Risk of sediment related disasters due to the abandoned expanding bamboo stands at the foot of slopes surrounding city area
Risk of sediment related disasters due to the abandoned expanding bamboo stands at the foot of slopes surrounding city area
复制标题
城市周边山坡脚下废弃的膨胀竹林造成泥沙灾害的风险
DOI：
10.3313/jls.41.4_323
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
Dura Durga Bahadur
中科院分区：
文献类型：
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作者：
H. Hiura;T. Arikawa;Dura Durga Bahadur
日本西南部地区废弃竹林的扩张是显著的。1998年9月在高知市，由于强降雨，在高知市周围的山坡上：发生了许多边坡失稳和泥石流。在近1/3的泥沙灾害发生点附近或附近都有竹林分布，竹林在泥沙灾害中起着重要作用，但关于竹林扩展与泥沙灾害关系的研究还很少，笔者认为，在不久的将来，竹和竹林是泥沙灾害中最严重的问题之一。竹坡一旦被砍伐用于种植或其他农业用途或在坡脚建造房屋，根垫系统具有良好的渗透性，通过根垫系统渗透的大量雨水将造成严重的侵蚀，诱发边坡失稳。作者在实验室对竹林土壤进行了调查，并进行了原位贯入试验，提出了三种竹材破坏模式。这些模型对于竹林废弃地的治理和竹林不稳定边坡的治理具有一定的参考价值。
The expansion of abandoned bamboo stand in the southern-western region of Japan is remarkable. In September 1998 in Kochi city, due to the heavy rainfall, on the slopes surrounding Kochi city: many slope failures and debris flow have occurred. At almost 1/3 site of disasters, bamboo stands were found very close to the site or on that point, and the bamboo stands seemed to have important role on the sediment related disasters.Researches on the relation between the expansion of bamboo stand and the sediment related disasters are very few, though authors have the conviction that, in the near future, the bamboo and bamboo stands will cause one of the severe problems in the sediment related disasters. Once the bamboo slope is cut for the cultivation or another agricultural usage or house building at the foot of the slope, having the root-mat system good permeability, the infiltrated abundant rainwater through root-mat system will cause severe erosion and induces the slope instability. Authors have investigated the soil of the bamboo stand in the laboratory and executed the penetration test in-situ and subsequently, proposed three failure models of bamboo. These models will be useful for the treatment of the abandoned bamboo stand and for the measures of the instable slope on which bamboo grows.