Impact Of Industrial Structure On Environment In Danjiangkou Reservoir Area

To clarify the Danjiangkou reservoir industrial structure of the environmental impact of the effect,and to clear differences in the water quality around the different industrial zones and the environmental effects of industrial structure changes in all counties,and to understand the impact of rural life energy on the surrounding water quality in the area where the major tributaries of the reservoir area are located,with a view to providing a theoretical basis for the reservoir area to seek a better mode of green economy development。The paper takes the Danjiangkou Reservoir area,the main area of water source in the middle line of the South-to-North Water Diversion Project,as a typical area,and collects data obtained through field year sampling data and field surveys,and uses ecological environmental impact index method,ecological footprint emission coefficient method,etc.The impact of industrial structure evolution on the environmental effects of Danjiangkou Reservoir District was compared.At the same time,the GHG emissions and energy ecological footprint of the energy consumption in the study area,as well as the grey water footprint and environmental economic cost of rural life were also calculated.Water pollution in different industrial zones in major watersheds of water sources.This study can be described as a theoretical basis for environmental protection in the reservoir area,and based on the analysis and demonstration,environmental control measures and governance advice based on industrial structure are proposed.Research indicates:(1)The urban industrial structure of Shiyan City and Danjiangkou City accounts for more than half of the secondary industry and the industrial structure is “second,third,and one”.Luxi County,Fang County,Zhushan County,and Zhuxi County prevailed prior to 2008 and their industrial structures were "1,3,and 2",after which they changed to "3,1 and 2".Zhushan County was "2,3,1" Zhuxi County is "2,1 and 3".Juxian County has a similar proportion of three industries.The proportion of secondary production in Luanchuan County and Xixia County exceeds 50%,and the industrial structure changes from “second,first,and third” to “second,third,and one”.(2)The evolution of industrial structure in the study area has a great relationship with the change of the ecological environment.The succession of industrial structure in each county and city corresponds to the change of ISE index,and the proportion of the secondary industry has a negative effect on the environment.The environmental impact ratings were: The reservoir area was weaker before 2006,and the negative impact was continuously reduced.After 2006,the negative impact gradually increased,and after 2009,the negative impact reached a moderate level.Danjiangkou City was less than 2.5 before 2004,and gradually increased beyond 2.5 after 2004;Daixi County was weak overall;other counties were weaker before 2009 and moderately thereafter.(3)Rural household energy in the reservoir area is generally a combination of traditional energy and commodity energy,and has a greater dependence on biomass energy.The utilization rate of straw and firewood is as high as 99.6%.100% of households use electricity,and gasoline and diesel are used separately.It is 57.88% and 16.72%,mainly used for transportation and agricultural production.(4)In the rural household energy ecological footprint of the reservoir area,the absolute advantage of power footprint is 85.54%,and the ecological footprint of fuelwood and straw is 12.61%.(5)The areas where the output value of the primary industry accounts for a large proportion of GDP have a greater impact on the biomass energy consumption.The secondary and tertiary industries account for a relatively large area and have a greater impact on the energy consumption of commodities.When the proportion of output value of the secondary industry is dominant,the impact on commodity energy EF is greater.Compared with the other three industrial models,under the "three,one,and two" model of industrial structure,the impact on biomass energy EF is the smallest,the impact on power EF is the greatest,and the other is moderate.(6)Total nitrogen is the main factor of water pollution in the reservoir area.The content is similar in summer and winter,and the COD content in summer is obviously higher than that in winter.The pollution status in different industrial areas is ranked from big to small: industrial areas,livestock and poultry breeding areas,living source areas,farmland areas,and forest areas.(7)The contribution of various industries to the surrounding winter water quality TN,TP and NH4+-N is generally from large to small: the secondary industry,the tertiary industry,and the primary industry.The impact of various industries on the surrounding winter water COD content from the largest to the smallest is the second industry,the first industry,and the third industry.Each industry contributes to the summer COD and NH3-N content from large to small: the tertiary industry,the secondary industry,and the primary industry.For the impact of TN and TP distribution,the secondary industry,the tertiary industry,and the primary industry are the largest to the smallest.