scholarly journals Hydrochemical Characteristics and Groundwater Quality Assessment in the Diluvial Fan of Gaoqiao, Emei Mountain, China

2018 ◽  
Vol 10 (12) ◽  
pp. 4507 ◽  
Author(s):  
Yanna Yang ◽  
Wenlai Xu ◽  
Jinyao Chen ◽  
Qiang Chen ◽  
Zhicheng Pan
Keyword(s):  
Groundwater Quality ◽  
Human Activities ◽  
Pollution Prevention ◽  
Shallow Groundwater ◽  
Pollution Assessment ◽  
Total Hardness ◽  
Chemical Components ◽  
Hydrochemical Characteristics ◽  
Rock Interaction

Methods for groundwater quality and pollution assessment are applied extensively, but it is difficult to determine a unified evaluation model. On the basis of hydrogeochemical characteristics analysis in 2016 compared with that in 1995, the five-element connection number SPA (set pair analysis) method was applied to evaluate the groundwater quality of the Gaoqiao diluvial fan under the influence of hydrogeological conditions and human activities along the flow path in our work. Descriptive statistics methods, Piper diagram, and a Schoeller diagram were also used to analyze the hydrochemical characteristics of groundwater such as chemical components, total dissolved solid, and total hardness. The change of the typical pollutant of fluorine was analyzed to evaluate the groundwater quality under the influence of human activities. The results showed that the groundwater quality in the study area was more in rank П. The basic hydrochemical types of shallow groundwater were HCO3-Ca·Mg and HCO3·SO4-Ca·Mg. The influencing factors of the hydrochemical component of groundwater were identified in the Gaoqiao diluvial fan. The quality of groundwater changed slightly from the top to the edge of the fan due to the water–rock interaction except for in Yucun and Hucun influenced by human activities. The assessment result can provide a scientific basis for the pollution prevention and changing process control of the groundwater in the hydrogeological unit of the Gaoqiao diluvial fan.

Influences of natural and anthropogenic processes on the groundwater quality in the Dagujia River Basin in Yantai, China

2019 ◽  
Vol 69 (2) ◽  
pp. 184-196 ◽  
Author(s):  
Henghua Zhu ◽  
Jianwei Zhou ◽  
Tingting Song ◽  
Haibo Feng ◽  
Zhizheng Liu ◽  
...  
Keyword(s):  
Groundwater Quality ◽  
Seawater Intrusion ◽  
Human Activities ◽  
Industrial Development ◽  
Anthropogenic Activities ◽  
Total Hardness ◽  
Chemical Components ◽  
Chemical Compositions ◽  
Rock Interaction ◽  
Natural Processes

Abstract Groundwater plays an important role in water supply and economic development for Yantai city, China. However, the groundwater quality has degraded due to the increase and expansion of agricultural and industrial development. It is urgent to acquire groundwater characteristics and distinguish impacts of natural factors and anthropogenic activities on the groundwater quality. Forty-six groundwater samples collected from different wells showed a great variation of chemical components across the study area. Most wells with higher total dissolved solids, total hardness, K+, Na+, Ca2+, Mg2+, Cl− and SO42− concentrations were located relatively close to the coastal zone. The factor analysis (FA) and hierarchical cluster analysis results displayed that seawater intrusion was the primary mechanism controlling the groundwater quality in the coastal areas. A three-factor model was proposed based on the FA and explained over 85% of the total groundwater quality variation: Factor 1, the seawater intrusion; Factor 2, the water–rock interaction and Factor 3 (NO3−), the human activities. Furthermore, the geographical maps of the factor scores clearly described the spatial distributions of wells affected by natural processes or human activities. The study indicated that both natural processes and human activities are the major factors affecting the chemical compositions of groundwater.

Impact of Shallow Groundwater Quality Evolution in Kunming Urban by Human Activities

2013 ◽  
Vol 788 ◽  
pp. 302-306 ◽  
Author(s):  
Wan Qiu Yang ◽  
Liang Shen ◽  
Han Xiao ◽  
Ying Zhen Wang
Keyword(s):  
Groundwater Quality ◽  
Human Activities ◽  
Nitrogen Concentration ◽  
Pollution Prevention ◽  
Shallow Groundwater ◽  
Basic Mechanism ◽  
Scientific Basis ◽  
Ammonium Nitrogen ◽  
Chemical Components ◽  
Geological Conditions

Chemical components of the groundwater change with time and space due to the influence of environmental geological conditions and human activities, where the human activity is one of the main factors which cause the deterioration of groundwater quality. In this paper, the monitoring data of shallow groundwater in Kunming urban has been collected and analyzed. The results indicates that with the acceleration of the industrialization and urbanization process, the chemical characteristics of groundwater have been changed, such as the total dissolved solid (TDS) and nitrogen, including ammonium nitrogen, nitrite nitrogen, and nitrate nitrogen concentration increase gradually. TDS and ammonium nitrogen can be used as indicators that reflect the influence of human activities on the shallow groundwater quality in Kunming urban and characterize obvious pollution of groundwater quality respectively. Based on the reason analysis for TDS increase in groundwater, basic mechanism of the influence of human activities on groundwater quality in the study areas are discussed, which is expected to provide scientific basis for pollution prevention and control of shallow groundwater quality in Kunming urban.

scholarly journals Quality Assessments of Shallow Groundwaters for Drinking and Irrigation Purposes: Insights from a Case Study (Jinta Basin, Heihe Drainage Area, Northwest China)

Water ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2704 ◽  
Author(s):  
Jianguo Feng ◽  
Hao Sun ◽  
Minghao He ◽  
Zongjun Gao ◽  
Jiutan Liu ◽  
...  
Keyword(s):  
Drinking Water ◽  
Shallow Groundwater ◽  
Northwest China ◽  
Chemical Components ◽  
Agricultural Irrigation ◽  
Weakly Alkaline ◽  
Rock Interaction ◽  
Evaporative Concentration ◽  
Major Factors

This study aimed to determine the hydrochemical characteristics and hydrogeochemical processes of shallow groundwater in the Jinta Basin, northwest China, and to evaluate the suitability of groundwater quality for drinking water and agricultural irrigation. A systematic hydrogeological survey was conducted in the study area from May 2017 to October 2018, during which 123 representative samples of groundwater were selected for analysis of chemical parameters and determination of the water quality index. The results showed that the pH of groundwater in the study area was weakly alkaline and ranged between 7.21–8.93. Dominant cations were Mg2+ and Na+ and the dominant anion was SO42−. Along the groundwater flow from the southwest to northeast, the dominant groundwater chemistry type in the recharge area was Mg-HCO3·SO4. After the transition of the groundwater types in the runoff area to Mg-SO4·HCO3 and Mg·Na-SO4, the groundwater type in the discharge area evolved into Na·Mg-SO4·Cl. The major factors driving the evolution of groundwater chemical types in the Jinta Basin were found to be rock weathering, evaporation and precipitation. The chemical components of groundwater mainly originated from the dissolution of silicate rock and evaporative concentration of salt under water-rock interaction, whereas the dissolution of carbonate had little influence. The quality of drinking water was divided into five groups, and 39.84% of samples fell within the high and good quality groups. The quality of agricultural irrigation water was divided into different grades according to different methods.

scholarly journals Time evolution of groundwater quality in Dehui City

2019 ◽  
Vol 98 ◽  
pp. 09031
Author(s):  
Hongyang Wei ◽  
Xiujuan Liang
Keyword(s):  
Groundwater Quality ◽  
Chemical Components ◽  
Chemical Concentration ◽  
Rock Interaction ◽  
Songhua River ◽  
Development And Utilization ◽  
Hydrogeological Analysis ◽  
Hydrogeological Data ◽  
Water Rock Interaction

The unreasonable development and utilization of groundwater in Dehui City, China, has resulted in poor groundwater quality conditions. Based on the collection of a large amount of groundwater chemical data and hydrogeological data collected by Dehui City from 1992 to 2015, this paper uses hydrogeological analysis, graphic and other methods and ArcGIS toolbox to analyze the groundwater quality of this City. The study shows that the concentration of groundwater chemical components in the vicinity of the Songhua River is decreasing with time, and the concentration of groundwater chemical components in other regions is increasing with time. The increase of chemical concentrations are affected by human activities and water-rock interaction. The decrease of groundwater chemical concentration in Songhua River area is caused by the mixing between dilute river water and groundwater.

scholarly journals The hydrochemical characteristics and quality assessment of groundwater in Shuangliao City, China

2019 ◽  
Vol 98 ◽  
pp. 01034 ◽  
Author(s):  
Mingjun Liu ◽  
Changlai Xiao ◽  
Xiujuan Liang
Keyword(s):  
Groundwater Quality ◽  
Human Activities ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Hydrochemical Characteristics ◽  
Analytic Hierarchy ◽  
Liaohe River ◽  
Geological Conditions ◽  
Type Water

In this study, a hydrochemical investigation was conducted in Shuangliao city to identify the hydrochemical characteristics and the quality of groundwater using descriptive statistics and correlation matrices. And on that basis, combined with Analytic hierarchy process (AHP), an improved two-level fuzzy comprehensive evaluation method is used to evaluate the groundwater quality. The results indicate that the major cations and anions in groundwater are Ca2+ and HCO3-, respectively. The chemical types are mainly HCO3—Ca type water, some areas are complicated due to the influence of human activities. The evaluation results show that the water quality in the area is mostly III type water, and the groundwater quality in some areas is IV or V water due to the influence of primary geological conditions or human activities. The groundwater quality in the East Liaohe River Valley and Shuangliao urban area is relatively poor, and in the northwest part which is the saline alkali soil area is also relatively poor.

scholarly journals Anthropogenic Effects on Hydrogeochemical Characterization of the Shallow Groundwater in an Arid Irrigated Plain in Northwestern China

Water ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 2247 ◽  
Author(s):  
Wang ◽  
Mei ◽  
Yu ◽  
Li ◽  
Meng ◽  
...  
Keyword(s):  
Groundwater Quality ◽  
Saturation Index ◽  
Shallow Groundwater ◽  
Total Hardness ◽  
Agricultural Activity ◽  
Residential Areas ◽  
Weathering Processes ◽  
Natural Processes ◽  
Geostatistical Techniques ◽  
Hydrogeochemical Characterization

Many irrigated plains in arid and semi-arid regions have groundwater quality issues due to both intensive human activity and natural processes. Comprehensive studies are urgently needed to explore hydrogeochemical evolutions, investigate possible pollution sources, and understand the controls on groundwater compositions in such regions. Here, we combine geostatistical techniques and hydrogeochemical assessments to characterize groundwater quality over time in the Yinchuan Plain (a typical irrigated plain in China), using 12 physicochemical variables derived from sampling in 600 and 602 wells in 2004 and 2014, respectively. Our results show that groundwater-rock interactions and evaporation are the key natural factors controlling groundwater compositions. Hydrogeochemical water types in both 2004 and 2014 were Ca-HCO3, Na-Cl, and mixed Ca·Mg-Cl. Along with the hydrogeochemical compositions, we used ionic ratios and the saturation index to delineate mineral solution reactions and weathering processes. Dissolution of gypsum, halite, fluorite, and mirabilite, along with silicate weathering and cation exchange, were identified in the study area. Our results indicated rising ion concentrations in groundwater, which could be the result of anthropogenic influences. Increasing total hardness and nitrates over the study period were most likely caused by agricultural activity and the discharge of waste water from human residential areas.

scholarly journals Hydrochemical Characteristics and Temporal Variations of Geothermal Water Quality in Tangtou, Shandong, China

Water ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1643 ◽  
Author(s):  
Zongjun Gao ◽  
Jiutan Liu ◽  
Fuquan Li ◽  
Min Wang ◽  
Jianguo Feng ◽  
...  
Keyword(s):  
Water Quality ◽  
Clean Energy ◽  
Temporal Variations ◽  
Total Dissolved Solids ◽  
Geothermal Water ◽  
Total Hardness ◽  
Hydrochemical Characteristics ◽  
Dissolved Solids ◽  
Rock Interaction ◽  
Geological Conditions

Geothermal water resources are a kind of clean energy, which is a renewable resource to a certain extent and has a high value of development and utilization. To understand the hydrochemical characteristics, origins, and temporal variations of geothermal water quality in Tangtou, 13 geothermal water samples from 2007 to 2019 and geothermal geological conditions were collected. Cl− and Na+ are the major ions, which make the geothermal water belong Cl-Na type. The total dissolved solids values of geothermal waters were 1560–2512 mg/L and pH were in the range of 6.7–8.8. The development of faulted structures provides conditions for the formation of geothermal water. In addition, geothermal water is recharged by shallow underground cold water. Water-rock interaction, as well as mixing processes, in the process of long runoff path and the slower deep-water cycle is the main factor controlling the chemical composition of geothermal water. Calculated saturation index values indicated that the geothermal water was saturated with respect to silicate and carbonate minerals. Cation and silica chemical geothermometers indicated that reservoir temperatures ranged from 94.63 to 196.10 °C and from 69.13 to 123.75 °C, respectively. Based on the grey relational analysis, the main physicochemical components of geothermal water are obviously correlated with the geothermal water exploitation and precipitation. Overall, affected by exploitation and precipitation, main physicochemical components (such as the total dissolved solids, total hardness, temperature, Na+, Ca2+, Cl−, K+, and Mg2+) showed a certain stage.

Study on the Influence of Shallow Groundwater Source Heat Pumps on Groundwater Quality in Weifang, China

2014 ◽  
Vol 641-642 ◽  
pp. 97-100
Author(s):  
Qiang Huang ◽  
Wei Ping Wang ◽  
Hai Yan Deng
Keyword(s):  
Groundwater Quality ◽  
Heat Pump ◽  
Shallow Groundwater ◽  
Heat Pumps ◽  
Total Hardness ◽  
Project Area ◽  
Research Objects ◽  
Groundwater Source ◽  
Change Curve

Selecting 4 shallow groundwater source heat pump (GSHP) projects as research objects in Weifang city of Shandong province, China, the groundwater quality in the project area was, observed and analyzed by sampling continuously. The results show that the concentrations of chloride and the total hardness are relatively stable, and there are no apparent changes; In the change curve of TDS in different kind of shallow GSHPs, the worse the sealing condition of the project, the more obvious the rising trend of TDS; The concentration of nitrate is generally on the rise, and the concentration of ammonia appears in the trend of first increased then decreased. Therefore, in the region, the shallow GSHPs are not completely free from contamination in the current technology conditions and the application should be controlled and managed strictly. The observation of shallow GSHPs still need be conducted in a long term.

Characteristics of Hydrogeochemistry and Groundwater Quality in a Riverbank Filtration Site, Northeastern China

2020 ◽  
Author(s):  
Yanguo Teng ◽  
Yuanzheng Zhai ◽  
Haiyang Chen ◽  
Ruihui Chen
Keyword(s):  
Spatial Distribution ◽  
Groundwater Quality ◽  
Land Surface ◽  
Evaluation Method ◽  
Major Ions ◽  
Comprehensive Evaluation ◽  
Shallow Groundwater ◽  
Distribution Patterns ◽  
Total Hardness ◽  
Spatial Distribution Patterns

<p>Studies on hydrogeochemical characteristics and an assessment of the groundwater quality for drinking purposes were conducted in and around the riverside source field of Wuchang, Northeast China. Twenty-seven and twenty-three shallow groundwater samples were collected for measuring on-site parameters and major components in the years 2000 and 2014, respectively. In 2014, the average concentrations of major ions of shallow groundwater were found to be in the following order: Ca<sup>2+</sup>> Na<sup>+</sup>> Mg<sup>2+</sup>> K<sup>+</sup> for cations and HCO<sub>3</sub><sup>-</sup>> SO<sub>4</sub><sup>2-</sup>> Cl<sup>-</sup>> NO<sub>3</sub><sup>-</sup> for anions. The spatial distribution patterns of K<sup>+</sup> and NO<sub>3</sub><sup>-</sup> had no obvious regularity, whereas Cl<sup>-</sup> and Na<sup>+ </sup>showed similar spatial distribution patterns. Ca-HCO<sub>3</sub> and mixed type water were the dominant hydrochemical types. The analysis of the SI values for minerals and the Gibbs plot illustrated that the concentrations of major components were mainly controlled by rock weathering, such as the dissolution of calcite, dolomite, halite, gypsum and aragonite, followed by ion exchange. Indicators, such as Total hardness (TH), Total Dissolved Solids (TDS), Cl<sup>-</sup>, SO<sub>4</sub><sup>2- </sup>and NO<sub>3</sub><sup>-</sup>, were selected to assess the groundwater quality using a comprehensive evaluation method of dividing the groundwater quality into five classes: excellent, good, fair, poor and very poor water. The results showed that 7.4% and 34.8% of the total groundwater sample in 2000 and 2014, respectively, were unsuitable for drinking use, indicating that the shallow groundwater quality has gradually worsened in the past few decades. The concentration of NO<sub>3</sub><sup>- </sup>was a major factor that influenced the observed groundwater quality changes.</p><p><strong>Acknowledgments </strong></p><p>This study was supported by the NSFC (No.41877355), Beijing Advanced Innovation Program for Land Surface Science, and the 111 Project of China (B18006).</p>

scholarly journals Characterization and Cause Analysis of Shallow Groundwater Hydrochemistry in the Plains of Henan Province, China

2021 ◽  
Vol 13 (22) ◽  
pp. 12586
Author(s):  
Jian Sun ◽  
Baizhong Yan ◽  
Yao Li ◽  
Huixiao Sun ◽  
Yahui Wang ◽  
...  
Keyword(s):  
Groundwater Quality ◽  
Socioeconomic Development ◽  
Good Condition ◽  
Shallow Groundwater ◽  
Study Data ◽  
Scientific Data ◽  
Henan Province ◽  
Anthropogenic Factors ◽  
Hydrochemical Characteristics ◽  
Groundwater Environment

With the development of the human population and society, groundwater environmental problems have become an important factor limiting global socioeconomic development, and the study of groundwater hydrochemical characteristics and pollution is a current hot issue. In this study, data regarding shallow groundwater quality in 76 instances were used to evaluate the quality of shallow groundwater in the plains of Henan Province, China, by using a combination of subjective and objective assignments, mathematical statistics, Piper trilinear diagram, Gibbs diagram, ion ratio analysis, and other methods to study the hydrochemical characteristics of groundwater and its formation mechanism. The results showed that the groundwater quality in most areas of the plains of Henan Plain is in good condition, and the proportion of samples with excellent grades and good grades is as high as 43.42% and 35.53%. The range of poor and extremely poor water quality is small, and only five samples are judged as poor and extremely poor grades, mainly distributed in Jiaozuo City, Xinxiang City, Zhoukou City, and Puyang City. The groundwater anionic hydrochemistry is mainly of the HCO3 type, accounting for 61.84% of the samples and locally transformed downstream to HCO3·SO4, HCO3·SO4·Cl, HCO3·Cl·SO4, and Cl·SO4·HCO3. Cations are predominantly of the Ca/Mg and Ca–Mg/Mg–Ca type, and gradually transformed to the Na–Ca/Ca–Na and Na–Mg/Mg–Na type along the runoff direction. Water–rock interactions and anthropogenic factors dominate the hydrochemistry evolution, with major geochemical processes involving the precipitation of calcite and dolomite as well as the weathering dissolution of rock salt and fluorite. Human activity is an important factor affecting the distribution of NO3–N and Fe3+. It is recommended that groundwater be continuously monitored to provide scientific data for sustainable groundwater quality management and that appropriate measures be developed to prevent further degradation of the groundwater environment.

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