沽源县生态用地重要性识别及生态用地类型划定

Recognition of Ecological Importance for Ecological Land and its Division in Guyuan County

识别出对维护区域生态稳定具有重要作用的生态用地,对于区域生态建设与保护具有重要指导意义。本文以地处农牧交错带的河北省沽源县为例,对沽源县生态用地的重要性等别进行了综合识别。研究结果表明,生态重要性等别为极重要、重要、较重要以及一般重要的生态用地面积分别为29142.27 hm2、103625.46 hm2、58865.22 hm2和8147.88 hm2,分别占沽源县生态用地总面积的14.59%、51.87%、29.46%和4.08%。从空间分布上看,重要性等别为极重要的生态用地主要集中在县域南部与东南部。从生态用地类型角度分析,沽源县水源涵养型生态用地、土壤保持型生态用地、灾害防护型生态用地以及可适当开发型生态用地的面积分别为4918.23 hm2、96522.36 hm2、19028.76 hm2和79311.48 hm2,分别占生态用地面积的2.46%、48.32%、9.52%和39.70%。

The recognition of critical ecological land is very important for the ecological construction and protection of ecological environment. This study used Guyuan County in Hebei Province （a transition ecotone between agriculture and animal husbandry with severe ecological problems） as a sample to recognize the ecological importance of ecological land. The result showed that the area of ecological lands belonging to very important, important, relatively important and less important was 29142.27 hm2, 103625.46 hm2, 58865.22 hm2 and 8147.88 hm~, respectively, and accounting for 14.59%, 51.87%, 29.46% and 4.08% of the total ecological land. The ecological land with the very critical level mainly distributed in the south and southeast of Guyuan County. The area of water conservation ecological land, disaster protection ecological land, soil conservation ecological land and ecological land that can be appropriately developed were, respectively, 4918.23 hm2, 96522.36 hm2, 19028.76 hm2 and 79311.48 hm2, accounting for 2.46%, 48.32%, 9.52% and 39.70%, respectively.