[1]CHEN Chaur-tzuhn,CHEN Mei-Kuang.Impact and Adaptation Strategy of Extreme Rainfall on Forest Watershed[J].Research of Soil and Water Conservation,2012,19(01):262-265.
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Impact and Adaptation Strategy of Extreme Rainfall on Forest Watershed
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
19
Number of periods:
2012 01
Page number:
262-265
Column:
Public date:
2012-02-20
- Title:
- Impact and Adaptation Strategy of Extreme Rainfall on Forest Watershed
- Keywords:
- forest watershed; forest management; extreme rainfall
- CLC:
- S715
- DOI:
- -
- Abstract:
- In recent years, the global warming had increased extreme climate such as heavy rainfall events that had caused sediment disasters and destroyed the landscape structure and ecosystem function. Therefore, how to make operations or strategies for forest management to reduce the impacts of extreme weather events will be an important issue in the future. This research selected the Kao-Ping River watershed as a study site. The rainfall data of 17 years in Kao-Ping River watershed were collected to analyze the pattern of extreme rainfall. We used the remote sensing data to retrieval the landslides distribution caused by different rainfall of Toraji and Morakot typhoon. In addition, the pattern of rainfall would be used to examine the impact and relationship between the landslides and forestland use. The study results show that the frequency of extreme events, rainfall had been increased in Kao-Ping River Basin after the year 2005. The maximum 24 hours rainfall along with typhoon Morakot are 1.92 times than that of Toraji, and the landslides ratio of the Natural Reserve Area during the typhoon Toraji were collapsed from 0.64% to 0.86%, and the National Protective Area were collapsed from 0.95% to 1.15%. The proportion of new landslide of typhoon Morakot was 11.81 times with Typhoon Toraji in Reserve and Protect area due to the steep terrain and heavy rain. Typhoon Morakot also exerted a serious impact on landslides in timber management area and recreation area. The vulnerability of forestland was increased and decreased the induced threshold of landslide. The vegetation cover has been unable to resist the impact of extreme rainfall. The forest division and land use management will have to rethink in future.
- References:
-
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Last Update:
1900-01-01