Rainwater Harvesting and Rainfed Agriculture

Worldwide, water resources management has been undergoing changes due to population growth, urbanization and economic development; the issue of climate change adds a new dimension to the ongoing dynamics of water supply and demand. Reductions in rainfall have been observed in the lower tropical latitudes[1]. Some experts are predicting further declines in rainfall and amplification of extreme events[2]. Rainfed agriculture plays and will continue to play a dominant role in providing food and livelihoods in the world with an ever increasing population. How to improve in-situ rainwater use and hence reduce the agricultural risk is an important task nowadays. Rainwater harvesting has been practiced for many years in many areas of the world, especially, in arid and semi-arid regions like the Loess Plateau, North America, Middle-East, sub-Saharan Africa

Project Summery

There is a growing scarcity of and competition for water among agricultural, industrial, commercial, and residential sectors forcing water resources management to allocate water more efficiently. In semi-arid and sub-humid regions, wherever rainfed agriculture is practiced, agricultural drought is a common problem. In order to improve crop water productivity and at the same time reduce the risk of rainfed agriculture, RWH potential assessment is necessary. It asks the clear understanding of soil hydrological properties, its spatial and temporal variation and affecting factors. These properties can be measured and monitored in field and indoors. GIS and hydrological models can be integrate simulate the rainfall-runoff process and hence estimate the RWH potential. By balance the crop water requirement, available rainfall and soil moisture, the crop water deficit can be calculated.
Small scale storage works can be the best choice for supplementary irrigation in hilly are

About Projects

Microcatchment water harvesting systems (MicroWH)

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