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10th International Rainwater Catchment Systems Conference
"Rainwater International 2001"
Mannheim, Germany - September 2001

Section 2: Rainwater Catchment in Humid and Arid Regions

Paper 2.28

Rainwater Utilization in the Coastal Area of Southeast China

Yi Yongqing
Yuyao Municipal Bureau of water Resources
Yuyao City 315400
China
email: qzh@zgb.com.cn

Abstract

In the coastal area of Southeast China, owing to the uneven distribution of rainfall and the high population density as well as the pollution of surface and groundwater, the exploitable water resources per capita is low and the seasonal water shortage occurred frequently. Effective rainwater utilization has been taken seriously. The paper gives an introduction to the rainwater utilization in the rural area of Yuyao municipality.

1. Effective use of rainwater in the paddy area: The irrigation technique for paddy land with shallow submersion and without submersion. Because the surface runoff, under ground seepage loss and evapo-transpiration were reduced, the rainwater utilization efficiency was raised. The irrigation water amount and the consumed energy were reduced by 2000~5000 m3 and 90~220 kWh per hectare, respectively while the yield of paddy was increased by 350~750 kg per hectare.

2. Rainwater utilization in the dry farming land

In the Xiaolu village, the rainwater harvesting and irrigation project has been built from 1999 to 2000. In the 100 ha cultivated land, 100 km long ditch for storing rainwater was excavated with storage capacity of 27000~40000 m3. The water source is reliable and the quality is very good. The sprinkler and drip system was built to irrigate the vegetables and fruit trees, of which the products are with no pollution and well known as "green food".

PDF of full document (1pp, 7kb)


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