Rational Allocation Of Ecological Water Based On Ecological Red Line

Now,Economic and social water consumption of a large number of ecological water,resulting in a sharp reduction in ecological water use.The deterioration of the ecological environment these consequences have seriously affected the normal production and life of mankind,this paper explores the related research on ecological water use.This article is based on the national water special subject,taking the Songhua River Basin in Harbin as the research area,collectingdata such as terrain,land use type,NDVI,meteorological data(temperature,precipitation,wind,evaporation,etc.)population and socioeconomic data and so on.According to the Ministry of Environmental Protection issued by the "ecological protection of red line technical guide" and Heilongjiang Province Environmental Protection Office and the Heilongjiang Provincial Surveying and Mapping Geographic Information Bureau jointly prepared and issued the "Heilongjiang Province,the implementation of ecological protection red line implementation plan",then the ecological red lines were divided into the study area.On the basis of these,calculate the amount of ecological water and forecast the ecological water demand in 2020 and 2030 based on Harbin in the long-term planning.And finally put forward the rational allocation scheme of ecological water under the restriction of ecological red line.Conclusion as below.(1)Three types of ecological red line areas were identified,they are water conservation red line area,soil and water conservation red line area and sensitive red soil area of soil erosion.Each accounted for 30.19%,0.39% and 8.55% of the study area,And finally get an integrated ecological red line area of 1509km2,accounting for 31.07% of the total area。(2)The results of ecological water use are shown:In 2014,the lowest ecological water consumption in the study area was 91.265 × 108 t.Non-winter ecological water consumption accounts for 74.04% of annual ecological water consumption,winter ecological water consumption accounts for 25.96% of annual ecological water consumption.The proportion of river ecological water is the largest among them,reach63%,The main reason is that Songhua River is the main water source and drainage of water,to maintain the healthy operation of urban ecosystems play a vital role.Therefore,To ensure that the basic ecological water use of rivers is the most important ecological water conservation.Wetland ecological water accounts for 23% of total ecological water use,indicating that a large number of rivers,lakes and swamps in the study area require more ecological water for maintenance.Vegetation ecological water consumption is 10%,which indicated that the natural evapotranspiration of vegetation in the study area accounted for a small proportion of ecological water and gricultural water-saving space.Urban Greening and Environmental Sanitation Ecological water consumption is based on minimum consumptionwhich accounting for4% of total ecological water。(3)The rational allocation of ecological water is:Based on the results of ecological water demand forecast,The minimum ecological water requirement in the study area is124.32 × 108 t andthe maximum ecological water requirement is 143.756 × 108 t in2020.The minimum ecological water requirement in the study area is 137.953×108t and the maximum ecological water requirement is 180.521 × 108 t in 2030.To the ecological red line area as a constraint,in 2020,the ecological water in the red line area is 44.66×108t/a,non-red line area accounted for 68.93% of the total area of the study area,and the ecological water consumption is 85.69×108t/a;In 2030,The ecological water in the red line area is56.09×108t/a and the water consumption of non-red line area is 95.09×108t/a。...