In countries like the United States and Germany, well-funded federal agencies keep careful watch on the nation’s rivers, and disseminate their observations to the public. But in developing nations, many of the world’s major rivers remain un-gauged, despite the millions of people whose lives depend on them. The Dartmouth Flood Observatory hopes to help solve this problem with a concept they call “satellite gauging sites,” which makes it possible to monitor the flowrate of rivers using freely available satellite data, without the need to build or maintain expensive infrastructure.
They key to this method is the microwaves sensors carried aboard satellites like AMSR, TRMM, and GPM. As the amount of water on the landscape increases, emissions in the microwave spectrum decrease – a clear signal that can be used to track flowrate. Microwaves are unaffected by cloud, but absorbed by liquid water, which means that Flood Observatory scientists can monitor river conditions even when the ground is visibly obscured by weather.
The numerical estimates are much less accurate than ground-based gauging, of course, but still extremely valuable. As a relative estimate of how the flowrate is changing over time, they can be used to track droughts and floods, and to analyze long-term changes in the flow regime.
In order to make them more easily available to the GIS community, Esri has added these satellite gauging sites to the Live Stream Gauge map. When you click on one, it displays an estimate of today’s average flowrate, a description of the status (e.g. low flow, moderate flood, major flood), and a graph showing the time series. There is also a link to the station page, where you can get monthly and annual flow estimates, as well as some information about the calibration and accuracy of that particular site.
This latest update also included new contributions from England’s Environment Agency, the State of Nebraska, the State of Oregon, and the Iowa Flood Center – over 3000 new gauges in total – so if you haven’t checked it out in a while, now is a great time to take another look. For those of you who have been using this map, please let us know your thoughts about it in the comments. Thank you to all our stream gauge contributors!
For the first time ever, you can visualize NOAA’s stream-flow forecasts throughout the continental U.S. in ArcGIS Online, ArcGIS for Desktop or freely via the REST endpoint. By accessing the National Water Model map services, hosted on Esri’s livefeeds2.arcgis.com server, … Continue reading
Collector for ArcGIS is adding exciting new capabilities to the next release that let you map your asset data (hydrant, meters, valves, pipes, signs, and more) with a precise spatial location. Travis Anderson, an engineer with Le-Ax Water District in … Continue reading
February 2016 Local Government, State Government, Emergency Management, Water, Gas and Electric Solution Updates
At the end of February, 5 new solution products were added to ArcGIS, 26 existing solution products were updated and 1 solution product entered the Mature lifecycle phase. Solution products included with ArcGIS are ready-to-use maps and apps that reduce … Continue reading
We’re doing some research into how the Attribute Assistant is being used. We’d like to see what rules you are using and how you configured your dynamic value table.
This information will help us plan for the future. We want to know what are the most common rules. We also want to see your gnarly and complicated rules to see how far the Attribute Assistant is being pushed.
So please share your dynamic value table along with any comments you have in this thread on GeoNet. We appreciate your help on this effort!
PS: If you don’t know what the Attribute Assistant is (or aren’t sure if you are using it already) no worries. You can learn more about Attribute Assistant on the ArcGIS Solution site here.
by Sinan Abood, Spatial Analyst – ORISE Research Fellow, USDA Forest Service Riparian ecosystems provide many physical, ecological, and biological functions of economic and social value, serving as the zone of interaction between streams and the terrestrial ecosystems around them. … Continue reading
by Rajan Ray, Director of Marketing and Client Service Manager, Innovyze On any given day, if you perform a google search on “water main break” you will find a long list of recent news coverage documenting the ensuing damages including … Continue reading
In recent years, Denmark has experienced a number of sudden, extreme rainfall events. These events, known as cloudbursts, overwhelm stormwater systems and cause flood damage to homes and businesses. One way to help municipalities prepare for the next cloudburst is … Continue reading
Conserving water is a strategic priority for many water utilities, especially those facing drought. Yet conservation is complex. There are too many moving pieces to have a single, silver-bullet solution. To conserve water in an appreciable way, your utility must focus on increasing water efficiency and reducing customer demand.
You can do both with ArcGIS. Map-based visuals, spatial analytics, and collaboration capabilities help you deploy proven workflows, templates, and applications that save water. Continue reading