Abstract
 Application of GIS in the Determination of Probable Maximum Flood Track: Water Resources Author(s): Zoran Micovic The Probable Maximum Flood (PMF) is a hypothetical flood that is considered to be the most severe "reasonably possible" at a particular dam location. The UBC Watershed Model (UBCWM) was used to derive the PMF estimates for several BC Hydro dams in Southwestern British Columbia. The UBCWM uses the concept of area-elevation bands and point-input precipitation data. This means that a watershed is split into several elevation bands and the precipitation measured at a point (usually at one or two meteorological stations) is distributed to the elevation bands using the orographic precipitation gradients. However, the Probable Maximum Precipitation causing the PMF was provided in a rectangular-grid format of 3.5 km2 resolution, and as such could not be used as the UBCWM input. ArcView 3.2 with the Spatial Analyst extension was utilised to enable the UBCWM to use the gridded precipitation input and derive the corresponding PMF estimates. Zoran Micovic BC Hydro/University of British Columbia 6911 Southpoint Drive (B02) Burnaby , BC V3N 4X8 CA Phone: 604-528-7743 E-mail: zoran.micovic@bchydro.com |
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