top.gif (2928 bytes)

Home News Tour Projects Downloads FAQ Search Manual
  Introduction to Watflood :


WATFLOOD is an integrated set of computer programs to forecast flood flows for watershed having response times ranging from one hour to several weeks. Continuous simulation can be carried out by chaining up to 100  events.

The emphasis of the WATFLOOD system is on making optimal use of goereferenced remotely sensed data. Numerical weather model data, LANDSAT or SPOT land use and/or land cover data as well as DEM's can thus be directly incorporated in the hydrologic modeling

 WATFLOOD Features

CHARM Overview

CHARM is the hydrological modeling component in WATFLOOD. CHARM is supported by a number of pre and post processors in the data management system. CHARM was designed for distributed modelling using remotely sensed data, particularly from remotely sensed land cover maps and weather radar. To efficiently interface with such data, WATFLOOD/CHARM uses gridded modelling system, usually aligned with the local UTM system or lat-long coordinates with variable areas. It can therefore easily accommodate any georeferenced imagery, be connected to a GIS for input and output, and can be setup for any appropriate resolution.

Data Requirements

Compared to other hydrological modelling systems, WATFLOOD can be considered as a data intensive system. The initial development stages of the system (1972-75) coincided with the advent of remotely sensed data to provide land cover and meteorological data. It was immediately apparent that such data could enhance hydrological modelling but the models that existed at the time could not be easily adapted to take advantage of the high spatial and temporal resolution. From the onset, WATFLOOD was designed to incorporate the remotely sensed data in an efficient manner. This led to the gridded format of all data used by WATFLOOD, including discretization of the watershed itself. Thus in WATFLOOD, each "sub watershed" or grid cell is more-or-less the same size. Exceptions occur along basin and sub- basin boundaries to ensure drainage areas at streamflow gauges are preserved.




link.gif (859 bytes)
Watflood for Windows
copyright 1999-2000 Civil Engineering, University of Waterloo