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The Manning Equation is widely adopted to estimate open channel flows, and selecting retardance coefficient is always one of the most difficult tasks for estimating velocity and discharge. In cases of estimating accurate retardance coefficient values of vegetated channels, countless trials and errors are to be made before reaching conclusive results due to conditions created by various aquatic plants...
In this paper, a brief description of the status of ecological engineering methods in Taiwan is given. A case example reviewing recent efforts to save the endangered Formosan landlocked salmon and results of fish population monitoring are described.
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