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中文摘要：
目的探讨汉江安康段排污口近区污染扩散规律。方法采用二维水质模型模拟了汉江上游安康城区段的排污口污染扩散情况，计算了污染带的范围和距离。结果该段主要有7个排污口，断面水质基本都能满足Ⅲ水质功能类别。得到7个排污口COD污染带总面积为0．085km^2，占该河段流域面积的2．9％。结论运用模型对水质进行模拟必须以大量的实测数据为基础，后续工作应以实测为依据，及时修正其中参数，使模型能更好地进行模拟计算。
英文摘要：
Aim To discuss the dispersion law about the near ouffall pollution in Han River （Ankang） area. Methods Two-dimensional water quality models were used to simulate the upper reaches of Hanjiang River ouffall spread of pollution. The pollution of the scope and distance has been calculated. Results The paragraph has seven main ouffalls. Section Ⅲ water quality can meet the water quality of the basic functional group. The COD poUution of seven ouffalls with a total area of 0. 085 km^2 have been received. The river basin area accounted for 2. 9%. Conclusion The model to simulate the water quality must be based on many measured data for the foundation. The next job should be measured based on a timely amendment to one of the parameters, so that the model can be better simulated.
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