2004 UC Proceedings Abstract
Comparison of LIDAR-Generated Channel Features With On-Ground Surveys Track: Water Resources Author(s): Brian Dietterick Channel features are currently measured using ground survey techniques to monitor channel change and evaluate potential adverse impacts associated with land management activities. Light Detection and Ranging (LIDAR) is an airborne laser altimetry technology that is used to create high-resolution digital elevation models (DEMs). Questions remain about the ability of using LIDAR-generated channel features to quantify channel morphologic characteristics for the purpose of monitoring and detecting change. Channel features were surveyed using a total station at six study reaches in the Little Creek Watershed, as part of a long-term monitoring study at Cal Poly's Swanton Pacific Ranch. LIDAR data was collected for the Little Creek watershed and channel features were extracted from the raw LIDAR data. Comparisons were made between ground surveyed and the LIDAR-generated features, including channel cross sections, longitudinal profiles, and meander geometry at the six reaches, to evaluate the applicability of using LIDAR data in channel studies. Brian Dietterick Cal Poly NRM NRM Dept., Cal Poly San Luis Obispo , CA 93465 US Phone: 805.756.6155 Fax: 805.756.1402 E-mail: bdietter@calpoly.edu |
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