摘要
对南四湖水生植被区、农田居民地、养殖区、自然水面的29个采样点表层底泥TN、TP和TOC的含量进行分析,揭示了不同地表覆被下表层底泥中营养元素的分布特征,通过对底泥和上层覆水所含营养元素进行相关分析,探讨了营养元素的可能来源。利用有机指数,对底泥有机污染进行了分析。结果表明:南四湖养殖区和农田居民地已经出现富营养化现象,水生植被区和自然水面还尚未受到富营养化威胁。表层底泥的TN主要来自内源有机氮,TP主要来自外源无机磷。
Based on all the 29 samples taken from aquatic vegetation area, agricultural and residential area, fish culture area, natural water of Nansihu Lake, the contents of TN, TP and TOC of water surface sediments were analyzed and the characteristics of the nutrient distribution were examined in the study. Through the analysis of correlation of surface sediments and the water, the origins of these nutrients were discussed, and the level of pollution was analyzed with the organic index. The results indicated that the eutrophication had appeared in agricultural area, residential area and fish culture area, but the aquatic vegetation area and natural water were not threatened by eutrophication. On the other hand, the source of TN in surface sediments was mainly from the organic nitrogen of Nansihu Lake, and the source of TP was mainly from the inorganic phosphorus outside the lake.
出处
《水土保持研究》
CSCD
北大核心
2012年第3期185-189,301,共5页
Research of Soil and Water Conservation
基金
临沂大学水土保持与环境保育重点实验室开放基金(201102)
国家水体污染控制与治理科技重大专项(2009ZX07210-007-01)
关键词
富营养化
表层底泥
地表覆被
南四湖
eutrophication
surface sediment
surface land cover
Nansihu Lake
