兼顾生态固滩与疏浚弃土生态化利用的生态航道建设技术

长江中下游航道治理中以软体排为主的护滩工程易造成滩面硬质化。为改善护滩工程区滩面生态环境,基于亲水植被的固土效应,结合新洲—九江河段航道整治二期工程,提出一种兼顾疏浚弃土利用与洲滩守护的生态航道建设技术。该技术利用疏浚弃土适当抬高洲滩滩面,并引入本土耐淹亲水植被,采用可降解、无污染的天然材料进行辅助固土防冲,确保先锋植被能够稳定发育至足够丰度,进而实现滩体稳定。

Ecological channel construction technology combining ecological beach consolidation and ecological utilization of dredged spoil

In the middle and lower reaches of the Yangtze River channel regulation,the beach protection engineering with soft mattress as the main part is easy to cause beach surface hardening.In order to improve the habitat conditions of beach consolidation area,we propose an ecological channel construction technology combining the utilization of dredged soil and the protection of the beach based on the soil consolidation effect of hydrophilic vegetation,which is used in the engineering design of the second stage of waterway regulation from Xinzhou to Jiujiang channel.This technology uses the dredged soil to lift the beach surface,introduces the local flood resistant and hydrophilic vegetation,applies the degradable and pollution-free natural materials to assist in soil consolidation and erosion control,so as to ensure that the pioneer vegetation can develop stably to sufficient abundance,and finally achieve the stability of the beach.