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Web Tools intro.
This model archive describes approaches used by the U.S. Geological Survey in cooperation with CalTrans for assessing long-term annual yields of highway and urban runoff in selected areas of California with version 1.1.0 of the Stochastic Empirical Loading and Dilution Model (SELDM).
SPARROW mappers are interactive tools that allow users to explore river streamflow and nutrient and sediment loads and yields and the importance of different sources of contaminants in a particular river basin. Data can be visualized using maps and interactive graphs and tables, and rankings can be shown by state, major watershed, hydrologic unit (HUC), and catchment.
This portal contains video and photography of the seafloor and aerial imagery along much of the coastal U.S., and makes many video and photo datasets available to explore in an easy-to-use geospatial viewer. This portal serves imagery from the USGS's Coastal and Marine Hazards and Resources Program projects, hurricane and extreme storm research, and IOOS partner agencies.