Study Of Moderately Optimized Method And Drafting Scheme Of Water Regulation For The Tarim River

The Tarim River is the largest inland river in China. It is droughty in the basinand there is scarce rain and strong evaporation. In recent years, because of theexcessive exploiture and inefficient utility of water resource, the water quantity ofthe lower reaches of Tarim River gets smaller and smaller;the quality of water andecosystem becomes worse and worse gradually.. The severe conditions draw greatattentions of the world. In June 2001, the State Council of P.R. China authorized《Planning Report about recent comprehensive administration in Tarim Watershed》and put forward the plan that advanced scientific and technical method should beused to combine different types of information together for the uniform managementof the water resource in the overall watershed. Accordingly,the ManagementBureau of Tarim Watershed proposed to construct Water Regulation ManagementSystem (WRMS) as a technology support platform. Analyzing the water resourcestatus of Tarim Watershed, methods of drafting water regulation schemes andmoderately optimized means are studied in this thesis.On the basis of the current water regulation experience in Tarim Watershed, thelimit scheme of water usage and the advance scheme of flood season are improved.An automatic method of data update is designed on drafting the ten-day scheme andhas been applied in the 2003-2004 regulation year. The module for recent waterregulation is developed with C-S framework. With friendly interface it ismanipulated easily. It is estimated that the highly practical multi-user, multi-machinemanipulation improves water regulation efficiency.After recent comprehensive administration, the mode of water regulation willturn from once every ten days in flood season to once every month in non-floodseason and once per ten days in flood season. At the beginning of a hydrologicalyear, a water management plan for time scale of one year will replace the limitscheme of water usage. The methods of drafting schemes for time scale of a monthor ten days will adopt data update which has been used in current water regulation.On drafting the schemes for time scale of one year, moderately optimized method isapplied. A principle of water distribution to ecological gates is constituted. On thebasis of the principle, the concept about satisfaction extent of ecological requirementwater is defined and the water division course of ecological gates is optimized.According to the water inflow forecast and the water requirement of everydepartment, a multiple objective optimized model of water regulation is built upaiming at the maximum of the planting benefit and satisfaction extent of ecologicalrequirement water. The model is solved by means of idealized pattern and GeneticAlgorithms (GAs). The model is tested with 2002's data and the results are analyzedin details.On the basis of the traditional Genetic Algorithms, due to the complexconstraint conditions in the model, the concept "compound gene" is put forward andthe operation rules of crossover, mutation are defined, and thus it effectively dealswith the restriction relation between two genes. Besides, the combination of uniformmutation, boundary mutation, non-uniform improves the operational efficiency ofGenetic Algorithms.