Project Description:

In March of 2007, Department of Water Resources (DWR) announced a partnership with the Water Resources Institute to coordinate the Alluvial Fan Task Force (AFTF). The Director of DWR appointed 33 members to the Task Force including county supervisors, local flood managers, developers, land use/environmental interests and representatives of state and federal agencies. The members were charged with developing a Model Ordinance and local planning tools that would provide a model for future land use decisions on alluvial fans that are non-prescriptive and flexible, allowing local governments to adapt to their local conditions and each development. (more information…)

Products + Outcomes:

These ordinances and tools are aimed at minimizing public and private losses and damages that may result from the flood risks and related hazards posed by development located on alluvial fans and giving consideration to the beneficial floodplain and other values that enhance the sustainability of watersheds. A subset of the local planning tools where automated into a web application. This application creates a top level profile of any area in California. From that profile one could then diagram their proposed landuse and receive realtime hazard analysis. Most innovative is the user’s ability to easily take on more or less risk in any particular hazard and lack of specificity of goals and geography — one tool many goals in many places.

Project Details


California Department of Water Resources








ArcGIS, .NET, HTML5/Javscript