Identification and Assessment of Ecological Sensitivity in Chishui River Basin Based on GIS

¹ China Institute of Water Resources and Hydropower Research, 100038 Beijing, China
² China Three Gorges Construction Management Co. Ltd, 100038 Beijing, China
³ China Three Gorges Corporation, 100038, Beijing, China

^a Corresponding author: lihaiy@iwhr.com and
^b Corresponding author: lujia@iwhr.com

Abstract

In this paper, GIS and RS spatial analysis techniques were used to establish a system for identifying sensitive targets of terrestrial ecosystems in Chishui River Basin, and to identify protection targets of terrestrial ecosystems in different regions. The result shows that the assessment of habitat sensitivity in Chishui River Basin was dominated by non-sensitive areas and highly sensitive areas, which highly sensitive areas account for 60.43% of the basin area, mostly concentrated in the mountainous areas at the junction of Chishui City, Xishui County and Gulin County; non-sensitive areas account for 39.13% and are mosaically distributed with highly sensitive areas; mildly sensitive areas, moderately sensitive areas and extremely sensitive areas account for a total of about 0.5% of the basin area and are more scattered throughout the basin. The distribution is scattered. The moderately sensitive areas in the Chishui River Basin are more than 60.7% of the basin area, indicating that the habitats in the Chishui River Basin are generally sensitive and the ecologically sensitive targets are mainly wooded areas, which need to be protected.