Author: Prodeo Yao AgbotuiPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Characterisation of Flow Regimes of the East Yorkshire Chalk Aquifer
Author: Prodeo Yao AgbotuiFlow and Transport in the Confined Chalk Aquifer in East Yorkshire
Author: Silke HartmannEnhanced Characterization and Representation of Flow Through Karst Aquifers
Author: Scott L. PainterPublisher: American Water Works Association
ISBN: 1583214895
Category : Aquifers
Languages : en
Pages : 105
Book Description
This research report summaries and details the first year of work on a multi-year karst modeling project organized to develop enhanced groundwater modeling capabilities that can be used to effectively manage karst aquifers. Discussed are the three key considerations for modeling karst systems were identified: representation of conduits in flow models, representation of flow dynamics in conduits, and representation of partially filled conduits and the numerical experiments used to identify the limitations and advantages of the three general representations of conduits within groundwater models. A new dual-conductivity MODFLOW-2000 package (DCM) was developed for testing the dual-conductivity approach. A turbulence model was added, the software was validated using simple benchmark problems, and code documentation was completed. Simultaneous demonstrations showed that the modeling tool can be successfully applied in complex applications.
The Chalk Aquifer of Yorkshire
Author: I. N. GalePublisher:
ISBN: 9780852724804
Category : Aquifers
Languages : en
Pages : 60
Book Description
The Chalk Aquifers of Northern Europe
Author: R.P. FarrellPublisher: Geological Society of London
ISBN: 1786205513
Category : Science
Languages : en
Pages : 471
Book Description
The Cretaceous Chalk aquifers of Northern Europe underlie and support many sensitive ecosystems whilst at the same time being an important source of drinking water. Understanding, managing and protecting this valuable asset has always been a challenge and this volume brings together 25 papers representing current knowledge of the Chalk across a variety of thematic sections. The contributions look at aquifer properties, geology and karst; groundwater monitoring in the Chalk; groundwater management; groundwater-fed wetlands; engineering in the Chalk; heat and solute transport; diffuse pollution; and point source pollution. Geographically, the book includes studies undertaken in England, France, Belgium and Denmark. As well as academic papers, many of the chapters are practitioner focused and the editors hope that anyone working in Chalk groundwaters in Northern Europe, whether in academic, consultancy, water company or regulatory roles, will find this book an invaluable resource.
Report
Author: Institute of Geological Sciences (Great Britain)Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 326
Book Description
Hydrology of the Chalk Aquifer in East Yorkshire from Spring Recession Analysis
Author: Nozad Hasan AzeezModelling Groundwater Protection Zones in the East Yorkshire Chalk Aquifer
Author: Simon Philip JonesPublisher:
ISBN:
Category : Aquifers
Languages : en
Pages : 120
Book Description
The Migration and Attenuation of Gasworks Contaminants in the Chalk Aquifer
Author: Jonathan Mark BurtonPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The first gasworks were developed in the early 19th Century and their usage increased until the 1970's when the manufacture of town gas was phased out owing to the new natural gas supply. Consequently, gasworks often have a long history of potentially contaminative use. The main process utilised on these sites, coal carbonization, produced a broad range of potential contaminants including phenols, benzene, toluene, ethylbenzene and xylene (BTEX), polycyclic aromatic hydrocarbons (P AH's), ammonium, and cyanides. This study has focused largely on ammonium and phenol migration and attenuation in the Chalk aquifer and overlying sediments, following the extensive characterisation of a former gasworks at St Albans, Hertfordshire, UK. Invasive and non-invasive techniques, including borehole construction, enabling core- retrieval, "--And geophysical investigation methods respectively, have been used to characterise the nature and extent of contamination and the possible migration pathways in the Chalk aquifer. Chalk pore-water quality analyses indicate that the aquifer is contaminated at depth, but attenuation of ammonium and phenol is sufficient to reduce .- 'concentrations to an acceptable level in the nearby Holywell Hill pumping station. Concentrations of ammonium, phenols and the BTEX compounds in fissure-derived water beneath the former gasworks are well above drinking water" standards, and long- term monitoring has shown that their distribution is closely related to fluctuations in water levels and changes in pumping regimes at the pumping station. Excavation and drilling work has highlighted the variability in the depth of the Chalk surface over the study area, and this has a significant influence on groundwater flow and contaminant -- distribution. Batch adsorption experiments on unsaturated and saturated zone sediments suggest that -phenol is only adsorbed by topsoil samples owing to the presence of specific fractions of organic matter. Ammonium adsorption was highest in unsaturated zone sediments and is closely related to surface area and cation exchange capacity. Leaching through cores suggests that the Chalk matrix has little potential for the attenuation of ammonium. Biodegradation appears to control the attenuation of phenol in the Chalk.
Disposal of Highly-active, Solid Radioactive Wastes Into Geological Formations
Author: B. A. R. TaitPublisher:
ISBN:
Category : Artificial groundwater recharge
Languages : en
Pages : 678
Book Description