乌梁素海Chl-a时空分布及相关水质因子研究

根据2010年1月-2015年11月乌梁素海水质因子监测数据,分析其Chl-a的时空分布及其与主要水质因子的相互关系.结果表明:河套灌区农田退水对乌梁素海Chl-a浓度变化产生较大影响,入口区高于湖心区与出口区.从空间分布上来看,Chl-a浓度分布呈现出入口区>湖心区>出口区的趋势;从时间分布上来看,呈现5月份>7月份>3月份>11月份>9月份>1月份,枯水期>丰水期>平水期.在采样时间段内,Chl-a与NO3-N与NO3-含量比成正比.

Study on Temporal and Spatial Distribution of Chl-a and Correlative Water Quality Factors in Wuliangsuhai Lake

According water quality monitoring data of Wuliangsuhai Lake during January 2010 to November 2015, this paper analyze the temporal and spatial changes and trends of Chl-a distribution.The correlation between the main water quality factors and Chl-a was studied.The result show that the farmland withdrawal water of Hetao irrigation area have a great influence on the change of NO3 -N, TP, TN and NO3-N concentration in Wuliangsuhai Lake.The Chl-a concentration of inlet sector was signifi-cantly higher than that of center and outlet area, and that was associated with ecological water supplement measures in 4-5 months of each year, and the values were arranged according to inlet sector>center>outlet sector.In the view of time distribution it was arranged according to May>July>March>November>September>January and according to the water yield period it trend as low water period>abundant water period>normal water period.Chl-a and BOD5 ,NO3-N,TP and KMnO4 were significantly correlated during the sampling period, The concentration of Chl-a increases as the ratio of NO3-N and NO3- gets bigger, the content of Chl-a factor curve can be explained concentration of Chl-a well in each partition, showed a highly positive correlation.