河道生物护堤固岸技术的实践与探讨

以汾河下游运城段为例 ,提出了平原冲积性复式河道生物护堤和生物固岸护弯新模式。对防洪土堤 ,采用优化栽植乔灌木林带建设的方法 ,削能防冲 ,固坡护堤 ;对弯道险段 ,在岸坡及河底 ,插植矮化的紫穗槐、绵柳等灌木林带 ,控制河势 ,稳定主槽 ,防止其畸形发展。并提出了护堤林带可持续发展的管理措施。

Development Strategy of Soil and Water Conservation Ecological Environment Construction in Southern Gansu Province

The new model of ecological dyke protection and bank solidification in curve sites of alluvial compound river channel in plain is put forward in the paper by taking Yuncheng reaches in the lower Fen River as example. As to earth dyke for flood prevention, it is recommended to apply optimum cultivation of arbores and shrubs to have belt that can consume energy, prevent erosion, protect dyke and consolidate slope; and the shrub belt, such as Shrubby Falseindigo,Woolly Willow and so on, should be adopted to transplant in bank slope or river bed in dangerous curve sites to control river regime, stabilize main channel and protect abnormal development. Also, the management ways for sustainable development of the dyke protection forest belt are put forward.