Fecal contamination in Yongin watershed: association to land use and land cover and stormwater quality

Paule, Ma. Cristina; Ventura, Jey-R; Memon, Sheeraz; Lee, Bum-Yeon; Jahng, Deokjin; Kang, Minji; Lee, Changhee

doi:10.1080/19443994.2014.922281

Cited by 10 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Artificial and agriculture land cover were linked to higher microbial contamination in surface and groundwater 8,9,11,12,114,115 Forests and wetlands may maintain water quality 89…”

Section: Land Covermentioning

confidence: 99%

“…Prior research has identified several factors affecting the microbial quality of surface water and surface water runoff. − In most cases rainfall, temperature, the presence of livestock, and proximity to an urban center were positively associated with concentrations of fecal indicator bacteria (FIB). A number of studies have also investigated the factors affecting groundwater contamination.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

What Environmental Factors Influence the Concentration of Fecal Indicator Bacteria in Groundwater? Insights from Explanatory Modeling in Uganda and Bangladesh

Poulin¹,

Peletz²,

Ercümen

et al. 2020

Environ. Sci. Technol.

View full text Add to dashboard Cite

Information about microbial water quality is critical for managing water safety and protecting public health. In low-income countries, monitoring all drinking water supplies is impractical because financial resources and capacity are insufficient. Data sets derived from satellite imagery, census, and hydrological models provide an opportunity to examine relationships between a suite of environmental risk factors and microbial water quality over large geographical scales. We investigated the relationships between groundwater fecal contamination and different environmental parameters in Uganda and Bangladesh. In Uganda, groundwater contamination was associated with high population density (p < 0.001; OR = 1.27), high cropland coverage (p < 0.001; OR = 1.47), high average monthly precipitation (p < 0.001; OR = 1.14), and high surface runoff (p < 0.001; OR = 1.37), while low groundwater contamination was more likely in areas further from cities (p < 0.001; OR = 0.66) and with higher forest coverage (p < 0.001; OR = 0.70). In Bangladesh, contamination was associated with higher weekly precipitation (p < 0.001; OR = 1.44) and higher livestock density (p = 0.05; OR = 1.11), while low contamination was associated with low forest coverage (p < 0.001; OR = 1.23) and high cropland coverage (p < 0.001; OR = 0.80). We developed a groundwater contamination index for each country to help decision-makers identify areas where groundwater is most prone to fecal contamination and prioritize monitoring activities. Our approach demonstrates how to harness satellite-derived data to guide water safety management.

show abstract

“…Artificial and agriculture land cover were linked to higher microbial contamination in surface and groundwater 8,9,11,12,114,115 Forests and wetlands may maintain water quality 89…”

Section: Land Covermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

What Environmental Factors Influence the Concentration of Fecal Indicator Bacteria in Groundwater? Insights from Explanatory Modeling in Uganda and Bangladesh

Poulin¹,

Peletz²,

Ercümen

et al. 2020

Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Land use practices, particularly urbanization, likely elevate the fecal contamination of shallow well water, increasing the risk of diarrheal diseases [10]. Urbanization and agriculture can also substantially degrade water quality, causing eutrophication and fecal contamination [11,12]. The primary source of the fecal pollution of water sources may be the improper management of human waste, which is often coupled with leakage in sewer pipes, the improper construction of septic tanks, and the use of pit latrines, all of which dispose of human waste in the subsurface [13].…”

Section: Introductionmentioning

confidence: 99%

Identification of Human and Animal Fecal Contamination in Drinking Water Sources in the Kathmandu Valley, Nepal, Using Host-Associated Bacteroidales Quantitative PCR Assays

Malla

Shrestha

Tandukar

et al. 2018

Water

View full text Add to dashboard Cite

This study identified the sources of fecal contamination in the groundwater of different land covers. A total of 300 groundwater samples were collected in the Kathmandu Valley, Nepal, in the dry (n = 152) and wet (n = 148) seasons of 2016. Fecal indicator bacteria were initially enumerated, and then fecal contamination sources were identified using human (BacHum), ruminant (BacR), and pig-associated (Pig2Bac) Bacteroidales quantitative polymerase chain reaction assays. Sixty-six percent (197/300) of the tested groundwater samples had Escherichia coli concentrations higher than the World Health Organization threshold for drinking (<1 most probable number/100 mL). The fecal contamination of the groundwater was of human (22%, 55/250), ruminant (11%, 28/250), and pig (3%, 8/250) origin. Deep tube wells were less likely to be positive for E. coli and fecal markers compared to shallow dug wells. The human fecal marker was more likely to be detected in sources from built-up as compared to agricultural areas (Adjusted odds ratio (AOR) = 3.60, p = 0.002). Likewise, the ruminant fecal marker was more likely to be detected in sources from agricultural as compared to built-up areas (AOR = 2.90, p = 0.018). These findings suggest the preparation of mitigation strategies for controlling fecal pollution based on land cover and well types.

show abstract

“…Land use practices have direct and indirect impacts on water resources and water quality . For example, irrigation directly influences water supply through water withdrawal, and urbanization and agriculture can substantially degrade water quality, contributing to eutrophication and fecal contamination. − In addition, urbanization increases the demand for groundwater because it is a major drinking water resource in some urban areas. , Groundwater is a primary drinking water source in many regions of the world, and plays a central role in sustaining ecosystem and public health, especially in areas with contaminated or limited drinking water resources. , …”

Section: Introductionmentioning

confidence: 99%

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

Yunus

Islam

et al. 2016

Environ. Sci. Technol.

View full text Add to dashboard Cite

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 1.38 (95% CI = 1.16, 1.65), 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.

show abstract

Fecal contamination in Yongin watershed: association to land use and land cover and stormwater quality

Cited by 10 publications

References 14 publications

What Environmental Factors Influence the Concentration of Fecal Indicator Bacteria in Groundwater? Insights from Explanatory Modeling in Uganda and Bangladesh

What Environmental Factors Influence the Concentration of Fecal Indicator Bacteria in Groundwater? Insights from Explanatory Modeling in Uganda and Bangladesh

Identification of Human and Animal Fecal Contamination in Drinking Water Sources in the Kathmandu Valley, Nepal, Using Host-Associated Bacteroidales Quantitative PCR Assays

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

Contact Info

Product

Resources

About