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Hydrology, watersheds, sedimentation


The Valley Confinement Algorithm (VCA) is a GIS based program that uses NHDPlus data to delineate unconfined valley bottoms. This webpage provides access to the VCA ArcGIS Toolbox script and documentation describing the program.
Spatial statistical models for streams provide a new set of analytical tools that can be used to improve predictions of physical, chemical, and biological characteristics on stream networks. The Spatial Tools for the Analysis of River Systems (STARS) and Spatial Stream Network (SSN) models are unique because they account for patterns of spatial autocorrelation among locations based on both Euclidean and in-stream distances
Thermal regimes are important to aquatic ecosystems because they strongly dictate species distributions, productivity, and abundance. The stream temperature modeling and monitoring web site provides resources to help those in the western United States organize temperature monitoring efforts, describes techniques for measuring stream temperatures, and describes several statistical models for predicting stream temperatures and thermally suitable fish habitats from temperature data.
Our objective was to develop a consistent nationwide assessment of risk of impaired watershed condition for the nearly 4000 5th-level (10-digit) watersheds containing National Forest System (NFS) land in the contiguous 48 states.
The objective of this project is to quantify seasonal patterns of carbon fluxes in two dominant marsh types in the Florida Everglades: short- and long- hydroperiod Everglades marshes.