| Records |
| Author |
Röttcher, K. |
| Title |
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Type |
Book Chapter |
| Year |
2018 |
Publication |
Risikomanagement und Nachhaltigkeit in der Wasserwirtschaft: Erfolgreiche Navigation durch die Komplexität und Dynamik des Risikos |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages  |
165-174 |
| Keywords |
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| Abstract |
Im vorliegenden Beitrag werden beispielhaft unterschiedliche Ansätze des Risikomanagements und das Verständnis von Nachhaltigkeit in der Wasserwirtschaft dargelegt. Die Darstellung richtet sich insbesondere an Leser aus anderen Fachdisziplinen, wie das Rechts- und Finanzwesen, den Fahrzeug- und Maschinenbau oder auch die sozialen Berufe. Die Zusammenhänge werden überblicksartig mit einzelnen konkreten Beispielen dargestellt mit dem Fokus auf die grundsätzlichen Denk- und Vorgehensweisen. |
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Thesis |
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| Publisher |
Springer Fachmedien Wiesbaden |
Place of Publication |
Wiesbaden |
Editor |
Michalke, A.; Rambke, M.; Zeranski, S. |
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Edition |
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| ISSN |
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ISBN |
978-3-658-19684-4 |
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| Notes |
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Approved |
no |
| Call Number |
THL @ christoph.kuells @ Röttcher2018 |
Serial |
90 |
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| Author |
Voerkelius, S.; Külls, C.; Santiago, M.M.F.; Frischkorn, H.; dos Santos Semrau, L.A.; Heinrichs, G.; Gil, M.M.L. |
| Title |
Investigations on water management and water quality in Picos/PI and Tauá/CE |
Type |
Book Chapter |
| Year |
2003 |
Publication |
Global change and regional impacts |
Abbreviated Journal |
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Issue |
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Pages |
173-184 |
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| Publisher |
Springer, Berlin, Heidelberg |
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no |
| Call Number |
THL @ christoph.kuells @ Voerkelius2003investigations |
Serial |
40 |
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| Author |
Illgen, M.; Ackermann, H. |
| Title |
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Type |
Book Chapter |
| Year |
2019 |
Publication |
Urban Flood Prevention: Technical and Institutional Aspects from Chinese and German Perspective |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
173-193 |
| Keywords |
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| Abstract |
Today’s cities face the challenge of climate change adaptation worldwide. In this context, prevention of damage caused by flash floods plays an important role. This requires a cooperative pluvial flood risk management approach, which includes planning, technical, and administrative measures and involves preliminary flood risk analyses. This article outlines the main components of this risk management approach, which has proven its effectiveness in Europe. The recommendations formulated for this purpose are applicable or adaptable to regions with other constraints, such as China, for example. |
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| Publisher |
Springer International Publishing |
Place of Publication |
Cham |
Editor |
Köster, S.; Reese, M.; Zuo, J.’e |
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Edition |
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ISBN |
978-3-030-01488-9 |
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Approved |
no |
| Call Number |
THL @ christoph.kuells @ Illgen2019 |
Serial |
87 |
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| Author |
Abiye, T. |
| Title |
Synthesis on groundwater recharge in Southern Africa: A supporting tool for groundwater users |
Type |
Journal Article |
| Year |
2016 |
Publication |
Groundwater for Sustainable Development |
Abbreviated Journal |
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| Volume |
2-3 |
Issue |
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Pages |
182-189 |
| Keywords |
Arid and semi-arid areas, Groundwater recharge, Recharge estimation methods, Southern Africa |
| Abstract |
This synthesis on groundwater recharge targets the Southern African region as a result of the dependence of the community and economic sector on the groundwater resource. Several literature based recharge studies were collected and assessed in order to find out the main controls to the occurrence of recharge. The Water Table Fluctuation and Base flow separation methods have been tested in the catchment that drains crystalline basement rocks and dolostones close to the city of Johannesburg, South Africa. Based on the assessed data the Chloride Mass Balance method resulted in groundwater recharge of less than 4% of the rainfall, while it reaches 20%, when rainfall exceeds 600mm. For the classical water balance method, recharge proportion is less than 3% of rainfall as a result of very high ambient temperature in the region. Based on the Saturated Volume Fluctuation and Water Table Fluctuation methods, recharge could be less than 6% for annual rainfall of less than 600mm. Observational results further suggest that sporadic recharge from high intensity rainfall has important contribution to the groundwater recharge in the region, owing to the presence of permeable geological cover, which could not be fully captured by most of the recharge estimation methods. This study further documents an evaluation of the most reliable recharge estimation methods in the area such as the chloride mass balance, saturated volume fluctuation and water table fluctuation methods in order to successfully manage the groundwater resource. |
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Series Issue |
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Edition |
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| ISSN |
2352-801x |
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Approved |
no |
| Call Number |
THL @ christoph.kuells @ abiye_synthesis_2016 |
Serial |
101 |
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| Author |
Gasse, F. |
| Title |
Hydrological changes in the African tropics since the Last Glacial Maximum |
Type |
Journal Article |
| Year |
2000 |
Publication |
Quaternary Science Reviews |
Abbreviated Journal |
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| Volume |
19 |
Issue |
1 |
Pages |
189-211 |
| Keywords |
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| Abstract |
Paleohydrological data from the African tropics and subtropics, including lake, groundwater and speleothem records, are reviewed to show how environments and climates from both hemispheres are inter-related. Although orbitally induced changes in the monsoon strength account for a large part of long-term climatic changes in tropical Africa, the Late Pleistocene–Holocene hydrological fluctuations rather appear to have been a series of abrupt events that reflect complex interactions between orbital forcing, atmosphere, ocean and land surface conditions. During the Last Glacial Maximum (23–18ka BP), most records indicate that generally dry conditions have prevailed in both hemispheres, associated with lower tropical land- and sea-surface temperatures. This agrees with simulations using coupled ocean–atmosphere models, which predict cooling and reduced summer precipitation in tropical Africa; the global hydrological cycle was weaker than today when the extent of large polar ice-sheets and sea-ice was a prominent forcing factor of the Earth’s climate. Glacial-interglacial climatic changes started early: a first wetting/warming phase at ca. 17–16ka BP took place during a period of rapid temperature increase in Antarctica. Next, two drastic arid-humid transitions in equatorial and northern Africa occurred around 15–14.5ka BP and 11.5–11ka BP. Both are thought to match the major Greenland warming events, in concert with the switching of the oceanic thermohaline circulation to modern mode. However, part of the climatic signal after 15 ka BP also seems related to the Antarctica climate. During the Holocene, Africa has also experienced rapid hydrological fluctuations of dramatic magnitude compared to the climatic changes at high latitudes. In particular, major dry spells occurred around 8.4–8ka and 4.2–4ka BP in the northern monsoon domain. Comparison with other parts of the world indicates that these events have a worldwide distribution but different regional expressions. In the absence of large polar ice sheets, changes in the continental hydrological cycles in the tropics may have a significant impact on the global climate system. Climate information gathered here allows to identify geographical and methodological gaps, and raise some scientific questions that remain to be solved to better understand how the tropics respond to changes in major climate-forcing factors, and how they influence climate globally. |
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Series Issue |
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Edition |
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| ISSN |
0277-3791 |
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Approved |
no |
| Call Number |
THL @ christoph.kuells @ gasse_hydrological_2000 |
Serial |
96 |
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