Your search found 4 records
1 Sharma, P.; Meher, P. K.; Kumar, A.; Gautam, Y. P.; Mishra, K. P. 2014. Changes in water quality index of Ganges River at different locations in Allahabad. Sustainability of Water Quality and Ecology, 3-4:67-76. (Special issue: Towards Sustainability Assessment of Water Systems: Current Approaches and Future Challenges). [doi: https://doi.org/10.1016/j.swaqe.2014.10.002]
Water quality ; Drinking water ; Water pollution ; Rivers ; Chemicophysical properties ; pH ; Electrical conductivity ; Dissolved oxygen ; Total dissolved solids ; Temperature ; Alkalinity ; Ions ; Cations ; Anions ; Measurement ; Monsoon climate / India / Allahabad / Ganges River / Yamuna River
(Location: IWMI HQ Call no: e-copy only Record No: H047958)
(1.10 MB)
We have determined the water quality index (WQI) of post-monsoon water samples with an aim to assess changes in Ganges river at various locations in Allahabad stretch including that from the confluence with river Yamuna. Physicochemical parameters such as temperature, pH, electrical conductivity (EC), dissolved oxygen (DO), total dissolved solids (TDS), major cations e.g. Na+ , K+ , Mg2+, Ca2+, major anions e.g. F, Cl, Br, SO4 2, NO3 , PO4 2 and alkalinity were analyzed by standard procedures. The values obtained were compared with the guideline values for drinking water by Bureau of Indian Standard (BIS) and World Health Organization (WHO). From the measured quantities, certain parameters were selected to derive WQI for the variations in water quality of each designated sampling site. Results showed considerable deterioration in quality of water at some of the sites. WQI of Ganges river water at Allahabad ranged from 86.20 to 157.69 which falls in the range of poor quality of water. Pearson’s correlation matrix was drawn to find possible interrelations among measured water quality parameters. It is shown that WQI may be a useful tool for assessing water quality and predicting trend of variation in water quality at different locations in the Ganges river.
2 Alam, M. Z.; Carpenter-Boggs, L.; Rahman, A.; Haque, M. M.; Miah, M. R. U.; Moniruzzaman, M.; Qayum, M. A.; Abdullah, H. M. 2017. Water quality and resident perceptions of declining ecosystem services at Shitalakka wetland in Narayanganj city. Sustainability of Water Quality and Ecology, 9-10:53-66. [doi: https://doi.org/10.1016/j.swaqe.2017.03.002]
Water quality ; Ecosystem services ; Households ; Attitudes ; Wetlands ; Chemicophysical properties ; Heavy metals ; Cations ; Anions ; Environmental effects ; Regulations ; Urban areas / Bangladesh / Narayanganj / Shitalakka Wetland
(Location: IWMI HQ Call no: e-copy only Record No: H048486)
(2.36 MB)
Wetland ecosystem services provide social benefits. These services are vulnerable due to human activities. The present research concerns perceptions of declining wetland ecosystem services and their effects on water quality parameters. The percentages of provisioning, regulating, cultural and supporting services were found to overshadow ecosystem services, such that generation of goods and values in the studied wetlands are in jeopardy. Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD), turbidity, conductivity, Total Dissolved Solids (TDS), Dissolved Oxygen (DO), heavy metals and salts were measured as indicators of water quality. Many significant correlations were observed and many of these parameters exceeded regulatory limits. Lead (Pb) in wetland 0.09 mg/L far exceeded the safe limit (0.01–0.05 mg/L), while turbidity in wetland 21.12 was too high to sustain fish. Wetland water pH was significantly correlated (p 0.01) with Cd. TDS was found to have a significant (p 0.01; p 0.05; p 0.1) correlation with conductivity, Ca2+, BOD, and DO. The conductivity increased (p 0.01) with increasing Ca2+ concentrations. COD was significantly different (p 0.1) with Pb, Cd and Cl. BOD increased with increasing Ca2+ concentrations (p 0.05). Continuous monitoring of water quality indicators (turbidity, EC, pH, DO, TDS, COD, BOD, cations, and anions) is crucial for improving of wetland ecosystem services and sustainability of communities.
3 Imbulana, S; Oguma, K. 2021. Groundwater as a potential cause of chronic kidney disease of unknown etiology (CKDu) in Sri Lanka: a review. Journal of Water and Health, 19(3):393-410. [doi: https://doi.org/10.2166/wh.2021.079]
Kidney diseases ; Chronic course ; Aetiology ; Groundwater ; Risk factors ; Drinking water ; Water quality ; Fluorides ; Heavy metals ; Cadmium ; Water hardness ; Cations ; Wells ; Agrochemicals ; Organic matter ; Arid zones ; Communities / Sri Lanka
(Location: IWMI HQ Call no: e-copy only Record No: H050453)
https://iwaponline.com/jwh/article-pdf/19/3/393/902741/jwh0190393.pdf
https://vlibrary.iwmi.org/pdf/H050453.pdf
https://vlibrary.iwmi.org/pdf/H050453.pdf
(0.39 MB) (396 KB)
The cause of Chronic Kidney Disease of unknown etiology (CKDu) in the rural dry zone of Sri Lanka remains unidentified, despite vast research efforts that brought about an extensive list of potential risk factors. Among these, the long-term exposure to various nephrotoxic elements through drinking groundwater was widely suspected owing to the unique geographical distribution of the disease. This review focuses on such well-known hypotheses suspecting the relations with fluoride, hardness, major ions, heavy metals, metalloids, organic matter, agrochemical residues, pathogens, and bacterial toxins in the groundwaters of the CKDu-endemic region. It was comprehensively discussed why each of these constituents was considered a risk factor of CKDu, how could they possibly trigger the pathogenesis of the disease, what was the evidence that supported or failed each hypothesis, and whether providing safe drinking water had been effective at mitigating the progression of the disease. Although plenty of circumstantial evidence supported an etiology related to groundwater for CKDu, it was impossible to elucidate the cause–effect relationships between drinking impaired groundwater and the occurrence of the disease. Future research should be effectively designed to clarify the role of groundwater in the onset of CKDu by taking into account the gaps in past research.
4 Bilal, H.; Li, X.; Iqbal, Muhammad Shahid; Mu, Y.; Tulcan, R. X. S.; Ghufran, M. A. 2023. Surface water quality, public health, and ecological risks in Bangladesh—a systematic review and meta-analysis over the last two decades. Environmental Science and Pollution Research, 30(40):91710-91728. [doi: https://doi.org/10.1007/s11356-023-28879-x]
Surface water ; Water quality ; Public health ; Risk assessment ; Health hazards ; Water pollution ; Ecological factors ; Physicochemical properties ; Hydrochemistry ; Cations ; Anions ; Heavy metals ; Arsenic ; Cadmium ; Chromium ; Mercury ; Lead ; Biological contamination ; Faecal coliforms ; Cryptosporidium ; Drinking water ; Rivers ; Water management ; Water policies / Bangladesh
(Location: IWMI HQ Call no: e-copy only Record No: H052106)
(2.75 MB)
Water quality has recently emerged as one of the utmost severe ecological problems being faced by the developing countries all over the world, and Bangladesh is no exception. Both surface and groundwater sources contain different contaminants, which lead to numerous deaths due to water-borne diseases, particularly among children. This study presents one of the most comprehensive reviews on the current status of water quality in Bangladesh with a special emphasis on both conventional pollutants and emerging contaminants. Data show that urban rivers in Bangladesh are in a critical condition, especially Korotoa, Teesta, Rupsha, Pashur, and Padma. The Buriganga River and few locations in the Turag, Balu, Sitalakhya, and Karnaphuli rivers have dissolvable oxygen (DO) levels of almost zero. Many waterways contain traces of NO3, NO2, and PO4-3 pollutants. The majority of the rivers in Bangladesh also have Zn, Cu, Fe, Pb, Cd, Ni, Mn, As, and Cr concentrations that exceed the WHO permissible limits for safe drinking water, while their metal concentrations exceed the safety threshold for irrigation. Mercury poses the greatest hazard with 90.91% of the samples falling into the highest risk category. Mercury is followed by zinc 57.53% and copper 29.16% in terms of the dangers they pose to public health and the ecosystem. Results show that a considerable percentage of the population is at risk, being exposed to contaminated water. Despite hundreds of cryptosporidiosis cases reported, fecal contamination, i.e., Cryptosporidium, is totally ignored and need serious considerations to be regularly monitored in source water.
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