The linear programming model of water resource utilization
Wang Zhenlong (1)
(1) Anhui Water Science Institute
The total infield of Huaibei Area in Anhui Province is 2.067*106 ha, and the cultivatable area, which is the important base of grain and cotton, is 50.6% of the infield of Anhui Province. In recent years, the increase of industrial, agricultural and domestic water demand, and non-even temporal and spatial distributed water resource lead to the conflict between the agricultural water supply and demand. Especially in the dry year, the groundwater level decreases, and the cost of irrigation increases. Severely, the pumps were left unused, and the benefit of irrigating engineer cannot be achieved. In order to get the maximum profit of irrigation, the following problems of Huaibei Area need to be solved: how to distribute the resources of surface water and ground water, how to arrange the layout of crops and how to choose the best system of water-saving irrigating engineer.
This paper applies the theory of system engineering to Weidian irrigated area in Huaibei in order to get the maximum net profit. Based on the constraints of the surface water and groundwater, availability, water quantity, the well yield ability, the pumping ability, and the requirement of water logging prevention, and the better annual planting pattern, a planning of water supply and distribution of surface water and groundwater are put forward, and the optimal form of irrigation is provided as well. All these make scientific plan and management of the irrigated area possible.
By calculation, the results have been got as follows:
75%. In P2. The system with the max net profit is the system of small shawllow pumping wells of semi 每fixed sprayed irrigation, and the second is small shallow pumping wells with PVP pipes. Under the precondition of assurance of water source, the system of small original well 每 electric pump 每 original trench can be used as supplement. So, what we should develop is the system of small shallow pumping wells of semi 每fixed sprayed irrigation or that with PVC pipe, not the system of shallow well 每 electric pump 每original trench.
75% typical year, the supply of groundwater is enough. But in the dry years of P