贵州省黄果树景区土地生态风险的评价

Evaluation of land ecological risk in Guizhou Huangguoshu scenic area

为了探讨城镇化快速发展的黄果树景区土地利用变化对土地生态系统造成的风险,通过定量分析2000、2005、2010年三个时期土地利用与景观格局动态变化特征,应用土地利用综合指数与景观格局指数建立土地生态风险评价模型,并对黄果树景区土地利用变化的生态环境效应风险进行评价。研究结果表明:黄果树景区近10土地利用变化主要表现在城镇建设用地的增长,而耕地面积则不断在减少,城镇化发展比较迅速;黄果树景区土地生态风险指数不断在增加,土地生态风险指数上升了0.0496。城镇建设、道路等基础设施建设以及景区土地利用结构调整是景区生态风险变化的主要影响因素。

This study was conducted to explore the risk of the changes of land use of Huangguoshu scenic area to the ecosystem, where showed a rapid development of urbanization. The land use and landscape pattern dynamic change characteristics were investigated in 2000, 2005 using application of comprehensive index of land use and landscape pattern index to establish a land ecological risk assessment model. The results show that the land use of Huangguoshu scenic area was changed into urban construction, and cultivated land area was dwindling. Urbanization showed a rapid development. The land ecological risk index in Huangguoshu scenic area was increased by 0.0496. The changes of urban construction, roads and other infrastructure were the main factors affecting the ecological risk change.