Hydraulic modeling for lahar hazards at cascades volcanoes
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Abstract
The National Weather Service flood routing model DAMBRK is able to closely replicate field-documented stages of historic and prehistoric lahars from Mt. Rainier, Washington, and Mt. Hood, Oregon. Modeled time-of-travel of flow waves are generally consistent with documented lahar travel-times from other volcanoes around the world. The model adequately replicates a range of lahars and debris flows, including the 230 million km3 Electron lahar from Mt. Rainier, as well as a 10 m3 debris flow generated in a large outdoor experimental flume. The model is used to simulate a hypothetical lahar with a volume of 50 million m3 down the East Fork Hood River from Mt. Hood, Oregon. Although a flow such as this is thought to be possible in the Hood River valley, no field evidence exists on which to base a hazards assessment. DAMBRK seems likely to be usable in many volcanic settings to estimate discharge, velocity, and inundation areas of lahars when input hydrographs and energy-loss coefficients can be reasonably estimated.
Suggested Citation
Costa, J.E., 1997, Hydraulic modeling for lahar hazards at cascades volcanoes: Environmental & Engineering Geoscience, v. 3, no. 1, p. 21-30, https://doi.org/10.2113/gseegeosci.III.1.21.
ISSN: 1078-7275 (print)
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Hydraulic modeling for lahar hazards at cascades volcanoes |
| Series title | Environmental & Engineering Geoscience |
| DOI | 10.2113/gseegeosci.III.1.21 |
| Volume | 3 |
| Issue | 1 |
| Year Published | 1997 |
| Language | English |
| Publisher | Environmental Engineering Geologists |
| Contributing office(s) | Washington Water Science Center |
| Description | 10 p. |
| First page | 21 |
| Last page | 30 |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |