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Author (up) Benito, G.; Rohde, R.; Seely, M.; Külls, C.; Dahan, O.; Enzel, Y.; Todd, S.; Botero, B.; Morin, E.; Grodek, T.
Title Management of alluvial aquifers in two southern African ephemeral rivers: implications for IWRM Type Journal Article
Year 2010 Publication Water Resources Management Abbreviated Journal
Volume 24 Issue 4 Pages 641-667
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Publisher Springer Netherlands Place of Publication Editor
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Notes Approved no
Call Number THL @ christoph.kuells @ Benito2010management Serial 25
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Author (up) Borrego-Alonso, D.; Quintana-Arnés, B.; Lozano, J.C.
Title Natural radionuclides behaviour in drinking groundwaters from Castilla y León (Spain); radiological implications Type Journal Article
Year 2023 Publication Water Research Abbreviated Journal
Volume 245 Issue Pages 120616
Keywords Drinking water, Environmental monitoring, Natural radioactivity, Public health, Radiological characterisation
Abstract Since the coming into force of the European Council Directive 51/2013 EURATOM and its transposition into the Spanish legislation, the presence of radioactive substances in drinking waters must be kept under surveillance to ensure that the health protection requirements are met. Driven by this regulatory framework, in an attempt to know the starting point from which to design surveillance plans, the groundwaters intended for human consumption of Castilla y León (Spain) have been radiologically characterised by using both low-level γ-ray and α-particle spectrometry to determine the activity concentration of the natural radionuclides needed to account for the indicative dose estimation. This extensive research has comprised the radiological characterisation of more than 400 drinking water samples from one of the European Union’s largest regions. Furthermore, the gross α and gross β activities have been analysed. Results showed a high geographical variability that can be related to the hydrogeological formations where the groundwaters come from. The uranium isotopes, 234U and 238U, are the main radionuclides present in the analysed drinking waters reaching values up to 2000 mBq/L, in the southwestern and western of Castilla y León, where U-rich minerals are part of the host rock. High 210Pb and 226,228Ra occurrences are found in the low permeability igneous and metasedimentary hydrogeological formations of Salamanca province. From a public health protection point of view, 4.4% of the total drinking water samples from intakes exceeded the Indicative Dose parametric value of 0.1 mSv, which is a not negligible number of samples, being very likely related to granitic and metamorphosed host rock under specific local conditions. This fact highlights the need for research and consideration of special surveillance of the groundwaters from these areas.
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ISSN 0043-1354 ISBN Medium
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Call Number THL @ christoph.kuells @ borrego-alonso_natural_2023 Serial 157
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Author (up) Dahan, O.; Tatarsky, B.; Enzel, Y.; Külls, C.; Seely, M.; Benito, G.
Title Dynamics of flood water infiltration and ground water recharge in hyperarid desert Type Journal Article
Year 2008 Publication Groundwater Abbreviated Journal
Volume 46 Issue 3 Pages 450-461
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Publisher Blackwell Publishing Inc Malden, USA Place of Publication Editor
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Notes Approved no
Call Number THL @ christoph.kuells @ Dahan2008dynamics Serial 27
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Author (up) Demuth, S.; Külls, C.
Title Probability analysis and regional aspects of droughts in southern Germany Type Journal Article
Year 1997 Publication Sustainability of Water Resources under Increasing Uncertainty Abbreviated Journal
Volume Issue 240 Pages 97
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Publisher Iahs Place of Publication Editor
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Call Number THL @ christoph.kuells @ Demuth1997probability Serial 35
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Author (up) Eliades, M.; Bruggeman, A.; Djuma, H.; Christofi, C.; Kuells, C.
Title Quantifying Evapotranspiration and Drainage Losses in a Semi-Arid Nectarine (Prunus persica var. nucipersica) Field with a Dynamic Crop Coefficient (Kc) Derived from Leaf Area Index Measurements Type Journal Article
Year 2022 Publication Water Abbreviated Journal
Volume 14 Issue 5 Pages
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Abstract Quantifying evapotranspiration and drainage losses is essential for improving irrigation efficiency. The FAO-56 is the most popular method for computing crop evapotranspiration. There is, however, a need for locally derived crop coefficients (Kc) with a high temporal resolution to reduce errors in the water balance. The aim of this paper is to introduce a dynamic Kc approach, based on Leaf Area Index (LAI) observations, for improving water balance computations. Soil moisture and meteorological data were collected in a terraced nectarine (Prunus persica var. nucipersica) orchard in Cyprus, from 22 March 2019 to 18 November 2021. The Kc was derived as a function of the canopy cover fraction (c), from biweekly in situ LAI measurements. The use of a dynamic Kc resulted in Kc estimates with a bias of 17 mm and a mean absolute error of 0.8 mm. Evapotranspiration (ET) ranged from 41% of the rainfall (P) and irrigation (I) in the wet year (2019) to 57% of P + I in the dry year (2021). Drainage losses from irrigation (DR_I) were 44% of the total irrigation. The irrigation efficiency in the nectarine field could be improved by reducing irrigation amounts and increasing the irrigation frequency. Future studies should focus on improving the dynamic Kc approach by linking LAI field observations with remote sensing observations and by adding ground cover observations.
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ISSN 2073-4441 ISBN Medium
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Notes Approved no
Call Number THL @ christoph.kuells @ Marinos2022 Serial 82
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