基于DPSIR模型的土地整治规划环境影响评价

目的]对甘肃省庆阳市20个土地整治规划环境影响进行评价,为黄土高原山区的土地整治项目环评提供借鉴。方法]基于DPSIR(驱动力—压力—状态—影响—响应)模型,建立科学合理的评价指标体系,对庆阳市20个土地整治规划项目环境影响进行评价。结果](1)人均GDP与新增耕地量对土地整治变化具有较强的驱动作用;土壤污染情况对生态环境的压力最为突出;城市的森林覆盖率对项目区土地资源状态有重要影响;公众对环境的满意度对各类土地整治变化及其人口、资源和环境所产生影响相对突出;固体废弃物综合利用对环境影响的响应最突出。(2)研究区域环境影响的综合评价最大值和最小值分别为镇原县山岔镇周家庄土地整治项目(0.256 9)和庆城县太白梁乡庙山土地整理项目(0.130 4)。结论]各个项目区的综合指标基本在0.150 0~0.250 0浮动,说明庆阳市20个项目区生态环境提升潜力较大。

Impact Evaluation of Land Consolidation Planning on Environment Based on DPSIR Model

Objective] Land renovation and the subsequent environmental impact were assessed in 20 land consolidation plans in Qingyang City of Gansu Province to provide a reference for environmental impact assessment by land consolidation in the mountainous area of eht Loess Plateau.Methods] Based on the DPSIR(driving-force-pressure-state-impact-response) model, a scientific and reasonable evaluation index system was established to assess the environmental impacts of land consolidation in Qingyang City. Results] (1) The per capita GDP and the increment of arable land had strong driving effect on land change. Impact on ecological environment was prominent by land pollution. City''s forest coverage had an important effect on variation of land resources. People''s feeling to environment was important with regard to land management, and the interlinks among population, resources and environment, as well. The impact of comprehensive utilization of solid waste was mostly important. (2) The maximum comprehensive environmental impact of land consolidation was assessed at 0.256 9 in Zhoujia village, Shancha Town, Zhenyuan County, and the minimum one was assessed at 0.130 4 in Miaoshan mountain, Taibailiang Town, Qingcheng County. Conclusion] The comprehensive indexes of all the 20 consolidation areas largely varied between 0.150 0 to 0.250, indicating that the ecological environment in Qingyang City has great improvement potentiality.