基于加权叠加模型的高原湖泊流域重要生态用地识别——以星云湖流域为例

生态用地在维持区域生态平衡和保障区域生态安全具有重要意义。以云南星云湖流域为研究区,运用层次分析法和GIS技术,从水土保持、地质灾害规避与防护、生物多样性保护和水资源安全4个方面,构建了流域重要生态用地识别指标及其识别方法,并识别出流域重要生态用地空间分布。结果表明:(1)加权叠加模型更适用于高原湖泊流域重要生态用地识别;(2)根据生态用地重要性分为核心型、辅助型、过渡型和非重要生态用地,面积分别为75.98 km~2、105.05 km~2、89.47 km~2和65.11 km~2,分别占流域生态用地总面积的22.64%、31.30%、26.66%和19.40%。识别结果能较好地反映重要生态用地维护流域的生态安全。以星云湖流域作为高原湖泊流域的典型,为高原湖泊生态保护提供科学方向,以期协调流域经济发展与生态保护的矛盾,促进可持续发展。

WSM BASED IDENTIFICATION OF IMPORTANT ECOLOGICAL LAND USE IN PLATEAU LAKE BASIN——A CASE STUDY OF XINGYUN LAKE BASIN

Ecological land plays an important role in maintaining regional ecological balance and ensuring regional ecological security.Taking Xingyun Lake Basin in Yunnan Province as the study area and using AHP and GIS technology,from the soil and water conservation,geological disaster avoidance and protection,biodiversity protection and water resources security,this paper constructs the important ecological land identification index and its identification method,and identifies the spatial distribution of important ecological land Results show that (1)WSM is more suitable for identifying important ecological land in Plateau Lake Basin;(2) The area of important ecological land belonging to core type,auxiliary type,transitional type and non important ecological land was 75.98 km2,105.05 km2,89.47 km2 and 65.11 km2,respectively,and accounting for 22.64％,31.30％,26.66％ and 19.40％ of the total ecological land.The results can reflect the important ecological land to maintain ecological security of the basin.Xingyun Lake Basin as a typical Plateau Lake Basin,provides scientific direction for the ecological protection of the plateau lake,achieves a win-win between economic development and ecological protection,and promotes the sustainable development of the basin.