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The United States Geological Survey ((USGS)) is a publicly available source of remotely sensed hydrological data. Historical and real-time streamflow data are also available via the internet from sources such as the National Weather Service (NWS) and the United States Environmental Protection Agency (EPA). A benefit of using GIS softwares for ...
To date, the viewer has more than 700 regional maps, among which the following stand out: near-real-time daily flood maps and historic flood maps of Colorado University, biodiversity data from the North Andean area of the Nature Serve, coral reef maps of the Caribbean islands from the World Resources
FloodAlerts is a software application, developed by software specialists Shoothill, which takes real-time flooding information, and displays the data on an interactive Bing map, updating and warning its users when they, their premises or the routes they need to travel could be at risk of flooding.
Stage was traditionally measured visually using a staff gauge, which is a fixed ruler marked in 1/100 and 1/10 foot intervals, [3] however electronic sensors that transmit real-time information to the Internet are now used for many of these kinds of measurements. [4] The flood stage measurements are given as a height above or below the zero level.
The flash flood guidance approach to developing flash flood warnings rests on the real-time comparison of observed or forecast rainfall volume of a given duration and over a given catchment to a characteristic volume of rainfall for that duration and catchment that generates bank full flow conditions at the catchment outlet. If the observed or ...
The National Map Corps consists of volunteers who devote some of their time to provide cartographic information to the U.S. Geological Survey. The only requirements to participate are having access to the Internet and a current familiarity with the area being mapped. [6] This data is used to update The National Map.
More than 14 million U.S. properties are at risk of substantial flooding—and many homeowners don't even realize it.
Soil and Water Assessment Tool (SWAT) is a free and open source hydrology model and GIS computer simulation sponsored by the USDA. SWAT is a well known geographic hydrological model in use by many universities and government agencies around the world, and integrates with commercial products like ArcGIS .