AnKliG - Adaptation Strategies for Climate Change and Extreme Weather Conditions and Measures for a Sustainable Groundwater Management
Hintergrund und Ziele
Climate change has a key impact on groundwater management. It affects both the available water supply and the water demand. Groundwater and springs cover 70% of the public drinking water supply in Germany. Concurrently there is an intense land utilization which leads to competitive interests. In general not mean but extreme high or low groundwater levels cause conflicts in water use between different sectors like the urban areas, agriculture, nature conservation and forestry. To obtain a sustainable groundwater management the research project has to assess the effects of climate change on the groundwater balance and to figure out which adaptive actions and strategies need to be developed.
Based on regional climate simulations the impacts of climate change on soil water and groundwater balances will be quantified by long term-continuous simulations until 2100. Climate change as well as demographic effects will alter the use of groundwater in the future. This has to be compared to the impact of climate change on the yield capabilities of groundwater resources.
Areas investigated were the Hessische Ried and the neighbouring Odenwald forest in Southern Hesse.
Work packages of this project:
- Evaluate the supply guarantee of local facilities for public water use (e.g. springs in the Odenwald)
- Quantify the impact of climate change on high-/low-level of groundwater table
- Assess the extension of conflicts of groundwater utilization to other kinds of land use
- Reveal capabilities and limitations of groundwater management to counterbalance the impact of climate change on groundwater resources
- Develop strategies for action in regional water management because of alterations in groundwater table and resources due to climate change
The results may be transferred to other regions in respect of
- the efficiency of actions to counterbalance the impact of climate change on groundwater resources (e.g. connecting water works),
- the increase of monitoring in order to strengthen regional groundwater management, or
- the capabilities of the expansion of groundwater recharge by artificial infiltration.
Important fields of adaptive actions are wine- and fruit-growing, agriculture and forestry. This research project will provide reliable data about the changes in soil moisture in the future (e.g. frequency and duration of droughts), which are essential basics for the planning in that field.
Laufzeit
bisUntersuchungsregion/-raum
Land
- Deutschland
Bundesland
- Hessen
Naturräumliche Zuordnung
- Alb und nordbayerisches Hügelland
- Oberrheingraben
Schritte im Prozess zur Anpassung an den Klimawandel
Schritt 1: Klimawandel verstehen und beschreiben
Ansatz und Ergebnisse
Groundwater recharge was determined by long-term simulation differentiated locally up to 2100, and implemented in a transient groundwater model for the Hessische Ried. In the forecast calculations, various approaches to the regionalisation of the course of global climate model ECHAM5 (considering IPCC emission scenario A1B, A2 and B1) were evaluated with the data sets from WETTREG, STAR and CLM and downscaled by the CEC Potsdam GmbH through a statistical approach.
Parameter (Klimasignale)
- Flusshochwasser
- Hitzewellen
- Sturzfluten
- Veränderte Niederschlagsmuster
- Höhere mittlere Temperaturen
- Starkniederschlag (inkl. Hagel, Schnee)
Zeithorizont
- langfristig = bis 2100 und darüber hinaus
Schritt 2a: Risiken erkennen und bewerten (Klimafolgen/-wirkungen)
Analyseansatz
Consequences for the groundwater balance will be observed: Groundwater level, groundwater recharge, available groundwater water supply and the consumption of ground water. Regarding to hydrological investigations of the Integrated Climate Protection Programme Hesse (INKLIM 2012) climate change will cause a higher renewal rate for groundwater in many areas of Hesse to vary seasonally.
Schritt 3: Maßnahmen entwickeln und vergleichen
Maßnahmen und/oder Strategien
Aside from adaptive strategies regarding the ground water management, adaptive options for important fields like wine- and fruit-growing, agriculture and forestry will be considered as well. To provide profound knowledge in the course of further development of adaptive strategies in these sectors, future shifts in ground- and soil water levels will be quantified in respect of temporal dynamics (e.g. duration of drought).
Zeithorizont
- 2071–2100 (ferne Zukunft)
Konfliktpotential / Synergien / Nachhaltigkeit
There are conflicts of utilization of groundwater between nature conservation, forestry, urban areas and agriculture.
Wer war oder ist beteiligt?
Förderung / Finanzierung
Funding programme “klimazwei – research for climate protection and protection from climate impacts”, Federal Ministry of Education and Research (BMBF), Germany
Projektleitung
BGS UMWELT, Brandt Gerdes Sitzmann Umweltplanung
Beteiligte/Partner
Hessisches Landesamt für Umwelt und Geologie; Hessenwasser GmbH & Co. KG
Ansprechpartner
BGS UMWELT, Brandt Gerdes Sitzmann Umweltplanung
An der Eschollmühle 28
64297 Darmstadt
www.bgsumwelt.de
