Data Files for USGS Response to Hurricane Maria Flooding in Puerto Rico and Characterization of Peak Streamflows Observed September 20-22, 2017
Dates
Publication Date
2022-06-29
Start Date
2017
End Date
2019
Citation
Gómez-Fragoso, J., and Smith, M., 2022, Data files for USGS response to Hurricane Maria flooding in Puerto Rico and characterization of peak streamflows observed September 20–22, 2017: U.S. Geological Survey data release, https://doi.org/10.5066/P908UR17.
Summary
This data release provides topographic (horizontal and vertical) data for 78 sites, surveyed from November 2017 to July 2019 as part of documentation of flooding that occurred in Puerto Rico during and after Hurricane Maria (September to November 2017). Hurricane Maria made landfall the Island of Puerto Rico on September 20, 2017 and was one of the deadliest storms in U.S. history. The U.S. Geological Survey (USGS) personnel conducted topographic surveys at selected stream sites to facilitate hydraulic modeling of peak streamflows (or discharges) – termed indirect measurements – using published standard USGS methods and hydraulic modeling studies to establish new stage-discharge relations for sites at which flooding substantially changed [...]
Summary
This data release provides topographic (horizontal and vertical) data for 78 sites, surveyed from November 2017 to July 2019 as part of documentation of flooding that occurred in Puerto Rico during and after Hurricane Maria (September to November 2017). Hurricane Maria made landfall the Island of Puerto Rico on September 20, 2017 and was one of the deadliest storms in U.S. history. The U.S. Geological Survey (USGS) personnel conducted topographic surveys at selected stream sites to facilitate hydraulic modeling of peak streamflows (or discharges) – termed indirect measurements – using published standard USGS methods and hydraulic modeling studies to establish new stage-discharge relations for sites at which flooding substantially changed the pre-existing relation. Indirect (post-flood) measurements are used to characterize flood peaks that could not be determined using direct methods (for example current-velocity meters, hydro-acoustic instruments or established stage-streamflow relations) because flood conditions exceeded the capabilities of those methods, streamgage sites could not be accessed during flooding, or safety issues precluded access by USGS personnel during flooding. The standard-step hydraulic method, often referred to as the step-backwater method, is a widely accepted one-dimensional hydraulic model to determine (theoretical) water-surface elevations at a location of interest for specified streamflows.
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Related External Resources
Type: Related Primary Publication
Gómez-Fragoso, J., Smith, M., and Santiago, M., 2022, U.S. Geological Survey response to Hurricane Maria flooding in Puerto Rico and characterization of peak streamflows observed September 20–22, 2017 (ver. 1.1, July 2022): U.S. Geological Survey Scientific Investigations Report 2022–5040, 105 p., 6 app., 1 pl., https://doi.org/10.3133/sir20225040.
The purpose for this metadata is to describes the datasets containing topographic data surveyed from 2017 through 2019 to determine peak streamflows that occurred during and after Hurricane Maria at 20 streamgage sites, and to topographic points needed to develop new theoretical stage-streamflow relations at 59 streamgage sites. Data are compiled in comma-delimited (.csv) files for each site. Each site data set includes columns with: 1) USGS station number; 2) a point identifier that describes the point; 3) horizontal (easting and northing) coordinates for all surveyed points, surveyed in either North America Datum (NAD) of 1983 or an arbitrary datum; 4) elevation values for all surveyed points, surveyed in either Puerto Rico Vertical Datum of 2002, an arbitrary datum or assigned datum of the streamgage at which the survey was conducted; and 5) any code associated with each point, as documented by the survey team. A supporting file provides explanatory information about each dataset.
