鄂西三峡库区森林变化对河川径流泥沙的影响

Influence on River Flow and Sediment by Changes of Forest in the Three Gorges Reservoir Area of West Hubei Province

该文针对鄂西三峡库区森林变化及河川径流泥沙的特点，采用流域自身对比法，以森林覆盖率和活立木总蓄积量为主要森林指标，分析研究了森林变化与年径流、枯水期径流、洪枯比及年输沙模数的关系，并在鄂西三峡库区内进行了验证．结果表明：年径流深与森林覆盖率呈正或负相关；森林覆盖率与洪枯比及年输沙模数呈负相关；活立木蓄量与枯水期径流深呈正相关．

The effects of forest changes on river flow,discharge of dry season and sediment load modulus are analysed in the paper on the basis of their characteristics and the method of watershed comparison with itself in the Three Gorges Reservoir Area of West Hubei.The percentage of forest cover and growing stock are set as main forest standards.The results show that the percentage of forest cover and the river flow were in positive or negative relation;growing stock and discharge of dry season were in positive relation;percentage of forest cover and sediment load modulus in negative relation.