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Study On Spatial-temporal Differentiation Of Land Ecosystem Service Value And The Driving Factors In Hubei Province

Posted on:2016-11-13Degree:DoctorType:Dissertation
Country:ChinaCandidate:Y ChenFull Text:PDF
GTID:1109330473454905Subject:Land Resource Management
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Promoting ecological progress had been enrolled in the national development plan on the Eighteenth National Congress of the Communist Party of China. As a important component of socialist construction, promoting ecological progress plays the same role as economic development, political building, cultural building and social development. Under the new normal, resource and environment carrying capacity of our country had reached or been closed to the limits, so the green, circulation, low-carbon economy’s development should be taken seriously in the future. To evaluate the ecosystem service value, explore the rule of spatial-temporal differentiation and driving factor, we can not only give the support for the decision-making of land use planing and ecology economy coordinated development, but also can provide references for ecological compensation and Green GDP assessment.The Yangtze river and Han river run through the Hubei province, known as "land of thousands lakes", "land of honey and milk", whose lakes and rivers all around. Hubei province is also a major production base of grain cotton oil and freshwater products. Meanwhile, the world-famous Three Gorges hydro project and the core headwater area for middle-line project of south-to-north water diversion locate in Hubei province. So Hubei province has a very important position in ecological environment. To evaluate the ecosystem service value of the land and explore the rule of spatial-temporal differentiation and driving factor of Hubei province, we can provide references for the optimization of the land use structure and coordinating the relationships of ecological environment and economic development. In this paper, there are three objectives. Firstly, based on the land use data of 2000,2005,2008, through investigating the characteristics of the land use change on the perspective of the main land use change type and ecological function area, the rule of the land use change of Hubei province was summarized. Secondly, the paper evaluated the ecological service value of the land use in Hubei province, and revised the result based on the vegetation coverage by NDVI. Then we analyzed the characteristics of spatial-temporal differentiation of ecosystem service value, and revealed the rule how the land use change impact on the ecosystem service value. Lastly, the coordinate development level of ecology and economy was estimated base on ecological function area. Thirdly, the paper analyzed the driving factor of the ecosystem service value of the land use by geographically weighted regression model, revealed the characteristics of spatial-temporal differentiation of the impact. According to this, some suggestions were provided for the sustainable development of Hubei province. Results are as follows:(1) During the period 2000-2008, the main characteristics of land use change in Hubei province is that:the area of the forest land, grassland and cultivated land decreased severely. The waters and the construction land increased. From different period of time, cultivated land and waters experienced from the decreasing or increasing to slow down respectively, but the construction land had been increased, the forest land and grassland had been decreased sustainably.(2) On the perspective of the main land use change type, the main characteristics of land use change in Hubei province is that:the construction land and waters expanded and a large number of cultivated land converted to the forest land in western Hubei. The main concentration of the construction land expanded is around cities which are located in the mid-east region of Hubei, especially in Wuhan. The main concentration of the waters expanded is in the plains and mound of north Hubei, especially in Jianghan plain. From different period of time, the waters expanding and cultivated land converted to the forest land mainly happened in 2000~2005, which was impacted by the ecological restoration project started after the flood in 1998. In 2005~2008, the construction land just began to expand widely, but the expansion of waters and forest land began to slow down.(3) Based on the ecological function area, the characteristics of land use change of every area were summarized as that:with the impounding of Three Gorges Project, the decrease of the forest land and increase of the waters were both obvious in Three Gorges Reservoir Region, which is a conjugation relationship. Increase of the construction land and decrease of the cultivated land in Qingjiang River Basin and Shinyan region is also a conjugation relationship, which was impacted by the economic growth. The variation of the land use in Dabashan mountains area was relatively small. After the flood in 1998, returning farmland to lake Project was implemented, but the sustainability was weak, the increase of Jianghan plain mainly happened before 2005. After 2005, the construction land expanded widely all over the place. In eastern Hubei, Wuhan Metropolitan Area is the concentration of the land use converted, but the change of the land use in the mountain area of north and south was relatively less.(4) Based on the raster data of land use of Hubei in 2000~2008, ecosystem service value was evaluated according to "equivalent value per unit area of ecosystem services in China" and revised the result based on the vegetation coverage by NDVI. The characteristic of the ecosystem service value of Hubei province shows a "western-high, mid-low, eastern-medium" hierarchically distributed structure was formed.(5) Based on Moran’I index, we analyzed the characteristic of clustering of ecosystem service value, the results show that:the clustering of ESV was intensified during 2000~2005, but weakened during 2005~2008. In 2008, the clustering is most obvious. The high value clustering area was mainly located in Qingjiang River Basin area and Dabashan mountains area. The low value clustering area was mainly located in the plain area and low mountain and hills areas. Fangxian County in Dabashan mountains area was a low-high outlier, but Diaocha lake area in Jianghan plain and longgan Lake in the plain in eastern Hubei were high-low outlier.(6) Investigating the characteristics of spatial-temporal differentiation of ecosystem service value, the results show that:overall, the ecosystem service value of Hubei province experienced a process from increase to decrease. During 2000~2008, the area with ecosystem service value decreasing was mainly located in the plain area. The ecosystem service value of mountain area increased on the contrary. From different period of time, during 2000~2005, the most area had been increased, especially in mountain area. But in this period, the area with ecosystem service value decreasing was little, especially located in Wuhan city region. During the year of 2005~2008, the situation was in reverse. The increasing area turned into the minority, mainly located in Qingjiang River Basin area. But the decreasing area turned into the majority.(7) Based on the ecological function area, the characteristics of the ecosystem service value change of every area were summarized as that:the area with the highest ecosystem service value was located in Dabashan mountains area. The ecosystem service value of Shinyan region increased most, but only The ecosystem service value of Qingjiang River Basin area maintain sustainable growth, that of Dabashan mountains area and Three Gorges reservoir area began to decrease after 2005. In eastern Hubei, the ecosystem service value of most areas maintain low growth except Tongbaishan mountains area. Remarkably, the ecosystem service value of Jianghan plain (Jingzhou region) even decreased during study period, the ecosystem service value of eastern Hubei also experience a process from increase to decrease. The difference is that both the range of increase and decrease is small compared with middle Hubei.(8) Bring in eco-economic harmony index, the eco-economic harmony index was estimated and compared from different area in Hubei province. The results show that:the eco-economic harmony index of most areas maintained a harmony level except Jianghan plain (Jingzhou region). From the different period, most area experienced a process from a high harmony level to a low harmony level even a conflict status. Shinyan region and Qingjiang River Basin area were the areas with the highest eco-economic harmony index, which were the only areas maintain sustainable growth in the whole study period. But Dabie mountains area whose eco-economic harmony index is the highest was a harmony level of low growth, and turned into conflict status after 2005. The eco-economic harmony index of Wuhan region and Dahongshan mountains area maintained low level because of low growth of ESV. The same situation occurs in Three Gorges reservoir area, but that is the reason of rapid growth.(9) Geographically weighted regression model was employed to reveal spatial variation of the impact of socio-economic and geographical location factors on ecosystem service value, and explored the practical significance of the phenomenon behind. The results show that:the impact of agriculture on ESV was generally negative, especially in the transitional zone that from mountains area to plain area. The impact of forestry on ESV was generally positive, especially in the mountains area with high vegetation coverage. The impact of fishery on ESV was positive especially in the plain area with lakes, but not obvious in other areas. The impact of the secondary industry on ESV was not obvious but in eastern Hubei, especially in the southeast area of Wuhan metropolitan area. The impact of the secondary industry on ESV was generally negative, especially in the Jianghan plain and Wuhan metropolitan area with dense population. The impact of the urbanization on ESV was not obvious in most areas, especially the region with low level of urbanization in western Hubei. On the contrary, in the Wuhan metropolitan area with high urbanization, the impact present positive. The impact of altitude on ESV was generally positive, and the degree weakened as altitude increased. The impact of the distance of city on ESV was not positive in most area, especially in Wuhan metropolitan area with developed city. the distance of river had certain influence on ESV in some area, but the essential reason is still the altitude. The transportation road construction had negative influence on ESV in ecological sensitive area. But on the other hand, the transportation road construction also can bring more investment and promote local economic development, and then upgrade industries and release the pressure of resource and environment. Therefore, the transportation road construction has positive influence in some area instead.(10) At last, based on the conclusion above, the paper provide some differentiation suggestions for the land use plan and the sustainable development of Hubei province.
Keywords/Search Tags:Land use change, Ecosystern service value, Spatio-temporal differentiation, Driving factors, Hubei province
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