Rainwater Harvesting Techniques for Irrigation



Experience in China over recent decades has shown that RWH cannot only provide water for domestic use but also for supplemental irrigation. As already noted, RWH systems are mini-sized water resource schemes. The amount of rainwater stored in a RWH system is generally very limited requiring very efficient use. RWH-based irrigation is therefore a special kind of water-saving irrigation. It uses much less water than conventional water-saving irrigation and is more appropriately called “low rate irrigation” (LORI). Investigations have shown that LORI water supplied to the crop only consists of 10–15 % of the total crop water consumption over the whole growing season. Most of the water used by the crop is from natural rainfall. Some experts doubt that such a small amount of water can have any effect on the crop yield.


Rainwater harvesting irrigation Low rate irrigation Deficit irrigation Water-saving irrigation 


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Copyright information

© Springer Science+Business Media Singapore and Science Press, Beijing 2015

Authors and Affiliations

  1. 1.Gansu Research Institute for Water ConservancyLanzhouChina

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