Study on the Affect of Returning Farmland to Forest Project on Regional Ecological Risk in Mudanjiang City
Long-term deforestation and over-harvesting directly led to serious soil erosion and sharp forest deterioration, and the Eco-Environment in Mudanjiang became worse and worse. So the government there took the Returning Farmland to Forest Project (RFFP) firstly in Heilongjiang Province in China in 1999. On the basis of deeply understanding the Eco-Environmental problem of soil erosion and the Ecological Risk Definition, this paper put forward an Ecological Risk Assessment Model with Landscape Indexes and Eco-Environment Resilience. This model firstly calculated the landscape indexes of every sample by fragstats and then obtained the spatial distribution of Ecological Risk by ordinary Kruger interpolation. The results showed that: the landscape fragmentation improved after the RFFP, the EcoEnvironment Resilience increased significantly because the forest area increased obviously and the serious soil erosion was controlled by the high vegetation cover, which in the end made the Ecological Risk drop down rapidly, from 0.003-0.952 to 0.0030.310. The area proportion of minor, slight and moderate risk increased separately from 7.65％. 13.71％ and 21.3g％ to 18.85％. 33.04％ and 33.24％, while the intense and server declined respectively from 31.46％ and 25.7g％ to 14.88％ and O％. In a word, the model possessed advantages of intuition and simplicity and could descript the regional ecological risk quantitatively and its spatial distribution intuitively.
Returning Farmland to Forest Project Regional Ecological Risk Assessment Landscape Indexes Eco-Environmental Resdience Mudanjiang
Fengjie Gao Bai Zhang Zongming Wang Guoping Lei Ge Song
Northeast Institute of Geography and Agroecology, CAS, Graduate University of Chinese Academy of Sci Northeast Institute of Geography and Agroecology, CAS,Graduate University of Chinese Academy of Scie College of Resources and Environment Northeast Agricultural University Harbin, China
国际会议
昆明
英文
452-456
2010-10-17（万方平台首次上网日期，不代表论文的发表时间）