Management reduces E-coli in irrigated pasture runoff
Management reduces E-coli in irrigated pasture runoff
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DOI：
10.3733/ca.v061n04p159
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发表时间：
2007-10-01
影响因子：
1.3
通讯作者：
Atwill, Edward R.
中科院分区：
文献类型：
--
作者：
Knox, A. Kate;Tate, Kenneth W.;Atwill, Edward R.
微生物污染物长期污染着加州的许多水体，其中一些污染物会导致人类患病。在众多来源中，灌溉牧场的径流已被确定为改善水质的重要监管目标。这项研究考察了减少灌溉牧场中牛的大肠杆菌污染的可能性。在调查的14个灌溉事件中，我们发现三种处理组合的大肠杆菌浓度最低：通过自然湿地过滤径流，降低径流速率，以及在灌溉前至少一周让牧场停止放牧。需要对牧场和尾水进行综合管理，以显著降低径流中的大肠杆菌浓度。
Microbial pollutants, some of which can cause illnesses in humans, chronically contaminate many California water bodies. Among numerous sources, runoff from irrigated pastures has been identified as an important regulatory target for improving water quality. This study examined the potential to reduce E. coli contamination from cattle in irrigated pastures. During the 14 irrigation events examined, we found that E. coli concentrations were lowest with a combination of three treatments: filtering runoff through a natural wetland, reducing runoff rates, and letting the pasture rest from grazing at least a week prior to irrigation. Integrated pasture and tailwater management are required to significantly reduce E. coli concentrations in runoff.