scholarly journals Hydrochemical characteristics, hydraulic connectivity and water quality assessment of multilayer aquifers in Western Suzhou City, Northern Anhui Province, China

2021 ◽  
Author(s):  
Jie Ma ◽  
Song Chen ◽  
Songbao Feng ◽  
Diandian Ding
Keyword(s):  
Water Quality ◽  
Ion Exchange ◽  
Groundwater Resources ◽  
Water Quality Assessment ◽  
Unconfined Aquifer ◽  
Shallow Aquifer ◽  
Sodium Absorption ◽  
Confined Aquifer ◽  
Hydrochemical Characteristics ◽  
Reverse Ion Exchange

Abstract The present study focuses on the shallow phreatic aquifer (SA) and the upper confined aquifer (CA) developed in Cenozoic loose strata, which are the major regional groundwater resources for drinking, irrigation, industry and other water-related activities. Seven samples from SA and seventeen samples from CA were analyzed to depict the hydrochemical characteristics, categorize the hydrochemical facies, evaluate the hydraulic connectivity, and appraise the drinking water and irrigation water quality. The abundance of cations is Na+ > Ca2+ > Mg2+ > K+ and the anions is HCO3− > SO42− > Cl− in both aquifers, respectively. Groundwater chemistry is controlled by water-rock interactions such as halite dissolution, ion exchange, reverse ion exchange, silicate weathering, and followed by the dissolution of Glauber's salt. The low connectivity and moderate connectivity between these two aquifers has engendered. The majority of the ion concentrations are within the limit for drinking, only one sample from the shallow aquifer are greater than the limit of 250 mg/L, a total of 29% from the shallow unconfined aquifer and 14% from the confined aquifer were not within the limit of 250 mg/L. The sodium absorption ratio (SAR), residual sodium carbonate (RSC) and soluble sodium percentage (%Na) values reveal that all the samples are appropriate for irrigation uses. The the US salinity laboratory (USSL) diagram shows that sixteen CA samples and all the SA samples fall in the C3S1 zone, implying high salinity hazard and low alkalinity hazard.

scholarly journals Geospatial Approach for Assessment of Groundwater Quality

2021 ◽  
Author(s):  
Arvind Chandra Gauns ◽  
M. Nagarajan ◽  
R. Lalitha ◽  
M. Baskar
Keyword(s):  
Water Quality ◽  
Groundwater Quality ◽  
Tamil Nadu ◽  
Groundwater Resources ◽  
Salt Content ◽  
Water Quality Assessment ◽  
Entire Study ◽  
Different Seasons ◽  
Kelly’S Ratio ◽  
Ussl Diagram

Abstract Increasing population, erratic distribution of rainfall, and their rising demand for water in domestic and irrigation is fulfilled by groundwater resources. Due to overexploitation, there is the deterioration of groundwater quality and hence to evaluate the groundwater quality, a study was undertaken to understand the water suitability for drinking as well as for irrigation purposes. For this study, five villages namely Kumulur, Tachankurunchi, Pudurutamanur, Pandaravadai, and Poovalur were selected from Trichy District, Tamil Nadu, India with an areal extent of 45.1 km2. For the water quality assessment, samples were drawn from 53 locations from the sources like open well, bore well and hand pumps, etc., Parameters of pH, EC, TDS, Anions - CO3 2−, HCO3−, Cl−, SO4 2−, Cations - Ca2+, Mg2+, B3+, Na+ and potassium (K+) were estimated using the standard analytical procedure in three different seasons Viz., S-I (September 2019), S-II (December 2019) and S-III (March 2020). The WQI was computed for drinking water quality and it was found that 25% samples in S-I, 80% samples in S-II, and 83% samples in S-III were above the permissible limit for drinking purposes. Indices like Sodium Percentage, Sodium Adsorption Ratio, Permeability Index, Kelly’s Ratio, Magnesium Hazard Ratio, Potential Salinity, USSL Diagram, Wilcox Plot, Piper Diagram, and Gibbs plot were evaluated for examining irrigation water quality. The results revealed that 90% of the area, the water is suitable for irrigation purposes and a few locations (10%) wherein the salt content of water are relatively higher than the entire study area.

Hydrochemical Characteristics and Water Quality Assessment of Groundwater in Daxing District of Beijing, China

2013 ◽  
Vol 295-298 ◽  
pp. 696-700
Author(s):  
Mu Zi Li ◽  
Yuan Zheng Zhai ◽  
Jun Zhou ◽  
Jin Sheng Wang
Keyword(s):  
Water Quality ◽  
Groundwater Quality ◽  
Seasonal Changes ◽  
Water Quality Assessment ◽  
Assessment Method ◽  
Hydrochemical Characteristics ◽  
Natural Factors ◽  
Groundwater Environment ◽  
Groundwater Samples ◽  
Beijing China

Based on the groundwater samples collected in Daxing District of Beijing in June and October 2008, the groundwater quality is assessed and the groundwater hydrochemical characteristics are analyzed. The assessment of groundwater quality is conducted by using the F-value comprehensive assessment method, and GIS approach is used to obtain the zonation of groundwater quality. The results show that the groundwater quality is classified into II, III and IV class, and the groundwater quality gradually changes well from north to south. The groundwater of IV class is located in the northern part, which accounts for about 40% of the total area, and the major pollution factors are TDS and nitrate. The groundwater is mainly characterized by HCO3-Ca•Mg type. The concentrations of SO42-, NO3-, Ca2+ and TDS follow a decreasing trend generally from north to south, all of which have slight seasonal changes. Both natural factors and human activities have impacts on the chemical composition of the groundwater. The protection of groundwater environment in northern Daxing should be taken more seriously.

scholarly journals Determining groundwater facies and water quality index in Tanah Bumbu Regency/South Borneo Indonesia

2020 ◽  
Vol 202 ◽  
pp. 04007
Author(s):  
Thomas Triadi Putranto ◽  
Rahmad S. Ginting
Keyword(s):  
Water Quality ◽  
Groundwater Quality ◽  
Water Quality Index ◽  
Quality Index ◽  
Unconfined Aquifer ◽  
Poor Quality ◽  
Confined Aquifer ◽  
Groundwater Samples ◽  
Dug Wells ◽  
Calcium Magnesium

Most people in Tanah Bumbu Regency use water from dug wells for their daily activities. Kotabaru Regency is located in Pagatan Groundwater Basin, which is located in three administrative boundaries, namely Tanah Laut Regency, Tanah Bumbu Regency, The purposes of this study are to determine the type of groundwater facies and Water Quality Index (WQI). The methods were hydrogeological mapping and hydrogeochemical analysis of groundwater samples to evaluate groundwater quality. There were 170 groundwater samples mapped in the study area. The study area has differences in groundwater quality in both confined aquifer and unconfined aquifer. The unconfined aquifer has two types of groundwater facies, namely Ca-Mg-HCO3 (Calcium Magnesium Bicarbonate) and Ca-Cl (Calcium Chloride). In comparison, the confined aquifer has two types, which are Ca-Mg-HCO3- (Calcium Magnesium Bicarbonate) and Na-HCO3- (Sodium Bicarbonate). Based on the calculation of the Water Quality Index (WQI) of unconfined aquifer samples show that 70% of groundwater samples have poor quality. Meanwhile, the confined aquifer samples indicate that 85% of groundwater samples have good to excellent, which is suitable for drinking water.

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