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STUDY OF REGIONAL ECOLOGICAL WATER REQUIRMENT IN TONGZHOU DISTRICT BASED ON GEOLOGICAL INFORMATION SYSTEM TECHNIQUE

Congress: 2008
Author(s):
Pan Xingyao 1 2, Xia Jun 1, Liu Honglu 3, Li Fahu 4 1. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China 2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, China 3. Beijing Hydraulic Resea

Keyword(s): Ecological water requirment, Geographic Information System (GIS)
AbstractEcological water requirement(EWR) is one of the most important parts of water use, and its calculation is a basic of safe water use and scientific allocation of water resource in region. According to characteristics of regional water resource evaluation work and strong space distribution function of G IS, the feasibility of using geological information system technique in ecological water requirement was approached in the paper. Based on analyses of precipitation, runoff and groundwater data, natural ecological system in Tongzhou District, Beijing, was classified under the help of geological information system technique, calculation method and amount of ecological water requirement were determined. The calculated data indicated that the amount of ecological water requirement was 45.32106 m3/a in Tongzhou District in 2003, the total amount of daily life, production and ecological environmental water requirement was as high as 1.23 times of available water resource amount, and so the gap between available water amount and its requirement was obvious. After adoption of water-saving techniques and exploitation of new water sources, it is predicted that the water requirement of daily life, production and ecological environment can be basically met in 2010 and 2020, and hence realizes water balance of available water amount and its requirement in the region. The research about ecological environmental water require forwards to scientific basis for sustainable utilization in this region
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