[:::GenRiver:::]



		GenRiver : a generic river flow model GenRiver is a generic model of river flow in response to spatially explicit rainfall and a plot-level water balance that responds to changes in vegetation and soil. The model was developed as a tool to analyze river flow in the Sumberjaya watershed (Lampung, Indonesia) with default input parameters for a 400 km² area with 2.5 m/year of rainfall. The model treats a river as a summation of streams, each originating in a subcatchment with its own daily rainfall, yearly landcover fractions and constant total area and distance to the river outflow (or measurement) point. Interactions between streams in their contribution to the river are considered to be negligible (i.e. there is no 'backflow' problem). Spatial patterns in daily rainfall events are translated into average daily rainfall in each subcatchment in a separate module (SpatRain.xls). The subcatchment model represents interception, infiltration into soil, rapid percolation into subsoil, surface flow of water and rapid lateral subsurface flow into streams with parameters that can vary between land cover classes. The GenRiver model (STELLA) is accompanied by an excel file (GenRiver.xls) where you can place your input parameters. back to top -------------------------------------------------------------------------------- How to use it? To run the model you have three options: demo version of Stella Commercial Run Time Stella Research or Non-Research, version 5.1 or above.. These three options will allow you (progressively to): run the model but not save you results, run the model and save results, run and modify the model and save results. If you open GenRiver, you will see some explanatory text and a number of buttons that allow you to run the model, set a number of key parameters (by moving sliders) and look at the output via some direct screen output, a stack of graphs and tables. back to top -------------------------------------------------------------------------------- Download Model GenRiver.stm (zipped) 1598 KB GenRiver.xls (zipped) 193 KB Documents GenRiver Description 2790 KB GenRiver Brief Description 645 KB GenRiver introduction 4450 KB GenRiver Presentation htm file -------------------------------------------------------------------------------- Model Version and Contact Information This is version 1.0 of GenRiver model. We would certainly like to receive feedback on the model in its current form. For further information, please contact: Dr. Meine van Noordwijk ICRAF Southeast Asia Programme P.O. Box 161 Bogor 16001 Indonesia e-mail: M.van-Noordwijk@cgiar.org back to top -------------------------------------------------------------------------------- Disclaimer and Copyright This is version 1.0 of a model on river flow. Although efforts have been made to incorporate relevant process knowledge on a range of interactions, the model is not more (and not less) than a research tool. Model predictions may help in developing specific hypotheses for research, in exploring potential management options and extrapolation domains, but they should not be used as authoritative statements per se. Copy right, but do not copy wrong. The GenRiver model was developed on the basis of publicly funded research at the International Centre for Research on Agroforestry (ICRAF) and may be used for non-commercial research purposes in the interest of the smallholder agroforesters of the world. The STELLA modeling shell used is protected by international copyright. back to top --------------------------------------------------------------------------------