Research On The Profit And Loss Of Ecological Economy In The Process Of Urbanization In Chongqing

In recent years,ecological environment has been destroyed owing to large-scale urbanization development and construction in promoting regional socio-economic development.The quantitative evaluation of the ecological and economic benefits by visualization in the process of urbanization is significant.This paper take Chongqing city as example,using land remote sensing interpretation data,soil data,elevation data,meteorological data,socioeconomic statistics in the year of 2000,2005,2010,2015,evaluate the change of urbanization.Combining with InVEST 3.3.1,Arc GIS 10.1 and SPSS 19.0 software to assess habitats,soil conservation,water conservation,carbon sequestration,regulating climate,purifying environment these six types of ecological benefits and primary industry,secondary and tertiary industries economic benefits,and analysis of the landscape pattern of land use,five big functions,39 counties during the four research periods of ecological economic benefit of space and time changes.Finally,this paper analyzes the influence of urbanization process on the profit and loss of each ecological economic benefit in the study area by using the landscape pattern change and ecological economic benefit.The main conclusions are shown below:(1)From 2000 to 2015,it showed the increasing number of of the woodland,construction land,water body and unused land,while the proportion of farmland and grassland decreased.The landscape structure tended to be diversified.The fragmentation and spatial distribution occurred.The expansion of urbanization,specifically,composed of farmland and woodland,and occupies larger proportion of woodland.(2)The average value of habitat quality index was 0.9674 in 15 years.The quality of the habitat was polarized,and the total value of the biological habitat showed an increasing trend,from 91.77 billion yuan in 2000 to 94.21 billion yuan in 2015.The habitats value in southeast and northeast area was high,while it is low in Midwest area.(3)The high value area of soil conservation is concentrated on Daba Shan-Wushan-Qiyan Shan-Wuling Shan,while the Midwest regions are low retention areas.Soil retention and soil conservation value has been increased to 2.39 × 108 t,62.14 billion yuan within 15 years.(4)The value of water conservation is relative high at southeast and northeast of research area,while is relative low at west-central of research area.The amount of water conservation increased to28.55×108m3 and the value of water conservation increased by 101.314 billion yuan within 15 years.(5)The largest Carbon storage located in the zone of northeast and southeast mountains which with high altitude and high vegetation coverage.While there were small carbon storage in other area.The net carbon storage increased by 0.26×108t within 15 years,and the value of carbon storage increased by 30.39 billion yuan during the research period.(6)The climate value in study area tended to increase.The regulating value of the climate and the environment purification were increased by 354.21 billion yuan and 57.33 billion yuan respectively.(7)The first industry field was concentrated in the central and western areas which with flat topography and good conditions for farming.On the other hand,the second and tertiary industry field was concentrated in the urban area and built-up areas.The output value of the first,second & tertiary industries in research areas present an upward tendency,which increased to 1269.89 billion yuan in first-industry area and 1.23 trillion yuan in second and tertiary industry area.(8)In general,there was an increasing trend of ecological benefit and economic benefit.They increased to 16 94.18 billion yuan and 125 56.47 billion yuan separately;the proportion of economic benefit is increasing every year as well.The proportion of the eight qualities of ecological and economic benefit were: value of water conservation> value of secondary and tertiary industries > value of primary industry > value of regulating climate > value of carbon storage > value of soil conservation > value of environment purification>value of habitat.(9)There was an increasing trend of urban region's ecological benefit and economic benefit in 2000?2005?2010 and 2015,which increased to 392.16 billion yuan,875.50 billion yuan,2326.88 billion yuan and 5809.23 billion yuan.Other land use types were occupied by urban land which was up to 2211.29km2,the overall ecological and economic benefits increased to 2884.40 billion yuan.While the value of carbon storage ?environment purification?habitat?regulating climate were reduced to 3.19 billion yuan?1.84 billion yuan?2.55 billion yuan and 11.07 billion yuan.