密云水库集水区河岸生物工程措施初探

密云水库作为北京城区的重要饮用水源地，水库集水区流域多山，夏季降水高度集中，水土流失面积大，严重的水土流失威胁着水库集水区生态环境，如何治理集水区内的水土流失，改善集水区生态环境非常重要.生物工程以其具有生物生态学属性这一最突出的特点，而不同于传统的土木工程.它把植物及其对坡面、河岸不稳定的影响与侵蚀过程联系起来，在防治侵蚀和保护环境中具有快速的工程效应和持久的防护作用双重功能.从河岸带的功能出发，阐述了河岸生物工程措施的复合功能，介绍了河岸生物工程措施植物的选取原则，以此为基础，详细介绍了集水区河岸生物工程措施的类型及设计模式，以期为密云水库集水区河岸整治提供理论基础.

Soil Bioengineering of Riparian in Miyun Reservoir Watershed

Miyun Reservoir plays an important role in supplying water for industrial and household use in Beijing.Miyun Reservoir watershed is in mountainous region,where the precipitation is concentrated in summer.However,the serious soil erosion threatens ecological environment of Miyun Reservoir watershed,so how to control soil erosion and improve ecological environment becomes urgent.Soil bioengineering relates plant and its effect on slope instability with erosion process and has the double effect of instant engineering and sustainable protection in erosion control and environment protection.With its biological characteristics and its dynamic nature,soil bioengineering differs from traditional civil engineering.The function of riparian zone is discussed,the compound function of soil bioengineering is stated and the principle of plant species selection in soil bioengineering of riparian is presented.On the basis of these principles,the types and design patterns are provided in detail as the theoretical foundation for riparian restoration in Miyun Reservoir watershed.