HYDRO20750

• Permit No: C1980007
• IBM Index Class Name: Hydrology
• Doc Date: 7/5/2005
• Doc Name: Evaluating the Effectiveness of Postfire Rehabilitation Treatments
• From: MCC
• To: DMG
• Permit Index Doc Type: Correspondence
• Media Type: D
• Archive: No

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mean=29 n=47
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Metamorphic Sedimentary Granitic Volcanic
Geologic Parent Material
Figure 13-Fire-induced water repellent soil areas and their geologic parent material for all
fires requesting BAER funding. Fire-induced water repellency was not significantly different
by parent material (t-test, a = 0.05).
productivity, and property. The latter category in-
cludeahomes, roads, cultural features, water supplies
and reservoirs, and agriculture.
Property, water quality, and soil productivity were
cited as reasons for conducting BAERprojects in about
a third of all projects (table 10). Region 5 (California),
with its high population, had the highest response (51
percent) for property, while sparsely populated Region
1 had the lowest.In terms ofproperty protection, made
and homes were mentioned moat frequently as rea-
sons for treatments in Region b (34 and 28 percent of
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20
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0 10 20 30 40 50 60 70 80 90 100
Water Repellent Area (%)
Figure 14-Fire-induced water repellent soil areas compared
to the estimated reduction in infiltration for all fires requesting
BAER funding. Regression line shows a poor correlation
between inereasetl water repellent soil areas and the reduction
in infiltration (R2= 0.31).
,:,
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~ n=125
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the BAER project responses, respectively) (table 11).
In the other regions, homes constituted a reason for
implementing BAER treatments in less than 11 per-
cent of the projects. Protection of homes was cited
more frequently in the 1990'e as a major fire suppres-
sionactivity objective than it was in previous decades.
It is very likely that the same will occur for future
BAER projects. Cultural features, water supplies, and
agriculture were listed as factors in BAER projects in
leas than 10 percent of the responses, except For agri-
culture in Region 2 (20 percent). Considering the
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Infiltration Reductlon (%)
Figure 1 estimated design peakflow change (log scale) due
to burned areas related to the estimated reduction In infiltration
for ali fires requesting BAER funding.
28 USDA Forest Service Gen. Tech. Rep. RMRS-GTRG3. 2000