33 research outputs found
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A model-based assessment of the effects of projected climate change on the water resources of Jordan
This paper is concerned with the quantification of the likely effect of anthropogenic climate change on the water resources of Jordan by the end of the twenty-first century. Specifically, a suite of hydrological models are used in conjunction with modelled outcomes from a regional climate model, HadRM3, and a weather generator to determine how future flows in the upper River Jordan and in the Wadi Faynan may change. The results indicate that groundwater will play an important role in the water security of the country as irrigation demands increase. Given future projections of reduced winter rainfall and increased near-surface air temperatures, the already low groundwater recharge will decrease further. Interestingly, the modelled discharge at the Wadi Faynan indicates that extreme flood flows will increase in magnitude, despite a decrease in the mean annual rainfall. Simulations projected no increase in flood magnitude in the upper River Jordan. Discussion focuses on the utility of the modelling framework, the problems of making quantitative forecasts and the implications of reduced water availability in Jordan
Effects of October 1981 flood on the quantity and quality of water in selected streams and reservoirs in the Brazos River Basin, Texas /
Shipping list no.: 86-565-P.Bibliography: p. 57.U.S. Geological Survey, Water Resources Division.Mode of access: Internet
Achieving agricultural pumpset efficiency in rural India
Throughout India, the operation of lift irrigation systems ('pumpsets') is grossly inefficient, resulting in massive over-consumption of energy and inadequate irrigation, limiting agricultural productivity growth and resulting in the reduced welfare of smallholder farmers. This paper examines the potential for pumpset 'rectification', a development intervention being considered for large-scale programmes by a number of state agencies in India. Assessing the energy demand for centrifugal pumpsets at the national level, it outlines a practical methodology for applying rectification in the field. The results of the analysis indicate that rectifications can be very cost-effective and can be applied on a broad scale. Institutional and policy implications are derived for ensuring that rectifications will be effective, sustainable, and will maximize the benefits to India's farmers. Copyright © 2001 John Wiley & Sons, Ltd.