Effect of June 26, 1996 storm: some rilling in open areas, length
controlled by occurrence of boulder patches, rills only in areas without
stone cover.
Site Number: 4
Fire Intensity: high
Slope: 19%
Rock Cover: not observed
Needle Cast: sparse
Ash depth, color, and moisture: 0-3 cm, black, moist only at
surface
Soil and Moisture: 3+ cm silty sand, slightly moist
Hydrophobicity: none
Root mat condition: not observed
Distance from Boundary Peak trail head: 1525 m
Effect of June 26, 1996 storm: no rilling or sheetwash
Site Number: 5
Fire Intensity: high (4-cm diameter tree branches consumed)
Slope: 18%
Rock Cover: pumice blanket
Needle Cast: none
Ash depth, color, and moisture: 0-3 cm, black ash and pumice,
dry
Soil and Moisture: 3-6 cm, brown silt, slightly moist; 6-10,
cm light tan, dry, hydrophobic silt; 10+ cm brown, no hydrophobic silt.
Hydrophobicity: in 4-cm thick light tan silt, not observed in
three nearby pits. Spotty hydrophobicity observed in base of rills.
Root mat condition: not observed
Distance from Boundary Peak trail head: 1250 m
Effect of June 26, 1996 storm: abundant rills average 20-cm
wide, 3-cm deep through pumice and ash layer.
Conclusions: Most gentle slopes with rilling yet observed. Hydrophobicity
allowed for formation of rills on gentle slopes?.
Site Number: 6
Fire Intensity: high (3-cm diameter limbs gone)
Slope: 38%
Rock Cover: pumice layer
Needle Cast: none
Ash depth, color, and moisture: 0-3 cm, black ash, charcoal,
and burned pumice, dry
Soil and Moisture: 3-11 cm light brown silt with pumice fragments,
dry; 11+ cm light tan silt with pumice fragments, dry
Hydrophobicity: upper light brown silt is strongly hydrophobic
Root Mat Condition: intact
Distance to Boundary Peak trail head: 1036 m
Effect of June 26, 1996 storm: some rills on slope, approx.
12-cm wide and 2-cm deep. No hydrophobicity at base of rills.
Site Number: 7
Fire Intensity: high
Slope: 53%
Rock Cover: 90% coverage with up to 25-cm diameter cobbles
Needle Cast: very sparse
Ash depth, color, and moisture: not observed
Soil and Moisture: not observed
Hydrophobicity: none
Root mat condition: not observed
Distance to Boundary Peak trail head: 945 m
Effect of June 26, 1996 storm: surface overland flow (sheetwash)
has removed all ash and charcoal fragments less than 1-cm diameter
Site Number: 8
Fire Intensity: low (needles and small branches remain on trees)
Slope: 44%
Rock Cover: 30% coverage, up to 20-cm diameters cobbles
Needle Cast: moderate
Ash depth, color, and moisture: 0-2 cm, dry
Soil and Moisture: +2 cm of silt with pumice fragments
Hydrophobicity: none
Root mat condition: not observed
Distance to Boundary Peak trail head: 884 m
Effect of June 26, 1996 storm: some sheetwash to move needles
slightly, but not sufficient to move large quantities of material.
Site Number: 9
Fire Intensity: high
Slope: 53%
Rock Cover: approx. 5% coverage with up to 20-cm diameter cobbles
Needle Cast: sparse
Ash depth, color, and moisture: 0-3 cm, black ash, charcoal
and burned pumice
Soil and Moisture: +3 cm silt with pumice fragments, damp
Hydrophobicity: none
Root mat condition: not observed
Distance to Boundary Peak trail head: 884 m
Effect of June 26, 1996 storm: approx. 80% of ash and pumice
layer removed by rilling and surface overland flow. Rills average 2-cm
deep.
Conclusions: Much more material removed from this site than
adjacent site 8. The differences being less surface coverage by cobbles
and more intense burn at this site.
Site Number: 10
Fire Intensity: moderate (needles and small branches removed)
Slope: 38%
Rock Cover:
Needle Cast: none
Ash depth, color, and moisture: 0-2 cm, ash, charcoal and burned
pumice
Soil and Moisture: 2+ cm light brown silt with pumice fragments,
moist
Hydrophobicity: none
Root mat condition: intact
Distance to Boundary Peak trail head: 945 m
Effect of June 26, 1996 storm: abundant rilling approx. 2-cm
deep. Approx 60% blackened pumice and 100% litter removed.
Site Number: 13
Fire Intensity: low (some needles left on trees)
Slope: 30%
Rock Cover: none
Needle Cast: moderate
Ash depth, color, and moisture: 0-2 cm ash and burned pumice,
dry
Soil and Moisture: 2-4 cm tan silt with pumice fragments, dry;
4+ cm light brown silt and pumice fragments, moist
Hydrophobicity: upper tan silt hydrophobic in places
Root mat condition: some intact
Distance to Boundary Peak trail head: 3048 m
Effect of June 26, 1996 storm: only sign of surface runoff is
one rill, 5-cm wide, and not hydrophobic at base
Site Number: 15
Fire Intensity: high
Slope: 42%
Rock Cover: none
Needle Cast: none
Ash depth, color, and moisture: 0-3 cm ash, charcoal, burned
pumice, dry
Soil and Moisture: 3-5 cm silt with pumice fragments, dry; 5+cm
silt with pumice fragments, dry
Hydrophobicity: spotty in upper silt layer
Root mat condition: some intact
Distance to Boundary Peak trail head: 1981 m
Effect of June 26, 1996 storm: abundant rills, 5-cm wide, not
hydrophobic in base
Site Number: 16
Fire Intensity: high
Slope: 44%
Rock Cover: approx. 80% coverage by up to 30-cm diameter cobbles
Needle Cast:
Ash depth, color, and moisture: 0-4 cm light brown silt with
few particles of charcoal on surface, dry
Soil and Moisture: 4+ brown silt, moist
Hydrophobicity: none
Root mat condition: intact, and controls depth of surface erosion
Distance to Boundary Peak trail head:1859 m
Effect of June 26, 1996 storm: Surface overland flow that flushed
ash and charcoal off slope, leaving only charcoal fragments greater than
2-cm
Site Number: 17
Fire Intensity: high
Slope: 55%
Rock Cover: approx. 80% coverage with up to 50-cm diameter cobbles
Needle Cast: none
Ash depth, color, and moisture: 0-1 cm, gray ash, dry
Soil and Moisture: 1+ cm brown silt, moist
Hydrophobicity: none
Root mat condition: intact
Distance to Boundary Peak trail head: 274 m
Effect of June 26, 1996 storm: abundant surface overland flow
has moved cobbles up to 50-cm diameter downslope
Site Number: 18
Fire Intensity: high
Slope: 34%
Rock Cover: approx. 90% coverage with up to 50-cm diameter cobbles
Needle Cast: not observed
Ash depth, color, and moisture: 0-1 cm, black ash and charcoal,
dry
Soil and Moisture: 1+ cm tan silt, dry
Hydrophobicity: none
Root mat condition: intact
Distance to Boundary Peak trailhead: 0 m
Effect of June 26, 1996 storm: ash and charcoal has been flushed
by surface overland flow. No rill or channel development. No movement of
rocks.
Site Number: 19
Fire Intensity: high
Slope: 27%
Rock Cover:
Needle Cast: none
Ash depth, color, and moisture: 0-2 cm black ash, charcoal,
and burned pumice, dry
Soil and Moisture: 2-6 cm tan silt with pumice fragments, dry;
6+ cm moist brown silt with pumice fragments, moist
Hydrophobicity: none
Root mat condition: intact
Distance to Boundary Peak trail head: 0 m
Effect of June 26, 1996 storm: some rills 20-cm wide and 3-cm
deep, no hydrophobicity in base. No clear levees on rills, formed by eroding
through layer of charcoal and ash.
Samples: BD-2 surface ash and pumice
BD-3 silt below ash, 0-3 cm, abundant root material
BD-4 silt from 3+ cm
Site Number: 20
Fire Intensity: moderate
Slope: 44%
Rock Cover:
Needle Cast: none
Ash depth, color, and moisture: 0-5 cm black ash, charcoal,
and partially burned needle fragments, dry
Soil and Moisture: 5+ cm brown silt, moist
Hydrophobicity: none
Root mat condition: not observed
Distance to Boundary Peak trail head: -274 m
Effect of June 26, 1996 storm: abundant rilling through thick
ash layer. Rills 5-cm wide and 4-cm deep. Levees line rills where slope
gentles. No hydrophobicity in base of rills.
