[pp.97-102]

Study on Water Environmental Improvement in Xi’an City

Lei LEI, Osamu HIGASHI, Feng SHI, Akio ONISHI, Hiroaki SIRAKAWA and Hidefumi IMURA （Nagoya University）

Abstract:
Large cities in China are facing serious problems associated with the deterioration of water environments that has accompanied rapid economic growth. This paper discusses a case study of the situation in the city of Xi’an and the potential for improving infrastructure and transferring water rights between sectors for water conservation and mutual benefit. It was found that by transferring water rights between the agricultural and industrial sectors, for instance, that 18.6 million tons of groundwater and 6.9 million tons of surface water could be conserved every year, while at the same time improving the agricultural irrigation system. Also, by transferring water rights between the residential and industrial sectors, it is estimated that 3.7 million tons of wastewater presently discharged from the residential sector could be reused by the industrial sector. The cost of implementing a system to allow these two types of water rights transfers is calculated to be affordable, with the cost of the former estimated at 1.0 Renminbi (RMB) per ton of water, and the latter at 0.3 RMB per ton of water. While transferring water rights between sectors would improve the state of Xi’an’s water environment, this case study also concludes that the application of a water rights transfer system is economically feasible.

Key Word:
water rights transfer, water conservation, groundwater overdraw, Xi’an

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