根据土壤蓄水能力探讨若尔盖重要生态服务功能区的水源涵养功能

Discussion on the Water Conservation Function of Important Ecosystem Services Area in Zoige according to Soil Water Storage Capacity

若尔盖水源涵养重要生态服务功能区是全国50个重要生态服务功能区域之一,具有极重要的水源涵养生态服务功能。该区涵盖四川省境内的黄河流域区,面积约1.6×104km2,区内分布有涵水能力极强的沼泽土和泥炭土,对调节黄河径流时空分布具有非常重要的作用。本文利用地理信息系统技术,用土壤饱和蓄水量指标评价了本区的水源涵养生态服务功能,表明若尔盖水源涵养重要生态服务功能区土壤理论蓄水量可达8.31×108t,对维系黄河流域的水资源安全保障意义十分重大。

Zoige water conservation ecosystem services area is one of the top 50 ones in our country.It has very important function of water conservation ecosystem services.This region is about 16,000 km2 and contains part of Yellow River basin in Sichuan Province.Marshy soil and peat soil with great capacity of water storage distribute in this region,which plays a very important role to regulate the temporal and spatial distribution of Yellow River runoff.In this paper,adopting the GIS technology,saturated soil water storage capacity index was used to evaluate the water conservation ecosystem services function.The result showed that the theoretical soil water storage capacity of Zoige water conservation ecosystem services area reached 8.31×108t.It was of great significance to maintain the water resources safety of Yellow River basin.