The Harlow Report

The Harlow Report-GIS

2023 Edition


ISSN 0742-468X
Since 1978
On-line Since 2000



first published week of:   01/23/2023

Woolpert Maps, Models California Reservoirs to Determine Capacity, Improve Water Resources Management

by Woolpert Press Release

The firm collected and integrated lidar and multibeam sonar data from Collins Lake and Lake Isabella.

Woolpert was contracted by the U.S. Army Corps of Engineers and Pro-ROV Services for the Browns Valley Irrigation District under separate contracts to collect and integrate lidar and multibeam sonar data. These data will be used to determine the accurate capacity of two California reservoirs and to support the management of water resources.

For the Browns Valley Irrigation District project, Woolpert collected lidar data via uncrewed aircraft system and acquired multibeam sonar data with a survey vessel. These data will be used to map and model Collins Lake, a reservoir located northeast of Sacramento in the foothills of the Sierra Nevada Mountains.

Under a separate contract, the Corps selected Woolpert to collect multibeam sonar data for capacity surveys conducted at Lake Isabella, east of Bakersfield. At the same time, Woolpert was under contract to fly topographic lidar over the region for the U.S. Geological Survey 3D Elevation Program. By combining the hydrographic data collected at Lake Isabella and integrating it with USGS lidar data, Woolpert developed a high-resolution digital elevation model of the reservoir and watershed to accurately determine the capacity of Lake Isabella. This opportunity to leverage two surveys produced a valuable dataset that will be used for many years.

 Read full story at Woolpert