Abstract：In order to protect the ecological environment of Lihu lake, the main environmental problem of Lihu lake was recognized based on the investigation of its overlying water and sediment as well as the benthic organisms. According to investigation results, the paper established sediment quality comprehensive evaluation system composing of one target layer, three element layers, and ten index layers to evaluated the sediment quality inLihu lake. Results showed that as for the sediment of Lihu lake, the relative important order of the three index layers was sediment pollution characteristics (0.522)>ecological characteristics (0.32)>water pollution characteristics (0.146). Benthic biodiversity index (0.282), ammonia flux (0.208), water quality classification (0.128), and phosphorus flux (0.109) had much more influence among the 10assessment index in the index layer. Sediment quality comprehensive index (SQCI) of Lihu sediments was 49~79, and sediment quality classification of Lihu Lake was slightly polluted and moderately polluted. SQCI in west Lihu lake was higher than that in east Lihu Lake, and central lake was higher than coastal areas. Results of multi-regression analysis between evaluation indexes and SQCI indicated that release of nitrogen and phosphorus in sediments and single benthic biodiversity were the main problems of Lihu Lake sediments. The assessment results were coincident with the Lihu Lake situations, and the study may have some implications for the sediment quality evaluation of other lakes.
李佳璐, 姜霞, 王雯雯, 王书航, 赵丽. 蠡湖沉积物质量评估体系的构建[J]. 中国环境科学, 2015, 35(2): 565-573.
LI Jia-Lu, JIANG Xia, WANG Wen-Wen, WANG Shu-Hang, ZHAO Li. Preliminary evaluation of the sediment quality for Lihu Lake. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(2): 565-573.
