基于RS和GIS的瑞金市生態(tài)用地變化及生態(tài)服務(wù)價值研究
[Abstract]:Ecological land use is a kind of land use which can provide ecological services such as environmental regulation and ecological conservation. It plays an important role in maintaining regional ecological balance and sustainable development. Ruijin is an important ecotourism city in the southeast of Jiangxi Province. With the rapid development of economy, urban construction land continues to expand outwards, at the same time, human activities are frequent, and people change the way of land use. All of these influence the ecological land use in Ruijin to some extent, and the contradiction between ecological land and urban construction land is more and more prominent. With the help of RS and GIS software, the remote sensing images of 20002005 / 2010 and 2014 are classified and interpreted. Combined with the concept of ecological land, ecological land is divided into cultivated land, woodland, grassland, wetland and other land, and land use dynamic degree is used. The changes of ecological land use in Ruijin City during 15 years are studied by mathematical methods such as land use transfer. On the basis of this, the ecological service value of Ruijin City is calculated according to the evaluation method of ecological service value, and the value of individual service is also measured. The relationship between the change of ecological land use and the change of ecological service value is analyzed. Finally, based on the idea of protecting ecological land and improving the value of ecological service, some suggestions are put forward to optimize the allocation of ecological land. The results show that: (1) the number of ecological land in the study area is decreasing year by year, and the speed of the decrease is accelerating. The conversion of each ecological land type in the study area is complex and changeable, and the ecological land use type is becoming more and more unstable. From the overall point of view, the ecological land transfer in Ruijin City from 2000 to 2014 is mainly the conversion of cultivated land, woodland, grassland and construction land. The conversion of forest land to construction land is the main reason for the decrease of ecological land area. (2) through the analysis of the driving force of ecological land use change in Ruijin City, it is mainly manifested in population and economy. The influence of transportation development and policy on ecological land use change. (3) the analysis of ecological service value and individual ecological service function in the study area shows that the value of ecological service in the study area from 2000 to 2014 decreases continuously from 2000 to 2014. From the perspective of ecological land types, different ecological land types show different changing laws. The ecological service value of all kinds of ecological land types generally shows a downward trend, and the ecological service value of cultivated land, grassland and other land use is decreasing year by year. The ecological service value of woodland and wetland changed alternately. In terms of the value of one-way ecological services, soil formation and protection, waste disposal, The decline of ecological service value, such as climate regulation and gas regulation, is an important factor that causes the decline of ecological service value. (4) from the perspective of the direction of ecological service value, the main flow direction of ecological service value in the study area from 2000 to 2014 is as follows: 1. First, the transfer of ecological land, The value of ecological services is slightly reduced by the transfer of woodland and wetlands to cultivated land, grassland and other land use; second, the transfer of ecological land to construction land, and the transfer of all kinds of ecological land to construction land, with a larger transfer area, As a result, the value of ecological services decreased significantly.
【學(xué)位授予單位】:東華理工大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:X24;F301.2
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