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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 thenmidwest have been channelized for agricultural drainage. Public health implications of waternchemistry and aquatic insects within channelized and unchannelized headwater streams havennot been explored. We sampled water chemistry and aquatic insects in two channelized and twonunchannelized headwater streams in central Ohio from December 2005 until November 2008.nMaximum concentrations of ammonium, nitrate plus nitrite, and chlorothalonil were greater innchannelized streams. Nitrate plus nitrite and atrazine also exceeded drinking water standards morenoften in channelized streams. Maximum concentrations of simazine and the percentage of times itnexceeded the drinking water standards were greater in unchannelized streams. The predictednhazard potential of nutrient and pesticide mixtures was greater in channelized streams. Mosquitonabundance did not differ between stream types. Chironomid abundance was greater in channelizednstreams. Biting dipterans did not exhibit consistent abundance trends and only differed betweennstream types in the summer and fall. Our results suggest that if whole stream uptake of nutrientsnand pesticides is minimal in channelized headwater streams then nutrient and pesticide inputs fromnthese streams may impact downstream drinking water sources. Our results also suggest channelizednand unchannelized headwater streams are not serving as a significant source of mosquitoes.
机译：在美国，源头流构成了大多数流域，而在中西部，许多流域已被引导用于农业排水。尚未研究渠道化和非渠道化的上游水流中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的上游水源中采样了水化学和水生昆虫的样本。硝酸盐加上亚硝酸盐和at去津也经常在渠道水流中超过饮用水标准。在非通道化的溪流中，西马津的最大浓度及其超过饮用水标准的次数百分比更高。营养物质和农药混合物的潜在危害在通道化流中更大。蚊子流的丰度在流类型之间没有差异。通道化流中的手性丰富。咬二足动物并没有表现出一致的丰度趋势，只是在夏季和秋季不同流类型之间存在差异。我们的研究结果表明，如果在渠道化的源头溪流中吸收的全部养分和农药极少，则来自这些溪流的养分和农药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河水并不是蚊子的重要来源。

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