Abstract:Based on the 210Pb and 137Cs dating, the article analyzes the vertical and lateral changes in their physical and chemical features that have happened to the lake sediment in Sancha Lake in Sichuan Province, Southwestern China. It shows the changes of Sancha Lake sediment contents and deposition rates are closely related to human activities and lake eutrophication progress. The changes of total nitrogen (TN), total phosphorus (TP) and total organic carbon (TOC) concentrations in the lake sediment strongly coincide with that of Sancha Lake water quality. When the reservoir was first built, the lake water was in an oligotrophic state. As human activities increased, the water quality started to deteriorate and continued to do so. Human activities such as manufacturing, farming, fishing, and tourism have accelerated the eutrophication of Sancha Lake. The key to improve the water quality lies in limiting human activities. The most important source of phosphorus in sediment is from cage culture. It takes a very long time for the phosphorus concentration in the sediment to actually go down after such practices cease.
贾滨洋, 付文丽, 于静, 张聪, 唐亚. 三岔湖沉积物揭示的湖泊营养化进程与人类活动的关系[J]. 中国环境科学, 2013, 33(9): 1638-1644.
JIA Bin-Yang, FU Wen-Li, YU Jing, ZHANG Cong, TANG Ya. Relationship among sediment characteristics, eutrophication process and human activities in the Sancha Lake, Sichuan, Southwestern China. CHINA ENVIRONMENTAL SCIENCECE, 2013, 33(9): 1638-1644.