Based on SDA of Water Resources Management Evaluation——A Case of Zhangye City in the Heihe Region

Abstract

Abstract:

Under integrated water resources management, water resources management is decomposed into 4 phases:supply manage-ment, technical water conservation, structural water-saving and social management. Based on regional input-output model, using struc-tural decomposition analysis (SDA) method, the consumption of water quantify factors is decomposed into technical factors, structural factors (intermediate demand effect) and systemic factors (final demand effect), to evaluate Zhangye City in the 2002-2012 water man-agement stage. The results show that:during the period 2002 to 2007, the main force that drives the reduction of water consumption in Zhangye City comes from the structural (intermediate demand) factors that determine water management in structural phase; during the period 2007 to 2012, systemic factors (final demand effect) play a significant role in water reduction, and the water resources manage-ment of Zhangye City at this stage transferred from the structural stage to socialized management stage by virtual water strategy adjust-ment. Structural decomposition analysis (SDA) method provides a simple way for evaluating water resources management stage.

Key words: evaluation of water resources management, input-output, structural decomposition analysis (SDA), Zhangye City

Wang Miaomiao, Ma Zhong, Hui Xiangxiang. Based on SDA of Water Resources Management Evaluation——A Case of Zhangye City in the Heihe Region[J]. , 2018, 30(5): 158-164.

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