Source apportionment of nutrients in Estonian rivers
Source apportionment of nutrients in Estonian rivers
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DOI：
10.1016/j.desal.2007.02.108
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发表时间：
2008-06
期刊：
影响因子：
9.9
通讯作者：
A. Vassiljev;I. Blinova;P. Ennet
中科院分区：
文献类型：
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作者：
A. Vassiljev;I. Blinova;P. Ennet
营养负荷过高造成的富营养化是爱沙尼亚地表水的主要问题。为了成功执行《水框架指令》，需要对集水区可能对水体状况造成影响的人类活动的类型进行评估。缺乏必要的信息往往使执行这项任务变得困难。在这项调查中使用了简单出口系数法来评估不同营养物质来源对爱沙尼亚河流水质的影响。人们的注意力主要集中在弥漫污染源(自然和人为)上。采用非线性回归方法估算输出系数和养分滞留量。结果显示，即使是在爱沙尼亚这样的小国，出口系数也在很大范围内变化。土壤类型、地形、气候条件和水流是影响出口系数的主要自然因素。结果表明，使用对其他区域估计的出口系数可能会导致关于不同扩散源对水体状况的影响的错误结论。
Eutrophication caused by excess nutrient loads is the main problem for Estonian surface waters. The assessment of the type of human activity on the catchment area that may cause an impact on the status of a water body is needed for successful implementation of the Water Framework Directive. The lack of necessary information often makes it difficult to perform this task. The simple export coefficients approach has been used in this investigation for evaluation of the impact of different sources of nutrients on the water quality in Estonian rivers. Attention has mainly been concentrated on the diffuse pollution sources (natural and anthropogenic). Nonlinear regression was used for the estimation of the export coefficients and retention of nutrients. Results revealed that the export coefficients vary within a wide range of limits even in such a small country as Estonia. Soil type, topography, climatic conditions and water flow are the main natural factors influencing export coefficients. It was demonstrated that the use of export coefficients estimated for other regions may lead to wrong conclusions about the impact of different diffuse sources on the water body status.