| Records |
| 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 |
Type |
Journal Article |
| Year |
2013 |
Publication |
Hydrology and Earth System Sciences |
Abbreviated Journal |
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Volume  |
17 |
Issue |
1 |
Pages |
103 |
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| Publisher |
Copernicus GmbH |
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no |
| Call Number |
THL @ christoph.kuells @ Klaus2013macropore |
Serial |
23 |
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| Author |
Sardo, M.S.; Jalalkamali, N. |
| Title |
A system dynamic approach for reservoir impact assessment on groundwater aquifer considering climate change scenario |
Type |
Journal Article |
| Year |
2022 |
Publication |
Groundwater for Sustainable Development |
Abbreviated Journal |
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| Volume |
17 |
Issue |
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Pages |
100754 |
| Keywords |
System dynamics, Water resources management, Vensim, Management scenarios |
| Abstract |
With its arid and semi-arid climate, Iran claims about one-third of the world’s average annual precipitation. Accordingly, the present study investigated whether an effective water resources management (WRM) strategy (both groundwater and reservoir resources) could reduce groundwater drawdown while simultaneously providing secure enough water for preservation of agricultural activities and rural settlements. For this purpose, a comprehensive system dynamics (SD) model incorporating reservoir, surface-water, and groundwater resources was developed. Then, the model was implemented for the Nesa plain in Bam County, Iran, as an example. In this plain, the construction of a dam to supply drinking water to the cities of Bam and the Bam Industrial Zone had devastated the environment and human communities in the downstream areas, leading to the depopulation of as many as 104 villages in the Bam region. The results of the SD model revealed that the artificial recharge of the plain groundwater aquifer along with the management of the operation of the wells and increasing productivity would be very effective. In order to estimate future precipitation data, the SDSM statistical exponential microscale model was used to microscale the large CanESM2 scale model under two scenarios of RCP4.5 and RCP8.5. The continuation of the current trend of the groundwater resources in the plain during the next 20 years will also cause a drop in water level of 8.3 m compared with the existing situation and a reduction of 41 m compared with the long-term average of 1980. Based on this modeling effort, upon releasing 60% of river flow, surplus to downstream demand, for recharging aquifer through artificial recharge projects, the rate of water table fall will decline significantly over a 20-year period and the amount of negative aquifer water balance would most likely improve from 65.5 to 35.17 million cubic meters annually. |
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Edition |
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| ISSN |
2352-801x |
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Approved |
no |
| Call Number |
THL @ christoph.kuells @ Shahrokhisardo2022100754 |
Serial |
266 |
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| Author |
Garvelmann, J.; Külls, C.; Weiler, M. |
| Title |
A porewater-based stable isotope approach for the investigation of subsurface hydrological processes |
Type |
Journal Article |
| Year |
2012 |
Publication |
Hydrology & Earth System Sciences |
Abbreviated Journal |
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| Volume |
16 |
Issue |
2 |
Pages |
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no |
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THL @ christoph.kuells @ Garvelmann2012porewater |
Serial |
24 |
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| Author |
Hdeib, R.; Aouad, M. |
| Title |
Rainwater harvesting systems: An urban flood risk mitigation measure in arid areas |
Type |
Journal Article |
| Year |
2023 |
Publication |
Water Science and Engineering |
Abbreviated Journal |
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| Volume |
16 |
Issue |
3 |
Pages |
219-225 |
| Keywords |
Rainwater harvesting, Urban floods, Flood map, Hydrodynamic model, Built environment, Arid areas |
| Abstract |
Rainwater harvesting (RWH) systems have been developed to compensate for shortage in the water supply worldwide. Such systems are not very common in arid areas, particularly in the Gulf Region, due to the scarcity of rainfall and their reduced efficiency in covering water demand and reducing water consumption rates. In spite of this, RWH systems have the potential to reduce urban flood risks, particularly in densely populated areas. This study aimed to assess the potential use of RWH systems as urban flood mitigation measures in arid areas. Their utility in the retention of stormwater runoff and the reduction of water depth and extent were evaluated. The study was conducted in a residential area in Bahrain that experienced waterlogging after heavy rainfall events. The water demand patterns of housing units were analyzed, and the daily water balance for RWH tanks was evaluated. The effect of the implementation of RWH systems on the flood volume was evaluated with a two-dimensional hydrodynamic model. Flood simulations were conducted in several rainfall scenarios with different probabilities of occurrence. The results showed significant reductions in the flood depth and flood extent, but these effects were highly dependent on the rainfall intensity of the event. RWH systems are effective flood mitigation measures, particularly in urban arid regions short of proper stormwater control infrastructure, and they enhance the resilience of the built environment to urban floods. |
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1674-2370 |
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Approved |
no |
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THL @ christoph.kuells @ Hdeib2023219 |
Serial |
242 |
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| Author |
Aldawsari, S.; Kampmann, R.; Harnisch, J.; Rohde, C. |
| Title |
Setting Time, Microstructure, and Durability Properties of Low Calcium Fly Ash/Slag Geopolymer: A Review |
Type |
Journal Article |
| Year |
2022 |
Publication |
Materials |
Abbreviated Journal |
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| Volume |
15 |
Issue |
3 |
Pages |
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| Abstract |
Ordinary Portland cement (OPC) is known for its significant contribution to carbon dioxide emissions. Geopolymer has a lower footprint in terms of CO2 emissions and has been considered as an alternative for OPC. A well-developed understanding of the use of fly-ash-based and slag-based geopolymers as separate systems has been reached in the literature, specifically regarding their mechanical properties. However, the microstructural and durability of the combined system after slag addition introduces more interactive gels and complex microstructural formations. The microstructural changes of complex blended systems contribute to significant advances in the durability of fly ash/slag geopolymers. In the present review, the setting time, microstructural properties (gel phase development, permeability properties, shrinkage behavior), and durability (chloride resistance, sulfate attack, and carbonatation), as discussed literature, are studied and summarized to simplify and draw conclusions. |
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1996-1944 |
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Approved |
no |
| Call Number |
THL @ christoph.kuells @ ma15030876 |
Serial |
84 |
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