The Jianhe River in Wudang Mountain, Hubei, is one of the Danjiangkou reservoir water source. Combining with the hydrological monitoring data and water function zoning about Jianhe River in Wudang Mountain and using the related the water environmental capacity calculation model, estimates the theory water environmental capacity of Jianhe River in Wudang Mountain, and then calculate its effective water environmental capacity. And the results show that: the theory water environmental capacity of

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... ianhe River in Wudang Mountain is: COD 340.39 t/a, NH 3 -N 66.62 t/a, TP 12.13 t/a, TN 105.30 t/a, the effective water environmental capacity is: COD 221.37 t/a, NH 3 -N 43.3 t/a, TP 7.89 t/a, TN 68.45 t/a.