摘要
在我国西南山区下切河流——吊嘎河上利用人工阶梯-深潭进行河流治理的野外试验。吊嘎河河床严重侵蚀下切,由此引发塌岸、滑坡甚至泥石流灾害,河流生态环境变化剧烈,水生生态受到抑制。在吊嘎河中上游选取长约150m河段,模仿自然阶梯-深潭的地貌及结构特点,布置人工阶梯-深潭,并对河流微地貌、水生栖息地环境及生态进行了5个月的观测。人工阶梯-深潭布置后,试验段河床持续冲刷下切的趋势得到有效控制;维持了较为稳定的水生栖息地环境,同时水生栖息地多样性增加。采用大型底栖无脊椎动物评价河流生态显示,吊嘎河的水生生态也得到明显改善。吊嘎河野外试验初步表明,人工阶梯-深潭系统是山区下切河流综合治理中的一个有效方法。
The field experiment by using artificial step-pool is carried out to harness the Diaoga river, which is a seriously incised mountain stream in Southwest China, and therefore induces the bank failure, landslides and even debris flow disasters, the stream habitat always varies dramatically and thus depresses the ecologic environment of the river. Fifteen artificial steps are designed to mimic the natural step-pools and constructed on a stretch of about 150m in the mid-up stream of the Diaoga river. The stream microtopography, aquatic habitats and stream ecologic environment are monitored for 5 months. After the artificial step-pools constructed, the channel incision is effectively controlled which helps to maintain a relatively stable and diversified stream habitats. The benthic macro-invertebrates are used as the indicator species to evaluate the stream ecologic environment;the results show that the ecologic environment in the experimental reach of Diaoga river is improved. The field experiment indicates that the artificial step-pool system is an effective way for harnessing incised mountain stream.
出处
《水力发电学报》
EI
CSCD
北大核心
2008年第1期85-89,共5页
Journal of Hydroelectric Engineering
基金
国家重点基础研究发展计划(973计划)(2003CB415206)
中科院山地灾害与地表过程重点实验室高访学者研究基金(2006001)
关键词
河流泥沙工程学
下切河流治理
人工阶梯-深潭
河流微地貌
水生生态
大型底栖无脊椎动物
river sedimentation engineering
incised stream harnessing
artificial step-pool
stream microtopograhpy
aquatic ecologic environment
benthic macro-invertebrate
