三江平原地下水脆弱性评价的投影寻踪模型

PPC model based on RAGA in evaluating groundwater vulnerability of Sanjiang Plain

地下水脆弱性评价的关键是指标体系的建立。在传统的DRASTIC模型的基础上,结合三江平原实际情况,建立三江平原地下水脆弱性评价指标体系。在以往的地下水脆弱性评价中,常采用层次分析技术、模糊数学理论等,其共同的弊端是人为确定各评价因子的分级标准以及人工为因子赋权,带有一定程度的主观性。为了克服这个弊端,结合三江平原实际情况,首次将基于实数编码加速遗传算法的投影寻踪模型应用于该地区的地下水脆弱性评价,取得了令人满意的效果,为地下水脆弱性评价提供了新思路和新方法。

The key of evaluation in groundwater vulnerability is establishing the index system. According with the conditions of the area, the index system of evaluation in groundwater vulnerability of Sanjiang Plain was established based on the traditional DRASTIC model. In past groundwater vulnerability evaluation, arrangement analysis technique and fuzzy mathematics theory, etc. were frequently adopted. These methods had common abuse that artificial ensure the grade criterion of evaluation factors and artificial endow weight for factors, so as to, it brought certain subjectivity. For the sake of overcome the abuse, the article firstly applied the PPC model based on RAGA to evaluation in groundwater vulnerability of Sanjiang Plain combining with fact complexion of the area. Finally, the satisfying effect was acquired. It offers new way and method for groundwater vulnerability evaluation.