Tag: NHDPlus

Water Resources Layers on ArcGIS Online

Lost Run

Esri’s hosted content on ArcGIS Online now includes five new layers to use in your water resources maps and analyses. USA National Hydrography Dataset – High Resolution (USGS) USA Watershed Boundary Dataset (USGS) USA Polluted Waters (EPA) USA Polluted Waters … Continue reading

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Trace America’s Streams using Streamer, by USGS


The USGS National Geospatial Program is proud to announce the release of a dynamic map called Streamer, which allows a web user to map upstream and downstream traces and generate reports for each trace (including a map of the trace; its direction, … Continue reading

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EPA’s new app and website: How’s My Waterway?

How's my waterway?

by Brad Cooper, INDUS Corporation, Member of the EPA/How’s My Waterway Team EPA’s new app and website, How’s My Waterway, helps people find information on the condition of their local waterways using a smart phone, tablet, or desktop computer. It … Continue reading

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Attention all NHD Users!

The NHD Update tool v6.0.0 for ArcGIS 10.1 is in the final testing phase and will be officially released in February.  Subsequent versions of the ArcGIS 10.1 tool (v.6.0+) will include enhancements submitted by the stewardship community.  Release date for the first v6.0+ will be one-two months out from the February v6.0.0 release.  Note that only the most recent version of the NHD edit tool will be maintained/enhanced.  Issues reported regarding earlier versions, will be tested in the latest Beta version and resolved as necessary.

Please check back to the Hydro Resource Center for the final release!



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SSN and STARS: Tools for Spatial Statistical Modeling on Stream Networks

Temperature predictions on NHDPlus network.

By: Erin Peterson, Research Scientist, CSIRO Division of Mathematics, Informatics & Statistics Jay Ver Hoef, Research Statistician, NOAA National Marine Mammal Laboratory Spatial Autocorrelation in Streams and Rivers: Tobler’s first law of geography states that, ‘‘Everything is related to everything else, … Continue reading

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Texas Reservoir Sedimentation Study: ArcGIS Map Package now available!

Watershed Protection for Texas Reservoirs - Addressing sedimentation risk

by Ernest To1*, Carissa Belsky3, David Harkins1, Jim Patek2, Steve Stecher3, Mel Vargas2, Jennifer Walker4 1RPS Espey 2Parsons Corporation 3Crespo Consulting Services, Inc. 4Watearth, Inc. *corresponding author From 2011 to 2012, the Texas Water Development Board funded a study (TWDB … Continue reading

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NHDPlus Announcement!

NHDPlus V 2

by Cindy McKay, Horizon Systems Corporation, Member of the EPA/USGS NHDPlus Team A national compilation of the WBD snapshots used to build NHDPlusV2 has been assembled and is posted at: http://www.horizon-systems.com/NHDPlus/V2NationalData.php The data is posted in both shapefile and File … Continue reading

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National Hydrography Dataset Plus Version 2


by Tommy Dewald, USEPA Office of Water The National Hydrography Dataset Plus (NHDPlus) is a suite of geospatial products that build upon and extend the capabilities of the NHD (1:100,000 scale) by integrating it with the National Elevation Dataset (30M) … Continue reading

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Using NHDPlus to address sedimentation risks to water quality and availability in Texas reservoirs

by Ernest To* – RPS Espey, Carissa Belsky – Crespo Consulting Services, Inc., David Harkins – RPS Espey,

Jim Patek – Parsons Corporation, Steve Stecher – Crespo Consulting Services, Inc., Mel Vargas – Parsons Corporation,

Jennifer Walker – Watearth, Inc.

* =corresponding author

Sedimentation in Texas reservoirs is a significant problem that affects both water availability and quality in Texas.  The Texas Water Development Board estimates that Texas’ major reservoirs are losing 90,000 acre-feet per year due to sedimentation. This is equivalent to a loss of 4.5 million acre-feet by 2060 and exceeds the projected increase of 3.4 million acre-feet from new reservoirs.   The reduction in storage volume not only impacts water supply but also necessitates the alteration of supply infrastructure to handle deteriorating water quality.  Uncertainty regarding rainfall supply due to climate change further burdens the already stressed reservoirs.

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Hydrography Event Management Tool Version 2.5 is Now Available!

A new release of the Hydrography Event Management (HEM) Tool is available for ArcGIS 10. The HEM Tool provides full functionality for adding and editing events in the National Hydrography Dataset (NHD). Events are informational data that are linked to the NHD using a linear referencing on NHDFlowlines. The HEM tool handles all the linear referencing mechanics to make working with events simple. Hydrography events support many applications such as resource management, environmental protection, emergency response, fisheries and much more.

Hydrography event


Hydrography event


Hydrography event


Hydrography event 


Enhancements to Version 2.5 include:

  • Added a Pan button to candidate form.
  • Candidate form can list an additional attribute per event layer. Values from each event layer’s ‘Display  Expression’ field will be listed in the candidate form.
  • Import to Events – before starting batch import the tool will now verify the spatial reference of the data frame and the NHDFlowline feature class are exactly the same.
  • Import to Events will warn the user if they are about to apply approved imported events to a base table with the same name. Users have the option to stop or continue the process.
  • Import to Events can now transfer no fields, just the link field, or all fields. All fields only works for standard field types (string, date, and numeric). Blobs, OIDs, GUIDs and shape type fields will not transfer.
  • Create Multiple Events Downstream – Added new functionality (button) to create multiple downstream events from a point layer in the map. Not default on HEM toolbar, found under Customize > Commands > Categories > HEM > Batch Downstream from Points. Option to create overlapping or non-overlapping events from input points.
  • Import to Events QC and Batch Sync QC will now allow users to select multiple rows at once and approve them all.
  • SourceFeatureID now has an option to enforce unique IDs in event feature classes.

Find out more information and download the tool at: http://nhd.usgs.gov/tools.html.

An online demo of new features will be scheduled for the week of Oct 31st, email hem@usgs.gov to attend.

Special thanks to Ariel Doumbouya for providing this post. Questions for Ariel: hem@usgs.gov.

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