昆明市的翠湖是一个以再生水为主要水源的高原城市景观湖泊。利用 2013 年 5 月- 10 月四期( 每期连续一 周) 的翠湖水质监测数据, 对其水体透明度( SD) 的时空分布, 及其与水温( T )、 pH、 DO、 Chla(叶绿素 a)、 TP、 SS、 COD Cr 、 N/ P、 TN、 NH 4 2N、 DTP、 DTN 的相关性进行了分析, 并以 SD 为因变量, 以各水环境因子为自变量进行了多 元线性回归分析。结果显示, 水生植物少、 水质较差的湖泊西区水域透明度(平均值 33 16 cm) 相对低于水生植物较 多、 水质状态较好的东区( 平均值 61 1 5 cm); 翠湖水体透明度与 T、 pH、 DO、 Chla、 T P、 SS、 COD Cr 显著负相关( p < 0101) , 而与 N/ P、 T N 呈极显著正相关( p< 0 1 01), Chla 是影响翠湖水体透明度的主要直接影响因素, COD Cr 、 T P 是 影响藻类生长的主要水质因子。研究结果为以高原城市再生水湖泊翠湖水体透明度的改善及景观价值的提升提供 了科学依据。

Cuihu Lake in Kunming City is a plateau lake recharged by reclaimed water. Based on four periods of week2long diurnal monitoring water quality data in Cuihu Lake from May to October in 2013, the spatial and temporal distributions of water trans2 parency and the relationship between transparency and T ( water temperature), pH, DO, Chla ( Chlorophyll a) , TP, SS, COD Cr , N/ P, TN, NH 4 2N, DTP, and DTN were analyzed. Additionally, SD was considered as the dependent variable, multiple regression analysis was conducted for each water environment factor. The results indicated that the water transparency in Cuihu Lake is lower in the western area (averaged 33. 6 cm, with deeper water and fewer aquatic plants) and higher in the eastern area (aver2 aged 61. 5 cm, with more aquatic plants and better water quality). The correlation analysis and multiple regression analysis showed that water transparency is negatively correlated with T, pH, DO, Chla, TP, SS, and COD Cr ( p< 0. 01) , and positively cor2 related with N/ P and T N ( p< 0. 01) . Chla is the primary and important factor affecting water transparency in Cuihu Lake, and COD Cr , TP are two significant water quality factors to impact the algae growth in Cuihu Lake. The research results can provide scientific reference for the improvement of water transparency and landscape value in plateau lake recharged by reclaimed water.

国家水体污染控制与治理科技重大专项( 2012ZX07302002)