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首页> 外文期刊>Journal of water and health >Trend in river water quality: tracking the overall impacts of climate change and human activities on water quality in the Dez River Basin
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Trend in river water quality: tracking the overall impacts of climate change and human activities on water quality in the Dez River Basin

机译：河水质量的趋势：跟踪气候变化和人类活动对Dez河流域水质的整体影响

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摘要

A perceptible degradation in water quality complicates safe water supply for drinking and irrigation purposes. Therefore, this study aims at monitoring water quality changes and effective factors in the Dez River Basin, which are required to manage water resources effectively. To this end, the common influence of flow rate changes on water quality was separated by implementing seasonal Mann-Kendall test on residuals resulting from the LOWESS test. The results show that after adjusting the effects of seasonality and streamflow fluctuations, significant positive trends in most water quality parameters are still observed. It emphasizes the role of other factors controlling river water quality in the basin. Comparison of the trends of modified quality parameter time series (residuals) in different subbasins having natural or mad-made conditions, with or without significant groundwater resources, shows almost the same presented trends in water quality. This supports that, overall, minor changes occurred in land use, groundwater table, and environmental and human factors with no important influences on presented trends in water quality. Our analyses show that overall reduction in precipitation as well as positive trends in temperature and evaporation led to intensified streamflow variations, explaining the main changes in the river water quality of the basin.
机译：水质的可感知降解使饮用和灌溉目的的安全供水使水。因此，本研究旨在监测Dez River盆地的水质变化和有效因素，这需要有效地管理水资源。为此，通过在洛杉矶测试产生的残留物上实施季节性Mann-Kendall测试，分离了流速对水质变化的共同影响。结果表明，在调整季节性和流出的效果后，仍然观察到大多数水质参数的显着正趋势。它强调了控制盆地河水质量的其他因素的作用。在不同亚副遗传媒介中具有自然或疯狂的条件的改进质量参数时间序列（残留物）趋势的比较，有或没有明显的地下水资源，呈现出水质几乎相同的趋势。这支持土地使用，地下水表和环境和人类因素的总体，小型变化，对水质趋势没有重要影响。我们的分析表明，降水总体降低以及温度和蒸发的积极趋势导致加剧流动变化，解释了盆地河水质量的主要变化。

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