Effect of urbanization on surface water chemistry in south-central Texas
Effect of urbanization on surface water chemistry in south-central Texas
复制标题
城市化对德克萨斯州中南部地表水化学的影响
DOI：
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发表时间：
2011
期刊：
影响因子：
2.9
通讯作者：
Nina C. Stanley
中科院分区：
文献类型：
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作者：
J. Aitkenhead;N. Nahar;C. Harclerode;Nina C. Stanley
使用状态因子可以充分描述相对未受干扰的地表水的生物地球化学和地球化学。城市和郊区土地使用比例不断增加的流域，特别是在亚热带、半干旱和干旱城市地区，利用灌溉草坪和景观的流域可能具有低流量城市特征，这与市政供水商使用的水源水有关。我们考察了十三个流域；德克萨斯州中南部潮湿的亚热带橡树大草原上，有四个拥有废水处理厂（城市化率为 24-67%），四个为农村（城市化率< 30%），五个城市（城市化率为 > 30%）。我们的三个城市和一个农村流域展示了市政自来水的标志。四分之三的设有废水处理厂的流域显示出经过处理的污水的特征。根据这项研究，我们认为城市流域用于灌溉草坪和景观的城市自来水，特别是高钠和碳酸氢盐的化学成分，在与流域土壤相互作用后，可能会对基流水质产生不利影响。
The use of state factors can adequately describe the biogeochemistry and geochemistry of relatively undisturbed surface waters. Watersheds with increasing proportions of urban and suburban land use, particularly in sub-tropical, semi-arid and arid urban areas, that utilize irrigation for turfgrass and landscaping may have a low flow urban signature that relates to the source water used by municipal water suppliers. We examined thirteen watersheds; four with waste water treatment plants (24–67% urbanization), four rural (< 30% urbanization) and five urban (> 30% urbanization) in a humid sub-tropical oak savannah in south-central Texas. Three of our urban and one of our rural watersheds displayed the signature of municipal tap water. Three out of four watersheds with waste water treatment plants displayed the signature of treated sewage effluent. We suggest as a result of this study that the chemistry of municipal tap water particularly that with high sodium and bicarbonate, used in urban watersheds for irrigating turfgrass and landscapes may have detrimental effects on base flow stream water quality after it has interacted with watershed soils.