| Records |
Author  |
Konapala, G.; Mishra, A.K.; Wada, Y.; Mann, M.E. |
| Title |
Climate change will affect global water availability through compounding changes in seasonal precipitation and evaporation |
Type |
Journal Article |
| Year |
2020 |
Publication |
Nature Communications |
Abbreviated Journal |
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| Volume |
11 |
Issue |
1 |
Pages |
3044 |
| Keywords |
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| Abstract |
Both seasonal and annual mean precipitation and evaporation influence patterns of water availability impacting society and ecosystems. Existing global climate studies rarely consider such patterns from non-parametric statistical standpoint. Here, we employ a non-parametric analysis framework to analyze seasonal hydroclimatic regimes by classifying global land regions into nine regimes using late 20th century precipitation means and seasonality. These regimes are used to assess implications for water availability due to concomitant changes in mean and seasonal precipitation and evaporation changes using CMIP5 model future climate projections. Out of 9 regimes, 4 show increased precipitation variation, while 5 show decreased evaporation variation coupled with increasing mean precipitation and evaporation. Increases in projected seasonal precipitation variation in already highly variable precipitation regimes gives rise to a pattern of “seasonally variable regimes becoming more variable”. Regimes with low seasonality in precipitation, instead, experience increased wet season precipitation. |
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English |
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2041-1723 |
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THL @ christoph.kuells @ Konapala2020 |
Serial |
284 |
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| Author |
Klock, H.; Külls, C.; Udluft, P. |
| Title |
Estimation of relative recharge values for the northern Kalahari catchment, Namibia |
Type |
Journal Article |
| Year |
2000 |
Publication |
Journal of African Earth Sciences |
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| Volume |
30 |
Issue |
4 |
Pages |
47-48 |
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THL @ christoph.kuells @ Klock2000estimation |
Serial |
33 |
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Klock, H.; Külls, C.; Udluft, P. |
| Title |
Quantification of Groundwater Recharge-Estimating recharge values using hydrochemical and geological data: A case study from the semiarid Kalahari catchment of northern Namibia |
Type |
Journal Article |
| Year |
2001 |
Publication |
IAHS Publications-Series of Proceedings and Reports-Intern Assoc Hydrological Sciences |
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| Volume |
269 |
Issue |
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Pages |
25-32 |
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Wallingford [Oxfordshire]: IAHS, 1981- |
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THL @ christoph.kuells @ Klock2001 |
Serial |
32 |
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| Author |
Klock, H.; Külls, C.; Udluft, P. |
| Title |
Estimating recharge values using hydrochemical and geological data: a case study from the |
Type |
Conference Article |
| Year |
2001 |
Publication |
Impact of Human Activity on Groundwater Dynamics: Proceedings of an International Symposium (Symposium S3) Held During the Sixth Scientific Assembly of the International Association of Hydrological Sciences (IAHS) at Maastricht, The Netherlands, from 18 t |
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Issue |
269 |
Pages |
25 |
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International Assn of Hydrological Sciences |
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THL @ christoph.kuells @ Klock2001estimating |
Serial |
60 |
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Klimkova, S.; Cernik, M.; Lacinova, L.; Filip, J.; Jancik, D.; Zboril, R. |
| Title |
Zero-valent iron nanoparticles in treatment of acid mine water from in situ uranium leaching |
Type |
Journal Article |
| Year |
2011 |
Publication |
Chemosphere |
Abbreviated Journal |
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| Volume |
82 |
Issue |
8 |
Pages |
1178-1184 |
| Keywords |
Acid mine water, Contaminant removal, Surface stabilizing shell, Water treatment, Zero-valent iron nanoparticles |
| Abstract |
Acid mine water from in situ chemical leaching of uranium (Straz pod Ralskem, Czech Republic) was treated in laboratory scale experiments by zero-valent iron nanoparticles (nZVI). For the first time, nZVI were applied for the treatment of the real acid water system containing the miscellaneous mixture of pollutants, where the various removal mechanisms occur simultaneously. Toxicity of the treated saline acid water is caused by major contaminants represented by aluminum and sulphates in a high concentration, as well as by microcontaminants like As, Be, Cd, Cr, Cu, Ni, U, V, and Zn. Laboratory batch experiments proved a significant decrease in concentrations of all the monitored pollutants due to an increase in pH and a decrease in oxidation–reduction potential related to an application of nZVI. The assumed mechanisms of contaminants removal include precipitation of cations in a lower oxidation state, precipitation caused by a simple pH increase and co-precipitation with the formed iron oxyhydroxides. The possibility to control the reaction kinetics through the nature of the surface stabilizing shell (polymer vs. FeO nanolayer) is discussed as an important practical aspect. |
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0045-6535 |
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no |
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THL @ christoph.kuells @ klimkova_zero-valent_2011 |
Serial |
196 |
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| Author |
Klaus, J.; Zehe, E.; Elsner, M.; Külls, C.; McDonnell, J.J. |
| Title |
Macropore flow of old water revisited: experimental insights from a tile-drained hillslope |
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Journal Article |
| Year |
2013 |
Publication |
Hydrology and Earth System Sciences |
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17 |
Issue |
1 |
Pages |
103 |
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Copernicus GmbH |
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THL @ christoph.kuells @ Klaus2013macropore |
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23 |
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| Author |
Klaus, J.; Külls, C.; Dahan, O. |
| Title |
Evaluating the recharge mechanism of the Lower Kuiseb Dune area using mixing cell modeling and residence time data |
Type |
Journal Article |
| Year |
2008 |
Publication |
Journal of Hydrology |
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358 |
Issue |
3-4 |
Pages |
304-316 |
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Elsevier |
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THL @ christoph.kuells @ Klaus2008evaluating |
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28 |
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| Author |
Klaus, J.; Külls, C. |
| Title |
Integrating residence time data in mixing cell modeling-Application to the Lower Kuiseb Dune area |
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Conference Article |
| Year |
2009 |
Publication |
EGU Geophysical Abstracts |
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Issue |
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Pages |
11026 |
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THL @ christoph.kuells @ Klaus2009integrating |
Serial |
54 |
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| Author |
Khoury, H.N.; salameh, E.M.; Clark, I.D. |
| Title |
Mineralogy and origin of surficial uranium deposits hosted in travertine and calcrete from central Jordan |
Type |
Journal Article |
| Year |
2014 |
Publication |
Applied Geochemistry |
Abbreviated Journal |
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43 |
Issue |
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Pages |
49-65 |
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| Abstract |
Secondary uranium encrustations are hosted in thick travertine and calcrete deposits of Pleistocene–Recent age in central Jordan. The central Jordan varicolored marble and travertine are equivalent to the active metamorphic area in Maqarin, north Jordan. More than 100 samples were collected from the outcrops of the varicolored marble, travertine, calcrete, and the yellow uranium encrustations. The secondary yellow encrustations are mainly composed of uranyl vanadate complexes. Tyuyamunite Ca(UO2)2V25+O8·3(H2O)–strelkinite Na2(UO2)2V2O8·6(H2O) solid solution series are the major components and their composition reflects changes in the Ca/Na ratio in solution. Potentially, new vanadium free calcium uranate phases (restricted to the varicolored marble) were identified with CaO:UO3 ratios different from the known mineral vorlanite (CaU6+)O4. Carbon and oxygen isotope data from calcite in the varicolored marble are characterized by Rayleigh-type enrichment in light isotopes associated with release of 13C and 18O enriched CO2 by high temperature decarbonation during combustion of the bituminous marl. Stable isotope results from uranium hosted travertine and calcrete varieties exhibit a wide range in isotopic values, between decarbonated and normal sedimentary carbonate rocks. The depleted δ13C and δ18O values in the travertine are related to the kinetic reaction of atmospheric CO2 with hyperalkaline Ca(OH)2 water. The gradual enrichment of δ13C and δ18O values in the calcrete towards equilibrium with the surrounding environment is related to continuous evaporation during seasonal dry periods. Uranium mineralization in central Jordan resulted from the interplay of tectonic, climatic, hydrologic, and depositional events. The large distribution of surficial uranium occurrences hosted in travertine and calcrete deposits is related to the artesian ascending groundwater that formed extensive lakes along NNW–SSE trending depressions. Fresh groundwater moved upward through the highly fractured phosphate, bituminous marl and varicolored marble to form unusual highly alkaline water (hydroxide–sulfate type) enriched with sensitive redox elements among which were U and V. |
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0883-2927 |
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THL @ christoph.kuells @ khoury_mineralogy_2014 |
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121 |
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| Author |
Kharazi, P.; khazaeli, E.A.; Heshmatpour, A. |
| Title |
Delineation of suitable sites for groundwater dams in the semi-arid environment in the northeast of Iran using GIS-based decision-making method |
Type |
Journal Article |
| Year |
2021 |
Publication |
Groundwater for Sustainable Development |
Abbreviated Journal |
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15 |
Issue |
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Pages |
100657 |
| Keywords |
Subsurface dam, Hybrid decision-making method, Geographic information system, Analytical hierarchy process, EDAS, TOPSIS1 |
| Abstract |
Competing commercial demands on water resources need to be balanced as the world’s population rises. Generally, groundwater is raised by subsurface dams. In this paper, the geographic information system (GIS) software and a decision-making method were applied. As the first step, the limitations that affect the establishment of the subsurface dam were identified using eliminating criteria by the Boolean logic. Regarding the second step, the most appropriate axis was determined for subsurface dam construction in each of the limits. The analytical hierarchy process (AHP) was applied according to the evaluation criteria in this study. The aim of using AHP was to weigh and prioritize the criteria of the groundwater dam for recognizing appropriate sites. Among various places and regarding the subsurface dam construction, AHP was conducted using a hierarchy process for finding the most suitable sites in the third stage of the decision-making method. Finally, among the ten appropriate sites, cross comparison was drawn by using Decision Expert (DEX), Evaluation based on Distance from Average Solution (EDAS), and Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS). Compared together (as a process of decision-making), DEX, TOPSIS, and EDAS methods assisted in ranking the most appropriate sites in the final step of subsurface dam pre-selection. A and C axes obtained scores between 1 and 2, among 10 axes according to the numerically ranked locations. Regarding the water shortage issue and better management of the underground water at certain levels, the findings of this study could be useful for the residents of Kajbid-Balaqly Watershed in the dry season. Further, water managers can use the above-mentioned methods for their decisions regarding the proper subsurface dam establishment. |
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2352-801x |
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THL @ christoph.kuells @ Kharazi2021100657 |
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250 |
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