WANG Yong, YANG Yankun, CHENG Xian, et al. Sensitivity of Soil Conservation Function to Land Use Change[J]. 2020, 34(6): 22-29.
DOI:
WANG Yong, YANG Yankun, CHENG Xian, et al. Sensitivity of Soil Conservation Function to Land Use Change[J]. 2020, 34(6): 22-29. DOI: 10.13870/j.cnki.stbcxb.2020.06.004.
Sensitivity of Soil Conservation Function to Land Use Change
land use cover deeply influences the surface vegetation and surface runoff
which leads to the change of soil conservation. Taking Chongqing as a case study
the soil conservation change trend was studied by the trend analysis method and the sensitivity of soil conservation to land use transition was analyzed by the cross-sensitivity coefficient method. The results showed that: (1) The land types in Chongqing were mainly forest land and dry land. From 2000 to 2015
the area of forest land
bare land
construction land
and water increased
while the area of dry land
grassland
and paddy field decreased. The construction land had the largest increase
mainly from dry land and paddy fields. The dry land had the largest decline
mainly converted into construction land and forest land. (2) From 2000 to 2015
the amount of soil conservation in Chongqing increased
but the growth trend was not linear. The soil conservation with extremely significant and significant increase accounted for 21.85% of the total increase area
respectively
while those with extremely significant and significant decrease were 0.10%
and the rest was not changed basically. The increased and significantly increased areas were mainly concentrated in the dry land and forest land with an altitude of 500~1 000 m
while the decrease and significant decrease areas were mainly in the dry land below 500 m above sea level. (3) The transitions of dry land to grassland and paddy fields to forest land were the most sensitive land conversion types with sensitivity coefficients of 11.01 and 6.73. The transitions of dry land to bare land
paddy fields
and water
forest land to water and bare land
and grassland to water
bare land
and forest land was sensitive
and their sensitivity coefficients were higher than 1.
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Related Institution
Chongqing River Affairs Center
Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences
Sichuan Provincial Key Laboratory of Philosophy and Social Sciences for Monitoring and Evaluation of Rural Land Utilization, School of History and Geography, Chengdu Normal University
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Jiangsu Jiawang Resource Exhausted Mining Area Land Restoration and Ecological Succession, Ministry of Education Field Scientific Observation and Research Station