Records |
Author |
Dutova, E.M.; Nikitenkov, A.N.; Pokrovskiy, V.D.; Banks, D.; Frengstad, B.S.; Parnachev, V.P. |
Title |
Modelling of the dissolution and reprecipitation of uranium under oxidising conditions in the zone of shallow groundwater circulation |
Type |
Journal Article |
Year |
2017 |
Publication |
Journal of Environmental Radioactivity |
Abbreviated Journal |
|
Volume |
178-179 |
Issue |
|
Pages |
63-76 |
Keywords |
Groundwater, Hydrochemical modelling, Mineralisation, Natural uranium, Ore, Solubility |
Abstract |
Generic hydrochemical modelling of a grantoid-groundwater system, using the Russian software “HydroGeo”, has been carried out with an emphasis on simulating the accumulation of uranium in the aqueous phase. The baseline model run simulates shallow granitoid aquifers (U content 5 ppm) under conditions broadly representative of southern Norway and southwestern Siberia: i.e. temperature 10 °C, equilibrated with a soil gas partial CO2 pressure (PCO2, open system) of 10−2.5 atm. and a mildly oxidising redox environment (Eh = +50 mV). Modelling indicates that aqueous uranium accumulates in parallel with total dissolved solids (or groundwater mineralisation M – regarded as an indicator of degree of hydrochemical evolution), accumulating most rapidly when M = 550–1000 mg L−1. Accumulation slows at the onset of saturation and precipitation of secondary uranium minerals at M = c. 1000 mg L−1 (which, under baseline modelling conditions, also corresponds approximately to calcite saturation and transition to Na-HCO3 hydrofacies). The secondary minerals are typically “black” uranium oxides of mixed oxidation state (e.g. U3O7 and U4O9). For rock U content of 5–50 ppm, it is possible to generate a wide variety of aqueous uranium concentrations, up to a maximum of just over 1 mg L−1, but with typical concentrations of up to 10 μg L−1 for modest degrees of hydrochemical maturity (as indicated by M). These observations correspond extremely well with real groundwater analyses from the Altai-Sayan region of Russia and Norwegian crystalline bedrock aquifers. The timing (with respect to M) and degree of aqueous uranium accumulation are also sensitive to Eh (greater mobilisation at higher Eh), uranium content of rocks (aqueous concentration increases as rock content increases) and PCO2 (low PCO2 favours higher pH, rapid accumulation of aqueous U and earlier saturation with respect to uranium minerals). |
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Summary Language |
|
Original Title |
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0265-931x |
ISBN |
|
Medium |
|
Area |
|
Expedition |
|
Conference |
|
Notes |
|
Approved |
no |
Call Number |
THL @ christoph.kuells @ dutova_modelling_2017 |
Serial |
114 |
Permanent link to this record |
|
|
|
Author |
Kamash, Z. |
Title |
Irrigation technology, society and environment in the Roman Near East |
Type |
Journal Article |
Year |
2012 |
Publication |
Journal of Arid Environments |
Abbreviated Journal |
|
Volume |
86 |
Issue |
|
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. |
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Summary Language |
|
Original Title |
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0140-1963 |
ISBN |
|
Medium |
|
Area |
|
Expedition |
|
Conference |
|
Notes |
Ancient Agriculture in the Middle East |
Approved |
no |
Call Number |
THL @ christoph.kuells @ Kamash201265 |
Serial |
259 |
Permanent link to this record |
|
|
|
Author |
Külls, C.; Schwarz, O. |
Title |
Grundwasseranreicherung in den Waldbeständen der Teninger Allmend bei Freiburg im Breisgau |
Type |
Book Chapter |
Year |
2000 |
Publication |
Beiträge zur Physischen Geographie |
Abbreviated Journal |
|
Volume |
|
Issue |
|
Pages |
67 - 78 |
Keywords |
|
Abstract |
|
Address |
|
Corporate Author |
Fachbereich Geowissenschaften der Johann Wolfgang Goethe-Universität Frankfurt am Main |
Thesis |
|
Publisher |
Werner-F. Bär |
Place of Publication |
Frankfurt am Main |
Editor |
|
Language |
|
Summary Language |
|
Original Title |
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
|
ISBN |
|
Medium |
|
Area |
|
Expedition |
|
Conference |
|
Notes |
|
Approved |
no |
Call Number |
THL @ christoph.kuells @ |
Serial |
72 |
Permanent link to this record |
|
|
|
Author |
Külls, C. |
Title |
Rekonstruktion hydrologischer Extreme in der Namibwüste |
Type |
Journal Article |
Year |
2011 |
Publication |
Berichte der naturforschenden Gesellschaft zu Freiburg im Breisgau |
Abbreviated Journal |
|
Volume |
|
Issue |
101 |
Pages |
69-81 |
Keywords |
|
Abstract |
|
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Summary Language |
|
Original Title |
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
|
ISBN |
|
Medium |
|
Area |
|
Expedition |
|
Conference |
|
Notes |
|
Approved |
no |
Call Number |
THL @ christoph.kuells @ |
Serial |
71 |
Permanent link to this record |
|
|
|
Author |
Shams, A. |
Title |
A rediscovered-new ‘Qanat’ system in the High Mountains of Sinai Peninsula, with Levantine reflections |
Type |
Journal Article |
Year |
2014 |
Publication |
Journal of Arid Environments |
Abbreviated Journal |
|
Volume |
110 |
Issue |
|
Pages |
69-74 |
Keywords |
Foggara, Irrigation, Levant, Qanat, Sinai Peninsula |
Abstract |
Since the Achaemenid Empire in 532–332 BCE, the ‘Qanat’ became the central irrigation system in the arid and semi-arid lands. Several terms are used for ‘Qanat’ in different regions, including the Karez, Qanat, Falaj type Daudi, Qanat Romani, Fuqara (Foggara), or Khettara as known in Central Asia, Persia, Southeast Arabia, Levant, North Africa, or Morocco respectively. Typically, the ground, spring or surface water (i.e. seasonal floods or river-fed) sources feed similar irrigation system. Based on thirteen years of extensive survey and analysis work (i.e. Sinai Peninsula Research 2000–2013 CE), this paper presents a rediscovered-new Qanat system in the High Mountains of Sinai Peninsula (i.e. UNESCO World Heritage Site ‘WHS’ no. 954) under chronological open question with Levantine reflections. In 1970s CE, the present Sinaitic site of Farsh Abu A’lwan or the anciently known Farsh Shamma’a was archaeologically surveyed without a direct reference to the Qanat system in-situ. Scientifically, it is an argumentative and unique Qanat system in terms of chronology, location (region), site (local-setting), water source, size and household utility. It is the only discovered ‘Qanat’ across the Sinai, connecting the Near East and North Africa. |
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Summary Language |
|
Original Title |
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0140-1963 |
ISBN |
|
Medium |
|
Area |
|
Expedition |
|
Conference |
|
Notes |
|
Approved |
no |
Call Number |
THL @ christoph.kuells @ Shams201469 |
Serial |
248 |
Permanent link to this record |