Geologic, Hydrologic, and Urban Hazards for Design in Desert Environments - Design with the Desert: Conservation and Sustainable Development - page 98

110°44'45°W 110°44'15°W

Start of deposition zone

Soldier
Canyon

32°18'30°N

N

500 ft

Debris-flow volumes modeled

Volume of 2006 slope failures:
79,000 yd 3

Observed debris-flow snout

Othe r mode led volumes:

79,000 yd 3
26,000 yd 3

32°18N

260,000 yd 3

FIGURE 5.5
Modeling of debris-flow hazard at Soldier Canyon, southern Santa Catalina Mountains, using LAHARZ. (From
Magirl, C.S. et al., Geomorphology , 119, 111, 2010.)

potential. Careful consideration should be given to the potential for debris flows upslope
of subdivision development when hydrologic design is used for constructed drainage
channels to mitigate the potential for channel aggradation, either from debris flows or
the typical processes that deliver sediment from headwaters to terminus in ephemeral
streams.