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Reservoir Pool Elevation: Considerations for Long-term Asset Management and Planning
Long-term management of critical water resources infrastructure needs to incorporate projected changes to environmental conditions. Reservoirs form the heart of water resource assets. Long-range plans for the repair, replacement, maintenance and renovation of these facilities depend on accurate projections of reservoir pool elevations. Environmental conditions, in turn, dictate the magnitude and timing of inflows and outflows from reservoirs, and thus the resulting water surface elevation. This lesson explores the factors that affect reservoir pool elevation and the considerations and challeng ...
Overview of Watershed and Channel Sedimentation
This lesson provides an overview of the primary influences of watershed and channel sedimentation. In a short narrated portion of the lesson, we explore a section of the Rio Grande watershed and channel in New Mexico using Google Earth imagery, river profiles, and graphic animations. We highlight features of the upland catchments, the river channel, and the Elephant Butte Reservoir. We then demonstrate how environmental factors (climate, geography, land use changes, reservoirs) impact the supply and movement of sediments for the Rio Grande and other rivers. The focus is on the three primary pr ...
Water for wealth and food security: supporting farmer-driven investments in agricultural water management
IWMI, 2012This report addresses the effective use of available water as a way to help to improve productivity and reduce poverty in sub-Saharan Africa. It combines the practical improved water management systems and approaches, including the reduction of risks associated with climate variability through environmental risks monitoring. It documents the benefits of irrigation already been invested by farmers in small-scale irrigation, and provides practical recommendations and tools for governments, the private sector, donors and organizations to effectively support these farmer-led initiatives to improve ...
Performance analysis of on-demand pressurized irrigation systems
Lamaddalena Nicola; Sagardoy J.A.; Food and Agriculture Organization (FAO) - FAO, 2000 (FAO irrigation and drainage paper-No. 59)The main objective of this publication is to analyse the performance of pressurized irrigation systems operating on-demand (also under other conditions) and to provide revised criteria for the design of such irrigation networks. For this purpose, new approaches and a computer tool (COPAM) have been developed. Calculation examples have been included to demonstrate the procedures and facilitate the understanding and practical use of formulae. This publication should be of particular interest to irrigation district managers, consultants, irrigation engineers and companies, university professors, ...
Crop evapotranspiration : guidelines for computing crop water requirements
Allen Richard G.; Pereira Luis S.; Raes Dirk; et al. - FAO, 1998 (FAO irrigation and drainage paper-No. 56)This publication presents an updated procedure for calculating reference and crop evapotranspiration from meteorological data and crop coefficients. The procedure, first presented in FAO Irrigation and Drainage Paper No. 24, Crop water requirements, in 1977, allows estimation of the amount of water used by a crop, taking into account the effect of the climate and the crop characteristics. The publication incorporates advances in research and more accurate procedures for determining crop water use as recommended by a panel of high-level experts organized by FAO in May 1990. The first part of th ...
Evapotranspiración del cultivo : guías para la determinación de los requerimientos de agua de los cultivos
Allen Richard G.; Pereira Luis S.; Raes Dirk; et al. - FAO, 1998 (FAO irrigation and drainage paper-No. 56)
Wastewater treatment and use in agriculture
Gommes René A.; Food and Agriculture Organization (FAO) - FAO, 1992 (FAO irrigation and drainage paper-No. 47)
Mechanized sprinkler irrigation
Rolland Lionel; Food and Agriculture Organization (FAO) - FAO, 1982 (FAO irrigation and drainage paper-No. 35)
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