Skip to main content
U.S. flag

An official website of the United States government


Here you will find publications, reports and articles produced by National Geospatial Program (NGP) scientists. For a comprehensive listing of all NGP publications please click on each of the pubs listed below.

12-digit hydrologic unit outlet (pour) points for the NHDPlus V2.1 WBD snapshot

This USGS data release consists of three datasets representing three derived outlets or "pour points" for each 12-digit hydrologic unit (HU12) in the Watershed Boundary Dataset (WBD) snapshot delivered with NHDPlus V2.1. The three related pour point locations, each delivered in a stand-alone dataset, are: "from" (fpp) and "to" (tpp) points that identify the location w

A Selective Drainage Toolbox to Hydroenforce Culverts and Other Features in Lidar-Derived Digital Elevation Models

This is release 1.0 of the Selective Drainage Toolbox. These tools are designed to be accessed using ArcGIS Desktop software (versions 9.3.1 to 10.4.1). The toolbox is composed of a collection of custom tools that implement geographic information system (GIS) techniques that can be used to identify and enforce drainage hydro features in digital elevation models- with a specific applicability to hi

Data validating computation of boundary roughness from QL2 lidar derived digital elevation models for 2D hydraulic modeling applications

Calibration of hydraulic models require careful selection of input parameters to provide the best possible modeling outcome. Currently the selection of hydraulic resistance or 'n' values for these models is a subjective process potentially exposing models to critical review . A process is needed to objectively estimate n-values so everyone responsible for model calibration arrives at the same an

Pb isotope measurements of road dusts and background geologic materials in the Viburnum Trend resource extraction area of southeast Missouri (2011)

The isotopic composition of Pb in fugitive dust suspended by a vehicle from 13 unsurfaced roads in Missouri was measured to identify the source of Pb within an established long-term mining area. A three end member model using 207Pb/206Pb and concentration as tracers resulted in fugitive dust samples plotting in the mixing field of well characterized heterogeneous end members. End members selected