By Howard Wheater, Soroosh Sorooshian, K. D. Sharma
Arid and semi-arid areas are outlined as components the place water is at its such a lot scarce. The hydrological regime in those parts is severe and hugely variable, they usually face nice pressures to carry and deal with freshwater assets. in spite of the fact that, there's no counsel at the selection help instruments which are had to underpin flood and water source administration in arid components. UNESCO initiated the worldwide community for Water and improvement info for arid lands (GWADI), and organized a workshop of the world's prime specialists to debate those concerns. This publication offers chapters from members to the workshop, and contains case reports from the world's significant arid areas to illustrate version functions, and net hyperlinks to tutorials and state-of-the-art modelling software program. This quantity is a helpful reference for researchers and engineers engaged on the water assets of arid and semi-arid areas.
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Additional info for Hydrological Modelling in Arid and Semi-Arid Areas
In this chapter, we will introduce one near-global precipitation product generated from the PERSIANN (Precipitation Estimation from Remotely Sensed Information using Artificial Neural Networks) algorithm. PERSIANN is an adaptive, multi-platform precipitation estimation system, which uses artificial neural network (ANN) technology to merge high-quality, sparsely sampled data from NASA, NOAA, and DMSP low altitude polarorbital satellites (TRMM, DMSP F-13, F-14, and F-15, NOAA-15, -16, -17) with continuously sampled data from geosynchronous 2 .
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Hughes and Sami (1993) illustrated the importance of small farm dams through a study of a 670 km2 basin in the Eastern Cape province of South Africa. Over 50 % of the dams (a total of 364) have a full supply volume of less than 2000 m3 and catchment areas of less than 2 km2 . The runoff storage capacity (dam volume divided by catchment area) of 60 % of the dams is less than 2 mm, while 20 % have storage capacities of between 5 and 20 mm. While these capacities may appear quite low, they are more than sufficient to absorb runoff generated in a substantial proportion of storm events.