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APPLICATION OF TERRESTRIAL LiDAR IN ANALYZING THE RESTORATION OF AN URBAN STREAM

Abstract

LiDAR data is increasingly being used in the landscape change analysis though both aerial and terrestrial modes. This study presents the application of a terrestrial LiDAR to analyze the restoration of Klingle Creek Washington DC. Klingle Creek is a headwater stream of Rock Creek which drains the city of Washington. The stream was surveyed from the headwater to mouth using a terrestrial LiDAR before and after the restoration. These surveys included capturing of both the point cloud and orthophotos of the full length of the stream valley. The raw data was registered as a continuous point cloud of the stream valley for both pre and post restoration surveys. The registered point clouds were then used to create transects at 5-meter interval at the bankfull stage in the downstream direction. These transects were used to extract geomorphic data on the channel morphology. The channel morphologies for per and post restoration were compared to determine the impact of restoration on the channel morphology. This research offers a new high resolution terrestrial approach for reference data on local freshwater systems to better manage the local hydrology.

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