| Driven by climate change and human activities,China's water shortage,serious water pollution,water ecological deterioration and other water problems are increasingly prominent.Water resources have become an important factor restricting the sustainable development of China's social economy.Flood resource utilization is a conception put forward under the condition of water resource shortage and contradiction between supply and demand.Due to the need to consider the problem of"ecological economic social system"in medium-sized river basins,flood resource utilization has become a problem.Safe and efficient use of flood resources is conducive to alleviate the situation of water resource shortage in river basins.This paper takes Taoerhe River Basin as the research object,takes the situation of water resources supply and demand tension in Taoerhe River Basin affected by climate and human activities as the background,analyzes and forecasts the water resources supply and demand in different level years,and makes the flood resources utilization plan based on the coupling analysis of water resources time-space difference,which is of great importance to better water resources planning,utilization and management in the basin Reference meaning.This paper mainly carried out the following research work:First of all,this paper analyzes the current situation of water resources utilization in Taoerhe River Basin from the perspective of water use structure and water supply structure.Aiming at the current situation of water resources shortage in the basin,this paper puts forward the water resources utilization planning research based on the analysis of water resources supply and demand.Secondly,based on the analysis of the temporal and spatial evolution trend of temperature,precipitation and runoff in Taoer River Basin from 1958 to 2018 and the division of runoff producing areas,it can be found that the increase of temperature and the decrease of precipitation have certain influence on the reduction of river runoff,and the area above chalson reservoir is the main runoff producing area;at the same time,the typical year method is used to calculate the water supply of Taoer River Basin in different level years,and the wet year(P=25%)the available water supply is 31.05×10~8m~3,the normal year(P=50%)the available water supply is 31.05×10~8m~3 and the dry year(P=75%)the available water supply is 31.05×10~8m~3.Then,take 2015 as the current year,calculate the ecological water demand and economic and social water demand of Taoer River Basin in different level years,and predict the water demand in 2030.When P=25%,the water demand of Taoer River Basin is 28.99×10~8m~3.When P=50%,the water demand of Taoer River Basin is 30.47×10~8m~3.In dry year,the water demand of Taoer River Basin is 31.80×10~8m~3.In 2030,In normal year,the water demand of ecological environment is 8.278×10~8m~3,the water demand of economic society is 24.72×10~8m~3,the total water demand is 33.00×10~8m~3.In dry year,the water demand of ecological environment is 9.145×10~8m~3.The economic and social water demand is 25.90×10~8m~3,and the total water demand is 35.05×10~8m~3.Based on the analysis of the situation of water supply and demand in different level years,the coupling analysis method of water supply and demand is put forward.Finally,based on the spatial-temporal difference of water resources,the coupling analysis of water supply and demand is carried out.The Zhenxi station is selected as the control section according to the current situation of the basin topography and water conservancy project to make the flood resource utilization plan in different level years:the total water diversion volume under the condition of three-year return period(P=33.3%)is 5.04×10~8m~3;the total water diversion volume under the condition of ten-year return period(P=10%)is 8.42×10~8m~3;the total water diversion volume under the condition of two-year return period(P=5%)is 8.54×10~8m~3. |
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