Ecological sensitivity of Jingnanxia-Heishanxia reach of Yellow River

Aiming at the ecological problems such as soil erosion, desertification, and salinization in the Jingnanxia-Heishanxia reach of Yellow River, the single-factorial ecological problem' s sensitivity and the comprehensive ecological sensitivity of the reach were analyzed by CIS spatial analysis, grid computing and superposition, and RS image feature extraction. The results showed that the regions with medium-and high ecological sensitivities almost covered the whole study area, including the Wufo Town of Jingtai County, the Beiwan Town, Wulan Town, Milan Town, Dongwan Town, and Santan Town of Jingyuan County, and the area between Doucheng and Hongliutan of Pingchuan District. The high, medium, and low sensitive areas should be accordingly programmed as forbidden, medium, and deep constructing areas. During the development process of regional hydropower, effective measures should be adopted to protect the ecological environment to achieve the sustainable development of the drainage area.