Evaluation Of Water Resources Carrying Capacity Based On Extension Model And Optimal Allocation

Water system in Heilongjiang province is developed,and it is an important grain production base in China,which is responsible for ensuring national food security.In recent years,grain production has made great achievements,but with the rapid growth of population,living standards and economic and social development,the shortage of water resources has become the bottleneck of China's national economic and social development,some areas of the province,there is a problem of groundwater level decline of groundwater,the destruction of the ecological environment etc.In view of the current situation of the development and utilization of water resources in Heilongjiang Province,Heilongjiang in order to achieve the sustainable utilization of water resources as the guiding ideology of the administrative district of Heilongjiang province to grade evaluation of water resources bearing for agricultural water in Jiamusi area is in a weak state of stress of water resources carrying capacity multi-objective optimization allocation for each administrative region of water resources in Heilongjiang province sustainable exploitation and utilization of Jiamusi agricultural irrigation water allocation of water provides a certain theoretical basis.The main research contents and conclusions are as follows:(1)Based on the present situation of water resources development and utilization in Heilongjiang province and the present situation of water conservancy projects,the paper compares the research methods by referring to the literature.According to the information entropy theory and Extenics Theory to establish the water resources carrying capacity evaluation model,constructing the evaluation system of water resources carrying capacity,this is consistent with the Heilongjiang province water resources carrying capacity evaluation index,research on the bearing capacity of the 13 administrative regions of water resources,analyzed and calculated the comprehensive evaluation grade of the relationship the administrative area of the water resources carrying capacity of.Water resources in Heihe and Greater Khingan Range area of Mudanjiang,the bearing capacity of the best in class I,for strong pressure;Daqing and Yichun were in grade II,weak non pressure state;Harbin and Qitaihe were in grade III,the development and utilization of water resources and social development in a state of balance;Jiamusi,Qiqihar,Jixi,Hegang,and Shuangyashan Suihua is in the grade,the weak state of stress.Which are in the same level of carrying capacity of Jiamusi,Qigihar,Jixi,Hegang,Shuangyashan and Suihua and other regions of the water resources,according to its rank variable characteristic value,that the six administrative regions of the water resources carrying capacity are in favor of grade III,deviation degree is thesize of Suihua > Qigihar > Jiamusi > Jixi > Shuangyashan > Hegang,showed the six administrative regions of water resources in the bearing capacity under weak pressure under the condition of development potential.Jiamusi,Qigihar,the bearing capacity of Jixi,Hegang,Shuangyashan and Suihua and other regions of the water resources are IV,according to its rank variable characteristic value,are in favor of grade III state capacity among the six administrative regions of water resources,the degree of bias:Suihua > Qiqihar > Jiamusi > Jixi > Shuangyashan > Hegang,showed the six administrative regions of water resources in the bearing capacity under weak pressure under the condition of development potential.(2)Taken the Heilongjiang plain of Sanjiang province grain producing areas of agricultural water supply in Jiamusi as an example,and based on a fast and elitist non dominated sorting genetic algorithm NSGA-II(Non-dominated Sorting Genetic Algorithm-II)the multi-objective optimization model,and puts forward the method of multi sources of water supply in many crops in different water conditions.Use NSGA-? to solve the multi-objective optimization model,calculated three kinds of water under different water supply schemes on a number of different crops,selected three scheme of tradeoff analysis of economic and environmental aims,the economic objectives of the program is a high water situation in 8.888×109yuan and target environment 5.881×106 kg,scheme two respectively is 8.80×109yuan and 5.805×106 kg,scheme three respectively is 8.556×109 yuan and 5.745×106 kg decision can according to the actual situation of preference or choose the appropriate scheme as decision,can provide the basis for the local agricultural water resources planning.The model considers the combined operation of surface water and groundwater,the combined water supply of crops,obtained under different inflow water multiple water supply schemes of crops.In short,this paper based on the entropy weighted matter-element model to determine the administrative area water resources carrying capacity,comprehensive reflection of the water resources carrying capacity of each administrative region and regional differences,have a general understanding of the administrative region of water resources in Heilongjiang Province,the overall level of utilization.Aiming at the weak pressure carrying capacity of water resources in Jiamusi City,the development and utilization of water resources in groundwater level decline,deterioration of water environment,using the multi-objective optimization model based on NSGA-?,for a plurality of surface water and groundwater water distribution scheme of three kinds of water situation,to provide a theoretical guidance for the sustainable use for the protection of Jiamusi area comprehensive benefit and optimization of agricultural water resources.