scholarly journals Groundwater quality and groundwater levels in Dougherty County, Georgia, April 2019 through March 2020

2020 ◽  
Author(s):  
Debbie W. Gordon
Keyword(s):  
Groundwater Quality ◽  
Groundwater Levels ◽  
Dougherty County

scholarly journals Investigating Groundwater Condition and Seawater Intrusion Status in Coastal Aquifer Systems of Eastern India

Water ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 1952
Author(s):  
Subrata Halder ◽  
Lingaraj Dhal ◽  
Madan K. Jha
Keyword(s):  
Groundwater Quality ◽  
Seawater Intrusion ◽  
Groundwater Level ◽  
Coastal Aquifer ◽  
Quality Data ◽  
Confined Aquifer ◽  
Groundwater Levels ◽  
Post Monsoon ◽  
Aquifer Systems ◽  
Sustainable Water Supply

Providing sustainable water supply for domestic needs and irrigated agriculture is one of the most significant challenges for the current century. This challenge is more daunting in coastal regions. Groundwater plays a pivotal role in addressing this challenge and hence, it is under growing stress in several parts of the world. To address this challenge, a proper understanding of groundwater characteristics in an area is essential. In this study, spatio-temporal analyses of pre-monsoon and post-monsoon groundwater-levels of two coastal aquifer systems (upper leaky confined and underlying confined) were carried out in Purba Medinipur District, West Bengal, India. Trend analysis of seasonal groundwater-levels of the two aquifers systems was also performed using Mann-Kendall test, Linear Regression test, and Innovative Trend test. Finally, the status of seawater intrusion in the two aquifers was evaluated using available groundwater-quality data of Chloride (Cl−) and Total Dissolve Solids (TDS). Considerable spatial and temporal variability was found in the seasonal groundwater-levels of the two aquifers. Further, decreasing trends were spotted in the pre-monsoon and post-monsoon groundwater-level time series of the leaky confined and confined aquifers, except pre-monsoon groundwater-levels in Contai-I and Deshpran blocks, and the post-monsoon groundwater-level in Ramnagar-I block for the leaky confined aquifer. The leaky confined aquifer in Contai-I, Contai-III, and Deshpran blocks and the confined aquifer in Nandigram-I and Nandigram-II blocks are vulnerable to seawater intrusion. There is an urgent need for the real-time monitoring of groundwater-levels and groundwater quality in both the aquifer systems, which can ensure efficient management of coastal groundwater reserves.

scholarly journals Evaluation of Seasonal Groundwater Quality Changes Associated with Groundwater Pumping and Level Fluctuations in an Agricultural Area, Korea

Water ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 51
Author(s):  
Kyoochul Ha ◽  
Eunhee Lee ◽  
Hyowon An ◽  
Sunghyun Kim ◽  
Changhui Park ◽  
...  
Keyword(s):  
Water Quality ◽  
Groundwater Quality ◽  
Groundwater Level ◽  
Irrigation Water ◽  
Agricultural Area ◽  
Water Type ◽  
Quality Changes ◽  
Groundwater Pumping ◽  
Rice Paddies ◽  
Groundwater Levels

This study was conducted to evaluate seasonal groundwater quality due to groundwater pumping and hydrochemical characteristics with groundwater level fluctuations in an agricultural area in Korea. Groundwater levels were observed for about one year using automatic monitoring sensors, and groundwater uses were estimated based on the monitoring data. Groundwater use in the area is closely related to irrigation for rice farming, and rising groundwater levels occur during the pumping, which may be caused by the irrigation water of rice paddies. Hydrochemical analysis results for two separate times (17 July and 1 October 2019) show that the dissolved components in groundwater decreased overall due to dilution, especially at wells in the alluvial aquifer and shallow depth. More than 50% of the samples were classified as CaHCO3 water type, and changes in water type occurred depending on the well location. Water quality changes were small at most wells, but changes at some wells were evident. In addition, the groundwater quality was confirmed to have the effect of saltwater supplied during the 2018 drought by comparison with seawater. According to principal component analysis (PCA), the water quality from July to October was confirmed to have changed due to dilution, and the effect was strong at shallow wells. In the study areas where rice paddy farming is active in summer, irrigation water may be one of the important factors changing the groundwater quality. These results provide a qualitative and quantitative basis for groundwater quality change in agricultural areas, particularly rice paddies areas, along with groundwater level and usage.

scholarly journals Regional Groundwater Quality Management through Hydrogeological Modeling in LCC, West Faisalabad, Pakistan

2017 ◽  
Vol 2017 ◽  
pp. 1-16 ◽  
Author(s):  
Aamir Shakoor ◽  
Zahid Mahmood Khan ◽  
Muhammad Arshad ◽  
Hafiz Umar Farid ◽  
Muhammad Sultan ◽  
...  
Keyword(s):  
Groundwater Quality ◽  
Poor Quality ◽  
Quality Data ◽  
Groundwater Depletion ◽  
Command Area ◽  
Canal Water ◽  
Pumping Rate ◽  
Groundwater Levels ◽  
Regional Groundwater

The intensive abstraction of groundwater is causing a number of problems such as groundwater depletion and quality deterioration. To manage such problems, the data of 256 piezometers regarding groundwater levels and quality were acquired for the period of 2003 to 2012 in command area of Lower Chenab Canal (LCC), West Faisalabad, Pakistan. MODFLOW and MT3D models were calibrated for the period of 2003–2007 and validated for years 2008–2012 with respect to observed groundwater levels and quality data, respectively. After the successful calibration and validation, two pumping scenarios were developed up to year 2030: Scenario I (increase in pumping rate according to the historical trend) and Scenario II (adjusted canal water supplies and groundwater patterns). The predicted results of Scenario I revealed that, up to year 2030, the area under good quality groundwater reduced significantly from 50.35 to 28.95%, while marginal and hazardous groundwater quality area increased from 49.65 to 71.06%. Under Scenario II, the good quality groundwater area increased to 6.32% and 12.48% area possesses less hazardous quality of groundwater. It was concluded that the canal water supply should shift from good quality aquifer zone to poor quality aquifer zone for proficient management of groundwater at the study area.

The effects of the 1975–76 drought on groundwater and aquifers

1978 ◽  
Vol 363 (1712) ◽  
pp. 55-68 ◽  
Keyword(s):  
Adverse Effects ◽  
Groundwater Quality ◽  
Early Spring ◽  
Underground Storage ◽  
British Isles ◽  
Groundwater Levels ◽  
Aquifer Storage ◽  
Base Level ◽  
Long Term Adverse Effects

The drought of 1975–76 that affected not only the British Isles but extended to much of the continent of Europe, became severe only after the exceptionally dry winter of 1975/76 when within most of England and Wales negligible recharge to aquifers occurred. Thus by the spring of 1976 when seasonal underground storage should have been at its peak, aquifer storage was already at a very low level. Since, however, groundwater levels in aquifers are controlled by local and variable base level drainage conditions, the extent to which further falls in level could occur under natural unconfined conditions was limited so that by autumn 1976 in most places levels were lower than those previously recorded by only a few metres. Within confined aquifers having lower storativities, effects were usually more severe and falls in level below those previously recorded of more than 10 m occurred. Had it not been for the exception­ally wet winter of 1974/75 when recharge to aquifers was generally well above average, groundwater levels in the autumn of 1976 might have been considerably lower. The authors have been unable to discern any long-term adverse effects on British aquifers in which by the early spring of 1977 groundwater levels had, in almost every known case, recovered to higher than average levels except in areas with levels lowered previously by over-abstraction. No permanent ill effects on groundwater quality have so far become apparent.

scholarly journals Groundwater Quality on the Adriatic Karst Island of Mljet (Croatia) and Its Implications on Water Supply

Geofluids ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-14 ◽  
Author(s):  
Staša Borović ◽  
Josip Terzić ◽  
Marco Pola
Keyword(s):  
Water Supply ◽  
Groundwater Quality ◽  
Sole Source ◽  
Management Plan ◽  
Effluent Treatment ◽  
Feed Water ◽  
Time Interval ◽  
Anthropogenic Pressure ◽  
Aquifer Recharge ◽  
Groundwater Levels

Water supply of the islands is a global challenge, especially in the countries which have highly indented coastlines with numerous islands. The island of Mljet in Croatia was investigated due to its unique source of water supply: desalination of water from brackish lakes—blatinas—fed by groundwater and connected to the sea by karst conduits. Water sampling and chemical analyses were performed during hydrological minimum and maximum with regard to groundwater levels in 2005/2006 and minimum in 2016. A total of 13 samples were analysed within the study: 10 samples were taken from blatinas, 1 from pit well, and 2 from borehole wells. All waters sampled from the lakes are of Na-Cl type. The seawater percentage in the lakes used to extract feed water for desalination plants, calculated by conservative mixing approach, is relatively low (0.7-9.8%) and varies in correlation with hydrological seasons. Low proportion of seawater is an essential factor of cost minimisation in desalination by the installed reverse osmosis (RO) plants. Daily monitoring of total dissolved solids in the feed water was introduced in May 2016, and its results were analysed in the context of precipitation—a sole source of island aquifer recharge. Maximum concentrations were observed during September and interpreted to be caused by a combination of natural and anthropogenic pressure during the summer tourist season. Minimum concentrations were expected after the rainy season in the cold part of the year but were observed in June instead. Due to a short observation period and untypical distribution of precipitation in the same time interval, the data can only be considered indicative. An unusual pattern of sulphate anion concentrations, which cannot be attributed solely to fresh- and seawater mixing, was observed in one of the blatinas, but its origin could not be determined based on available data. Taking into account all the presented data on groundwater quality, climate change predictions, the connection of water supply system to the mainland and problems with the effluent treatment, it is clear that the main future challenge will be the creation of an island-wide sustainable water management plan followed by continuous monitoring and research.

scholarly journals Assessment of the Impacts of Groundwater Overdrafting on Water Quality and Environmental Degradation in the Fares Area, Aswan, Egypt

2021 ◽  
pp. 529-551
Author(s):  
Mohamed Saber ◽  
Omar Ahmed ◽  
Esmat A. Keheila ◽  
Mohamed Abdel-Moneim Mohamed ◽  
Sameh A. Kantoush ◽  
...  
Keyword(s):  
Water Quality ◽  
Groundwater Quality ◽  
Environmental Impacts ◽  
Environmental Degradation ◽  
Chemical Characterization ◽  
Reclaimed Land ◽  
Surrounding Water ◽  
Groundwater Levels ◽  
Short Period ◽  
Critical Issues

AbstractGroundwater contamination and the environmental impact of groundwater uprising due to overpumping are critical issues in Egypt. The main purpose of this study is to evaluate the groundwater quality and the environmental impacts of groundwater uprising in the Fares area of Aswan, Egypt. The environmental impacts of the uprising groundwater level were investigated through field observations and chemical analyses of the surrounding water resources. The results revealed that the use of flood irrigation systems in the upper, newly reclaimed land area is the main cause of the uprising groundwater levels, which causes remarkable environmental degradation in the urban area. Thirty-three samples were collected and chemically analyzed from three groundwater wells. The chemical characterization of the groundwater at Well 1 drastically changed from NaHCO3 to NaCl within a short period of time due to overdrafting. The chemical concentrations of all parameters showed considerable increasing trends and exceeded the standard limits at Well 1. The study stated that the groundwater overdrafting causes extreme changes in the water quality within a very short period of time along with the impacts on the environment. This condition requires attention from decision makers, as the groundwater quality is continuously decreased and the environment is degraded.

Evaluation of dynamic groundwater quality simulation based on Cloud-GIS: a case study in Harbin urban area, China

2014 ◽  
Vol 14 (6) ◽  
pp. 1095-1104 ◽  
Author(s):  
Baoling Liu ◽  
Gang Li ◽  
Hong You ◽  
Mingrui Sui ◽  
Shutao Wang
Keyword(s):  
Mathematical Models ◽  
Groundwater Quality ◽  
Missing Values ◽  
Evaluation Method ◽  
Joint Modeling ◽  
Simulation Platform ◽  
Fuzzy Evaluation ◽  
Grey Prediction ◽  
Weighting Method ◽  
Groundwater Levels

This paper consists of two parts. The first part addresses the joint modeling of both spatial and temporal elements to perform dynamic evaluation of groundwater quality. In this part, a grey prediction method was used to predict missing values and then, on the basis of an entropy-weighting method, to build a dynamic weight model which continually changes with time; finally, a fuzzy evaluation method was used to evaluate groundwater quality. MATLAB was used to integrate these mathematical models. The second part describes the construction of a dynamic simulation platform which integrated mathematical models, a property database, and a spatial database, with secondary developments in geographic information system (GIS) and cloud-based simulation technology. All calculation steps and simulation programs were carried out on the simulation platform. The results indicated the grade of groundwater quality between II and IV. Groundwater quality gradually rose in the first and fourth quarters, but continually decreased in the second and third quarters. The lowest groundwater-quality value for the entire year appeared in October. This result also illustrates that turning points in groundwater quality appear when groundwater levels increase or decrease along rivers.

scholarly journals Groundwater development, use, and its quality in Korea: tasks for sustainable use

Water Policy ◽  
2021 ◽  
Author(s):  
Jin-Yong Lee ◽  
Jihye Cha ◽  
Maimoona Raza
Keyword(s):  
Groundwater Quality ◽  
Stream Water ◽  
Integrated Management ◽  
Sustainable Use ◽  
Groundwater Development ◽  
Steady Increase ◽  
Data Quality Control ◽  
Groundwater Levels ◽  
Groundwater Environment ◽  
The Republic

Abstract In this study, the current state of groundwater development and use and groundwater quality has been examined based on official groundwater data collected from the Republic of Korea. The groundwater data indicate a steady increase in the number of groundwater wells and an increase in groundwater pumping. The well diameters also increase with increasing well depth, owing to the development of drilling technology. Although groundwater is predominantly used for agricultural and living purposes, the former has recently outnumbered the latter. According to the groundwater quality monitoring stations covering the entire country, the groundwater levels, dissolved oxygen, and oxidation–reduction potential decrease with a steady increase in the water temperature, pH, and electrical conductivity, indicating an aggravating groundwater environment in this region. The most concerning contaminants found are nitrate, ammonia, arsenic, zinc, toluene, xylene, chloroform, and fluoride. Thus, based on these observations, we propose three essential tasks for sustainable groundwater use: a paradigm shift in groundwater management, conjunctive use and integrated management of groundwater and stream water, and groundwater governance and data quality control.

Spatio-temporal assessment of groundwater level and quality in urban coastal city Puri, India

2011 ◽  
Vol 11 (2) ◽  
pp. 194-201 ◽  
Author(s):  
Ritesh Vijay ◽  
S. S. Ramya ◽  
P. R. Pujari ◽  
P. K. Mohapatra
Keyword(s):  
Groundwater Quality ◽  
Anthropogenic Activities ◽  
Geographical Information ◽  
Open Defecation ◽  
Domestic Waste ◽  
Groundwater Levels ◽  
Groundwater Fluctuation ◽  
Spatio Temporal ◽  
City Water ◽  
The City

Puri city is situated on the shoreline of Bay of Bengal and groundwater is the only source available to meet the city water supply mainly from two demarcated water fields. Due to the anthropogenic activities and absence of sewerage system, groundwater quality is deteriorating through open discharges of domestic waste, open defecation, septic tanks, soak pits, contaminated water pools, unorganized waste dumping etc. The objective of the paper was to assess seasonal groundwater fluctuation and water quality in terms of physcio-chemical and bacteriological parameters. For this, groundwater levels were measured and samples were collected during post-monsoon (November 2006) and pre-monsoon (June 2007) from the water fields and city area. Groundwater quality was represented spatially and temporally using geographical information system and evaluated with national and international drinking water standards. Based on the groundwater quality, suitable measures were suggested to minimize further groundwater contamination.

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