| 张亦飞.湖泊富营养化综合评价的距离测度模型[J].水利学报,2008,39(4): |
| 湖泊富营养化综合评价的距离测度模型 |
| Relative distance measure model for eutrophication comprehensive evaluation of lake |
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| DOI： |
| 中文关键词: 富营养化 综合评价 区间数 对数变换 Monte Carle模拟 |
| 英文关键词: eutrophication comprehensive evaluation interval number logarithmic transformation Monte Carlo simulation |
| 基金项目: |
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| 摘要点击次数: 3104 |
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| 中文摘要: |
| 湖泊富营养化评价标准中的分级指标为区间数，区间的下界点值和上界点值差异很大，近似呈指数变化。基于该认识，提出了一个湖泊富营养化综合评价的新模型——相对距离测度模型(RDMM)。首先，对评价标准分级指标界值及待评湖泊水质指标值进行对数变换，以降低评价系统的非线性化程度；其次，定义评价标准与待评湖泊单一指标之间的相对距离测度，利用兼顾功能性与协调性的评价函数及Monte Carle模拟计算综合相对距离测度。综合距离测度最小值对应的类别即为待评湖泊的富营养化程度。文中给出了由5个湖泊组成的富营养化综合评价实例。 |
| 英文摘要: |
| A new method namely Relative Distance Measure Model is proposed for eutrophication comprehensive evaluation of lake. Firstly, the thresholds of standards for classification of eutrophication and the values of water quality indicators are transformed into logarithmic value to reduce the nonlinearity of the evaluation system. Then, the distance of each indicator apart from the corresponding control standard is defined as the quantity to be used for evaluation. On this basis, the evaluation function, which taking both functionality and coordination into account, and the Monte Carlo simulation method are used to calculate the comprehensive relative distance measure. The eutrophication grade of the lake can be determined by the minimum distance apart from the standard of corresponding grade. The application to five lakes in China shows that the proposed method is feasible. |
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