Know where and how much runoff to expect
Physics-based
Distributed
Scalable
GIS-enabled
Remotely sensed input
Measured cross-sections
Continuous or Event-based
Turn your GIS data into an advanced hydrologic model
Vflo TM provides advanced, distributed
hydrologic modeling for managing water from
catchment to river basin scale. Improved hydrologic
modeling capitalizes on access to high-resolution
quantitative precipitation estimates from model
forecasts, radar, satellite, rain gauges, or combinations
in multisensor products. Worldwide digital datasets
offer tantalizing detail, which VfloTM utilizes directly
at a chosen resolution. The model is implemented in
JavaTM to take advantage of secure servlet technology
for multi-user access.
An advantage of physics-based models is that
they can be setup with minimal historical data and
still obtain meaningful results. Distributed models can
better represent the spatial variability of factors that
control runoff, and therefore, can be more accurate.
Finite element solution to the kinematic wave
equations is an efficient solution allowing large systems
to be solved quickly on a PC. Days of simulation can
be accomplished in seconds for large river
basins.VfloTM automatically routes runoff through
measured river cross-sections.
Model input consists of rain-rate maps at
variable or regular time increments. Data input for
this model, besides the rainfall input, is derived from
various commonly available sources of digital data.
Parameters include topography and drainage
networks derived from a digital elevation model
(DEM), infiltration derived from soils, and hydraulic
roughness derived from landuse/cover (Landsat).
Parameters may be input manually or via GIS grids.
Simulating runoff: Anywhere, Anytime!
Rainfall
Runoff rates
VfloTM APPLICATIONS
-Flood Risk and Flood Alert
-Event Reconstruction
-Water/Watershed Analysis
-Reservoir Operations
-Water Quality Management
-Urban Planning and Design
-Emergency Management
Hydrograph
VfloTM TECHNICAL SPECIFICATIONS
Hardware requirements, software performance and model results depend on user determined configuration. Technical
specifications provided are general guidelines derived from tested configurations. All editions require SVGA display
1024x768/ (24 bit or greater) and a CD-ROM drive. Useful data includes Soil map, Landuse/Landcover, Elevation,
Slope, Rainfall, and Channel Cross-sections.
VfloTM Basic
Free 30-day trial.Try a physics-based distributed hydrologic model. Create projects from ASCII parameters maps or by manual assignment. Input design storms or use radar rainfall as hydrologic input to your
basin.Demonstrate conservation of mass and momentum. Apply Green-Ampt infiltration settings, load
rating curves for measured cross-sections, set boundary conditions for controlled reservoirs or known
discharge, use stage-discharge relationships for detention ponds. Sample data and exercises provided.
Uses up to a 5K cell domain. OS Windows2000/XP-Processor PIII or greater-RAM 256 MB minimum/512MB recommended.
VfloTM Standard
Explore larger domains and apply a kinematic wave solution with modified Puls or looped rating curve
(Jones) options. Uses up to a 25K cell domain. OS Windows2000/XP-Processor PIII or greater-RAM
512MB minimum/1GB recommended.
VfloTM Professional
Unsurpassed power for high-resolution or large basin analysis. Includes snow melt, sensitivity analysis,
evapotranspiration and inundation mapping modules.Uses up to 70K+ cell domain. OS Windows2000/
XP-Processor PIV or greater-RAM 1GB minimum/system dependent.
VfloTM Real-time
Tailored hydrologic prediction systems for continuous operations.
For more information, contact :
Vieux & Associates, Inc.
Phone: 405-292-6259
1215 Crossroads Blvd., Suite 118
Norman, Oklahoma 73072-3359 USA Fax: 405-292-6258
jv@vieuxinc.com
www.vieuxinc.com
VfloTM November 2003