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首页> 外文期刊>Estuarine Coastal and Shelf Science >Anthropogenic changes in the fluxes to estuaries: Wastewater discharges compared with river loads in small rias
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Anthropogenic changes in the fluxes to estuaries: Wastewater discharges compared with river loads in small rias

机译：河口通量的人为变化：小河口的废水排放量与河水负荷相比

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The modification of chemical inputs into estuaries/rias by wastewater discharges is poorly documented. Concentrations and fluxes of nutrient salts, organic matter and trace metals in rivers and wastewaters to the mesotrophic Rias of Ortigueira (38 km(2)) and Viveiro (27 km(2)), located on the western Cantabrian coast (Bay of Biscay), were evaluated to assess changes in the land-sea fluxes. Water was sampled monthly during a year in the Mera (6.0 m(3) s(-1)) and Landro (9.4 m(3) s(-1)) rivers flowing into the Rias of Ortigueira and Viveiro, respectively. The urban effluents of Ortigueira (1800 inhabitants; treated sewage) and the Viveiro (7100 inhabitants; municipal treated sewage and untreated industrial wastewaters) were also monitored. Concentrations of chemical compounds and their fluxes were quite similar and close to pristine conditions in both rivers. Nitrate (98% of DIN), the limiting nutrient of ria primary production, was controlled by river flow while phosphate by wastewater discharge. Sewage discharges should not disturb the Ria of Ortigueira. Wastewaters fluxes of phosphate, POC, PON, dissolved Cu and particulate Cd, Cu and Zn into the Ria of Viveiro exceeded those of the Landro River, mainly during summer. Also, untreated wastewater effluents from fish food processing in such small fishing ports can be a source of contamination. The Rias of Ortigueira and Vivieiro are a reference point to evaluate fluvial pristine conditions and wastewater discharges on small estuary-ria receptor systems. (C) 2015 Elsevier Ltd. All rights reserved.
机译：关于废水排放对河口/口岸的化学物质投入的修改文献很少。河流和废水中的营养盐，有机物和微量金属的浓度和通量，位于坎塔布连西部海岸（比斯开湾）的中营养Ortigueira Rias（38 km（2））和Viveiro（27 km（2））进行了评估，以评估陆海通量的变化。一年中每月分别在流入Ortigueira和Viveiro里亚斯河的Mera（6.0 m（3）s（-1））和Landro（9.4 m（3）s（-1））河流中取样水。还监测了Ortigueira（1800居民；处理过的污水）和Viveiro（7100居民；市政处理过的污水和未经处理的工业废水）的城市污水。在这两个河流中，化合物的浓度及其通量非常相似，接近原始条件。硝酸盐（98％的DIN）是日本一次生产的限制性养分，而河水则控制着硝酸盐的含量，而废水的排放则控制了磷酸盐的含量。污水排放不应干扰Ortigueira的Ria。磷酸盐，POC，PON，溶解的铜以及Cd，Cu和Zn颗粒进入Viveiro河口的废水通量超过了兰德罗河，主要是在夏季。同样，在如此小的渔港中，鱼类食品加工过程中未经处理的废水会成为污染源。 Ortigueira和Vivieiro的Rias是评估小河口受体系统上河流原始状况和废水排放的参考点。 （C）2015 Elsevier Ltd.保留所有权利。

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