摘要
针对引起太湖富营养化的主要因素,以实测数据为基础,应用定性与定量、客观与主观相结合的模糊数学改进层次分析法(IAHP)确定权重,同时求出各水质级别的模糊隶属函数并计算相应的隶属度,最后应用模糊综合评判对太湖西段13条入湖河流断面的水质进行评价。结果表明,其中8条属于Ⅴ类水体,从隶属度看其中5条污染最为严重。本研究为太湖入湖河流的治理方案、投资决策等的制定提供科学依据。
The present paper aims to introduce the authors＇ investigation and research of the water quality of 13 rivers into the lake lying in west area of the Taihu Lake catchments. It has given a detailed description of the water quality of the rivers by means of the Fuzzy membership function. As is known, fuzzy membership function is propitious to describe the fuzzy features of water quality. Therefore, considering the main factors that may affect the Taihu Lake water quality, the paper has chosen five parameters that can be used to appraise the quality, such as dissolved oxygen （DO）, permanganate demand index （CODMn）, ammonium nitrogen （NH3-N）, total nitrogen （TN） and the total phosphorus （TP） as the appraisal factors. In doing so, it is of great significance to assign the weight parameters in the primary water quality assessment for the rationality of the results. lmproved Analytic Hierarchy Process （IAHP） that has combined qualitative with quantitative, objective with subjective was put forward in the paper for weight value calculation on the basis of the original testing data, better solution to the problem of weight value affected by man-made factors, and better reflecting of fuzzibility between the levels of water quality. And finally, fuzzy membership function has been established with the corresponding membership well calculated. Fuzzy comprehensive evaluation method can thus be used to appraise the water quality of 13 rivers into the lake lying in western area of the Taihu Lake catchments. Results of the investigation indicate that 8 rivers of the 13 rivers were belong to V grade, and the 5 rivers in the same V grade are polluted seriously according to the membership of comprehensive appraise. The evaluation results have offered scientific basis for evaluating the renovating projects and investment of inflow river in this region.
出处
《安全与环境学报》
CAS
CSCD
2006年第1期87-91,共5页
Journal of Safety and Environment
基金
国家"十五"重大科技专项"河网区面源污染控制成套技术"(2002AA601012)
江苏省环保厅重点资助项目"太湖主要入湖河流水污染控制规划研究"(苏环科200221)
关键词
环境水利与评价
模糊综合评判
改进层次分析法
权重
水质评价
太湖
environmental water conservancy and evaluation
fuzzy comprehensive evaluation
improved AHP
weight value
water quality assessment
Taihu Lake
