摘要
湿地是自然界生物多样性较为丰富的生态系统,具有很大的生态功能及生态学价值,湿地水质评价需要综合考虑各指标的属性。介绍了基于改进熵权的灰色关联模型在湿地水质综合评价中的应用。以黑龙江省扎龙国家级自然保护区湿地调查采样数据为例,通过构建灰色关联决策矩阵,同时采用改进熵值法确定权重,再由计算各样本的灰色关联度来确定其所属级别,进而对保护区水质采样点的水质进行综合评价。基于改进熵权的灰色关联度模型,为湿地生态系统水质综合评价提供了新的思路。
This paper is focused on the study how to apply gray relevancy model based on ameliorated entropy to comprehensive evaluation of wetland environmental quality. First of all, it has introduced the concept of the gray relevancy model, including listing the analysis sequences, the ways to construct the decision-making matrix of gray relevancy, calculating the maximal and minimal differences, calculating the relevance coefficients, etc. On top of that, we have put forward the drawbacks of the entropy-method and thereby illustrated the improved methods of ours for calculating the related coefficients. Then, we have made necessary explanations to the degree of relevancy and the meanings of its calculation. And, finally, with the survey data of Zhalong national natural reserve, Heilongjiang, as a case study, we have provided a comprehensive evaluation of the water quality in the reserve based on the construction of the decision-making matrix of gray relevancy by using the improved entropy-method for calculating the weight coefficient and calculating the gray relevancy of each sample to confirm its scale. Compared with the results of former investigation statistics and other related data, we have arrived at the conclusion that the ameliorated method suggested by us proves reasonable. Thus it can be said that the gray relevancy model based on ameliorated entropy can be expected to provide the workers and departments concerned with a new available means of comprehensive evaluation of wetland water quality. Moreover, since the wetland is one of the natural ecosystems and enjoys abundant biodiversity, it is of great importance for its eco-environmental protection functions as well as ecological values on the whole. However, it is necessary to come to mind that while evaluating water quality comprehensively, each target should betaken independently rather than amalgamating each other improperly. If so, it would be unavoidable to lead to missing some significant information, even leading to some kind incorrect results if evalu
出处
《安全与环境学报》
CAS
CSCD
2008年第6期80-83,共4页
Journal of Safety and Environment
基金
中国气象局成都高原气象开放实验室基金项目(LPM2007004)
关键词
水质综合评价
自然保护区湿地
灰色关联度
熵值法
comprehensive evaluation of water quality
nature reserve wetlands
grey relevancy
entropy
