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首页> 外文期刊>Journal of water and health >Public health perspectives of channelized and unchannelized headwater streams in central Ohio: a case study
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Public health perspectives of channelized and unchannelized headwater streams in central Ohio: a case study

机译：俄亥俄州中部河床河道和非河床河道的公共卫生观点：案例研究

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Headwater streams constitute the majority of watersheds in the United states and many in the midwest have been channelized for agricultural drainage. Public health implications of water chemistry and aquatic insects within channelized and unchannelized headwater streams have not been explored, we sampled water chemistry and aquatic insects in two channelized and two unchannelized headwater streams in central Ohio from December 2005 until November 2008. Maximum concentrations of ammonium, nitrate plus nitrite, and chlorothalonil were greater in channelized streams. Nitrate plus nitrite and atrazine also exceeded drinking water standards more often in channelized streams. Maximum concentrations of simazine and the percentage of times it exceeded the drinking water standards were greater in unchannelized streams. The predicted hazard potential of nutrient and pesticide mixtures was greater in channelized streams. Mosquito abundance did not differ between stream types. Chironomid abundance was greater in channelized streams. Biting dipterans did not exhibit consistent abundance trends and only differed between stream types in the summer and fall. Our results suggest that if whole stream uptake of nutrients and pesticides is minimal in channelized headwater streams then nutrient and pesticide inputs from these streams may impact downstream drinking water sources. Our results also suggest channelized and unchannelized headwater streams are not serving as a significant source of mosquitoes.
机译：在美国，水源流构成了大多数流域，而中西部的许多流域已被渠化以用于农业排水。尚未探索通道化和非通道化源水中的水化学和水生昆虫对公共卫生的影响，我们从2005年12月至2008年11月在俄亥俄州中部的两个通道化和两个非通道化水源中采样了水化学和水生昆虫。通道流中硝酸盐，亚硝酸盐和百菌清的含量更高。硝酸盐加上亚硝酸盐和at去津在渠道水流中也经常超过饮用水标准。在非通道化的溪流中，最高浓度的辛嗪及其超出饮用水标准的百分比更高。营养物质和农药混合物的预计潜在危害在渠道化流中更大。溪流类型之间的蚊子丰度没有差异。通道流中手足节的丰度更高。咬二足动物并没有表现出一致的丰度趋势，只是在夏季和秋季之间溪流类型有所不同。我们的结果表明，如果在渠道化的源头溪流中吸收的全部营养物和杀虫剂极少，则这些溪流中的营养物和杀虫剂输入可能会影响下游的饮用水源。我们的研究结果还表明，河道化和非河道化的上游水流并不是蚊子的重要来源。

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