洞庭湖水质的时间序列分析

Time Series Analysis of Dongting Lake Water Quality

选取洞庭湖3个湖区中的典型断面2005-2011年的CODMn、NH3-N、TN、TP、Chl.a浓度监测数据,运用季节性时间序列分析法对洞庭湖水质变化特征进行分析,结果表现为:小河嘴断面的CODMn、TP的浓度显著下降,NH3-N的浓度无趋势,TN、Chl.a的浓度显著上升;横岭湖断面的CODMn、NH3-N、TP的浓度显著下降,TN、Chl.a的浓度显著升高;洞庭湖出口断面的浓度CODMn、NH3-N的浓度显著下降,TP的浓度无变化趋势,TN、Chl.a浓度显著上升。

Based on monitoring data of water quality parameters including CODMn, NH3-N, TN, TP, Chl.a concentration in Dongting lake in 2005 - 2011, water quality change characteristics of Dongting lake were analyzed by seasonal time series analysis method .The results showed that： CODMn, concentration of TP in Xiaohezui section decreased significantly, concentration ofNH3 - N didn＇t change, TN, Chl.a concentration significantly increased; CODMn, NH3-N and TP concentration in Henglinghu lake section decreased significantly, TN, Chl.a concentration significantly increased; CODMn , NH3-N concentration in outlet section of Dongting lake decreased significantly, TP concentration didn＇t change, TN, Chl.a concentration significantly increased.