scholarly journals Seasonal Variation of Arsenic Concentration in Ground Water of Nawalparasi District of Nepal

2014 ◽  
Vol 2 (1) ◽  
pp. 59-63 ◽  
Author(s):  
Rajib Kumar Shrestha ◽  
Dipak Regmi ◽  
Bhim P. Kafle
Keyword(s):  
Ground Water ◽  
Water Samples ◽  
Monsoon Season ◽  
Arsenic Concentration ◽  
Hydride Generation ◽  
Arsenic Contamination ◽  
Post Monsoon ◽  
Groundwater Samples ◽  
Post Monsoon Season ◽  
Very High

Ground water of southern part of Nepal, also known as Terai region where population density is relatively very high, has been contaminated with poisonous element Arsenic. This study has been carried out to determine variability of the level of arsenic contamination in groundwater with seasons of Pathkhauli village of Devgaun VDC and Mahuwa village of Manari VDC in Nawalparasi district, the western Terai district. Hydride Generation Atomic Absorption Spectrophotometer (HG-AAS) and UV-visible Spectrophotometry was used for analysis. Total 55 groundwater samples in post-monsoon season and 45 groundwater samples in pre-monsoon season were collected. The level of arsenic contamination in groundwater was found above the Nepal interim standard of 50 ppb. Of the total 42 water samples from each pre- and post- monsoon seasons analyzed, 28 water samples (67.67%) showed higher As-concentration in pre-monsoon season. DOI: http://dx.doi.org/10.3126/ijasbt.v2i1.9477   Int J Appl Sci Biotechnol, Vol 2(1): 59-63 

scholarly journals Application of Water Quality Index (WQI) For Ground Water Quality Interpretation

2019 ◽  
Vol 8 (12) ◽  
pp. 1862-1866
Keyword(s):  
Water Quality ◽  
Ground Water ◽  
Water Samples ◽  
Water Quality Index ◽  
Quality Index ◽  
Monsoon Season ◽  
Post Monsoon ◽  
Post Monsoon Season ◽  
Almost All ◽  
Physical And Chemical

Water Quality Index (WQI) is a widely used technique in defining the quality of groundwater and finding whether it is advisable for human use. It is utmost necessary steps to understand the physical and chemical parameters defining the water quality for particular period and location using WQI calculation as it gives information in a single value. WQI has been calculated in twenty ground water samples collected from selected sampling stations at Madurai in the pre-monsoon, monsoon and post monsoon seasons. The water quality index values suggested that almost all the ground water samples were above 150, which indicated that they were unfit for drinking and one sample from Vilangudi had WQI less than 100 which indicated the water as poor category for drinking but could be used for irrigation purposes. The groundwater quality is also defined to be little better during post monsoon season in all the samples than during pre-monsoon and monsoon season.

scholarly journals Quality Status of Irrigation Water of Kaleshwaram Project Command Area of Nizamabad District in Telangana State

2020 ◽  
pp. 34-42
Author(s):  
V. Prasad ◽  
T. Anjaiah ◽  
K. Pavanchandrareddy ◽  
P. Laxminarayana ◽  
T. L. Neelima
Keyword(s):  
Ground Water ◽  
Water Samples ◽  
Monsoon Season ◽  
Quality Parameters ◽  
Command Area ◽  
Post Monsoon ◽  
Post Monsoon Season ◽  
Telangana State ◽  
Positive Significant Correlation

The present study represents the quality of ground water from Kaleshwaram project command area of Nizamabad district of Telangana state, India during year 2019-2020. Total 72 ground water samples from bore wells were collected randomly from Nizamabad periodically in two seasons i.e. pre-monsoon season (May, 2019) and post-monsoon-season (January, 2020). The ground water samples were analyzed for quality parameters viz., pH, EC, cations, anions, boron. The Sodium Adsorption Ratio and Residual Sodium Carbonate were also calculated for these ground water samples. The results found that all ground water samples from Nizamabad district were neutral to alkaline in reaction and having pH 7.02 during pre-monsoon and 7.48 during post-monsoon season respectively. EC of these water were 1.23dSm-1 and 1.53dS m-1 during pre-monsoon and post-monsoon seasons respectively. Among 72 water samples as per salinity classification 2.8, 23.61, 69.44 and 4.17 per cent water samples during pre-monsoon and 0, 1.4, 90.30 and 8.33 per cent water samples during post-monsoon  were categorized in class C1, C2, C3 and C4, respectively. Among all the cations in ground water Calcium was dominant. Whereas anions CO3-2 + HCO3- are dominant. The boron concentration of ground water was ranged from 0.48 to 0.67 ppm during pre and post-monsoon, respectively. According to sodicity classes, i.e. SAR and RSC of ground waters were 100 and 47.22 per cent during pre-monsoon, 100 and 26.40 per cent during post-monsoon are suitable for irrigation. The positive significant correlation was observed between EC, cations of ground water.

scholarly journals Effect of COVID-19 Lockdown on Metal Concentration in the Water Column of Asia’s Largest Coastal Lagoon

2021 ◽  
Author(s):  
Syed Hilal Farooq ◽  
Amrit Kumar Mishra ◽  
Sandip Kumar Muhakud ◽  
Prasannajit Acharya ◽  
Pradipta Ranjan Muduli ◽  
...  
Keyword(s):  
Metal Concentration ◽  
Water Samples ◽  
Monsoon Season ◽  
Physical Parameters ◽  
Chilika Lagoon ◽  
Post Monsoon ◽  
Post Monsoon Season ◽  
The Mean ◽  
The Impact ◽  
Mean Concentration

A complete halt on all anthropogenic activities and human movement due to COVID-19 lockdown has provided a great opportunity to assess the impact of human activities on coastal marine ecosystems. The current study assessed the concentration of the metals in water samples of the largest brackish water lagoon of Asia; the Chilika lagoon in the state of Odisha, India between pre-COVID-19 and post-COVID-19 lockdown scenarios. Monthly water samples (n=30 stations) from 0.3 m depth were collected from three sectors of the lagoon seasonally; pre-monsoon, monsoon, and post-monsoon. In addition to various physical parameters [pH, salinity, alkalinity, (DO) dissolved oxygen, (TDS) total dissolved solids, and (EC) electrical conductivity] the collected water samples were analysed for 18 trace metals (Al, As, Ba, Be, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb, Sr, Th, Tl, U, V). Most of the physical parameters showed a significant variation between pre-and post-COVID-19 scenarios, except for pH and DO. The concentration of five metals (Be, Cd, Co, Ni, and Pb) remained below detection limits in all water samples. The impact of COVID-19 lockdown on the concentration of the metal in the water samples was noticed along with the three sectors of the lagoon. However, eight metals (Al, As, Cr, Fe, Mn, Th, U, and V) were significantly different between the COVID-19 scenarios and the remaining five metals were not statistically significant. The mean concentration of Al, As, Fe, Th, and V were higher in the pre-COVID-19 scenarios, whereas only Cr and Mn were higher in the post-COVID-19 scenarios. The mean concentration of U was similar among both COVID-19 scenarios, even though there were seasonal and sectoral differences. The seasonal influence of riverine influx was more evident on metal concentration during the monsoon season, whereas the difference between sectors was more prominent during the post-monsoon season. An increased number of correlations between physical parameters and metal concentration were observed in the post-monsoon season and post-COVID-19 scenario. This study provides evidence that the imposition of COVID-19 lockdown reduced metal influx in the water column and improved the water quality of the Chilika lagoon. Our results can be used as baseline for metal concentration in surface waters of the lagoon.

scholarly journals Fluoride Contamination Studies in Belchampa Pratappur Villages of Garhwa District Jharkhand

2020 ◽  
pp. 246-253
Keyword(s):  
Monsoon Season ◽  
Fluoride Concentration ◽  
Fluoride Contamination ◽  
Post Monsoon ◽  
Dental And Skeletal Fluorosis ◽  
Groundwater Samples ◽  
Tube Wells ◽  
Post Monsoon Season ◽  
Total Dissolved Solid ◽  
Admissible Limit

Belchampa-Pratappur villages about 8 Kms towards East from district head-quarter Garhwa has been undertaken to study the groundwater quality, especially fluoride contamination. These places are situated on the border of the Garhwa and Palamu district. Bishrampur is the prominent place lying to about 11 km east of area under consideration. The area is underlain mostly by granite and gneisses. Fluoride containing minerals as indeed Fluorite, apatite, different amphiboles and micas occur in association with these rocks. 18 Groundwater samples during Pre-and Post-monsoon have been collected from tube wells and analyzed for major cation ( Ca+2,Mg+2,Na+,K+) and anion(HCO3-, Cl-,SO42-,F-) in addition to fluoride. Fluoride concentration as high as 5 mg/l has been found in many samplesof groundwater in the area, which is above the admissible limit of 1.5 mg/l (WHO). The inhabitants of these two villages belong to very poor economic background and of diverse communities. Many people of these villages are fluoride affected. Dental and Skeletal fluorosis is common in the area, which is very alarming. The total dissolved solid (T.D.S.) is also found to be much higher, at many places. It ranges from 586 mg/l to 408 mg/l in pre-monsoon and 736 mg/l to 194 mg/l in post monsoon season respectively. Consequently the electrical conductivity is also much higher at several places which ranges from 915 micro mhos/cm to 637 micro mhos/cm at 250C in pre-monsoon and 1150 micro mhos/cm to 303 micro mhos/cm in post-monsoon season respectively.

Analysis of Ground Water Quality Using Statistical Techniques

2020 ◽  
pp. 152-161
Author(s):  
Keerthy K. ◽  
Sheik Abdullah A. ◽  
Chandran S.
Keyword(s):  
Water Quality ◽  
Ground Water ◽  
Monsoon Season ◽  
Chemical Characterization ◽  
Statistical Techniques ◽  
Ground Water Quality ◽  
Physico Chemical ◽  
Groundwater Samples ◽  
Post Monsoon Season ◽  
Dug Wells

Urbanization, industrialization, and increase in population lead to depletion of ground water quantity and also deteriorate the ground water quality. Madurai city is one of the oldest cities in India. In this chapter the ground water quality was assessed using various statistical techniques. Groundwater samples were collected from 11 bore wells and 5 dug wells in Post-monsoon season during 2002. Samples were analysed for physico-chemical characterization in the laboratory. Around 17 physico-chemical parameters were analysed for all the samples. The descriptive statistical analysis was done to understand the correlation between each parameter. Cluster Analysis was carried out to identify the most affected bore well and dug well in the Madurai city.

Evaluation of groundwater quality and its suitability for drinking purpose in Rajshahi City, Bangladesh

2011 ◽  
Vol 11 (5) ◽  
pp. 545-559
Author(s):  
S. M. Helal Uddin ◽  
M. G. Mostafa ◽  
A. B. M. H. Haque
Keyword(s):  
Drinking Water ◽  
Groundwater Quality ◽  
Water Samples ◽  
Monsoon Season ◽  
Water Type ◽  
Post Monsoon ◽  
Drinking Water Standard ◽  
Drinking Purposes ◽  
Post Monsoon Season ◽  
Rajshahi City

A study was conducted to evaluate the hydrochemical processes controlling the water quality variations and to determine the water type of groundwater in Rajshahi City, Bangladesh, for drinking purposes. A total of 120 shallow and deep tubewell water samples were collected in pre- and post-monsoon seasons during the year 2008–2009 and analyzed for various physico-chemical parameters. The results of the analyses show that water samples were slightly alkaline to neutral pH. The average concentrations of Pb in all samples for the post-monsoon season were above the WHO's guideline for drinking water. For both seasons, arsenic levels exceeded the drinking water standard in 25% of groundwater samples and lead (Pb) levels exceeded in about 60% samples which contained elevated levels (>0.01 mg/L). The major cationic and anionic orders of dominance were unusual, being Ca2+ > Mg2+ > Na+ > K2 > Fe3+ > Pb2+ > Zn2+ > Cu2+ > As (total) > Cd2+ and HCO3− > Cl−> SO42− > NO3−, respectively. The study reveals that the water type of the groundwater was calcium bicarbonate (Ca-HCO3). Thus overall results suggest that groundwater quality of the study area was not suitable for drinking purposes without treatment especially for Pb and As.

scholarly journals Hydrogeochemical characterisation and appraisal of groundwater suitability for domestic and irrigational purposes in a semi-arid region, Karnataka state, India

2020 ◽  
Vol 10 (12) ◽  
Author(s):  
M. A. Mohammed-Aslam ◽  
Syed Shams Rizvi
Keyword(s):  
Monsoon Season ◽  
Sodium Content ◽  
Water Type ◽  
Post Monsoon ◽  
Salinity Hazard ◽  
Low Sodium ◽  
Groundwater Samples ◽  
Karnataka State ◽  
Post Monsoon Season ◽  
Semi Arid Region

AbstractHydrogeochemical investigations have been carried out in a semi-arid region of Aland taluk of Karnataka State, India. The analysis has been done to examine the quality of groundwater for drinking, domestic and irrigational purposes. In this concern, thirty-two groundwater samples were collected in pre-monsoon (April 2016) and post-monsoon season (November 2016), from the different location within the study area. These samples have been further analysed for different ions such as CO32−, HCO3−, NO3−, Ca2+, Mg2+, Na+, K+ Fe2+, SO42−, Clˉ and F− to evaluate the hydrochemical behaviour with SSP (sodium soluble percentage), SAR (sodium absorption ratio), % Na (percentage sodium), RSC (residual sodium carbonate), KR (Kelly’s ratio), PI (permeability index) and MH (magnesium hazards). These positive and negative ions have been further correlated with the maximum annual rainfall within the study area to find out the variations between these ions for the precipitation. Suitability of groundwater for drinking purposes around the catchment was not suitable except in a few places. Irrigational suitability of groundwater showed that the water is within the limit for irrigation except in a few locations. Wilcox diagram depicts that 90% of the pre-monsoon samples and 65% of the post-monsoon samples fell into excellent to good category zone. US salinity diagram explains that 71% of pre-monsoon samples belong to medium-salinity-hazard to low-sodium-content zones, whereas 50% of post-monsoon samples fall into high-salinity-hazard to low-sodium-content zone. Gibbs’s plot showed that the water–rock processes control the geochemistry of the Aland region in both monsoon seasons. Chadha’s diagram depicts that 56.25% of the groundwater samples fall under the subfield of Ca2+–Mg2+–Cl− water type with permanent hardness during pre-monsoon season, whereas 50% of groundwater samples falls under the subfield of Ca2+–Mg2+–HCO3− water type with temporary hardness during post-monsoon season.

scholarly journals A hydrogeochemical approach to evaluate groundwater quality in the vicinity of three tributaries of the Beas River, North-West India

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Jasdeep Singh ◽  
Simerpreet Kaur Sehgal ◽  
Kuldip Singh ◽  
Didar Singh
Keyword(s):  
Monsoon Season ◽  
Average Concentration ◽  
North West ◽  
Post Monsoon ◽  
Major Cations ◽  
Multiple Comparison Test ◽  
Physico Chemical ◽  
Groundwater Samples ◽  
Post Monsoon Season ◽  
Ussl Diagram

AbstractThe present study focused on the seasonal investigation of hydro-geochemical characteristics of groundwater samples collected from the vicinity of three tributaries of the Beas River, Punjab, India. Total 45 samples were analyzed during the pre- and post-monsoon season for physico-chemical parameters and heavy metals along with health risk assessment. Results revealed that the majority of samples were below the permissible limits set by the BIS and WHO. The relative abundance of major cations was Ca2+ > Mg2+ > Na+ > K+ and Ca2+ > Na+ > Mg2+ > K+, while that of the major anions was HCO3− > SO42− > Cl− > CO32− in the pre- and post-monsoon season, respectively. Groundwater was alkaline and hard in nature at most of the sites. Bicarbonate content exceeded the desirable limit having an average concentration of 337.26 mg/L and 391.48 mg/L, respectively, during the pre- and post-monsoon season. Tukey’s multiple comparison test was applied for finding significant differences among samples at p < 0.05. The dominant hydrochemical face of water was Ca–Mg–HCO3 type. US salinity (USSL) diagram indicated that during the pre-monsoon, 48.9% samples were C2S1 type and remaining 51.1% were C3S1 type while during the post-monsoon all samples were C3S1 type. It indicates that groundwater of the study area is at risk of salinity hazards in future and is not to be ignored. Such monitoring studies are recommended to design future safety plans to combat soil and human health risks.

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