基于地质条件的生态保护重要性评价——以青海东部大通地区为例

Importance evaluation of ecological protection based on the geological conditions:taking the Datong area in eastern Qinghai as an example

为明确青海东部大通地区的生态保护目标,划定生态保护核心区域,在ArcGIS空间分析功能支持下,以地质条件对生态系统的控制作用为基础,利用层次分析法从生态脆弱性和生态系统服务功能重要性两方面开展大通地区生态保护重要性评价。结果表明:大通地区生态保护重要性极重要区主要沿达坂山、娘娘山北西向分布,面积占比29.27%;重要区分布在宝库河两岸的国家公益林、自然保护区、饮用水源保护区等区域,面积占比44.97%;一般重要区分布在北川河两岸,面积占比25.76%。基于地质条件开展的生态保护重要性评价能更加精确反映研究区内的生态现状和功能特点,可为分区分类开展生态保护及构建绿色生态保护屏障提供科学依据。

In order to clarify the ecological protection objectives of Datong area in eastern Qinghai and delineate the core area of ecological protection,based on the control effects of geological condi-tions on the ecosystem with the support of ArcGIS spatial analysis function,the importance of ecologi-cal protection in the area is evaluated from the two aspects of ecological vulnerability and the impor-tance of ecosystem service functions by AHP.The results show that the extremely important areas of ecological protection in Datong are mainly distributed along the Daban Mountain and Niangniang Mountain to the northwest,accounting for 29.27%of the total area.The important areas are distribu-ted in the national public welfare forests,nature reserves,drinking water source reserves and other areas on both sides of the Baoku River,accounting for 44.97%of the total area.The general important areas are distributed on both sides of the Beichuan River,accounting for 25.76%of the total area.The evaluation of ecological protection importance based on the geological conditions can more accu-rately reflect the ecological status and functional characteristics of the area,which provides scientific basis for the ecological protection and construction of green ecological protection barriers.