Abstract
View Presentation3D Modeling of Ground Subsidence
Track: Engineering and Engineering Design
Author(s): Ernest Sinohui
The Central Arizona Project (CAP) has experienced a decrease in available free-board and flow capacity for its concrete canal as it traverses through the Northern portion of Phoenix, Arizona. The problem of ground subsidence has caused CAP to add additional height to its canal, upward of 3 feet has been added. To develop a schedule for phasing and location of future construction projects, CAP has contracted with GeoTrans and Tetra Tech to investigate the extent and severity of ground subsidence within Pools 23 and 24 (32 km x 16 km). The project started with the first GPS survey in the spring of 2003 and is conducted every 6 months. Vertical differences of these GPS points, the use of InSAR data and gravity surveys along with the 3D modeling capabilities of the GIS have provided CAP with a prediction of problem areas and effort of construction.
Ernest Sinohui
Tetra Tech
GIS RS Survey and Mapping
33 North Stone Ave
Tucson, AZ 85701
US
Phone: 520-623-7980
E-mail: ernest.sinohui@tetratech.com