【知识重点】一、水土流失的治理(以黄土高原为例)1.地理状态(1)特征:①地势由西北向东南倾斜;②千沟万壑,支离破碎。(2)脆弱的生态系统:①抵御自然灾害的能力较低(地理位置特殊——多处过渡地带、人类的不合理开发);②环境遭到破坏后恢复困难。(3)尖锐的人地矛盾:恶性循环。2. [Knowledge] First, the management of soil erosion (taking the Loess Plateau as an example) 1. Geographical status (1) Features: 1 The terrain is tilted from the northwest to the southeast; 2 thousand gully, fragmented. (2) Fragile ecosystems: 1 The ability to resist natural disasters is relatively low (special geographic location - multiple transitional areas, unreasonable human development); 2 The recovery of the environment is difficult. (3) Sharp conflicts between man and land: a vicious cycle. 2.