| Reach:
Left Fork Trailhead
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Stream:
Left Fork North Creek
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Watershed:
Virgin
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State: UT
Survey Date:
Fri, 05/21/2010 - 11:00am
Background information available.
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| Observers:
Dave Thoma (and RSRA trainees)
E-mail: Dave_Thoma@nps.gov
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Address: NPS-Northern Colorado Plateau Network State Route 9 Zion National Park Springdale, UT 84767
Phone: 435-772-0141
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| (UTM) Zone: 12
Upstream (UTM): 0315138E
Upstream (UTM): 4128933N
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| NAD: 83
Downstream (UTM): 0314874E
Downstream (UTM): 4128778N
Elevation: 1426 meters
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(UTM) Start: 0314874E
(UTM) Start: 4128778N
Upstream or down? Upstream
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Scores:
WQ 3
HG 3.6
F/AH 3.3
RV 4.4
TWH 2
Overall 3.3
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| Water Quality |
|
4 |
1 |
Algal Growth |
%=6 |
| 2 |
2 |
Channel Shading |
%=3 |
|
| 3 |
|
Mean Score |
| Notes: |
|
|
| Hydrogeomorphology |
| 2 |
3 |
Floodplain Connection |
| 5 |
4 |
Vertical Bank Stability |
%=99 |
| 5 |
5 |
Hydraulic Habitat Diversity |
| 5 |
6 |
Riparian Area Soil Integrity |
| 1 |
7 |
Beaver Activity |
|
| 3.6 |
|
Mean Score |
|
Notes: For indicator 3, we would probably expect some degree of entrenchment normally, b/c the stream is on bedrock, it is a steep, narrow walled canyon (and plus, degraded from 2009 flood)
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| Fish/Aquatic Habitat |
| 4 |
8 |
Riffle-Pool Distribution |
| 2 |
9 |
Underbank Cover |
%=1 |
| 3 |
10 |
Cobble Embeddedness |
%=25 |
| 5 |
11 |
Aquatic Macroinvertebrate Diversity |
| 3 |
12 |
Large Woody Debris |
| 3 |
13 |
Overbank Cover |
|
| 3.3 |
|
Mean Score |
|
Notes: We considered "geomorphically scaling" the Indicator 9 score up to a higher score b/c not sure if undercut banks are possible, but then decided they're building back up after recovery from fire and flood (HUGE fire in 06 followed by HUGE HUGE flood in 2007)
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| Riparian Vegetation |
| 3 |
14 |
Riparian Zone Plant Community Structure |
|
G=66%
S=21%
MC=33%
UC=0%
avg=30%
|
| 4 |
15 |
Shrub Demography and Recruitment |
| 5 |
16 |
Tree Demography and Recruitment |
| 4 |
17 |
Non-native Herbaceous Plant Species |
| 5 |
18 |
Non-native Woody Plant Species |
| 5 |
19 |
Grazing Impacts on Ground Cover |
| 5 |
20 |
Browsing Impacts on Shrubs and Small Trees |
|
| 4.4 |
|
Mean Score |
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Notes: Native dominant shrub = coyote willow, native tree = Fremont's cottonwood
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| Terrestrial Wildlife Habitat |
| 2 |
21 |
Shrub Patch Density |
| 2 |
22 |
Mid-canopy Patch Density |
| 2 |
23 |
Upper Canopy Patch Density |
| 2 |
24 |
Fluvial Habitat Density |
|
| 2 |
|
Mean Score |
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Notes: There was a fair amount of slick rock where things cannot grow. Also, only individual canopy trees, not "patches"
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| Scores |
| WQ |
HG |
F/AH |
RV |
TWH |
OVERALL |
| 3 |
3.6 |
3.3 |
4.4 |
2 |
3.3 |
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