Water Resources Program 2019-2021

Key Project:

Develop Chemung River Flood Inundation Mapping


Priority Water Resources Need:

Improve Community Flood Preparedness


Project Location:

Chemung and Steuben County, New York


Project Lead:

Project Description:

digital view of flooding The southern tier of New York has experienced significant flooding in recent years, most notably in 2006 and 2011. The New York Silver Jackets team will be developing a flood inundation mapping tool for the Chemung River watershed, from the Susquehanna River confluence in Athens, Pennsylvania upstream to Corning, New York, including 40 miles of the Chemung River. The maps will show an expected area and depth of flooding based on observed and forecasted river stages for the Chemung River at Chemung, Elmira, and Corning stream gages. The maps will be available on the National Oceanic Atmospheric Administration Advanced Hydrologic Prediction System (AHPS) website and serve as a valuable flood preparedness tool for emergency managers and the public. SRBC, in collaboration with agency partners, will provide technical assistance on model development, report preparation, and public outreach.


Challenges:
  • Ensuring continuity of flood mapping between multiple river forecast points
  • Communicating flood risk in levee protected areas
  • Communicating flood risk below flood control reservoirs
  • Convincing stakeholders to use mapping for flood preparedness

Key Milestones:
  • •  Complete Hydraulic Modeling
    (September 2018)
  • •  Develop Depth Grids and Inundation Layers
    (December 2018)
  • •  Deploy Maps on AHPS Website
    (March 2019)
  • •  Complete Project Outreach
    (September 2019)