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Item Information

snippet:	The NHD is a national framework for assigning reach addresses to water-related entities, such as industrial discharges, drinking water supplies, fish habitat areas, wild and scenic rivers. Reach addresses establish the locations of these entities relative to one another within the NHD surface water drainage network, much like addresses on streets. Once linked to the NHD by their reach addresses, the upstream/downstream relationships of these water-related entities--and any associated information about them--can be analyzed using software tools ranging from spreadsheets to geographic information systems (GIS). GIS can also be used to combine NHD-based network analysis with other data layers, such as soils, land use and population, to help understand and display their respective effects upon one another. Furthermore, because the NHD provides a nationally consistent framework for addressing and analysis, water-related information linked to reach addresses by one organization (national, state, local) can be shared with other organizations and easily integrated into many different types of applications to the benefit of all. Last updated by DCNR: August 3, 2021 from https://apps.nationalmap.gov/downloader/#/. Additional information available at https://www.usgs.gov/core-science-systems/ngp/national-hydrography/national-hydrography-dataset?qt-science_support_page_related_con=0#qt-science_support_page_related_con
summary:	The NHD is a national framework for assigning reach addresses to water-related entities, such as industrial discharges, drinking water supplies, fish habitat areas, wild and scenic rivers. Reach addresses establish the locations of these entities relative to one another within the NHD surface water drainage network, much like addresses on streets. Once linked to the NHD by their reach addresses, the upstream/downstream relationships of these water-related entities--and any associated information about them--can be analyzed using software tools ranging from spreadsheets to geographic information systems (GIS). GIS can also be used to combine NHD-based network analysis with other data layers, such as soils, land use and population, to help understand and display their respective effects upon one another. Furthermore, because the NHD provides a nationally consistent framework for addressing and analysis, water-related information linked to reach addresses by one organization (national, state, local) can be shared with other organizations and easily integrated into many different types of applications to the benefit of all. Last updated by DCNR: August 3, 2021 from https://apps.nationalmap.gov/downloader/#/. Additional information available at https://www.usgs.gov/core-science-systems/ngp/national-hydrography/national-hydrography-dataset?qt-science_support_page_related_con=0#qt-science_support_page_related_con
accessInformation:	See dataset specific metadata.
thumbnail:
maxScale:	5000
typeKeywords:	[]
description:	<DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system. NHD data was originally developed at 1:100,000-scale and exists at that scale for the whole country. This high-resolution NHD, generally developed at 1:24,000/1:12,000 scale, adds detail to the original 1:100,000-scale NHD. (Data for Alaska, Puerto Rico and the Virgin Islands was developed at high-resolution, not 1:100,000 scale.) Local resolution NHD is being developed where partners and data exist. The NHD contains reach codes for networked features, flow direction, names, and centerline representations for areal water bodies. Reaches are also defined on waterbodies and the approximate shorelines of the Great Lakes, the Atlantic and Pacific Oceans and the Gulf of Mexico. The NHD also incorporates the National Spatial Data Infrastructure framework criteria established by the Federal Geographic Data Committee.</SPAN></SPAN></P><P /><P STYLE="font-weight:bold;margin:0 0 11 0;"><SPAN><SPAN>Modifications by DCNR:</SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN STYLE="font-weight:bold;"><SPAN>Field Additions: </SPAN></SPAN><SPAN><SPAN>“Hydro Category”, “Hydro Subcategory”, "Length (Miles)"</SPAN></SPAN></P><P STYLE="font-weight:bold;margin:0 0 11 0;"><SPAN><SPAN>Field Modifications:</SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN STYLE="text-decoration:underline;"><SPAN>“Hydro Category” </SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Copied ‘FType’ subtypes to ‘HydroCat’ field: </SPAN></SPAN><SPAN STYLE="font-weight:bold;"><SPAN>‘</SPAN></SPAN><SPAN><SPAN>CanalDitch’, ‘Connector’, ‘Creek’, ‘Pipeline’, ‘Slough’, ‘Stream’, ‘River’, ‘Underground Conduit’.</SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN STYLE="text-decoration:underline;"><SPAN>“Hydro Subcategory” </SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Copied and simplified ‘FCode’ subtypes to ‘HydroSubCat’ field: ‘Aqueduct’, ‘Ephemeral’, ‘General Case’, ‘Intermittent’, ‘Other River’, ‘Penstock’, ‘Perennial’, ‘Siphon’, ‘Stormwater’, ‘Underground Conduit’.</SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN STYLE="text-decoration:underline;"><SPAN>"Length (Miles)"</SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Used field geometry calculator to calculate river mileage for NAD 1983, Zone 11N. </SPAN></SPAN></P><P STYLE="font-weight:bold;margin:0 0 11 0;"><SPAN><SPAN>Selected, merged and attributed large, named rivers:</SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Selected named rivers using the definition query: “GNIS_Name LIKE '%River%'”</SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>Merged all features by name, attributed as “River” in Hydro Category field:</SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>List of named rivers:</SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN><SPAN>'Amargosa River', 'Bill Williams River', 'Bruneau River', 'Carson River', 'Colorado River', 'East Channel Marys River', 'East Fork Carson River', 'East Fork Jarbidge River', 'East Fork Marys River', 'East Fork Quinn River', 'East Walker River', 'Franklin River', 'Humboldt River', 'Jarbidge River', 'Kings River', 'Lake Fork West Owyhee River', 'Little Humboldt River', 'Little Owyhee River', 'Little Truckee River', 'Little Walker River', 'Marys River', 'Middle Fork Owyhee River', 'Moon River', 'Muddy River', 'North Fork Humboldt River', 'North Fork Little Humboldt River', 'North Fork Owyhee River', 'North Twin River', 'Owens River', 'Owyhee River', 'Quinn River', 'Reese River', 'South Branch Carson River', 'South Fork Humboldt River', 'South Fork Little Humboldt River', 'South Fork Owyhee River', 'South Fork Quinn River', 'South Fork South Twin River', 'South Twin River', 'Susan River', 'Truckee River', 'Upper Truckee River', 'Walker River', 'Virgin River', 'West Fork Carson River', 'West Fork of Old River', 'West Little Owyhee River', 'West Fork West Walker River', 'West Marys River', 'West Walker River', 'White River'.</SPAN></SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN STYLE="font-weight:bold;"><SPAN>Turned off following fields: </SPAN></SPAN><SPAN>‘ReachCode’, 'FlowDir', ‘WBArea_Permanent_Identifier’, ‘FType’, ‘FCode’, ‘MainPath’, ‘InNetwork’, ‘VisibilityFilter’, ‘Shape_Length’.</SPAN></P></DIV></DIV></DIV>
licenseInfo:	<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>None. Acknowledgment of the originating agencies would be appreciated in products derived from these data.</SPAN></P></DIV></DIV></DIV>
catalogPath:
title:	NHD_StreamsAll_USGS
type:
url:
tags:	["Hydrography","Stream","River","Canal","Ditch","Reservoir","Artificial Path","Reach Code"]
culture:	en-US
portalUrl:
name:
guid:
minScale:	150000000
spatialReference: