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[1]LI Zai-ming.The Estimation of Minimum Flow in Streams of Taiwan——A Case Study of Eastern Taiwan[J].Research of Soil and Water Conservation,2001,8(04):146-150.

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The Estimation of Minimum Flow in Streams of Taiwan——A Case Study of Eastern Taiwan

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 8 Number of periods: 2001年04期 Page number: 146-150 Column: Public date: 1900-01-01

Title:: The Estimation of Minimum Flow in Streams of Taiwan——A Case Study of Eastern Taiwan

Author(s):: LI Zai-ming; Department of Natural Resources, Chinese Culture University, Taiwan, China

Keywords:: Taiwan; streams; minimum flow

CLC:: P332.3

DOI:: -

Abstract:: The flow assessment methods have been extensively discussed but have no real resolution. Minimum flow in rivers and steams provides a certain level of protection for the aquatic ecosystem. Therefore, the estimation of minimum flows becomes one of the major considerations in dam construction. Three major categories of quantitative instream flow assessment methods, including historic flow, hydraulic geometry, and habitat have been examined last decade. Historic flow and hydraulic geometry methods are used in this study to estimate the minimum flow in the upstream of Hoping Stream. The historic flow methods rely on the recorded or estimated flow of the river. Tennant method, flow duration curve and the watershed area estimation are the most widely known methods. The estimations of the minimum flows are 1.46 cms in the flooding season and 0.61 cms in the dry season. The results based on the daily flow duration curve are 3.12 cms to 1.87 cms while the exceeding probability from 96%to 100%. According to the watershed areas versus flow experience value estimation method, the estimations of the minimum flows are 0.95 cms and 1.06 cms by using different parameters. Hydraulic geometry methods based on various parameters such as width, depth, velocity, and wetted perimeter. The estimation of this study is from 3 to 2 cms in different parameters. Habitat methods are not examined in this study due to the complicated procedure to establish the habitat suitable curves.

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Last Update: 1900-01-01