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Study on the Evaluation of Land Resources Ecological Security in Changde City

Author: SuChen
Tutor: WuLiChao;PengBaoFa
School: Central South University of Forestry Science and Technology
Course: Soil and Water Conservation and Desertification Combating
Keywords: Land resources Ecological security Evaluate Composite index method Changde City
CLC: F301
Type: Master's thesis
Year: 2009
Downloads: 61
Quote: 0
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Land resource is the material basis of human survival and development is the most important natural resource and environmental elements , the development of human society can not do without the use of the land and transformation . With the rapid development of China 's social and economic , the growing strength development and utilization of land resources , land resource ecological security issues facing more and more serious . Land resources, ecological security issues become topics at the forefront of the sustainable use of land resources . The set , including the evaluation of natural factors , economic factors , social factors and three 18 ecological land resources in line with the actual situation in Changde City, the use of system analysis , analytic hierarchy process method to establish the basis of the analysis of Changde City Overview safety evaluation index system . The comprehensive index method of Changde City, land resources, ecological security evaluation . The results show that : the comprehensive evaluation of the safety of land resources and ecological value , Changde City from 2003 to 2005 maintained at between 0.7565-0.7595 , ecological security status is good , the warning level is safer . Spatial scales , Changde City in 2007 counties (cities ) , Wuling and Anxiang County ecological security comprehensive evaluation value of the lowest in the sensitive state were 0.5225 and 0.5261 , land ecosystems ; seven other counties (cities ) of land resource ecological security evaluation values ??between 0.69 to 0.80 , the land ecological security in good condition , than the security warning level . Through detailed analysis of the evaluation results , and found a higher rate of forest coverage , lower proportion of the area of ??soil erosion and lower arable land pressure index is the main driving force of the ecological security of land resources in the region . Grassland area the proportion of low and high pesticide application rate of chemical fertilizer and other indicators become the most important limiting factor for land resource ecological security in Changde City, and the counties . This paper puts forward countermeasures and suggestions to protect land resources, ecological security in Changde City .

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