海水营养状态的灰色关联评价模型及应用

基于计算海水营养状态评价指标的参考序列(u0)和其比较序列(ui)之间的关联度这一思路,建立了一种新的海水营养状态的灰色关联评价模型,并应用这个模型对2001年8月东海区10个主要河口、海湾的水体进行了营养状态评价,结果表明:应用灰色关联海水营养状态评价模型所进行的海水营养状态等级的评价和划分,与实际该区水体的营养状态有很好的吻合。同时,该模型在进行营养状态评价时,能避免人为的主观臆断,并能适应营养状态受PO4-P限制的中国主要近岸河口、海湾等特殊海域的要求,因而可以作为一种科学、实用的海水营养程度评价模型,推广应用于水质评价等研究领域和实际评价中。

The application and model of grey association for evaluation of sea water nutrition grade

The degree of grey association is a measurement of relationship among things or factors.In this paper,based on calculating degree of association between reference sequence(uo) and the comparison sequence(ui) of evaluation index of sea water nutrition grade,the model of grey association for evaluation of sea water nutrition grade was established and was applied to nutrition grade evaluation in main estuaries and bays of the East China Sea in Aug.,2001.By using of this model,the nutrition grade belonging of the main estuary and bay in the East China Sea and the sequence of nutrition grade of them were made out.The results showed that using the model of grey association for evaluation of sea water nutrition grade not only could avoid the arbitrariness of artificial judgement,but also could accord with the important characteristic of phosphorus-limited in main estuaries and bays of China,the results accord with the facts well.The model of grey association for evaluation of sea water nutrition grade may be a scientific and practical way to evaluate nutrition grade of sea water.