Multi-effect Coupling Optimization Design Of The Plain Reservoir

The water resource in our country is not abundant, the occupancy per head of which is less. What’s more, the water occupancy per head is about one fourth of the world’s average level. Nowadays, the water occupancy per head in 16 provinces in china is lower than severe water deficiency line and 6 provinces or regions’ water occupancy per head is lower than 500 cubic meter, which is called extreme water deficiency area. The water resource which is a indispensable element for industrial and agricultural production、personal life and ecological condition has become the critical factor for china’s social economy’s development. The best solution for the problem above is to construct some plain reservoirs, but there are lots of universal matters such as big reservoir area、shallow water height、improper dam’s height、fine particles of dam construction、heavy useless evaporation with the restrictions from land、capital and soil material. So the plain reservoir is far away from its optimal state.Based on the functional properties of plain reservoir, this paper analyses many acting factors for the design of plain reservoir, such as surrounding dam’s arrangement form、height of dam、properties velocity of reservoir surface、reservoir’s annual evaporation and leakage、slope protection forms、anti-seepage forms、dam’s safety grade and ecological grade and water-storage depth of dam with the plain reservoir’s safety、adaptability and economics in the general consideration. After the work above, it make a plain reservoir’s Multi-effect coupling optimization design’s mathematical model.This paper analyses the mathematical model’s construction’s analysis method, which uses the probability method of probability to study the reliable performance of plain reservoir in the real environment. This method makes the minimum water supply cost per cubic meter as objective function and dam’s height H friction angle of soil material of dam constructionα、roughness of slope protection n、wind velocity of reservoir surface Vf、reservoir’s annual amount of evaporation ES、ecological grades as decision variables to set up a Multi-effect coupling optimization design model of plain reservoir based on reliability theory. What’s more, this thesis does a optimization analysis for shuangwangcheng reservoir in shandong province under the following four design conditions:square、circular surrounding dam with film-laying covering the bottom for seepage prevention, square、circular surrounding dam with cut-off wall for seepage prevention with genetic algorithm, and the results show that theplain reservoir’s construction is on the basis of certain reservoir storage. The paper check out the sample from plain reservoir’s Multi-effect coupling optimization design model with neural network algorithm and to evaluate the grade of plain reservoir’s optimization design scheme,and it shows the neural network’s forecasting results possess high accuracy. Finally, it analyses each factor that influence the plain reservoir’s optimization with the Analysis Hierarchy Process and conclude the key factor for the plain reservoir’s optimization, and make a theoretical support for plain reservoir’s Multi-effect coupling optimization design.