摘要
Based on the neural network toolbox of MATLAB, the authors designed an evaluation model on the groundwater quality, taking the groundwater sample in Nantong City as an example. The evaluation results reflected the reality of the groundwater situation of the studied city, showed the BP neural network was of strong learning and self-adaptive abilities, capable of avoiding the artificial factor influence in the determination of weight and threshold values, increasing the objectivity, fairness and precision of evaluation results.