首页> 外文期刊>International journal of ecohydrology and hydrobiology >Ecohydrological systemic solutions for reduction of siltation, eutophication and dioxin-induced toxicity. The pilot study of the Asella BioFarm Park lake, Ethiopia
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Ecohydrological systemic solutions for reduction of siltation, eutophication and dioxin-induced toxicity. The pilot study of the Asella BioFarm Park lake, Ethiopia

机译:减少淤积,富营养化和二恶英诱导的毒性的生态水文系统解决方案。埃塞俄比亚Asella BioFarm Park湖的试点研究

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摘要

This study introduced the spatial pattern of PCDD, PCDF and dl-PCB concentration in the sediments of Ethiopian small river-lake system. Among the analyzed samples the highest contamination was observed in the lake littoral (222.11 ng kg~(-1) d.w.). The lowest concentration was noted at the outflow from the lake (26.65 ng kg~(-1) d.w.). The WHO-TEQ concentrations showed decreasing trend along the river-lake system with highest value in the inflow (2.32 ng TEQ kg~(-1) d.w.) and the lowest at the outflow (0.55 ng TEQ kg~(-1) d.w.). The concentration of PCDD, PCDF and dl-PCB in the lake causes diseases among local population and prevents of use of water resources except from the outflow. Moreover the lake persistence and its ecosystem services provided for the local community were endangered by erosion of land and nutrient load from pastoral landscape, which could generate toxic algal blooms. For reversing the lake pollution the ecohydrological systemic solutions which integrated methodology to prevent all those threats to sustainable water and ecosystems was designed and implemented.
机译:这项研究介绍了埃塞俄比亚小河湖系统沉积物中PCDD,PCDF和dl-PCB浓度的空间格局。在分析的样本中,沿湖的污染最高(222.11 ng kg〜(-1)d.w.)。最低浓度是从湖中流出的(26.65 ng kg〜(-1)d.w.)。 WHO-TEQ浓度沿河湖系统呈下降趋势,流入量最高(2.32 ng TEQ kg〜(-1)dw),最低值流出(0.55 ng TEQ kg〜(-1)dw)。 。湖泊中PCDD,PCDF和dl-PCB的浓度在当地人口中引起疾病​​,除了流出外,都无法利用水资源。此外,湖泊的持久性及其为当地社区提供的生态系统服务受到土地侵蚀和牧草景观养分负荷的威胁,这可能产生有毒的藻华。为了扭转湖泊污染,设计并实施了生态水文系统解决方案,该解决方案综合了方法学,可防止对可持续水和生态系统的所有威胁。

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