Archive Project News
WATCH Technical Report Number 27: Effects of climate changes on water resources in the Glomma River basin, Norway In WATCH, a number of test basins across Europe have been used to study effects of climate change on a variety of water resource applications. Here, results from five small catchments within the Glomma River basin in Norway are presented; an area that provides hydropower services under threat of precipitation and temperature increases. The focus in this study is two-fold. First, the effects of climate change on snow and runoff is studied, including a comparison of hydrological simulation results using fine and large scale meteorological data. Second, effects of climate change on hydropower production in the northeastern part of the Glomma River basin are analyzed.
Ingjerd Haddeland, NVE, July 30, 2011
Parched soils trigger more storms Afternoon storms are more likely to develop when soils are parched, according to a new study published this week in Nature which examined hydrological processes across six continents. This research was funded by the WATCH project, the UK NERC and the ESA WACMOS project.
NERC - Centre for Ecology & Hydrology, September 12, 2012
WATCH publication Special Collection in Journal of Hydrometeorology This special collection of WATCH Publications brings together the results from the European-based program Water and Global Change (WATCH). It provides a representative synthesis of these contributions toward improved understanding of future state of the water cycles including the uncertainties in our current knowledge.
American Meteorological Society, May 31, 2011
Course Environment and Global Change: Uncertainty & risk assessment (May 2-15 2011) The objective of this short course is to get introduced to tools for risk assessment with regard to global change, and will take place between May 2-15 2011 at UNESCO-IHE, Delft, the Netherlands. The course looks at impacts on the water resources considering floods and droughts, using a hydrological model using SWAT (Soil and Water Assessment Tool) and a hydrodynamic model.
UNESCO-IHE, March 30, 2011
WATCH Technical Report Number 26: Simulation of low flows and drought events in WATCH test basins Impact of different climate forcing datasets Large-scale meteorological datasets are applied more-and-more in hydrological modelling applications. But are these data useful on catchment scale? And how well can models driven with large-scale forcing data capture extremes, i.e. severe drought events?
In this report, the results of hydrological modelling using both local and large-scale forcing data in the WATCH test basins, i.e. five small, contrasting catchments in Europe, are given. The objective of this study was to assess the suitability of large-scale forcing data (in this case the WATCH Forcing Data or WFD) in smaller catchments. The overall conclusions of this research are: 1) The differences between the WFD and local forcing seem to be acceptable as input for hydrological model applications. 2) In all studied catchments and for all models, the difference between simulations and observations is much larger than difference between simulations with different forcing data. 3) In all studied catchments, the difference between simulations with different models is much larger than difference between simulations with different forcing data. 4) All models seem to be able to reproduce the most severe drought events in observed discharge with both forcing datasets in all catchments.
Marjolein H.J. van Huijgevoort, Anne F. van Loon, Martin Hanel, Ingjerd Haddeland, Oliver Horvát, Aristeidis Koutroulis, Andrej Machlica, Graham Weedon, Miriam Fendeková, Ioannis Tsanis, Henny A.J. van Lanen, March 18, 2011
European Geosciences Union General Assembly 2011 (03 – 08 April 2011) The EGU General Assembly 2011 will bring together geoscientists from all over the world into one meeting covering all disciplines of the Earth, Planetary and Space Sciences. Especially for young scientists the EGU appeals to provide a forum to present their work and discuss their ideas with experts in all fields of geosciences. WATCH is hosting the splinter session SPM1.18: "Global Changes in Water Resources and Extremes: results from the WATCH project".
EGU, March 10, 2011
WATCH paper "Global river temperatures and sensitivity to atmospheric warming and changes in river flow" published in Water Resources Research This study, carried out by WATCH staff members, investigates the impact of both air temperature and river discharge changes on daily water temperatures for river stations globally. A nonlinear water temperature regression model was adapted to include discharge as a variable in addition to air temperature, and a time lag was incorporated to apply the model on a daily basis. The performance of the model was tested for a selection of study basin stations and 157 river temperature stations globally using historical series of daily river temperature, air temperature, and river discharge for the 1980–1999 period.
Van Vliet, M. T. H., F. Ludwig, J. J. G. Zwolsman, G. P. Weedon, and P. Kabat / Water Resources Research 47, W02544, February 26, 2011