Spatial analysis with GIS plays a key role in many of RTi's projects. Spatial data are used as inputs to river forecasting models and are created and maintained with GIS. Our modelers rely on the results from GIS analysis of hydrologic and climatic spatial data to calibrate sub-basin river forecast models. RTi also uses GIS to create maps to visualize basin features, topography, and climatic data.

Flood Inundation Mapping

This picture was developed using the ESRI GIS technology combined with National Weather Service FLDWAV program, which is a one-dimensional dynamic streamflow routing model. This methodology is applicable to other one-dimensional models, such as UNET and HEC-RAS, which is included in RTi's RiverTrak system. RTi also offers two-dimensional routing solutions. Flood inundation maps can be produced to identify the extent of flooding at a given point in time or the maximum extent of flooding over an entire event. Maps can be produced to show the extent of flooding for a historical event or to simulate future events.

GIS Capabilities and Services

• Technical Capabilities
  and Software
• ArcIMS Implementations
• Spatial Analysis
  
• Remote Sensing
• GIS Interface Design