Spatial and temporal variations of eutrophication of Hanshiqiao Lake in Northern China
Wetland eutrophication mainly results from excessive nutrients input is the leading causes of water quality impairment. The research outcomes of distribution of eutrophication can provide scienfic basis for control and treatment of wetland. In the paper, based on field data of water quality of June, 2012, November, 2012 and April, 2013, distribution feature on time and space of eutrophication was analyzed. Geographical information system (GIS) and trophic state index (TSI) consisting of four physical, chemical and biological indicators including total phosphorus (TP), total nitrogen (TN), chemical oxygen demand (COD), and chlorophyll-a concentration (Chl-a) was constructed to describe the eutrophication state of the lake environment. It showed that eutrophication level in Hanshiqiao Lake varied in different months and different locations. November had the larger TSIs, indicating that eutrophication level of this period was serious. The location near of site-6 was far more than other sites and site-5 was less. Potential eutrophication assessment showed that Hanshiqiao Lake was mesotrophic in June and April while upper-mesotro-phic in November. The physical background will be further investigated in the on-going study.
Hanshiqiao Lake eutrophication spatial distribution temporal distribution
S.R.Wu Y.W.Zhao
State Key Laboratory of Water Environment Simulation, Beijing 100875, China;School of Environment, Beijing Normal University, Beijing 100875, China
国际会议
The 3rd Biennial ISRS Symposium Achieving Healthy and Viable Rivers (ISRS)第3届国际河流大会
北京
英文
411-417
2013-08-05（万方平台首次上网日期，不代表论文的发表时间）