基于数理统计的水功能区达标评价方法  

Research on water function area evaluation based on mathematical statistics method

作　　者：王佳[1] 魏文杰[1] 董飞[2] 姜国珍[3] 张新华[1] 

机构地区：[1]四川大学水力学及山区河流开发保护国家重点实验室,四川成都610065 [2]中国水利水电科学研究院水环境研究所,北京100038 [3]四川大学后勤集团,四川成都610065

出　　处：《水资源保护》2016年第1期154-160,共7页Water Resources Protection

基　　金：中央分成水资源费项目(1261330111042);国家自然科学基金(51379137)

摘　　要：在水功能区达标评价工作中,针对相同的水质数据,采用年均值法和频次法这两种水功能区达标评价方法评价,其评价结果可能截然不同。为了能够科学、合理地选择评价方法,笔者引入P-Ⅲ型曲线等数理统计分析方法,从水质监测数据结构特征进行了分析研究,得到了年均值法和频次法的适用条件和范围,当水质数据满足CvCs≤0.5且Cs≤2采用年均值法,反之采用频次法。此结论在大凌河流域和沱江流域的应用中得到了验证,同时解决了不同方法评价所产生评价结果的矛盾性,为水资源管理规划工作提供了有力的依据。Different assessment results may be obtained through annual average method and frequency method evaluating water function zones with same water quality data, during water function area compliance evaluation work. In order to choose the evaluation method scientifically and reasonably, Mathematical statistics analysis methods including Pearson Ⅲ curve was introduced and the characteristic of water quality monitoring data was analyzed. In the end, the applying conditions and range of annual average method and frequency method are acquired. When the water quality data meeting CvCs≤0.5,Cs≤2 , annual average method should be applied, otherwise frequency method should be chosen. Two case studies have been conducted in the northern Daling River basin and the southern Tuojiang River basin, respectively, to verify the conclusion. The contradiction between the evaluation results of different methods is solved, providing strong basis for water resource management and planning.

关 键 词：水功能区 达标评价 频次法 年均值法 P-Ⅲ型曲线 

分 类 号：TV212.4[水利工程—水文学及水资源]