虽然我国南方红壤、东北黑土地带也存在着较为严重的水土流失现象,但水土流失最为严重、危害最大的地区当属黄土高原。黄土高原是典型的半干旱地区,造成水土流失的一些重要因素是:暴雨,丘陵地形,疏松土体,稀疏植被。而严重的水土流失和频繁的干旱同时发生、脆弱的生态环境和低下的生产力互为因果更是其重要特征。过去, Although red soil in southern China and black soil in northeastern China have serious soil erosion, the area with the most serious soil erosion is the loess plateau. The Loess Plateau is a typical semi-arid area. Some important factors causing soil erosion are heavy rain, hilly terrain, loose soil and sparse vegetation. Severe soil erosion and frequent droughts occur simultaneously. The combination of a fragile ecological environment and low productivity is an important feature of each other. past,