analysis of Water Management for the Netherlands written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Policy Analysis of Water Management for the Netherlands written by R. L. Petruschell and published by . This book was released on 1982 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Policy Analysis of Water Management For the Netherlands Vol 13 Model For Sprinkler Irrigation System Design Cost and Operation written by Rand Corporation and published by . This book was released on 1980 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book POLICY ANALYSIS OF WATER MANAGEMENT FOR THE NETHERLANDS VOL 13 MODELS FOR SPRINKLER IRRIGATION SYSTEM DESIGN COST AND OPERATION written by Rand Corporation and published by . This book was released on with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Preliminary Report Economic Design and Operation of Sprinkler Irrigation Systems written by George A. Pavelis and published by . This book was released on 1957 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Design Construction and Operation of a Project type Sprinkler Irrigation System written by Percy M. Pharr and published by . This book was released on 1960 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sprinkler Irrigation System Design Model and Application written by Usaid Izzat Suliman ElHanbali and published by . This book was released on 1977 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Selected Annotated Bibliography on the Analysis of Water Resource Systems written by Water Resources Scientific Information Center and published by . This book was released on 1975 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Parametric Design and Performance Validation of Low cost Low pressure Drip Emitters and Irrigation Systems written by Julia Alexandrovna Sokol and published by . This book was released on 2020 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis proposes and validates methods to reduce the cost and energy use of drip irrigation systems, with the aim of increasing their adoption among smallholder farmers. By 2050, the growing world population will require a 55% increase in food production above 2010 levels. Yet, agriculture already places a large strain on the earth’s resources, occupying 47% of habitable land area and comprising 70% of freshwater withdrawals. Thus, agricultural intensification needs to occur through increased efficiency, rather than increased resource consumption. While irrigation is an effective means to increase food production over rainfed land, traditional surface and overhead irrigation systems--such as flood, furrow, and sprinkler--have low water use efficiencies. Drip irrigation, which distributes water through a pressurized pipe network and slowly releases it through emitters in the immediate root zone of each crop, has been shown to increase water efficiency by 25-65% over flood or furrow irrigation. However, adoption of drip irrigation is limited by several factors, including high initial cost compared to conventional practices. To address the cost barrier to drip irrigation adoption, this work focuses on modeling, designing, and validating drip components and systems that operate at low pressures, reducing energy consumption and the costs of pumps and power systems. These savings are enabled by pressure-compensating (PC) emitters--which maintain a constant flow rate with variations in pressure--specifically designed for low-pressure operation. The first part of this thesis experimentally validates the ability of low-pressure PC online emitters (used for tree crops) designed by the MIT Global Engineering and Research Lab to reduce pumping power and energy in a series of field trials in the Middle East and North Africa. With a minimum operating pressure of 0.15 bar, these online emitters are shown to reduce pumping energy by at least 43% compared to commercial emitters with higher operating pressures, without compromising water distribution uniformity. The next section focuses on the design of low-pressure PC inline emitters (used for vegetable crops), which are bonded to the interior of irrigation tubing. While inline emitters are manufactured widely, their design in industry occurs largely by trial-and-error, which may limit product performance. To address this gap, this section presents a new, fully-analytical, parametric model for predicting the activation pressure and flow rate of typical inline PC emitters from their geometry and material properties of the membrane. The model’s utility is demonstrated by systematically redesigning a commercial emitter to reduce its minimum compensating pressure from 0.4 bar to 0.15-0.25 bar, depending on the membrane used, while maintaining a similar flow rate. The last section of this thesis places low-pressure emitter designs in a system-level context to evaluate their impact and suggest further research directions. Concurrently, it presents a flexible, parametric model for designing cost-optimal drip irrigation systems with grid and off-grid power sources for any farm location, size, and crop. When applied to case studies representative of typical farms in Morocco, the model shows potential reductions of up to 20% in initial cost and up to 9% in lifetime system cost with optimized low-pressure drip systems, compared to conventional system designs. The results are used to identify and recommend opportunities for further system cost reduction.

Download or read book A Selected Annotated Bibliography on the Analysis of Water Resource Systems written by and published by . This book was released on 1976 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book EPA 600 2 written by and published by . This book was released on 1979 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Selected Annotated Bibliography on the Analysis of Water Resource Systems written by Daniel P. Loucks and published by . This book was released on 1973 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Miscellaneous Publication written by and published by . This book was released on 1983 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Irricab written by and published by . This book was released on 1986 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report written by United States. Office of Water Resources Research and published by . This book was released on 1969 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: