National policy of watershed management and flood mitigation after the 921 Chi-Chi earthquake in Taiwan |
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| Authors: | Yong-Jun Lin Yuan-Hsiou Chang Yih-Chi Tan Hong-Yuan Lee Yu-Jia Chiu |
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| Institution: | (1) Department of Civil Engineering and Engineering Mechanics, Columbia University, New York, NY, USA;(2) Department of Landscape and Architecture, Mingdao University, Changhua, Taiwan;(3) Department of Bioenvironmental Systems Engineering, Center for Weather Climate and Diaster Research, Hydrotech Research Institute, National Taiwan University, Taipei, 106, Taiwan;(4) Department of Civil Engineering, Hydrotech Research Institute, Center for Weather Climate and Disaster Research Center, National Taiwan University, Taipei, Taiwan;(5) Center for Weather Climate and Disaster Research Center, National Taiwan University, Taipei, Taiwan; |
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| Abstract: | Registering a 7.3 magnitude on the Richter scale, the 921 Chi-Chi Earthquake that struck central Taiwan on September 21, 1999
left the island nation with fragile soils, frequent floods, and debris flow, further weakening homeland resources. Taiwan’s
dense population had forced its residents to use mountain hills for agriculture and development. The 92-Flood in 2004, which
incurred vast monetary losses and human casualties, caused the government to rethink its strategy for land use. In order to
use land in a more efficient and in an eco-friendly manner, the Council for Economic Planning and Development, Executive Yuan
of the Taiwanese government proposed the “Land Recovery Strategy and Action Plan” in 2006. Its core concept was aimed at “respecting,
and adapting to, nature.” To achieve this goal, a hillside watershed management and flood mitigation policy was proposed.
Factors of safety, economy, and ecology were included in the policy. Both strategies and practical measures to be implemented
were organized in a chart for better understanding and for reference by other countries with similar conditions. |
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