| Records |
| Author |
Christofi, C.; Bruggeman, A.; Külls, C.; Constantinou, C. |
| Title |
Hydrochemical evolution of groundwater in gabbro of the Troodos Fractured Aquifer. A comprehensive approach |
Type |
Journal Article |
| Year |
2020 |
Publication |
Applied Geochemistry |
Abbreviated Journal |
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| Volume |
114 |
Issue  |
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Pages |
104524 |
| Keywords |
geochemistry |
| Abstract |
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| Address |
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Thesis |
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| Publisher |
Pergamon |
Place of Publication |
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Editor |
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| Language |
English |
Summary Language |
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Original Title |
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| Notes |
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Approved |
no |
| Call Number |
THL @ christoph.kuells @ Christofi2020hydrochemical |
Serial |
13 |
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| Author |
Christofi, C.; Bruggeman, A.; Külls, C.; Constantinou, C. |
| Title |
Isotope hydrology and hydrogeochemical modeling of Troodos Fractured Aquifer, Cyprus: The development of hydrogeological descriptions of observed water types |
Type |
Journal Article |
| Year |
2020 |
Publication |
Applied Geochemistry |
Abbreviated Journal |
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| Volume |
123 |
Issue |
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Pages |
104780 |
| Keywords |
Isotope hydrology, Hydrogeochemical modelling, Hydrochemistry, Kargiotis, Troodos |
| Abstract |
The origin of groundwater recharge and subsequent flow paths are often difficult to establish in fractured, multi-lithological, and highly compartmentalized aquifers such as the Troodos Fractured Aquifer (TFA). As the conjunctive use of stable isotopes and hydrogeochemical data provides additional information, we established a monitoring network for stable isotopes in precipitation in Cyprus. The local meteoric water line, altitude effect and seasonal variation of stable isotopes in precipitation are derived from monitoring data. Stable isotopes and hydrogeochemical data are combined to model water-rock interactions and groundwater evolution along a complete ophiolite sequence. As a result a generic hydrogeologic description for the observed water types is developed. Isotope hydrology was applied in conjunction with hydrogeochemical modelling in Kargiotis Watershed, a major north-south transect of the TFA. PHREEQC was used for hydrogeochemical modelling to establish generic descriptions for observed water types. Mean precipitation-weighted values from 16 monitoring stations were used to calculate the Local Meteoric Water Line (LMWL), which was found to be equal to δ2H = (6.58 ± 0.13)*δ18O + (12.64 ± 0.91). A general decrease of 1.22‰ for δ2H and 0.20‰ for δ18O in precipitation was calculated per 100 m altitude. A generic groundwater evolution path was established: 1. Na/MgClHCO3, 2. MgHCO3, 3. Ca/MgHCO3, 4. Ca/MgNaHCO3, 4a. MgNa/CaHCO3/Cl, 5. NaMg/CaHCO3/Cl, 6. NaHCO3, 7. Na/MgHCO3SO4, 8. NaSO4Cl/HCO3. Hydrogeologic descriptions, consisting of groundwater origin, flow path and possible active water-rock processes, have been realised for the observed water types. The first two water types occur in serpentine and ultramafic-gabbro springs. Type 3 waters represent early stages of recharge and/or short flow paths, in gabbro whereas types 4 and 5 are typical for further percolating waters in gabbro and diabase. Water types 6 and 7 occur both in diabase and in the basal group and represent the regional flow. Water type 8 is the end member of regional, upwelling groundwater in the basal group. The presented descriptions and methods have practical applications in groundwater exploration, characterization, and protection. The methodology can be applied in other complex aquifer systems. |
| Address |
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Thesis |
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| Language |
english |
Summary Language |
english |
Original Title |
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Edition |
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| ISSN |
0883-2927 |
ISBN |
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| Area |
Cyprus |
Expedition |
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Conference |
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| Notes |
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Approved |
no |
| Call Number |
THL @ christoph.kuells @ Christofi2020104780 |
Serial |
76 |
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| Author |
Akter, A.; Tanim, A.H.; Islam, M.K. |
| Title |
Possibilities of urban flood reduction through distributed-scale rainwater harvesting |
Type |
Journal Article |
| Year |
2020 |
Publication |
Water Science and Engineering |
Abbreviated Journal |
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| Volume |
13 |
Issue |
2 |
Pages |
95-105 |
| Keywords |
Low-impact development (LID), SWMM, HEC-RAS, Remote sensing, Urban flooding, Inundation depth |
| Abstract |
Urban flooding in Chittagong City usually occurs during the monsoon season and a rainwater harvesting (RWH) system can be used as a remedial measure. This study examines the feasibility of rain barrel RWH system at a distributed scale within an urbanized area located in the northwestern part of Chittagong City that experiences flash flooding on a regular basis. For flood modeling, the storm water management model (SWMM) was employed with rain barrel low-impact development (LID) as a flood reduction measure. The Hydrologic Engineering Center’s River Analysis System (HEC-RAS) inundation model was coupled with SWMM to observe the detailed and spatial extent of flood reduction. Compared to SWMM simulated floods, the simulated inundation depth using remote sensing data and the HEC-RAS showed a reasonable match, i.e., the correlation coefficients were found to be 0.70 and 0.98, respectively. Finally, using LID, i.e., RWH, a reduction of 28.66% could be achieved for reducing flood extent. Moreover, the study showed that 10%–60% imperviousness of the subcatchment area can yield a monthly RWH potential of 0.04–0.45 m3 from a square meter of rooftop area. The model can be used for necessary decision making for flood reduction and to establish a distributed RWH system in the study area. |
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| ISSN |
1674-2370 |
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Approved |
no |
| Call Number |
THL @ christoph.kuells @ Akter202095 |
Serial |
247 |
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| Author |
Jin, Z.; Külls, C. |
| Title |
FDM based OA-ICOS for high accuracy 13C quantification in gaseous CO2 |
Type |
Journal Article |
| Year |
2020 |
Publication |
Earth and Environmental Science |
Abbreviated Journal |
EES |
| Volume |
446 |
Issue |
3 |
Pages |
032061 |
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IOP Conference Series |
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Approved |
no |
| Call Number |
THL @ christoph.kuells @ Jin2020fdm |
Serial |
16 |
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| Author |
Mahindawansha, A.; Külls, C.; Kraft, P.; Breuer, L. |
| Title |
Investigating unproductive water losses from irrigated agricultural crops in the humid tropics through analyses of stable isotopes of water |
Type |
Journal Article |
| Year |
2020 |
Publication |
Hydrology and Earth System Sciences |
Abbreviated Journal |
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| Volume |
24 |
Issue |
7 |
Pages |
3627-3642 |
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| Publisher |
Copernicus GmbH |
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Approved |
yes |
| Call Number |
THL @ christoph.kuells @ Mahindawansha2020investigating |
Serial |
14 |
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