文章基本信息

标题：ECOSYSTEM SERVICE EVALUATION OF STREAMS FOR NUTRIENT AND BACTERIA PURIFICATION IN A GRAZED WATERSHED
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作者：Theodoros Chalazas ; Ourania Tzoraki ; David Cooper 等
期刊名称：Fresenius Environmental Bulletin
印刷版ISSN：1018-4619
出版年度：2017
卷号：26
期号：12A
页码：7849-7859
语种：English
出版社：PSP Publishing
摘要：The importance of sustainable development of river systems based on ecological and socio-economic criteria is widely recognized. The ^Integrated Valuation of Ecosystem Services and Tradeoffs” (InVEST) model, an ecosystem based model which couples biophysical and economic models, is used to examine the nutrient and bacteria mitigation processes in the ungauged grazed area draining to the Gulf of Kalloni, a semi-enclosed bay in Lesvos, Greece. Point sources and grazing land loads are neglected by the InVEST model, leading to poor estimation of nutrient loads at this site. We include additional terms to account for these sources. We also apply climate change scenarios to assess their likely impact on nutrient export and hydrology over the drainage area. We show that the nutrient mitigation capacity is currently exceeded in four sub-basins with a compensation cost of up to 20 million dollars over a 20 year period.
关键词：Streams;Nutrients;Bacteria;Farming loads;Water Purification