EPA (Environmental Protection Agency) Complex Terrain Model Development: third milestone report 1983. Interim report Jun 82-Jun 83

The U.S. Environmental Protection Agency is sponsoring the Complex Terrain Model Development program, a multi-year integrated program to develop and validate practical plume dispersion models of known reliability and accuracy for simulating one-hour-average ground-level concentrations downwind of elevated sources during stable atmospheric conditions in complex terrain. The first major component of the Complex Terrain Model Development program was a field study conducted during the fall of 1980 at Cinder Cone Butte, a roughly axisymmetric, isolated 100-meter-tall hill located in the broad Snake River Basin near Boise, Idaho. The second field study was performed during 1982 at Hogback Ridge, an 85-meter-tall two-dimensional ridge located west of Farmington, New Mexico. This report documents work performed subsequent to the Second Milestone Report to combine two preliminary complex terrain models developed from the Cinder Cone Butte data base into the Complex Terrain Dispersion Model (CTDM), and to contrast the performance of CTDM with three existing complex terrain models using measurement data from both the Cinder Cone Butte and the Hogback Ridge field experiments. A description of the Hogback Ridge field study is also included.