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Influence of Climate Extremes and Land Use on Fecal Contamination of Shallow Tubewells in Bangladesh

Citation

Wu, Jianyong; Yunus, Mohammad; Islam, M. Sirajul; & Emch, Michael E. (2016). Influence of Climate Extremes and Land Use on Fecal Contamination of Shallow Tubewells in Bangladesh. Environmental Science & Technology, 50(5), 2669-2676. PMCID: PMC4775353

Abstract

Climate extremes in conjunction with some land use practices are expected to have large impacts on water quality. However the impacts of land use and climate change on fecal contamination of groundwater has not been well characterized. This work quantifies the influences of extreme weather events and land use practices on E. coli presence and concentration in groundwater from 125 shallow wells, a dominant drinking water resource in rural Bangladesh, monitored over a 17-month period. The results showed that E. coli presence was significantly associated with the number of heavy rain days, developed land and areas with more surface water. These variables also had significant impacts on E. coli concentration, with risk ratios of 1.52 (95% CI = 1.08, 1.81), 1.07 (95% CI: 1.05, 1.09), and 1.02 (95% CI = 1.01, 1.03), respectively. Significant synergistic effects on E.coli presence and concentration were observed when land use and weather variables were combined. The findings suggest that climate extremes and land use practices, particularly urbanization, might promote fecal contamination of shallow well water, thus increasing the risk of diarrheal diseases.

URL

http://dx.doi.org/10.1021/acs.est.5b05193

Reference Type

Journal Article

Year Published

2016

Journal Title

Environmental Science & Technology

Author(s)

Wu, Jianyong
Yunus, Mohammad
Islam, M. Sirajul
Emch, Michael E.

PMCID

PMC4775353