groundwater table Articles | Environmental XPRT

Assessment of the hierarchical involvement of chemical characteristics of soil layer particles during bacterial retention in Central Africa

The main purpose of this investigation was to rank, in hierarchical order, some soil chemical factors that impact the sorption parameters of fecal indicator bacteria and Salmonella sp, during their transfer from soil surface to the groundwater table. Sorption coefficients (Kf) and linearity exponents (Ϫ) were obtained using the Freundlich isotherm. When Salmonella sp was present alone, the values ...

Feb. 20, 2012

By Inderscience Publishers

Effects of sea level rise on hydrology: case study in a typical mid-Atlantic coastal watershed

Sea level rise (SLR) can negatively affect the hydrology of coastal watersheds. However, the relevant information is incomplete and insufficient in existing literature. The objective of this study is to present a modeling approach to predict long-term effects of SLR on changes of flood peak, flood stage, and groundwater table with an assumption that the historical climate would reoccur in the ...

Aug. 7, 2017

By IWA Publishing

Nutrient mobilisation and losses related to the groundwater level in low peat soils

The changes in dissolved organic carbon (DOC), N-NO3, N-NH4 and P-PO4 concentrations in response to fluctuations in the groundwater table were investigated in the peatlands of Biebrza National Park and some of its surrounding sites. The lowering of the groundwater table during summer time was accompanied by an increase in P-PO4 and N-NH4 concentrations, and in some cases they were exceptionally ...

May 27, 2009

By Inderscience Publishers

The MobiSan approach: informal settlements of Cape Town, South Africa

Pook se Bos informal settlement and the Cape Town Water & Sanitation Services Department are partnering on an urban sanitation project with a Dutch Consortium consisting of Lettinga Associates Foundation (LeAF), Landustrie Sneek and Vitens-Evides International. The aim of the project is to improve the basic sanitation services provided in informal settlements through the implementation of the ...

Jun. 1, 2010

By IWA Publishing

The effect of pipe collectors in reducing the drainage coefficient rate

A high groundwater table and soil salinity, especially in arid regions, often cause serious problems for agriculture. In irrigated areas the subsurface drainage can be an effective technique to lower the depth of the groundwater table and reduce soil salinity. In drainage systems, lateral pipes are designed to collect the free water from soil and convey it into collectors. In other words, ...

Jul. 24, 2015

By IWA Publishing

Comparative analysis of performance of neural network and neuro–fuzzy model in prediction of groundwater table fluctuation

Ground water is underlying natural resources widely distributed under the ground and not visible from the earth surface. Prediction of state of groundwater table is very important for water resources planning and management. To estimate this valuable natural resource, indirect methods have been adopted since past decades. An artificial neural network (ANN) and neuro–fuzzy network (NFN) model both ...

Sep. 24, 2012

By Inderscience Publishers

Analysis of groundwater–surface water interaction in horizontal unconfined aquifer bounded by a stream and groundwater divide using a non–linear numerical model

In this study, a non–linear numerical model was developed to analyse the interaction between the drainage water moving from an unconfined aquifer and a surface water body. This interaction can occur during or after a rainfall event, which can cause the groundwater table to change. At first, a laboratory–scale aquifer model with stream and groundwater divide boundaries was established to examine ...

Dec. 17, 2013

By Inderscience Publishers

An approximate solution for two-dimensional groundwater infiltration in sewer systems

Estimating groundwater infiltration into sewer systems is important for wastewater treatment operators and municipalities. This paper presents an approximate solution for steady-state groundwater infiltration into sewer systems through line defects. The groundwater table was assumed to be horizontal and the aquifer homogeneous and isotropic. Mobius transformation technique and equivalent ...

Nov. 20, 2012

By IWA Publishing

Temporary Construction Dewatering Solutions

Mention “dewatering” to anyone outside of the underground construction trade, and typically, with a blank stare, they’ll ask what is D-watering? Mention dewatering to anyone in the underground construction trade, and they’ll likely state that it is one of the most important phases in the project, as a well designed and installed dewatering system will allow them to ...

May 1, 2011

By Griffin Dewatering Corporation

Systemic insights into agricultural groundwater management: case of Firuzabad Plain, Iran

Groundwater decline poses a significant sustainability challenge in arid and semi-arid areas where groundwater plays a major life sustaining role. Recent years have marked a drastic decrease in the groundwater table (about 1.1 m/yr equivalent to 19.3 million cubic metres) in the Firuzabad Plain, Iran, where policies to restore groundwater have mostly failed. A holistic view is required to ...

Apr. 29, 2017

By IWA Publishing

Griffin Dewatering pumps 15 million gallons of water from flood control project with 75 foot deep wells

On April 29 2011, Houston-based Griffin Dewatering Corp. began pumping 15 million gallons of water from the site. It also used 42 10-in.-dia, 75-ft-deep wells outside the dam perimeter to lower the groundwater table and relieve external hydraulic pressure. Griffin is working on several Corps projects in New Orleans, but Michael Lippard, Griffin senior project manager, says Seabrook is ...

May 9, 2011

By Griffin Dewatering Corporation

Soil & Groundwater treatment of Chlorinated Solvents

Project: Treated 675 Cubic Yards of Chlorinated Contaminated Soil and Groundwater Client: Operating Dry Cleaners Location: Lexington, Kentucky Scope of work: In-Situ Bioremediation Project cost: $7,575 (Included earthmoving, labor, and all bioremediation materials) Source of contamination: Leaking UST Project duration: 21 months Status: Treatment Completed: Site will be monitored Description: A ...

Jan. 1, 2005

By Catalina Biosolutions

Rationalising water management policies: tube well development and resource use sustainability in Balochistan region of Pakistan

The groundwater driven agricultural production is increasingly under threat due to rapidly depleting groundwater table in upland Balochistan region of Pakistan. Both government and water users can be blamed for the foreseen disaster. The government’s policy for groundwater development following over estimation of groundwater reserves and the water user’s inefficient usage are the main reasons ...

Oct. 1, 2013

By Inderscience Publishers

Quality assessment of deep-well recharge applications in the Netherlands

Artificial recharge of aquifers can be performed for various purposes and under varying hydrogeological conditions. We present an overview of deep-well recharge applications which have taken place in the Netherlands over the last two decades. We present the purpose of each application, the issues which had to be resolved, the preventive measures which were taken to improve performance and the ...

Mar. 16, 2017

By IWA Publishing

Risk assessment study for water supply network using GIS

In recent years, contamination of water in water distribution systems (WDS) has been recognized as a major cause of waterborne diseases. Owing to old and deteriorated pipes, and the presence of pollution sources in contact with the supply line, water boards often decide to replace the network in the interests of public health. This being a cost-intensive and time-consuming programme, decision ...

Jan. 1, 2010

By IWA Publishing

Biofuel Promotion for Environmentally Sustainable Energy and Water Services

The success of power sector reform in India will rely in part on groundwater management improvements in the agricultural sector. Unreliable power supply and subsidized tariff structures lead to excessive water pumping by farmers who tend to pump water based on the power supply made available to them. Over-pumping contributes to higher energy consumption and rapid depletion of the groundwater ...

Mar. 25, 2008

By Asia-Pacific Partnership on Clean Development and Climate

Impact of sea level rise and over-pumping on seawater intrusion in coastal aquifers

Climate change, sea level rise, over-pumping and saltwater intrusion present some of the future challenges of water resources management in coastal areas. Over-abstraction is considered one of the main causes of seawater intrusion and the rise in sea levels accelerates the intrusion. With the combined impact of sea level rise and over-pumping the problem becomes exacerbated and requires urgent ...

Mar. 1, 2011

By IWA Publishing

Water sensitive urban design retrofits in Copenhagen – 40% to the sewer, 60% to the city

Water Sensitive Urban Design (WSUD) is emerging in Denmark. This interdisciplinary desk study investigated the options for WSUD retrofitting in a 15 km2 combined sewer catchment area in Copenhagen. The study was developed in collaboration with the City of Copenhagen and its water utility, and involved researchers representing hydrogeology, sewer hydraulics, environmental ...

May 9, 2013

By IWA Publishing

The nexus between groundwater modeling, pit lake chemogenesis and ecological risk from arsenic in the Getchell Main Pit, Nevada, U.S.A.

Abstract: The proliferation of mine pits that intersect the groundwater table has engendered interest in environmental consequences of the lakes that form after cessation of dewatering. The Getchell Main Pit (GMP) in Nevada hosts arsenic sulfide (AsxSy) mineralization (e.g., orpiment and realar) and ambient groundwater As up to 1.8 mg L-1 , making groundwater inflow a potentially significant As ...

Dec. 20, 2019

By Itasca International, Inc

A new deterministic method for groundwater mapping using a digital elevation model

Accurate knowledge of groundwater levels and flow conditions in the vicinity of groundwater-dependent terrestrial ecosystems (GWDTE-s) is required for identifying groundwater dependency and comparing the present situation with the optimal one, as part of the status assessment of groundwaters according to the EU Water Framework Directive. Geostatistical methods (like kriging or cokriging) may ...

Aug. 6, 2013

By IWA Publishing

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