Groundwater Hydrology, Soil and Groundwater Contamination Assessment and Monitoring

2018 ◽  
pp. 70-99
Author(s):  
Weixing Tong
Keyword(s):  
Groundwater Contamination ◽  
Groundwater Hydrology ◽  
Contamination Assessment ◽  
Assessment And Monitoring

scholarly journals A GIS-Based Groundwater Contamination Assessment Using Modified DRASTIC Geospatial Technique

Water ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 2868
Author(s):  
Ahsen Maqsoom ◽  
Bilal Aslam ◽  
Mamdooh Alwetaishi ◽  
Muhammad Awais ◽  
Usman Hassan ◽  
...  
Keyword(s):  
Groundwater Contamination ◽  
Anthropogenic Activities ◽  
Analysis Data ◽  
Major Effect ◽  
High Susceptibility ◽  
Contamination Assessment ◽  
Drastic Model ◽  
Quality Of Water ◽  
Soil Media ◽  
Water Quality And Quantity

Groundwater contamination along with anthropogenic actions and land use forms are increasing threats in urbanized zones around the world. Additionally, water quality and quantity are declining due to urbanization development. DRASTIC parameters (depth to the water table, net recharge, aquifer media, soil media, topography, impact of the vadose zone, hydraulic conductivity) were considered to investigate hydrological characteristics for assessment of contamination. Having a major effect of anthropogenic activities, various susceptibility zones were produced by modifying the DRASTIC model into DRASTICA, integrating anthropogenic effects as the “A” parameter in an alphabetic system. After the assessment, the research exposes that from the total area, 14% is under very high susceptibility, 44% is of high susceptibility, 39% is of moderate susceptibility, and 3% is of low susceptibility to groundwater pollution. The results in the built-up areas and based on the parameter of nitrate in quality of water show that the altered DRASTIC model or DRASTICA model proved to give better outcomes compared with the usual DRASTIC model. The policy advisers and management authorities must use the analysis data as precaution measures so that future calamities can be avoided.

Groundwater contamination assessment for sustainable water supply in Kathmandu Valley, Nepal

2002 ◽  
Vol 46 (9) ◽  
pp. 147-154 ◽  
Author(s):  
N.R. Khatiwada ◽  
S. Takizawa ◽  
T.V.N. Tran ◽  
M. Inoue
Keyword(s):  
Water Quality ◽  
Water Supply ◽  
Groundwater Contamination ◽  
Kathmandu Valley ◽  
Contamination Assessment ◽  
Supply Source ◽  
Deep Wells ◽  
Guideline Values ◽  
Sustainable Water Supply ◽  
Iron Manganese

A study was carried out to assess the water quality situation of groundwater sources in Kathmandu Valley, Nepal. Groundwater has remained to be a major water supply source for a population of 1.5 million at present in the valley. The focus of this study was to evaluate the extent and sources of groundwater contamination. Water sampling was carried out in selected deep wells and shallow sources. The level of pollution was evaluated by comparing the water quality results with WHO guidelines. The major problems with the dug wells, hand pumps and spouts were found to be the elevated nitrate and mercury contents. The deep wells located on the central aquifer were found to have a serious threat of ammonia pollution. Deep wells were also found to have iron, manganese and mercury concentrations exceeding the guideline values. Multivariate statistical analysis was carried out to cluster the sampling sources and identify the common factors describing the potential sources and possible mechanisms associated with the contaminants. The results suggested that disintegration of the sediment organic matter under strong reducing environment leads to the origin of the unusual water qualities at the central confined aquifer. This process may be microbially mediated and occurs with the simultaneous reduction of species such as arsenic, iron, manganese and sulfate. Both natural and anthropogenic water quality problems were observed in the groundwater system of Kathmandu valley. Attention should be focused to consider distinct strategies to address these problems.

scholarly journals Hydrocarbon contamination, assessment and remediation practice

2021 ◽  
Author(s):  
Nizar Kazem
Keyword(s):  
Phase I ◽  
Groundwater Contamination ◽  
Point Of View ◽  
Hydrocarbon Contamination ◽  
Phase Iii ◽  
Organic Chemicals ◽  
Contamination Assessment ◽  
Site Assessment ◽  
The Media ◽  
Principles Of Geology

Organic chemicals are used in all types of industries including but not limited to automotive and engine repair, dry cleaning, asphalt operations, dye manufacturing, agricultural activities, and food processing. The usage of organic chemicals is of increasing concern to regulators because of the contamination of soil and groundwater resulting from the mishandling and disposal of these chemicals. Typically, drums, underground and aboveground tanks are used to store these organic chemicals. The presence of large amount of chemicals, gasoline, and diesel fuel on-site is considering an indicator of the potential for soil and groundwater contamination. Due to leaking UST or surface spills of organic chemicals and its constituent it becomes the common culprits of soil and groundwater contamination. The first step toward implementing a remediation is to provide for [...] a better understanding of the physical properties of the organic chemicals themselves. This study reviews the chemistry of hydrocarbon and the fundamental concepts and principles of geology and hydrogeology, since the media where the contamination is taking place, and followed by a discussion of the fate and transport of contaminants in the subsurface, from an industry and regulatory point of view. The types and design of remediation system was overlooked and applied in a real case of study of Phase I, II and [III] Environmental Site Assessment. This study concluded with an overview of the application of the remote sensing in the environmental industry and its future potential involvement in the environmental site assessments, Phase I through Phase III audits.

scholarly journals Hydrocarbon contamination, assessment and remediation practice

2021 ◽  
Author(s):  
Nizar Kazem
Keyword(s):  
Phase I ◽  
Groundwater Contamination ◽  
Point Of View ◽  
Hydrocarbon Contamination ◽  
Phase Iii ◽  
Organic Chemicals ◽  
Contamination Assessment ◽  
Site Assessment ◽  
The Media ◽  
Principles Of Geology

Organic chemicals are used in all types of industries including but not limited to automotive and engine repair, dry cleaning, asphalt operations, dye manufacturing, agricultural activities, and food processing. The usage of organic chemicals is of increasing concern to regulators because of the contamination of soil and groundwater resulting from the mishandling and disposal of these chemicals. Typically, drums, underground and aboveground tanks are used to store these organic chemicals. The presence of large amount of chemicals, gasoline, and diesel fuel on-site is considering an indicator of the potential for soil and groundwater contamination. Due to leaking UST or surface spills of organic chemicals and its constituent it becomes the common culprits of soil and groundwater contamination. The first step toward implementing a remediation is to provide for [...] a better understanding of the physical properties of the organic chemicals themselves. This study reviews the chemistry of hydrocarbon and the fundamental concepts and principles of geology and hydrogeology, since the media where the contamination is taking place, and followed by a discussion of the fate and transport of contaminants in the subsurface, from an industry and regulatory point of view. The types and design of remediation system was overlooked and applied in a real case of study of Phase I, II and [III] Environmental Site Assessment. This study concluded with an overview of the application of the remote sensing in the environmental industry and its future potential involvement in the environmental site assessments, Phase I through Phase III audits.

scholarly journals Temporal and Spatial Groundwater Contamination Assessment Using Geophysical and Hydrochemical Methods: The Industrial Chemical Complex of Estarreja (Portugal) Case Study

2021 ◽  
Vol 11 (15) ◽  
pp. 6732
Author(s):  
Tiago Marques ◽  
Manuel Senos Matias ◽  
Eduardo Ferreira da Silva ◽  
Nuno Durães ◽  
Carla Patinha
Keyword(s):  
Groundwater Flow ◽  
Groundwater Contamination ◽  
Contamination Assessment ◽  
Flow Paths ◽  
Environmental Liabilities ◽  
Industrial Chemical ◽  
Hydrochemical Data ◽  
Combined Use ◽  
Chemical Complex ◽  
Contamination Plume

With more than a half-century in operation, the industrial chemical complex of Estarreja (ICCE) in northern Portugal has left serious environmental liabilities in the region. Although protective measures were implemented, soils, surface, and groundwater contamination caused by persistent pollutants are still prevalent. This study presents data from several geophysical and hydrochemical campaigns carried out to monitor groundwater contamination in the Estarreja region over a period of 30 years. Both geophysical and hydrochemical data showed a good agreement and revealed an important anomaly caused by groundwater contamination (high levels of Na, Cl, SO4, and Fe, among others) in 2006–2007, likely caused by the remobilization of waste pollutants (roasted pyrites, soils, and sludge) during their deposition in a sealed landfill (operating between 2003 and 2005). More recently, in 2016, this impact persists, but was more attenuated and showed a general migration pattern from E to SW according to one of the main groundwater flow paths. Groundwater flow in this region has a local radial behaviour. Drainage effluent systems, such as ditches and buried pipes formerly used by ICCE, are also likely to contribute to some contamination “hotspots”. Finally, the results obtained by the combined use of these two approaches allowed for the delineation of the contamination plume for future monitoring.

Groundwater contamination by Cr(VI) in the Aosta Plain (northern Italy): characterization and preliminary modeling

2015 ◽  
Vol 35 ◽  
pp. 21-24 ◽  
Author(s):  
Tullia Bonomi ◽  
Letizia Fumagalli ◽  
Gennaro A. Stefania ◽  
Marco Rotiroti ◽  
Federica Pellicioli ◽  
...  
Keyword(s):  
Groundwater Contamination ◽  
Northern Italy
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