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FORHYCS: FORest and HYdrology Change in Switzerland - a simulation study

English title FORHYCS: FORest and HYdrology Change in Switzerland - a simulation study
Applicant Lischke Heike
Number 153544
Funding scheme Project funding (Div. I-III)
Research institution Swiss Federal Research Inst. WSL Direktion
Institution of higher education Swiss Federal Institute for Forest, Snow and Landscape Research - WSL
Main discipline Hydrology, Limnology, Glaciology
Start/End 01.06.2014 - 31.05.2017
Approved amount 177'551.00
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All Disciplines (5)

Discipline
Hydrology, Limnology, Glaciology
Ecology
Other disciplines of Environmental Sciences
Botany
Agricultural and Forestry Sciences

Keywords (11)

country scale; catchment scale; ensemble; forest dynamics; ensemble; feedback; fine resolution; hydrology; modeling; tree species migration; land use change

Lay Summary (German)

Lead
Die Studie untersucht die Auswirkungen des Klimawandels in der Schweiz auf die Hydrologie und auf den Wald, welche sich gegenseitig beeinflussen.
Lay summary
Ein Modell zur grossflächigen, aber fein aufgelösten, gekoppelten Simulation von Walddynamik und Wasserhaushalt, das auch durch Schnee- und Gletscherdynamik beeinflusst wird, soll getestet und erweitert werden. Eine Erweiterung besteht darin, das Modell  mit Szenarien von Landnutzungsänderungen anzutreiben. Mit diesem erweiterten Modell soll dann die Entwicklung des Waldes – bezogen auf die Biomasse, Artenzusammensetzung, und Artenverbreitung – und der Hydrologie – bezogen auf Bodenwasser und Abfluss – unter sich änderndem Klima simuliert werden.   Um den Unsicherheiten  der zukünftigen Klima- und Landnutzungs-Entwicklung Rechnung zu tragen und den Bereich von möglichen Reaktionen von Wald und Hydrologie abzubilden, werden viele  Szenarien von Klima und Landnutzungs-Änderungen verwendet (Ensemble-Studie)

Änderungen  in Zustand, Struktur und Verbreitung des Waldes – hervorgerufen durch Klima- und Landnutzungsänderungen – beeinflussen auch Leistungen des Waldes, wie Holzproduktion oder Schutz vor Naturgefahren.  Eine wichtige Waldfunktion besteht in der Regulation des Wasserhaushalts im Boden und des Abflusses durch Abfangen des Niederschlags, Speicherung im Boden und Blattverdunstung. Das Wachstum und Überleben der Bäume wiederum hängt stark vom zur Verfügung stehenden Wasser ab.  Diese Rückkopplung erfordert eine gemeinsame Betrachtung und Simulation von Hydrologie und Wald.

Direct link to Lay Summary Last update: 01.04.2014

Responsible applicant and co-applicants

Employees

Collaboration

Group / person Country
Types of collaboration
WSL: Dendro-Klimat.,-Oekol., LWF, LFI, Waldböden Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
J. Pongratz, C. Reick, MPI Meteorologie, Hamburg Germany (Europe)
- in-depth/constructive exchanges on approaches, methods or results
C.Raible, Oeschger-Center, Bern Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
Ben Poulter, LSCE Paris France (Europe)
- in-depth/constructive exchanges on approaches, methods or results
T. Hickler, C. Werner, Forsch.-zentrum Biodiv. & Klima Germany (Europe)
- in-depth/constructive exchanges on approaches, methods or results
C2SM Switzerland (Europe)
- Research Infrastructure
Peter Verburg, Univ. Amsterdam, Erd- und Lebenswiss./ Spatial analysis and decision support Netherlands (Europe)
- in-depth/constructive exchanges on approaches, methods or results
AlpS - Innsbruck Austria (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Exchange of personnel

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
EGU General Assembly 2017 Poster How do soil and canopy properties affect forest drought? Sensitivity analysis of a water balance model 08.04.2017 Wien, Austria Zappa Massimiliano; Lischke Heike; Speich Matthias;
EcoSummit 2016 Poster Modelling ecohydrological processes on landscape scale:A groundtruthing study on Alpine forests 29.08.2016 Montpellier, France Zappa Massimiliano; Lischke Heike; Speich Matthias;
Swiss Geoscience Meeting 2015 Talk given at a conference FORHYCS – A distributed ecohydrological model for assessing globalchange impact on forests and water resources 21.11.2015 Basel, Switzerland Zappa Massimiliano; Speich Matthias; Lischke Heike;
HydroEco 2015 Poster Partitioning of evapotranspiration in a semi-conceptual ecohydrological model applied to an Alpine valley. 13.04.2015 Wien, Austria Zappa Massimiliano; Speich Matthias; Lischke Heike;


Associated projects

Number Title Start Funding scheme
125925 Early recognition of critical drought conditions in Switzerland - coping with shortages in soil moisture, groundwater and runoff (DROUGHT-CH) 01.01.2010 NRP 61 Sustainable Water Management
122434 MUSCATELLA: Multiscale Spatiotemporal Forest Landscape Modeling 01.01.2010 Project funding (Div. I-III)
163223 CompMig: Extension and comparison of tree species migration models and Europe-wide simulations in the Holocene 01.03.2016 Project funding (Div. I-III)

Abstract

Changes in forest state, structure and distribution - induced by changes in climate or land-use - will also affect ecosystem goods and services of mountain forests. In particular, mountain forests are key in regulating the regional (catchment to Swiss-scale) hydrology via interception, transpiration and soil-water content. Tree processes, in turn, are strongly influenced by hydrology, which affects water supply and status of the trees, nutrient transport, and assimilation, and can lead to drought stress, decreased establishment and growth, increased susceptibility to pests and increased mortality. In the forest, changing water supply leads to changing species composition, leaf area, biomass, structure, and density, up to forest-diebacks under extreme conditions. Thus, the influences of forests on hydrology and vice versa form a feedback loop, which links the dynamics of both and requires that they are studied and simulated together. Furthermore, both, forests and hydrology are influenced by climate and land-use change. To provide regional scale assessments of the combined effects of forest and hydrology dynamics, we built on the first implementation of a coupled model developed in an ongoing project, which is based on the forest landscape model TreeMig and the hydrological model PREVAH. After extension, optimization and initialization of this model, we a) assess the importance of the forest-hydrology feedback at the catchment scale, and b) apply the model for the coming century at the regional scale (catchments up to the whole of Switzerland), using various scenarios of land-use and climate change scenarios. This ensemble approach will help to assess hydrology and forest dynamics in Switzerland driven by climate and land-use change scenarios for the coming century.
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