GAWSER (Guelph All-Weather Storm Event Runoff)

GAWSER (Guelph All Weather Sequential Event Runoff) model was developed to predict streamflow from rainfall and snowmelt precipitation events. The model was applied in the Grand River Watershed, where gradually evolved into real-time flood forecast model GRIFFS (Grand River Integrated Flood Forecasting System)

streamflowrainfallsnowmeltprecipitation

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Initial contribute: 2020-01-02

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Quoted from: Hydrologic Model Selection for the CFCAS Project: Assessment of Water Resources Risk and Vulnerability to Change Climate Conditions. Project Report I., October 2003. https://ir.lib.uwo.ca/cgi/viewcontent.cgi?article=1008&context=wrrr 

GAWSER (Guelph All Weather Sequential Event Runoff) model was developed to predict streamflow from rainfall and snowmelt precipitation events. The model was applied in the Grand River Watershed, where gradually evolved into real-time flood forecast model GRIFFS (Grand River Integrated Flood Forecasting System). The Grand River Conservation Authority (GRCA) uses GRIFFS to make flood forecasts and test reservoir operations during floods, to estimate design flows for floodplain mapping and to test the impact of land use changes on streamflow. GRIFFS is capable of modeling single or multiple events and has provisions for recovery between events. The model includes temperature based snowmelt routines, distributed snowpack model, modified Green & Ampt infiltration model, Muskingum-Cunge channel routing, overland flow area per time curve routing and sub-surface flow routing (Boyd et al., 2000). The model provides comparison plots and statistics for observed and simulated flows at streamflow locations, detailed output of runoff calculations, a forecast summary which includes the forecast peak flow and time of peak flow at selected points of interest, reservoir storage forecast peak and time of peak, forecast peak inflows to reservoirs, automatic conversion of forecast flows to forecast levels for specified points of interest, summary table of when flooding is expected to start and stop at a given point of interest, summary table of parameter setting and full water balance. The model has shown excellent results on the Grand River Watershed. Future improvement to this model will focus on incorporation of real-time weather radar and numerical weather model precipitation information and integration with GIS (Boyd, et al., 2000). 

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GAWSER team (2020). GAWSER (Guelph All-Weather Storm Event Runoff), Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/901794c0-aa1d-4a3b-9461-54366c82847c
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zhangshuo
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Initial contribute : 2020-01-02

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