Spatial Water Data Subcommitte Update to the FGDC CAG Bob Pierce, DOI Tod Dabolt, EPA

Vision for a National Geospatial Surfacewater Framework - Mission Accomplished? NHD NED WBD

National Hydrography Dataset Seamless National Coverage Managed by Hydrologic Units National Consistency Uniform Characteristics Advanced Geospatial Model Relational/Feature Based Living Database Designed for Updates Through Data Stewardship Analytical Capabilities Flow Network/Linear Referencing

Example of National Hydrography Dataset

Medium Resolution NHD

High Resolution NHD

Local Resolution NHD

Integration of NHD and WBD

What is NHDPlus? An integrated suite of application-ready geospatial data sets that incorporate many of the best features of the National Hydrography Dataset (NHD) National Elevation Dataset (NED) Watershed Boundary Dataset (WBD) NHDPlus includes - improved NHD names and networking, value-added attributes (such as stream order) that enable advanced query, analysis and display, elevation-derived catchments that integrate the land surface with the network, catchment attributes (such as temperature, precipitation, land cover), stream flow volume and velocity estimates for pollutant dilution modeling, and associated flow direction and accumulation grids.

The inset map shows the watershed (white boundary) defining the drainage area upstream from the mouth of Four Mile Run (red dot) and a report of associated watershed characteristics – both produced using NHDPlus.

National Hydrography Dataset The Hydrography component of The National Map Surface Water of the United States 1:100,000-scale content - 2001 1:24,000-scale content - 2007 1:4,800-scale content - ongoing

National Hydrography Dataset The Hydrography component of The National Map Surface Water of the United States 1:100,000-scale content - 2001 1:24,000-scale content - 2007 1:4,800-scale content - ongoing

Combination of U.S. – Canada Hydrography St. Croix Subbasin, Maine-New Brunswick This is an example of the joint U.S. – Canadian St. Croix subbasin between Maine and New Brunswick. The hydrography is well-harmonized and looks uniform despite the fact that it came from two mapping programs.

Stewardship Model MAINE CALIFORNIA NEW YORK U.S. FOREST SERVICE SAN FRANCISCO BAY ESTUARY INSITUTE CITY OF NEW YORK MAINE CALIFORNIA NEW YORK U.S. FOREST SERVICE ALABAMA COLORADO USGS Bureau Land Management UTAH ARKANSAS DEPARTMENT ENVIRONMENTAL QUALITY KANSAS STATE ENGINEER’S OFFICE

The Watershed Boundary Dataset Drainage to a point Drainage boundaries for all surface areas Impartial to boundaries, projects, programs, or agencies Meets the National Standards for Spatial Data Accuracy (NSSDA) Uses DOQQ’s or higher resolution imagery, contours of elevation, stream locations and other data to improve accuracy or currency And carries a suite of useful attribution Also, could add carries a suite of useful attribution

WBD Completed The nationally consistent and seamless WBD is now completed for the lower 48 states, Hawaii, Puerto Rico and the Virgin Islands, with Alaska to follow this Fall. This significant accomplishment was achieved through partnerships of 10 Federal agencies, 8 different state agencies, local organizations, universities, and Tribes in all 50 states and U.S. territories. The Watershed Boundary Dataset complements the NHD and supports numerous programmatic missions and activities including: watershed management, rehabilitation, and enhancement aquatic species conservation strategies flood plain management and flood prevention water-quality initiatives and programs dam safety programs fire assessment and management resource inventory and assessment water data analysis water census

Next year we will have a combined WBD and NHD A new way of thinking about Hydrography

Watershed Boundary Dataset integration with the National Hydrography Dataset

Benefits of a joint WBD/NHD NHD and the WBD naturally complement each other Both are used extensively in hydrology, biology, resource management, and pollution control Improves interoperability of the two datasets, and for users A single hydrography geodatabase facilitates all aspects of joint stewardship of the two feature databases-NHD and WBD Joint data distribution services Joint stewardship operations Joint program management Combined operations to the extent possible Many positive outcomes to have WBD become part of The National Map (TNM) NHD GeoEdit tool could accommodate WBD edits and provide feature level metadata tracking

Stewardship Stewardship is a partnership between local, state and federal entities to ensure that WBD and NHD data is current, available, and relevant. NATIONAL RESPONSIBILITIES: Provide program leadership and management Work with state stewards to ensure success of WBD/NHD stewardship objectives Ensure “certification” integrity is maintained in WBD Assist with technical issues Support successful integration of NHD and WBD stewardship DOI recognizes WBD as an authoritative dataset, 2007 Geospatial Blue Print, Table 2.2 USFS-NRIS, NRCS and BLM also key dataset to tie their data to

International Border Harmonization U.S./Canada U.S./Mexico

WBD Coastal Modifications Washington coast after the 3-nm NOAA marine boundary was applied for the outer limit of the HU. No nearshore limit was applied

Integration with Geographic Names Information System (GNIS) Integration Arizona,