| Summary: | 碩士 === 國立臺灣大學 === 環境工程學研究所 === 87 === Available sites that meet geological requirements for building reservoirs are being limited in Taiwan. Due to citizen''s growing interest on environmental protection and ecological preservation, to locate a site for reservoir building becomes a more difficult task. Therefore, we will face the shortage of water resource if we do not carefully maintain the proper functions of the existing reservoir watershed.
In this study, AGNPS model was used to estimate the sedimentation rate under different intensity of agricultural land use in Feitsui reservoir watershed. Gould''s Method is applied to get the relationship between reservoir capacity and draft. The benefits of draft and electric power generation under the present situation of agricultural land use and under alternative situations were compared. Finally, combining the benefits of good water quality, landscape, recreation, ecology and agricultural and so on, and adding the cost of desilting and afforestation, we could identify the best management alternative in Feitsui reservoir watershed.
The draft and electric power benefit have already taken certain percentage of the agricultural benefit. When we take the other benefits into account, we conclude that converting the present agricultural land use to forest land use is the best choice in Feitsui reservoir watershed.
Also, compensation the loss of farmers right to farm in Feitsui reservoir watershed will be appropriate and cost-effective.
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