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首页> 外文期刊>Journal of the American Water Resources Association >Influence of Land Use Land Cover on River Water Quality in Rural North Wales, UK
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Influence of Land Use Land Cover on River Water Quality in Rural North Wales, UK

机译：土地利用土地覆盖对北威尔士河水质量的影响

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摘要

Agricultural and rural land management practices can have a significant impact on the health of river ecosystems. In this study, our goal was to quantify the extent of land use influence on river water quality at two catchments in rural North Wales, Conwy and Clwyd. Stream water samples were collected bi-weekly from five sampling sites over a three-month period (September-November 2018) and analyzed in the laboratory to measure six water quality variables, namely, pH, electrical conductivity (EC), phosphorus, nitrate and ammonium concentrations, and bacterial coliform count. We then quantified their relationships with dominant land cover of the contributing catchments using two different land cover classification systems. Significant differences (p 0.05) were observed across the sampling sites for pH, EC, nitrate and phosphorus concentration, and coliform count. Strong correlations were observed between pH and the proportion of Acid Grassland, and between nitrate levels and the proportion of Improved Grassland in the catchment. The presence of high-quality agricultural land correlated positively with nitrate and phosphorus concentrations and bacterial coliform count. Conversely, dominance of poor quality agricultural land correlated with lower levels of all the measured water quality indicators. Our results suggest that the proportion of high-quality agricultural land is a reliable indicator of stream water quality in rural catchments, most likely linked to intensive farming practices.
机译：农业和农村土地管理实践可能对河流生态系统的健康产生重大影响。在这项研究中，我们的目标是在农村北威尔士，康威和克夫文的两个集水区中量化土地利用影响程度。从三个月内（2018年9月至11月）的五个抽样场所（2018年9月至11月）并在实验室分析，测量六个水质变量，即pH，导电性（EC），磷，硝酸盐和硝酸盐和硝酸盐和铵浓度和细菌大肠杆菌计数。然后，我们使用两种不同的土地覆盖分类系统量化了与贡献集水区的主导土地覆盖关系的关系。在对pH值，EC，硝酸盐和磷浓度的采样位点观察到显着差异（P <0.05），以及大肠杆菌计数。在pH和酸草原的比例之间以及硝酸盐水平之间观察到强烈的相关性和集水区改良草地的比例。高质量的农业土地的存在与硝酸盐和磷浓度和细菌大肠杆菌计数相关。相反，质量劣质农业土地的优势与所有测量的水质指标的较低水平相关。我们的研究结果表明，高质量农业用地的比例是农村集水区流水质量的可靠指标，最有可能与密集的农业实践有关。

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