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Hydrography change detection: the usefulness of surface channels derived From LiDAR DEMs for updating mapped hydrography

Journal of the American Water Resources Association

By:
, ,
DOI: 10.1111/jawr.12027

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Abstract

The 1:24,000-scale high-resolution National Hydrography Dataset (NHD) mapped hydrography flow lines require regular updating because land surface conditions that affect surface channel drainage change over time. Historically, NHD flow lines were created by digitizing surface water information from aerial photography and paper maps. Using these same methods to update nationwide NHD flow lines is costly and inefficient; furthermore, these methods result in hydrography that lacks the horizontal and vertical accuracy needed for fully integrated datasets useful for mapping and scientific investigations. Effective methods for improving mapped hydrography employ change detection analysis of surface channels derived from light detection and ranging (LiDAR) digital elevation models (DEMs) and NHD flow lines. In this article, we describe the usefulness of surface channels derived from LiDAR DEMs for hydrography change detection to derive spatially accurate and time-relevant mapped hydrography. The methods employ analyses of horizontal and vertical differences between LiDAR-derived surface channels and NHD flow lines to define candidate locations of hydrography change. These methods alleviate the need to analyze and update the nationwide NHD for time relevant hydrography, and provide an avenue for updating the dataset where change has occurred.

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Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Hydrography change detection: the usefulness of surface channels derived From LiDAR DEMs for updating mapped hydrography
Series title:
Journal of the American Water Resources Association
DOI:
10.1111/jawr.12027
Volume
49
Issue:
2
Year Published:
2013
Language:
English
Publisher:
American Water Resources Association
Publisher location:
Middleburg, VA
Contributing office(s):
Earth Resources Observation and Science (EROS) Center
Description:
19 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of the American Water Resources Association
First page:
371
Last page:
389