scholarly journals Assessment of Salinity and Fluoride in Groundwater of Semi-Arid Region of Punjab, India

2017 ◽  
Vol 12 (1) ◽  
pp. 34-41 ◽  
Author(s):  
Gopal Krishan ◽  
M. S Rao ◽  
C. P Kumar ◽  
Sudhir Kumar ◽  
R. S Loyal ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Drinking Water ◽  
Human Health ◽  
Arid Region ◽  
Permissible Limit ◽  
Groundwater Levels ◽  
Groundwater Samples ◽  
Semi Arid Region ◽  
Semi Arid ◽  
Who 2008

Groundwater is the major source of drinking water in Southwestern semi-arid region of Punjab, India which is now facing severe salinity and fluoride (F-) problems. A study was carried out in the Bathinda district of southwest semi-arid region of Punjab to assess the salinity and F- concentrations. Groundwater samples from 21 locations were analyzed, and 59% were found to exceed the permissible electrical conductivity (EC) limit of 1500 µS/cm1. Fluoride concentrations exceeded the WHO (2008)1 permissible limit of 1.50 mg/L in 69% of the samples which may significantly affect human health by causing fluorosis. The increase in groundwater levels leading to high evaporation which caused an accumulation of salts and further resulted in increase in EC. The increased F- concentration is mainly due to rock-water interactions which led to fluorite dissolution.

Environmental factors associated with toxic cyanobacterial blooms across 20 drinking water reservoirs in a semi-arid region of Brazil

Harmful Algae ◽  
2019 ◽  
Vol 86 ◽  
pp. 128-137 ◽  
Author(s):  
Mário U.G. Barros ◽  
Alan E. Wilson ◽  
João I.R. Leitão ◽  
Silvano P. Pereira ◽  
Riley P. Buley ◽  
...  
Keyword(s):  
Drinking Water ◽  
Environmental Factors ◽  
Arid Region ◽  
Cyanobacterial Blooms ◽  
Water Reservoirs ◽  
Factors Associated ◽  
Semi Arid Region ◽  
Semi Arid

scholarly journals Diversity and structure of microcrustacean assemblages (Cladocera and Copepoda) and limnological variability in perennial and intermittent pools in a semi-arid region, Bahia, Brazil

2011 ◽  
Vol 101 (4) ◽  
pp. 317-324 ◽  
Author(s):  
Nadson R. Simões ◽  
Sylvia M. M. S. Ribeiro ◽  
Sérgio L. Sonoda
Keyword(s):  
Electrical Conductivity ◽  
Arid Region ◽  
Suspended Solids ◽  
Diversity Index ◽  
Total Alkalinity ◽  
Water Volume ◽  
Aquatic Environments ◽  
Physical Factors ◽  
Semi Arid Region ◽  
Semi Arid

Temporary wetlands undergo recurrent drought due to the scarcity of water, which disrupts the hydrological connectivity with adjacent aquatic systems. However, some environments retain water for longer periods, allowing greater persistence of the community. The current study evaluated differences in the microcrustacean assemblages and limnological variability between perennial and intermittent pools in a semi-arid region of Brazil. The abiotic features (water temperature, pH, total alkalinity, electrical conductivity and depth) of intermittent pools were affected more than perennial pools due to loss of water volume. This may have contributed to a higher average richness and diversity index in some intermittent pools and differences in the structure of the assemblages. The lowest species richness and diversity were recorded where physical factors, such as a large quantity of suspended solids and variability in the electrical conductivity of the water and pH, make the environment unsuitable for these organisms. These results suggest that community development in intermittent pools is interrupted by the dry season; when the water returns, due to rainfall or rising groundwater, each pond undergoes a different process of colonization. In these circumstances, the biological importance of temporary aquatic environments is clear, since such pools provide shelters and have an important role in the maintenance of the regional diversity of aquatic environments.

Identifying influencing groundwater parameter on human health associate with irrigation indices using the Automatic Linear Model (ALM) in a semi-arid region in India

2021 ◽  
pp. 111778
Author(s):  
Balamurugan Panneerselvam ◽  
Kirubakaran Muniraj ◽  
Maciej Thomas ◽  
Nagavinothini Ravichandran ◽  
Butsawan Bidorn
Keyword(s):  
Human Health ◽  
Linear Model ◽  
Arid Region ◽  
Semi Arid Region ◽  
Semi Arid

scholarly journals Bioavailable Organochlorine Pesticides in a Semi-Arid Region of Eastern Oregon, USA, as Determined by Gas Chromatography with Electron-Capture Detection

2001 ◽  
Vol 84 (5) ◽  
pp. 1371-1382 ◽  
Author(s):  
Kim A Anderson ◽  
Eugene Johnson
Keyword(s):  
Health Risk ◽  
Human Health ◽  
Environmental Protection Agency ◽  
Arid Region ◽  
Human Health Risk ◽  
Electron Capture Detection ◽  
Water Quality Criteria ◽  
Daily Consumption ◽  
Semi Arid Region ◽  
Semi Arid

Abstract A group of dissolved-bioavailable organochlorine (OC) pesticides and inorganic anions in water and total OC pesticides in sediments were measured in the Malheur Watershed, a semi-arid region in the western United States, over a 2-year period. OC pesticide levels were compared with those from a 1990 study of the lower section of the river, the most recent data available. After calculating the dissolved fraction from the 1990, study it seems that DDD and dieldrin levels have decreased in the water by 50–70%, while DDE and DDT have changed little. Although banned nearly 30 years ago, DDT is still persistent throughout the Malheur River basin/watershed because it was found in all water samples tested. All of the OC pesticides tested during the 2-year study are well below the criterion continuous concentration for aquatic community exposure as defined by the U.S. Environmental Protection Agency (EPA). OC pesticides appear to be decreasing, however, at lower Ontario there remains a human health risk (EPA Human Health Risk Water Quality Criteria) for DDT, because this criteria includes daily consumption of water and fish from the river. Overall, although the upper forest watershed sites have lower OC pesticide concentrations, they represent an important contribution to the total DDT load to this watershed, a source not previously acknowledged. The large increase in DDT and ΣDDT between the Ontario sites may indicate a possible historical point source of contamination or historical preferential deposition of contamination. Normalized sediment (ΣDDT/organic carbon) strongly correlates with dissolved water ΣDDT.

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