赵苇航 1朱彧 2朱亮 3滕荣国 1张岳庆 2秦湘4
作者信息
- 1. 河海大学浅水湖泊综合治理与资源开发教育部重点实验室，江苏南京 210098
- 2. 河海大学环境学院，江苏南京 210098
- 3. 河海大学港口海岸与近海工程学院，江苏南京 210098
- 4. 河海大学水利工程科学与水文水资源国家重点实验室，江苏南京 210098
- 折叠
摘要
Abstract
A long series of water quality parameters of Changdang Lake was analyzed using the Mann -Kendall method, which is a non-parameter statistical test method .The water quality of the lake was evaluated with the fuzzy comprehensive evaluation method , and the main factors influencing the water quality were determined .Trend analysis shows that pH , EC, DO, BOD, COD, TP, CODMn , and SS had an increasing trend , while SD, NH3-N, TN, fecal coliform , and petroleum had a decreasing trend in the lake .Over the past eight years , SS has increased sharply , SD has decreased , and oxygen consumption parameters have increased significantly , indicating that the water quality of Changdang Lake has deteriorated .SS had an abrupt change point exceeding the extremely significant reliability line (α=0.01);BOD, COD, and SS had abrupt change points between the significant reliability line (α=0.05) and the extremely significant reliability line (α=0.01);and the other abrupt change points were between two significant reliability lines .Analysis of the abrupt change frequency and time shows that abrupt changes mainly occurred in years 2006, 2008, and 2012, and the change of COD was most complex , while the change trends of SD and petroleum were easiest to follow .Fuzzy comprehensive evaluation shows that the water quality of Changdang Lake changed insignificantly during the period from 2005 to 2009.Since the year 2009, with the effects of BOD , COD, TN, and CODMn , the water quality of Changdang Lake has decreased from class III to class IV .关键词
水质变化趋势/影响因子/Mann-Kendall法/模糊综合评价/长荡湖Key words
water quality change trend/impact factor/Mann-Kendall method/fuzzy comprehensive evaluation/Changdang Lake分类
资源环境
