候鸟迁徙与降雨对城市景观水体水环境的影响研究

Effect of Migratory Birds and Rainfall on Water Quality of Urban Landscape Lakes

针对城市景观水体水资源承载力和水环境容量低,污染主要来源于人类活动和城市面源的典型特点,提出了"水质特征期"模型,并以昆明翠湖为案例分析,在其全年水质监测基础上,重点分析了候鸟迁徙与降雨对昆明翠湖的水质影响,开展了评价方法的应用。结果表明,翠湖主要分为人类活动主导特征期(11-次年4月)和降雨影响主导特征期(5-10月),红嘴鸥排泄物与地表径流是翠湖磷元素的重要来源,其TP输入分别占年输入总量的38.4%和33.49%。研究成果为城市景观水体的评价与治理提供了新的方法和典型案例。

Low proficiency of water resource balance and water environment capacity is a typical feature of urban landscape waters,but the pollution which comes mainly from human activities and urban non-point source pollutant is critical. A model of the period of water quality characteristics was proposed for evaluating in this paper,and it was successfully applied to a case study in Cuihu Lake in Kunming. The results of annual water quality monitoring were selected as parameters to evaluate water environment affected by migratory birds and wet deposition. The results indicated that the period of human activity characteristics（November-April）and the period of rainfall characteristics（May-October）were the typical periods of Lake Cuihu. Besides,it also showed that total phosphorus of total annual input accounted for 38.4% and 33.49% respectively,which mainly originated in Larus ridibundus＇ droppings and overland runoff. The study can provide new methodology and case study for evaluating urban landscape water bodies.