Estimating Productivity of Water at Different Spatial Scales Using Simulation Modeling

Estimating Productivity of Water at Different Spatial Scales Using Simulation Modeling

Author: Peter Droogers

Publisher: IWMI

Published: 2001

Total Pages: 25

ISBN-13: 9290904313

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A clear understanding of the current water balance is required to explore options for water saving measures. However, measurement of all the terms in the water balance is infeasible in terms of spatial and temporal scale, but hydrological simulation models can fill the gap between measured and required data. For a basin in Western Turkey, simulation modeling at three different scales, field, irrigation scheme and basin scale, was performed to obtain all terms of the water balance. These water balance numbers were used to calculate the Productivity of Water at the three spatial levels distinguished to assess the performance of the systems.


A Gender Performance Indicator for Irrigation

A Gender Performance Indicator for Irrigation

Author: Barbara Van Koppen

Publisher: IWMI

Published: 2002

Total Pages: 52

ISBN-13: 9290904682

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Although gender issues are today a priority on the agendas of irrigation policy makers, interventionists, farm leaders and researchers, there is still a considerable gap between positive intentions and concrete action. An important but hitherto ignored reason for this is the lack of adequate generic concepts and tools that are policy-relevant and can accommodate the vast variation in irrigation contexts worldwide. The Gender Performance Indicator for Irrigation (GPII) aims to fill this gap. In any particular scheme, this tool diagnoses the gendered organization of farming and gender-based inclusion or exclusion in irrigation institutions. It informs irrigation agencies what they themselves can do for effective change-if necessary. The tool also identifies gender issues beyond a strict mandate of irrigation water provision. The Indicator was applied and tested in nine case studies in Africa and Asia. The research report presents the underlying concepts, methodological guidelines and selected applications of the GPII.


Urban Wastewater

Urban Wastewater

Author: Wim van der Hoek

Publisher: IWMI

Published: 2002

Total Pages: 29

ISBN-13: 9290905042

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Farming communities in water-scarce regions increasingly practice the use of urban wastewater in agriculture. Untreated urban wastewater is generally considered unacceptable for direct use because of potential health risks. However, in many parts of the world, poor farmers in peri-urban areas use untreated wastewater. This situation is considered likely to continue even in the foreseeable future due to the high investment cost associated with the installation of treatment facilities.


Land and Water Productivity of Wheat in the Western Indo-Gangetic Plains of India and Pakistan

Land and Water Productivity of Wheat in the Western Indo-Gangetic Plains of India and Pakistan

Author: Intizar Hussain

Publisher: IWMI

Published: 2003

Total Pages: 57

ISBN-13: 9290905050

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The purpose of this study is to analyze variations in wheat yields and to assess the range of factors affecting wheat yields and profitability of wheat production in the selected irrigation systems in India and Pakistan. The study attempts to identify constraints and opportunities for closing the existing yield gaps. It is hypothesized that substantial gains in aggregate yields can be obtained by improved water management practices at the farm and irrigation-system levels.


Small Irrigation Tanks as a Source of Malaria Mosquito Vectors

Small Irrigation Tanks as a Source of Malaria Mosquito Vectors

Author: Felix P. Amerasinghe

Publisher: IWMI

Published: 2001

Total Pages: 37

ISBN-13: 9290904615

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Thousands of small irrigation reservoirs (tanks) exist in rice ecosystems in malarious regions of south Asia. The potential of these tanks to generate malaria-transmitting mosquitoes has not been adequately evaluated. Through a study of nine small irrigation tanks in north-central Sri Lanka, this report provides an assessment of the capacity of tanks to generate malaria and nuisance mosquitoes, factors that contribute to mosquito generation, and measures that could ameliorate the problem.


9789290908487

9789290908487

Author: Giordano, Meredith

Publisher: Colombo, Sri Lanka: International Water Management Institute (IWMI) Washington, DC, USA: The World Bank

Published: 2017-06-01

Total Pages: 58

ISBN-13: 9290908483

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Water Scarcity and Managing Seasonal Water Crisis

Water Scarcity and Managing Seasonal Water Crisis

Author: R. Sakthivadivel

Publisher: IWMI

Published: 2001

Total Pages: 38

ISBN-13: 9290904445

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Coping with scarcity of water supply for managing irrigation under uncertain and inadequate conditions has become part and parcel of many irrigation systems in the semiarid tropics of Asia. Based on a case study of the Kirindi Oya Irrigation and Settlement Project (KOISP) in southern Sri Lanka, this report provides evidence of the uncertain and inadequate inflow into the reservoir and its impact on the seasonal planning.


Hydronomic Zones for Developing Basin Water Conservation Strategies

Hydronomic Zones for Developing Basin Water Conservation Strategies

Author: D. J. Molden

Publisher: IWMI

Published: 2001

Total Pages: 39

ISBN-13: 9290904631

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In this report, the concept and procedures of hydronomic (hydro water + nomus management) zones are introduced. A set of six hydronomic zones are developed and defined based on key differences between reaches or areas of river basins. These are the: Water Source Zone, Natural Recapture Zone, Regulated Recapture Zone, Stagnation Zone, Final Use Zone, and Environmentally Sensitive Zone. The zones are defined based on similar hydrological, geological and topographical conditions and the fate of water outflow from the zone. In addition, two conditions are defined which influence how water is managed: whether or not there is appreciable salinity or pollution loading; and whether or not groundwater that can be used for utilization or storage is present. Generic strategies for irrigation for four water management areas, the Natural Recapture, Regulated Recapture, Final Use, and Stagnation Zones, are presented. The Water Source Zone and Environmentally Sensitive Zone are discussed in terms of their overall significance in basin water use and management.


Wells and Welfare in the Ganga Basin

Wells and Welfare in the Ganga Basin

Author: Tushaar Shah

Publisher: IWMI

Published: 2001

Total Pages: 53

ISBN-13: 9290904461

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This report analyzes the history of groundwater development in the eastern Uttar Pradesh region over the 1950-1990 period. Its main conclusion is that the story of groundwater-based livelihood creation in the Ganga basin is one of failed public initiatives and successful adaptive responses by private agents. However, tube-well-induced agrarian dynamism in eastern Uttar Pradesh and north Bihar in recent years can spread to the entire basin if public policy makers learn correct lessons from the experience of these two subregions.


Determining the Economic Value of Water

Determining the Economic Value of Water

Author: Robert A. Young

Publisher: Routledge

Published: 2014-07-23

Total Pages: 359

ISBN-13: 1135040524

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Water provides benefits as a commodity for agriculture, industry, and households, and as a public good such as fisheries habitat, water quality and recreational use. To aid in cost-benefit analysis under conditions where market determined price signals are usually unavailable, economists have developed a range of alternative valuation methods for measuring economic benefits. This volume provides the most comprehensive exposition to-date of the application of economic valuation methods to proposed water resources investments and policies. It provides a conceptual framework for valuation of both commodity and public good uses of water, addressing non-market valuation techniques appropriate to measuring public benefits - including water quality improvement, recreation, and fish habitat enhancement. The book describes the various measurement methods, illustrates how they are applied in practice, and discusses their strengths, limitations, and appropriate roles. In this second edition, all chapters have been thoroughly updated, and in particular the coverage of water markets and valuation of ecosystem services from water has been expanded. Robert Young, author of the 2005 edition, has been joined for this new edition by John Loomis, who brings additional expertise on ecosystem services and the environmental economics of water for recreational and other public good uses of water.