Water Resources Evaluation And Development And Utilization Scheme Of The Plain Area Of Liuhe River Basin In Liaoning Province

Liaoning Liuhe River Basin plain area is located in the northern part of Liaoning Province,including changwu County and part of Xinmin City.In recent years,under the influence of environmental,climate and human factors,Liuhe River often dries up.Therefore,"finding out the bottom of the family,predicting development and proposing new development and utilization plan"has a far-reaching impact on the sustainable development of water resources and regional water resources planning and management in the Plain area of Liuhe River Basin.Demand for the above this paper collected a large number of hydrology and meteorology,the groundwater dynamic,such as basic data,river basin plain geology and hydrogeology survey basic work done,ha yu river basin plain water resources assessment,water demand forecast,the forecast of water supply and the supply and demand balance analysis,and aims at ha yu river plains possible water shortage situation in 2025,2035,The scheme of increasing the exploitable amount of groundwater and reducing the water demand of water resource utilization in the area are put forward..The specific conclusions are as follows:(1)Evaluation of water resourcesThe surface water resources and groundwater resources are calculated in the plain area of Liuhe River Basin.The average amount of surface water was 4439.98×10~4m~3/a by runoff depth method.The average amount of groundwater resources is 19852.6×10~4m~3/a by using groundwater equilibrium method,The recoverable amount of groundwater is 13949.9×10~4m~3/a.The repeatability of surface water and groundwater in the study area is 4342.1×10~4m~3/a,The average annual total water resources in the plain area of Liuhe River Basin is 19950.4×10~4m~3/a.(2)Supply-demand balance analysisAnalyze the annual water supply,water demand and its development trend,Using water quota method The water demand in the planning level years(2025 and 2035)was predicted.The analysis results showed that the water demand in the study area was11067.3×10~4m~3/a in the current level year(2020),which would increase to 13915.6×10~4m~3/a in 2025 and 15401.1×10~4m~3/a in 2035.The total available water supply in the study area is 14909.5×10~4m~3/a.The balance between supply and demand in the study area was analyzed.The analysis results show that the water supply capacity in the present level year(2020)basically meets the water demand;By 2025,there will be water shortage in Xinmin City.By 2035,water shortages will increase even further.(3)Water resources development and utilization scheme design.Based on the prediction results of possible water shortage in Xinmin city,two water resources development and utilization schemes are proposed.Scheme 1:To increase the exploable amount of groundwater scheme:it is planned to build 200filtration and recharge Wells on the floodplain on both sides of liuhe river channel in Xinmin City in the study area to intercept the rain flood that is difficult to be utilized in the flood season.This scheme can increase the groundwater recoverable amount by1011.1×10~4m~3/a,785×10~4m~3/a and 678.5×10~4m~3/a in wet year,normal year and dry year respectively.Scheme 2:reduce the water demand of water resources in xinmin City of the study area:it is planned to carry out water-saving transformation for the sections still using flood irrigation at present.Drip irrigation under membrane is proposed.After water-saving reconstruction,agricultural water demand can be reduced by 496×10~4m~3/a.Based on the analysis of supply and demand balance,zhangwu County will be located in the study area by 2025 and 2035.