The evaluation method of water eutrophication based on cloud model
基于云模型的水体富营养化程度评价方法

The evaluation of water eutrophication is important in the field of ecological environmental protection. According to the characteristics of the inevitable fuzziness and randomness in the evaluation of water eutrophication, this paper introduces the cloud model method to evaluate the eutrophication of China's 14 typical lakes and reservoirs. The comprehensive cloud of each factor on each level has been generated based on the assessment index and assessment factors. According to the measured data for lakes and reservoirs, the degree of certainty for each evaluation material can be obtained. The eutrophication level of lakes and reservoirs is then determined by the maximum degree of certainty. Comparing the evaluation results from this developed cloud model method with the actual water quality conditions and the results from some widely used methods, such as nutritional status index method, simple scoring formula method and fuzzy comprehensive assessment method, it can be concluded that the cloud model method is reliable, simple and straightforward, thus its feasibility and effectiveness is verified.