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| Author | Pacheco, F.A.L.; Szocs, T. | ||||
| Title | “Dedolomitization reactions” driven by anthropogenic activity on loessy sediments, SW Hungary | Type | Journal Article | ||
| Year | 2006 | Publication | Applied Geochemistry | Abbreviated Journal | |
| Volume | 21 | Issue | 4 | Pages | 614-631 |
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| Abstract | In the Szigetvár area, SW Hungary, shallow groundwaters draining upper Pleistocene loess and Holocene sediments are considerably contaminated by domestic effluents and leachates of farmland fertilizers. The loess contains calcite and dolomite, but gypsum was not recognized in these sediments. The anthropogenic inputs contain significant amounts of Ca and SO4. The Ca from these anthropogenic inputs is promoting calcite growth, with concomitant consumption of carbonate alkalinity, undersaturation of the system with respect to dolomite, and dolomite dissolution; in brief, is driving “dedolomitization reactions”. Geochemical arguments supporting the occurrence of “dedolomitization reactions” in the area are provided by the results of mass balance and thermodynamic analyses. The mass balances predicted the weather sequence dolomite\textgreatercalcite\textgreaterplagioclase\textgreaterK-feldspar, at odds with widely accepted sequences of weatherability where calcite is the first mineral in the weathering sequence. The exchange between calcite and dolomite can be a side effect of “dedolomitization reactions” because they cause precipitation of calcite. The thermodynamic prerequisites for “dedolomitization reactions” are satisfied by most local groundwaters (70%) since they are supersaturated (or in equilibrium) with respect to calcite, undersaturated (or in equilibrium) with respect to dolomite, and undersaturated with respect to gypsum. The Ca vs. SO4 and Mg vs. SO4 trends are also compatible with homologous trends resulting from “dedolomitization reactions”. | ||||
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| ISSN | 0883-2927 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | THL @ christoph.kuells @ Pacheco2006 | Serial | 35 | ||
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| Author | Yeh, M.; Lin, Y.; Chang, L. | ||||
| Title | Designing an optimal multivariate geostatistical groundwater quality monitoring network using factorial kriging and genetic algorithms | Type | Journal Article | ||
| Year | 2006 | Publication | Environ. Geol. | Abbreviated Journal | |
| Volume | 50 | Issue | 1 | Pages | 101-121 |
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| Publisher | Springer Science and Business Media LLC | Place of Publication |
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| Notes | Approved | no | |||
| Call Number | CUT @ phaedon.kyriakidis @ Yeh2006 | Serial | 144 | ||
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| Author | Garcia*, L.A.; Shigidi, A. | ||||
| Title | Using neural networks for parameter estimation in ground water | Type | Journal Article | ||
| Year | 2006 | Publication | Hydrogeol. J. | Abbreviated Journal | |
| Volume | 318 | Issue | Pages | 215-231 | |
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| Notes | Approved | no | |||
| Call Number | CUT @ phaedon.kyriakidis @ Garcia2006 | Serial | 149 | ||
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| Author | de Paz, J.-M.; Sánchez, J.; Visconti, F. | ||||
| Title | Combined use of GIS and environmental indicators for assessment of chemical, physical and biological soil degradation in a Spanish Mediterranean region | Type | Journal Article | ||
| Year | 2006 | Publication | Journal of environmental management | Abbreviated Journal | |
| Volume | 79 | Issue | 2 | Pages | 150-162 |
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| Abstract | Soil is one of the main non-renewable natural resources in the world. In the Valencian Community (Mediterranean coast of Spain), it is especially important because agriculture and forest biomass exploitation are two of the main economic activities in the region. More than 44% of the total area is under agriculture and 52% is forested. The frequently arid or semi-arid climate with rainfall concentrated in few events, usually in the autumn and spring, scarcity of vegetation cover, and eroded and shallow soils in several areas lead to soil degradation processes. These processes, mainly water erosion and salinization, can be intense in many locations within the Valencian Community. Evaluation of soil degradation on a regional scale is important because degradation is incompatible with sustainable development. Policy makers involved in land use planning require tools to evaluate soil degradation so they can go on to develop measures aimed at protecting and conserving soils. In this study, a methodology to evaluate physical, chemical and biological soil degradation in a GIS-based approach was developed for the Valencian Community on a 1/200,000 scale. The information used in this study was obtained from two different sources: (i) a soil survey with more than 850 soil profiles sampled within the Valencian Community, and (ii) the environmental information implemented in the Geo-scientific map of the Valencian Community digitised on an Arc/Info GIS. Maps of physical, chemical and biological soil degradation in the Valencian Community on a 1/200,000 scale were obtained using the methodology devised. These maps can be used to make a cost-effective evaluation of soil degradation on a regional scale. Around 29% of the area corresponding to the Valencian Community is affected by high to very high physical soil degradation, 36% by high to very high biological degradation, and 6% by high to very high chemical degradation. It is, therefore, necessary to draw up legislation and to establish the policy framework for actions focused on preventing soil degradation and conserving its productive potential. |
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| Publisher | Elsevier | Place of Publication |
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| ISSN | 0301-4797 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | THL @ luqianxue.zhang @ dePaz2006 | Serial | 47 | ||
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| Author | Demirak, A.; Balci, A.; Karaoğlu, H.; Tosmur, B. | ||||
| Title | Chemical characteristics of rain water at an urban site of south western Turkey | Type | Journal Article | ||
| Year | 2006 | Publication | Environmental monitoring and assessment | Abbreviated Journal | |
| Volume | 123 | Issue | 1-3 | Pages | 271-283 |
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| Publisher | Springer | Place of Publication |
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| ISSN | 0167-6369 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | THL @ luqianxue.zhang @ Demirak2006 | Serial | 56 | ||
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