Regional frequency analysis of peak flows at Zion National Park and vicinity areas, Utah
Diaz GE and Salas JD. 1994. Regional frequency analysis of peak flows at Zion National Park and vicinity areas, Utah. Technical Report No. 2. Computing Hydrology Lab, Hydrologic Science and Engineering Prog, Engineering Research Center, CSU. Fort Collins, Colorado
The main purpose of this study was the implementation of a regional flood frequency analysis for Zion National Park and vicinity areas. Two regional models were implemented based on the multivariate lognormal distribution that explicitly accounts for the space correlation among series of annual peaks in the region. The parameters of the regional models were estimated using the maximum likelihood procedure based on the observed series of peaks from a subset of stations that are known to preserve the assumed structure of the regional models. The models have the capability to estimate flood quantiles (maximum instantaneous peaks ) at ungaged river sites based on readily available geographical and meteorological information. Moreover, the models can also be used to increase the reliability of estimated quantiles at sites with very short records. The regional models showed very good fitting capabilities when compared with empiricial frequency distributions at three selected stations representative of catchments at low, intermediate and high elevation areas of the Upper Virgin River Basin.
- Type
- Published Report
- Authors
- Diaz, Gustavo; Salas, Jose
- Date of Issue
- 1994-05
- Publisher
- Computing Hydrology Lab, Hydrologic Science and Engineering Prog, Engineering Research Center, CSU
- Units
- WRD , ZION
- Keywords
- Clemson, Distribution, Flooding, Frequency analysis, Gaging Stations, Hydrology, peak flows, Precipitation, Upper Virgin River Basin, Water Resources, WRBIB