Journal of Environmental Hydrology
نویسندگان
چکیده
Journal of Environmental Hydrology Volume 17 Paper 7 February 2009 1 A parallelized large-scale regional hydrologic soil model (RHSM) is developed as a tool for large-scale unsaturated zone investigations. It is applied to simulate the temporal and spatial responses of the unsaturated zone and the regional water budget under the forcing of realistic precipitation and evaporation scenarios. The Richards equation is used to describe the flow movement in the vadose zone and is solved using a finite element code. The RHSM provides a way to deal with the enormous discretization demand of unsaturated flow simulation at regional scales. The relatively thin soil cover is modeled vertically by 1D line elements with adequate resolution, whereas the large lateral dimensions are modeled as coarser grid patches, the so-called influence areas. In order to achieve reasonable computation times for a single model run the independence properties of the RHSM are elegantly exploited to realize a relatively uncomplex code parallelization. The parallelized RHSM runs on Linux supported symmetric multiprocessing computers using the message passing interface (MPI). This implementation attains a high performance computation of regional scale hydro-system models. In an application study at the Beerze-Reusel drainage basin (Netherlands), a high resolution of variably saturation distributions and wet front movements are obtained for the anisotropic field using the parallel RHSM. An analysis of the computational speed-up demonstrates the performance gain of the parallel RHSM. A REGIONAL HYDROLOGICAL SOIL MODEL FOR LARGE-SCALE APPLICATIONS: COMPUTATIONAL CONCEPT AND IMPLEMENTATION
منابع مشابه
Efficiency Assessment of Rangeland Hydrology and Erosion Model (RHEM) for water erosion quantification (Case Study: Sangane Watershed-Iran)
متن کامل
Tradeoffs for the implementation of a process-based catchment model in a poorly gauged, highly glacierized Himalayan headwater
1 University of Basel, Department of Environmental Sciences, Applied and Environmental Geology, Basel, Switzerland 2 UNESCO-IHE, Department of Water Engineering, Delft, The Netherlands 3 Bavarian Academy of Sciences, Commission of Glaciology, Munich, Germany 4 Department of Hydrology and Meteorology, Snow and Glacier Hydrology Unit, Katmandu, Nepal 5 University of Freiburg, Institute of Hydrolo...
متن کاملEnvironmental Isotope Applications in Hydrology: an Overview of the Iaea's Activities, Experiences, and Prospects
Development and applications of isotope methodologies in hydrology have been an integral part of the program component of the IAEA over the last three decades, within the framework of its overall activities related to peaceful nuclear applications. The use of environmental isotopes as a means of tracing water movement in the hydrology including surface and ground water is much of the Agency's w...
متن کاملStudy on Baseflow Separation of "Abolabas River” Using ADUKIH and RDF Methods
Objective: Currently, the evaluation of baseflow components have been of a worldwide concern due to the influential role of streamflow (base flow and direct flow)in agriculture, water sources management as well as supplying the potable water. Direct and field measurement of baseflow is not practicable especially in large areas with statistics deficiencies. Also, this would not be economically e...
متن کاملTesting Uncertainty In A Model Of Stream Bank Erosion
1 Co-operative Research Centre for Catchment Hydrology and the Department of Civil and Environmental Engineering, University of Melbourne ([email protected], [email protected], [email protected]). 2 Co-operative Research Centre for Catchment Hydrology and the School of Anthropology, Geography and Environmental Studies, University of Melbourne (idruth@unimel...
متن کاملA multi-scale remote sensing approach for monitoring northern peatland hydrology: present possibilities and future challenges.
Remote sensing has the potential to provide quantitative spatially explicit hydrological information across northern peatland complexes. This paper details a multi-scale remote sensing approach for assessing the use of Sphagnum mosses as proxy indicators of near-surface hydrology. Several spectral indices developed from the near infra-red (NIR) and shortwave infra-red (SWIR) liquid water absorp...
متن کامل