| Taking West Anshan Iron Mine for example，the BP artificial neural network model was used to evaluate the water quality of 12 monitoring points in the area. The established model took principal components such as total hardness, dissolved total solids, sulfate, chloride, iron and manganese, nitrate, and fluoride as evaluation factors. Comparing with the evaluation results by fuzzy comprehensive evaluation method and comprehensive quality evaluation method, results showed that the water quality in site No.8, 9, 10 and 11 were up to standard of class Ⅰ, in site No.1, 2, 3, 4, 6, 7 and 12, up to class Ⅱ, and site No.5, class Ⅲ, indicating the West Anshan Iron Mine had no impacts on the groundwater quality. The results evaluated by the established method were in accordance with the results by the two methods mentioned above. Therefore, objective and reasonable evaluation results can be made by the established method. |
