Research On Multi-Dimensional Coordinated Allocation Model Of Water Resources And Its Application

With the excessive exploitation and utilization of water resources, lead to the problems of water shortage, water pollution and the degeneration of ecological environment since the late 20s. Water shortage is replacing the oil to become the main problem which causes the world crisis. It is one of the most severe problems that we are facing in 21s. However, water allocation is the most effective way to solve the water shortage problem. Optimization of limited water resources allocation is the way that the water resource is merging with social economic and ecosystem. It provided a way to ensure the sustainable use of water resource, promote the synergetic development of social economic, and restore ecosystem. Based on the former studies, this paper built a multi-dimensional model which used transferred water to replace the underground water. We took Shenyang as the research area to test the model. The results were as follow:(1) Based on the system diagnostics and assessment of exploitation and utilization of water resources and water supply risk, we used underground water utilization planning to allocate emergency drinking water resource and reserved water resource. A new water supply safety system has formed which provide reference for water supply contingency plans.(2) We collected hydrogeological and borehole sections information. The modeling of three dimensional stratum were conducted in plain area. This model provided reference for collaborative optimization between underground water, groundwater and transferred water.(3) A numerical simulation model was built to identify a series of hydrogeological parameters and equilibrium elements which established a firm foundation for groundwater bidirectional control and calculation of minable groundwater.(4) Based on analysis of the three dimensional stratum model and hydrogeological parameters, we established a new coupled iteration method for minable groundwater calculation under different hydrological years and different patterns of water resource allocation.(5) We used a combination of urban water supply risk and multi-solution water requirement analysis,3D geological model, water balance model, and numeric groundwater model to establish a new water resources allocation model, which provided a kind of calculation process of multi-dimensional coordinated allocation method. It contributed to analyze the dynamic changing trend of groundwater and adjust the water allocation patterns.(6) According to the multi-dimensional models and the counting process, we compared different schemes of monthly long-term regulation computation. Allocation results were confirmed under different hydrological years and insurance rates. The total water requirement and water supply of Shenyang are 39.88 × 108m3 and 39.87 × 108m3 in 2030, which included surface water (5.65×108m3), groundwater (18.51 × 108m3), reclaimed water (3.14× 108m3) and the water transferred water (7.53 × 108m3). The water deficit is 196×105m3 and the ratio of water deficiency is 0.05% in Shenyang. While the water requirement and water supply of the five districts in the city are 10.27×108m3 in 2030, which included surface water (0.11 × 108m3), groundwater (0.93 × 108m3), reclaimed water (1.70×108m3) and the water transferred water (7.53 × 108m3). The water deficit and the ratio of water deficiency of the five districts are 7×105m3 and 0.01%. We reserved 3.51×108m3 for drinking water emergency use and 2.41 × 108m3 for water resources reserve.The major drinking water source of Shenyang city is the local groundwater. Single water resource and overdependence on groundwater may lead to great trouble in case of unexpected pollution and sudden accident. The adjustment of multi-dimensional coordinated allocation will change the current situation completely. Transferred water is the main supplying water resource in Shenyang city. Groundwater in five districts of Shenyang is for emergency water resource. Groundwater in other four districts around Shenyang City and the water from Shifosi reservoir are reserved water resources for the entry city.