North Carolina
Attention!The application for this State is based on StreamStats version 2. Please read the new User Instructions for this application before attempting to use it. The new network navigation, estimating flows based on similar gages, and editing parameters and recomputing flows processes have not yet been implemented for North Carolina. These processes will be added in the near future. We want your feedback! Please send any comments or questions that you have on StreamStats to the StreamStats development team at GS-W StreamStats@usgs.gov. |
StreamStats for North Carolina can be used to estimate the magnitude of peak flows under natural streamflow conditions at the 2-, 5-, 10-, 25-, 50-, 100-, 200-, and 500-year recurrence-intervals for a pilot area limited to the upper French Broad River basin in western North Carolina. The report below presents the equations used to estimate the flow statistics, describes the errors associated with the estimates, and describes the methods used to develop the equations and to measure the basin characteristics used in the equations. Users should familiarize themselves with the report before using StreamStats to obtain estimates of streamflow statistics for ungaged sites.
Interactive Map
StreamStats for North Carolina was developed in cooperation with the North Carolina Department of Transportation (NCDOT). In 2007, the State of North Carolina completed development of a local resolution National Hydrography Dataset (NHD) product for 19 western counties. The NHD product was developed using the best available combination of digital orthophotography, digital terrain models derived from Light Detection and Ranging (LIDAR) technology and existing hydrography. The North Carolina StreamStats application uses the local resolution NHD product, 20-foot Digital Elevation Models (derived from LIDAR data), and the most current regional streamflow regression equations and datasets of landscape characteristics. Basin characteristics such as National Oceanic and Atmospheric Association rainfall data, topographic variables (for example slope and drainage area) and best available land cover classifications, were included. As part of the StreamStats development, the North Carolina Center for Geographic Information & Analysis (CGIA) partnered with NCDOT and the USGS on a pilot project to generate high resolution land cover data for use in StreamStats. CGIA used visible near-infrared ASTER satellite imagery from 2006 to generate a 10-class land-cover dataset for the upper French Broad River basin in the vicinity of Asheville and Hendersonville, North Carolina. Both the 2001 NLCD and 2006 ASTER land cover data are available in the pilot North Carolina StreamStats application.
The North Carolina StreamStats application also provides users with access to the most current local areal imagery and NCDOT roads layers for base maps through linkage with NC OneMap, which provides the most up-to-date geospatial data available in the state.
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