Records |
Author |
Brutsaert, W. |
Title |
Global land surface evaporation trend during the past half century: Corroboration by Clausius-Clapeyron scaling |
Type |
Journal Article |
Year |
2017 |
Publication |
Advances in Water Resources |
Abbreviated Journal |
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Volume |
106 |
Issue |
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Pages |
3-5 |
Keywords |
Evaporation, Climate change, Evaporation trend |
Abstract |
Analyses of satellite data mainly over the world’s ocean surfaces have shown that during 1986–2006 global average values of atmospheric water vapor, precipitation and evaporation have increased at a relative rate of 0.0013a−1; this is roughly in accordance with the Clausius-Clapeyron equation for the average temperature trend during this period, and amounts to 0.065K−1 at the average temperature of T=14∘C. Application of this concept over the world’s land surfaces yields an average global evaporation trend during the past half century of around 0.4 to 0.5 mma−2; this confirms the values obtained in previous studies with totally different methods. |
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0309-1708 |
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Tribute to Professor Garrison Sposito: An Exceptional Hydrologist and Geochemist |
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no |
Call Number |
THL @ christoph.kuells @ Brutsaert20173 |
Serial |
287 |
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Author |
Schwiede, M.; Duijnisveld, W.H.M.; Böttcher, J. |
Title |
Investigation of processes leading to nitrate enrichment in soils in the Kalahari Region, Botswana |
Type |
Journal Article |
Year |
2005 |
Publication |
Physics and Chemistry of the Earth, Parts A/B/C |
Abbreviated Journal |
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Volume |
30 |
Issue |
11 |
Pages |
712-716 |
Keywords |
Nitrate, Arenosol soils, Semi-arid, Kalahari, Cattle, Chloride, Travel time |
Abstract |
In Southern Africa elevated nitrate concentrations are observed in mostly uninhabited semi-arid areas. In the Kalahari of Botswana groundwater locally exhibits concentrations up to 600mg/l. It is assumed, that nitrate found in the groundwater originates mainly from nitrogen input and transformations in the soils. Our investigations in the Kalahari between Serowe and Orapa show that cattle raising is an important source for enhanced nitrate concentrations in the soils (Arenosols). But also in termite mounds very high nitrate stocks were found, and under natural vegetation (acacia trees and shrubs) nitrate concentrations were mostly unexpectedly high. This nitrate enrichment in the soils poses a serious threat to the groundwater quality. However, calculated soil water age distributions in the unsaturated zone clearly show that today’s nitrate pollution of the groundwater below the investigation area could originate from natural sources, but cannot be caused by the current land use for cattle raising. |
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1474-7065 |
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Integrated Water Resources Management (IWRM) and the Millennium Development Goals: Managing Water for Peace and Prosperity |
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no |
Call Number |
THL @ christoph.kuells @ Schwiede2005712 |
Serial |
276 |
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Author |
United Nations |
Title |
Stampriet Transboundary Aquifer System Assessment: governance of Groundwater resources in Transboundary Aquifers (GGRETA), phase 1: technical report |
Type |
Miscellaneous |
Year |
1998 |
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Incl. bibl. |
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no |
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THL @ christoph.kuells @ |
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286 |
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Author |
Hamidian, A.; Ghorbani, M.; Abdolshahnejad, M.; Abdolshahnejad, A. |
Title |
RETRACTED: Qanat, Traditional Eco-technology for Irrigation and Water Management |
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Journal Article |
Year |
2015 |
Publication |
Agriculture and Agricultural Science Procedia |
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4 |
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Pages |
119-125 |
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Abstract |
This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/about/our-business/policies/article-withdrawal). This article has been retracted at the request of Editor. The authors have plagiarized part of a book Veins of Desert, by Semsar Yazdi, Ali Asghar; Labbaf Khaneiki, Majid published by UNESCO-ICQHS, 2010 pages 2, 3, 5, 6, 7, 11, 44, 156, 157 and 158. One of the conditions of submission of a paper for publication is that authors declare explicitly that their work is original and has not appeared in a publication elsewhere. Re-use of any data should be appropriately cited. |
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2210-7843 |
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Efficient irrigation management and its effects in urban and rural landscapes |
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no |
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THL @ christoph.kuells @ Hamidian2015119 |
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252 |
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Author |
Kirchner, J.W. |
Title |
Mixing Models With Multiple, Overlapping, or Incomplete End-Members, Quantified Using Time Series of a Single Tracer |
Type |
Journal Article |
Year |
2023 |
Publication |
Geophysical Research Letters |
Abbreviated Journal |
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Volume |
50 |
Issue |
12 |
Pages |
2023 |
Keywords |
end-member mixing, tracers, stable isotopes, mixing models, EMMA, EEMMA |
Abstract |
Abstract Mixing models are used throughout earth and environmental science to quantify the relative contributions of sources to mixtures, based on chemical or isotopic tracers. Often, however, some end-members are missing or their tracer distributions overlap, precluding the use of conventional mixing models. Here I show how these constraints can be overcome by exploiting the information contained in tracer time-series fluctuations. This approach, ensemble end-member mixing analysis (EEMMA), can potentially quantify many sources using a single tracer, even if their mean concentrations are indistinguishable. EEMMA can also quantify source contributions when some sources are unknown, and even infer the tracer time series of a missing source. Benchmark tests with synthetic data verify the reliability of this approach, thus expanding the range of mixing models that can be quantified using tracer time series. An R script is provided for the necessary calculations, including error propagation. |
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AGU |
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English |
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English |
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e2023GL104147 2023GL104147 |
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no |
Call Number |
THL @ christoph.kuells @ https://doi.org/10.1029/2023GL104147 |
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291 |
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Author |
Kamash, Z. |
Title |
Irrigation technology, society and environment in the Roman Near East |
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Journal Article |
Year |
2012 |
Publication |
Journal of Arid Environments |
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Volume |
86 |
Issue |
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Pages |
65-74 |
Keywords |
Army, Urbanism, Qanats, Dams, Field systems, Irrigation channels |
Abstract |
This paper uses a multi-faceted approach to understand the use and distribution of different irrigation technologies in the Roman Near East (63 BC – AD 636), looking at the ways in which social and environmental factors affected the implementation of those irrigation technologies. It is argued that no single factor can fully explain how irrigation technologies were used across time and space in this region. Instead, choices in irrigation technology seem to have been governed by a complex nexus of both social and environmental factors. |
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0140-1963 |
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Ancient Agriculture in the Middle East |
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no |
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THL @ christoph.kuells @ Kamash201265 |
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259 |
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Author |
Rajfur, M.; Kłos, A.; Wacławek, M. |
Title |
Sorption properties of algae Spirogyra sp. and their use for determination of heavy metal ions concentrations in surface water |
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Journal Article |
Year |
2010 |
Publication |
Bioelectrochemistry |
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Volume |
80 |
Issue |
1 |
Pages |
81-86 |
Keywords |
Biomonitoring, Heavy metal ions, Algae sp., Sorption kinetics, Langmuir isotherm |
Abstract |
Kinetics of heavy-metal ions sorption by alga Spirogyra sp. was evaluated experimentally in the laboratory, using both the static and the dynamic approach. The metal ions – Mn2+, Cu2+, Zn2+ and Cd2+ – were sorbed from aqueous solutions of their salts. The static experiments showed that the sorption equilibria were attained in 30min, with 90-95% of metal ions sorbed in first 10min of each process. The sorption equilibria were approximated with the Langmuir isotherm model. The algae sorbed each heavy metal ions proportionally to the amount of this metal ions in solution. The experiments confirmed that after 30min of exposition to contaminated water, the concentration of heavy metal ions in the algae, which initially contained small amounts of these metal ions, increased proportionally to the concentration of metal ions in solution. The presented results can be used for elaboration of a method for classification of surface waters that complies with the legal regulations. |
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1567-5394 |
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A Selection of Papers presented at the 4th International Workshop on Surface Modification for Chemical and Biochemical Sensing (SMCBS 2009) |
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no |
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THL @ christoph.kuells @ Rajfur201081 |
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283 |
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Author |
Doulgeris, C.; Tziritis, E.; Pisinaras, V.; Panagopoulos, A.; Külls, C. |
Title |
Prediction of seawater intrusion to coastal aquifers based on non-dimensional diagrams |
Type |
Conference Article |
Year |
2020 |
Publication |
EGU Geophysical Abstracts |
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4073 |
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THL @ christoph.kuells @ Doulgeris2020prediction |
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41 |
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Author |
Leibundgut, C.; Maloszewski, P.; Külls, C. |
Title |
Tracers in Hydrology |
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Book Whole |
Year |
2009 |
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1. Ed. |
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John Wiley & Sons, Ltd |
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THL @ christoph.kuells @ Leibundgut2009tracers |
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37 |
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Author |
Külls, C. |
Title |
Groundwater of the North-Western Kalahari, Namibia: estimation of recharge and quantification of the flow system |
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Book Whole |
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2001 |
Publication |
Hydrogeologie und Umwelt |
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Doctoral thesis |
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Hydrogeologie und Umwelt |
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THL @ christoph.kuells @ Kuells2003groundwater |
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38 |
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