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  • 1
    Electronic Resource
    Electronic Resource
    Evaluating Natural Attenuation of Groundwater Pollution from a Coal-Carbonisation Plant: Developing a Local-Scale Model using MODFLOW, MODTMR and MT3D (2000)
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 14 (2000), S. 0 
    Details
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: The effluent from a former coal-carbonisation plant in Nottinghamshire has contaminated the underlying aquifer with ammonium and organic compounds. In terms of flow and contamination, the site has experienced a complex history. MODFLOW has been used to unravel the past flow directions and to provide a basis for solute transport and biodegradation modelling. The modelling has shown that a fine grid is required to represent local flows to prevent incorrect site interpretations. A telescopic mesh technique was essential for this study to enable the site features to be adequately represented while including the regional hydrogeological influences. The influence of grid size to numerical dispersion was investigated for the MT3D computer program. The ‘method of characteristics’and ‘hybrid method of characteristics’modules of MT3D were found to be relatively free from numerical dispersion for all the grid sizes investigated. However, the ‘modified method of characteristics’suffered extensively, and a linear relationship between grid size and numerical dispersion was demonstrated for this complex model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1747-6593.2000.tb00288.x
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  • 2
    Electronic Resource
    Electronic Resource
    Growth-inhibiting Substances in Xylem Sap (1963)
    [s.l.] : Nature Publishing Group
    Nature 197 (1963), S. 620-621 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Xylem sap was collected from woody shoots using a method previously described2, which allows quantities of up to 100 ml. to be extracted readily. To examine extracted sap for growth-inhibiting substances a volume of this material was first acidified to approximately pTi 2-0 with dilute sulphuric ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/197620b0
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  • 3
    Electronic Resource
    Electronic Resource
    Fruit-Setting of Apples using Gibberellic Acid (1960)
    [s.l.] : Nature Publishing Group
    Nature 188 (1960), S. 681-682 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Before treatment, petals, stamens and style of flowers on small branches were removed at the pink stage with a sharp blade. Except with Red Jersey at least 80 flowers per treatment were used. Paste was then smeared on the cut surface and around the inside of each receptacle. On Sturmer, additions ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/188681b0
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  • 4
    Electronic Resource
    Electronic Resource
    Combined Hormone-Fungicide Sprays for Control of Botrytis Fruit-Rot in Glasshouse Tomatoes (1953)
    [s.l.] : Nature Publishing Group
    Nature 172 (1953), S. 351-351 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In the process of fruit-set, different parts of the corolla of the tomato flower are for a period shielded from spray-at first, part of the under petal-surface by the calyx, and later, after wilting occurs, the inner petal-surface. Because a normal fungicidal programme is not related to truss ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/172351a0
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  • 5
    Electronic Resource
    Electronic Resource
    Abscisic-acid content of xylem sap (1973)
    Springer
    Planta 109 (1973), S. 95-98 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Abscisic acid (ABA) has been identified by gas chromatography in xylem sap of the woody species apple, peach, willow, sugar maple, Tecomaria capensis and Actinidia chinensis. The amounts of ABA present in each species are markedly different, varying from 9 to over 1000 ng/100 ml of sap.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00385455
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  • 6
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    Is the water still hot? Sustainability and the thermal springs at Bath, England (2002)
    In:  Geological Society Special Publication 193: 15-40.
    Details
    Publication Date: 2002-01-01
    Description: The hot springs at Bath are the largest natural thermal source in Britain. Sustainable use of the waters for a spa requires maintenance of their temperature and flow rate. Together with smaller springs at Hotwells, Bristol, they form the outflow from a regional thermal aquifer that occurs where the Carboniferous Limestone is buried at depths 〉 2.7 km in the Bristol-Bath structural basin. The aquifer is recharged via limestone outcrops forming the south and west portions of the basin rim. Current knowledge of the basin's structure is reviewed, and important uncertainties identified concerning the hydrogeological role of thrust faults which may cut the limestone at depth. A simple numerical model is used to determine the possible influence of thrusts upon groundwater flow within the thermal aquifer. Comparison of the modelled flow patterns with geochemical data and structure contours eliminates the hypothesis that thrusts completely disrupt the continuity of the aquifer. The most successful model is used to simulate the possible impact of dewatering by large quarries at the limestone outcrops north and south of Bath. Substantial reductions in modelled flow at Bath result from proposed dewatering in the eastern Mendips, although the steady-state approach adopted has severe limitations in that it does not take account of the incremental staging of actual dewatering, nor allow for partial restitution of groundwater levels. The geological uncertainties highlighted by the modelling could be addressed by future research into the effect of thrusts on the continuity of the Carboniferous Limestone. More refined modelling to predict the timing of possible impacts of quarry dewatering will require measurements of the storativity of the thermal aquifer.
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  • 7
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    A probabilistic management system to optimize the use of urban groundwater (2002)
    In:  Geological Society Special Publication 193: 265-276.
    Details
    Publication Date: 2002-01-01
    Description: Urban groundwater is an underused resource mostly due to the perceived risk of contamination; conversely rural groundwater is being over-exploited. To enable urban groundwater to be utilized effectively a probabilistic water management tool has been developed. The management tool combines three models to identify the best use for water pumped from a user-defined location. The probabilistic catchment zone model determines the spatial distribution of the probability that water originating from a given point in the aquifer reaches the pumping well. The land-use model then identifies the potential contaminant sources in this region from a large set of GIS-based coverages and databases. The contaminant source data are passed to a pollution risk model that calculates the probability distribution for the concentration of a contaminant at the pumped borehole. Initial model validation using contaminant concentrations from two sites shows the model fits the available field data. These case studies show there is risk from chlorinated solvents but little risk from the BTEX compounds.
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  • 8
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    Sustainable groundwater development (2002)
    In:  Geological Society Special Publication 193: 1-14.
    Details
    Publication Date: 2002-01-01
    Description: Estimated annual water availability per person in 2025 is likely to result in at least 400f the world's 7.2 billion people facing serious problems with obtaining freshwater for agriculture, industry or human health (Gleick 2001). To meet present and future needs with the currently available surface and groundwater resources, while at the same time preserving terrestrial and aquatic ecosystems, will require a sustainable approach to managing water. This paper discusses the importance of groundwater resources in industrialized and developing countries, and the associated problems of over-abstraction and groundwater pollution, with the objective of defining sustainable groundwater development. It is concluded that sustainable groundwater development at global and local scales is achieved through the maintenance and protection of groundwater resources balanced against economic, environmental and human (social) benefits. This interpretation of sustainable groundwater development is incorporated into the methodologies currently emerging in Europe (the EU Water Framework Directive) and England and Wales (Catchment Abstraction Management Strategies). However, success in achieving future sustainable groundwater development will require a common understanding at the level of the individual based on information and education within a legislatory framework that promotes co-operation and self-responsibility.
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  • 9
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    Texture and anisotropy of low-interstitial 18 Pct Cr-2 Pct Mo ferritic stainless steel (1975)
    Springer
    Details
    Publication Date: 1975-12-01
    Print ISSN: 1073-5623
    Electronic ISSN: 1543-1940
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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  • 10
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    Formability of low-interstitial 18 pct Cr-2 pct Mo ferritic stainless steel (1974)
    Springer
    Details
    Publication Date: 1974-11-01
    Print ISSN: 1073-5623
    Electronic ISSN: 1543-1940
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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