The U.S. Geological Survey (USGS) has released new interactive mappers and models for its online SPAtially Referenced Regression On Watershed attributes (SPARROW) tool. The new models estimate streamflow and the concurrent yields of total nitrogen, total phosphorus, and suspended sediment in both monitored and unmonitored inland stream reaches across the country as they feed into […]
Selecting the best-suited model to support stormwater projects can be complicated. Today’s water quality managers must not only be able to predict peak flow rates, runoff volumes, and receiving water quality, they must also navigate stringent regulatory requirements and varying levels of resources. The Water Environment Federation’s (WEF; Alexandria, Va.) newest publication, Stormwater, Watershed, and […]
In the lowest and most arid parts of the Colorado River basin, moisture from the ground rises into the atmosphere before condensing rapidly to form frequent and sudden thunderstorms. These storms, which typically control the flow of runoff, provide irrigation for river-bank plants, supplement water supplies, and affect the chance that the river will flood, […]
When Esri (Redlands, Calif.) first released the ArcGIS spatial analysis platform in 1999, it empowered users to visualize abstract data in a way that put computer-assisted watershed planning (literally) on the map. Just under two decades later, the open-source platform now enables seamless map-sharing, intuitive rendering features, and has inspired a dedicated circle of coders […]
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