| dc.description.abstract | Logging, tree planting, and then logging is Taiwan’’s most important policy about mountains for centuries. Geological weakness, river siltation, and high turbidity are Geological features of Taiwan. The volume of river silt in Taiwan is the first in the world，Taiwan is located in the convergence of the Philippine Plate and the Eurasian plate，because the Geological Youth，Plate’’s Collision and Squeezing, and Rock Crushing, there are faults everywhere；Soft, fragile homes are its own terrible results under the blind disastrous development in the mountains, isn’t it？
Reservoirs, forests, land and people are the focus of this study. This research starts from the concern of Tao-Yuan water shortage from 2004 to 2005，nearly one million residents face the water crisis，the researcher extract experience from the past，take the development of the upper Ta-hang River Basin as an example, explore the causal relationship between human development and the mountains, focus on reviewing key water conservancy facilities in northern Taiwan, and the development history of Shih-Men Dam and the northern cross-island highway，and organize the forest policy of the national government during the post-war period, study on the development patterns of Mountain land usage, and how they affect the environment , residents , economy and life； especially study on the corresponding results between people and state power at different times，review and reflect on through the vertical axis of time to implement the far-away caring for the environment, land, and people.
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