Often holding more sediment and rock than water ... Their steepness defines their “angle of repose,” a geologic concept critical to catastrophic debris flows. It’s the steepest angle ...

Often holding more sediment and rock than water ... Their steepness defines their “angle of repose,” a geologic concept critical to catastrophic debris flows. It’s the steepest angle ...

And those broad alluvial fans are expert at what geologists call entrainment — water, mud, sediment and boulders ... Their steepness defines their “angle of repose,” a geologic concept ...

Often holding more sediment and rock than water ... Their steepness defines their “angle of repose,” a geologic concept critical to catastrophic debris flows. It’s the steepest angle at which material ...

As a principal engineer for the county’s Public Works Department, Klippel’s job is to try to stop catastrophic flows of mud, debris and boulders that could rush into fire-stricken ...

The pile would become slightly shorter as it became broader at its base. The concept is known as the angle of repose, that place where movement ceases and the material is at rest, so to speak.