112-Water Resources Allocation Model with Blue Water and Green Water.

Abstract

: China has faced many problems about water resources for a long time, such as shortage, uneven distributions among regions, wasting and so on. With rapid development of social economics, the demand of water is pressuring, so optimal allocation of water resources is in critical need. Therefore, to build a harmony water rights system and a mature water market, and then fulfill tradable water rights mechanism, are key parts of the present management of water resources. Since the initial water rights allocation is the precondition of water rights trade, it is theoretically significant to probe into an allocation model for it. In order to offer an effective theory support for initial water rights allocation, this paper attempts to define measurable criteria on the basis of which water resources can be allocated to the regions in basin in an equitable and reasonable manner. In this paper, the concept of blue water and green water were discussed in water right allocation. Two models, only blue water and both blue and green water considered, were used to modeling the water resources allocating in proportion to each region's area, population, arable land or the GDP, in order for sustainable development. The model put more emphasis on transferred water volume, which is in close relationship with the procedure of water transferring, both inside and outside the river basin. A case study was carried out in the Hanjiang River Basin, where the river is bifurcate and the largest branch of Yangtze. The modeling results in sub-districts under different criteria are discussed.