The remediation efficience of sediment disaster in Lao-Fotorrent

• Main Authors: Chou,Chin-Yuan, 周欽源
• Other Authors: Hsu, Chung-Li
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/27984985064657148908

碩士 === 國立屏東科技大學 === 水土保持系所 === 103 === In this era of global climate anomaly, there is many earth and sand disaster occurs at landslide due to the raining . Last several years Nanmado typhoon (2011) has a cumulative rainfall up to 950mm in 3 days at Manchou Township, Pingtung County. The typhoon has caused severe landslides which destroy houses, agricultural land as well as crops and revetment near the upstream of Lao-Fo torrent (about 13 hectares). There is about 200000 m3 (in estimate) of earth and sand was still remaining on the upstream. Soil and Water Conservation Bureau has marked the area as Pingtung County DF070 landslide potential streams. Moreover, Forest Bureau and Pingtung County Government has carried out a five-years-plan and set up monitoring system for the further analysis. "On the whole catchment and Planning Report writing Reference Manual" issued by the Soil and Water Conservation Bureau (2008) was used in this study to provide the calculation of remediation rate as a reference of analyze the benefit of the project to avoid over-design. Apart from that, the result of remediation was verified through the FLO-2D numerical method based on simulation of rainfall 60 min and 90 min of the submerged area when the structure has been completed. The results showed that the farthest retreat range of accumulation area is about 150m and 120m after the preservation project is done. In conclusion, it can’t be denied that the project can ensure the safety of lives and property of residents in the area.