据有关部门测算：长江上游每年通过三峡输入中下游的泥沙超过１０亿ｔ。为改变这一严峻现实，达到治理水土流失的目的，以保持三峡水库有效库容，一项称为“生物篱”的保土还林技术目前正在三峡库区实施。“生物篱”是完全采用生物措施治理水土流失的一种模式。科研人员在三峡 According to the estimates of relevant departments, the sediment transported into the middle and lower reaches of the upper reaches of the Yangtze River each year exceeds 1 billion tons. In order to change this harsh reality and achieve the goal of soil and water loss control, in order to maintain the effective reservoir capacity of the Three Gorges Reservoir, a technology called “biological hedgerows” is being implemented in the Three Gorges Reservoir Area. “Bio-fence” is a model that completely uses biological measures to control soil and water loss. Researchers in the Three Gorges