长江中游生态护岸工程的岸坡植被分布特征研究

近年来长江中游河道治理和航道整治工程中采用大量的生态护岸技术,且取得较大生态效益,但是经过现场调查发现在生态护岸岸坡存在一条明显的青黄线.针对此问题,以长江中游航道整治工程新厂护岸工程和桃花洲护岸工程为例,以青黄线为界将岸坡分为青绿带和青黄带,分析岸坡上青绿带和青黄带狗牙根分布特征及其形成的原因,并通过统计水位累计频率...

Vegetation distribution characteristic on bank slope in ecological bank protection project of the middle Yangtze River

A large number of ecological projects are used in the river and waterway regulation for the middle Yangtze River in recent years,and great ecological benefits are obtained.However,there is an obvious cyan-yellow line on the ecological bank slope according to field investigation.Aiming at this problem,we take Xinchang bank protection project and Taohuazhou bank protection project in the middle Yangtze River as examples,divide the bank slope into the cyan-green zone and cyan-yellow zone by the cyan-yellow line,analyze the distribution characteristics and the formation mechanics of bermudagrass,and determine the design control elevation of the cross-section by the cumulative frequency curve of water level.The results show that the elevation of the cyan-yellow line is closely related to the controlling of the Three Gorges reservoir.The elevations corresponding to the cumulative frequency of 45%and 80%are the design control elevations of the ecological bank protection section.