高原再生水湖泊的水体透明度及其影响因素.doc

高原再生水湖泊的水体透明度及其影响因素 　　摘要：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、CODCr、N/P、TN、NH4-N、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33.6 cm）相对低于水生植物较多、水质状态较好的东区（平均值61.5 cm）；翠湖水体透明度与T、pH、DO、Chla、TP、SS、CODCr显著负相关（p0.01），而与N/P、TN呈极显著正相关（p0.01），Chla是影响翠湖水体透明度的主要直接影响因素，CODCr、TP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。 　　关键词：昆明翠湖；高原湖泊；再生水；透明度；相关性分析 　　中图分类号：X524 文献标志码：A 文章编号：1672-1683（2015）06-1084-05 　　Abstract：Cuihu Lake in Kunming City is a plateau lake recharged by reclaimed water.Based on four periods of week-long diurnal monitoring water quality data in Cuihu Lake from May to October in 2013，the spatial and temporal distributions of water transparency and the relationship between transparency and T （water temperature），pH，DO，Chla （Chlorophyll a），TP，SS，CODCr，N/P，TN，NH4-N，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 （averaged 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 CODCr （p0.01），and positively correlated with N/P and TN （p0.01）.Chla is the primary and important factor affecting water transparency in Cuihu Lake，and CODCr，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. 　　Key words：Cuihu Lake；plateau lake；reclaimed water；transparency；correlation analysis 　　水体透明度反映水体清澈/混浊程度[1]，直接影响公众视觉、决定水体景观功能，也是影响浮游植物