高坝洲水库增殖放流后水域理化特征研究

2010年3月至2011年12月在高坝洲水库增殖放流滤食性鱼类后,对水域理化因子进行了常规监测,并对监测数据进行了比较分析.结果显示,2011年库区水域TN、NO2-N、NO3-N、TP、COD、Chl.a等理化因子月平均含量依次为1.389 mg/L、0.0396 mg/L、12117mg/L、0.1373mg/L、16.191mg/L、10.2268 mg/m3,2010年月平均含量依次为1.659 mg/L、0.066 2 mg/L、1.472 9 mg/L、0.099 9 mg/L、18.315mg/L、14.917 8 mg/m3,2011年库区水域理化指标要明显低于2010年.对卡尔森营养状态指数(TSIM)的计算结果表明,2011年库区TSIM低于2010年,分别为53.78、57.36,库区水体总体上处于轻度富营养化水平(TSIM＞53),高坝洲库区水域生态修复需增加滤食性鱼类的投放数量.

Study on Physical and Chemical Characteristics of Water in Gaobazhou Reservoir after Filter-Feeding Fishes Stocking

Water physical and chemical characteristics of Gaobazhou reservoir were monitored from March,2010 to December 2011 when different amounts of filter-feeding fishes were stocked in this reservoir.Results showed that the average of TN,NO2-N,NO3-N,TP,COD and Chl.a were 1.389 mg/L,0.039 6 mg/L,1.211 7 mg/L,0.137 3 mg/L,16.191 mg/L,10.226 8 mg/m3 in 2011,respectively;and 1.659 mg/L,0.066 2 mg/L,1.472 9 mg/L,0.099 9 mg/L,18.315 mg/L,14.917 8 mg/m3 in 2010,respectively.The average of TN,NO2-N,NO3-N,TP,COD and Chl.a in 2011 were lower than them in 2010.The TSIM in 2011 was 53.78,lower than in 2010,which showed a TSIM 57.36.The whole reservoir area revealed mild eutrophication(TSIM>53),and it suggested that the stocked filter-feeding fishes amount could be increased in the reservoir.