Environmental risk assessment could be a valuable tool for water management since it can simulate the potential response of the aquatic system to changes such as the addition of organic pollution, an increase in nutrient levels or water abstraction rates and changes in sewage treatment operations. The negative effects of human activity on water quality are manifested both by the contamination of resources and by violation of the natural conditions of water circulation. This study aims to determine the relationships between anthropogenic activities, stressors and adverse effects based on previously acquired knowledge about the state of water quality in the Laborec River and the sources of pollution in the river basin. The exposure profile, developed within this research, is the output of an analysis of environmental risks in the studied river basin and is focused on an evaluation of the surface water quality in the Laborec River. The results from the evaluation are following: risk is characterized as acceptable in the upper section of the Laborec basin; it can be characterized as moderate to undesirable in the middle part of the river basin; and the risk is unacceptable in the lower part of the river basin, mainly due to industry. This results can identify the priority areas where measures for decreasing of the water pollution have to be done.

环境风险评估可能是水资源管理的宝贵工具，因为它可以模拟水生系统对变化的潜在反应，例如有机污染的增加、营养水平或取水率的增加以及污水处理操作的变化。人类活动对水质的负面影响表现为对资源的污染和对水循环自然条件的破坏。本研究旨在根据先前获得的关于拉拉雷克河水质状况和流域污染源的知识，确定人为活动、压力源和不利影响之间的关系。在本研究中开发的暴露概况，是所研究流域环境风险分析的输出，重点是对拉拉雷克河地表水质量的评估。评估结果如下：Laborec 盆地上部的风险特征为可接受；流域中部可表现为中度至不良；流域下游的风险是不可接受的，主要是由于工业。该结果可以确定必须采取措施减少水污染的优先领域。流域中部可表现为中度至不良；流域下游的风险是不可接受的，主要是由于工业。该结果可以确定必须采取措施减少水污染的优先领域。流域中部可表现为中度至不良；流域下游的风险是不可接受的，主要是由于工业。该结果可以确定必须采取措施减少水污染的优先领域。