摘要
采用基于GA优化的普适卡森指数公式,利用聊城市东昌湖2003—2008年的实际监测数据,对东昌湖水体近年富营养化动态变化趋势进行了系统的分析。结果表明：东昌湖各站点自2003—2008年均处于富营养化水平,从2003~2008年TSIG指数值随年际变化有一定起伏,但自2006年后基本呈逐步上升趋势;从空间来看,北、东、南3个站点的TSIG指数值随年际变化趋势基本一致,但西关桥的曲线变化起伏较大,特别是在2003年西关桥TSIG指数值较其他3个站点有明显上升;在季度变化方面,4个站点春、夏、秋季TSIG指数值变化均不大,但在冬季都有很明显的下降;另外,各指标加权值比较表明,在所选用的4个评价指标中,对湖泊富营养化贡献大小依次为TN〉pH〉TP〉DO。
Based on the approach TSIG,A systematic analysis of the dynamic changing tendency in recent years of Dongchang Lake eutrophication was made.It showed that the state of Dongchang Lake has been eutrophic since 2003.The TSIG index values have an annual fluctuation from 2003 to 2008,and showed a gradual upward trend since 2006.In the view of space distribution,the inter-annual variation trend of north,east,and south sites are the same,but the curve of Xiguan Bridge fluctuated considerably,especially in 2003,the TSIG index value had a marked increase compared with the other three sites.As the result showed that the changes in the quarter,the index value changes a little in spring,summer,and autumn,but had a noticeable decline in the winter.Furthermore,comparison of the weighted values showed that the order of the four water quality factors were TN〉pH〉TP〉DO according to the contribution to eutrophication in method TSIG.
出处
《海洋湖沼通报》
CSCD
北大核心
2010年第4期16-22,共7页
Transactions of Oceanology and Limnology
基金
典型北方缺水城市湖泊水质水量保障与生境改善技术(2008ZX07106-003)资助
关键词
富营养化
东昌湖
GA优化
普适卡森指数公式
eutrophication
Dongchang Lake
GA optimization
carson universal index formula
