WSP04023

• File Number: 8272.600.60
• Description: Colorado River Basin Salinity Control Program - Basin Member State Info - Utah
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 7/1/1990
• Title: Upper Colorado River Basin Rangeland Salinity Control Project
• Water Supply Pro - Doc Type: Report/Study

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Watershed c..I'/ State

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Condit:ion

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Date .!.r-- 7- 7' cJ

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Acres

PSIAC - 1968

M r4 f) LAI}/f) . SEDIMENT YIELD FACTOR RATING
SURF ACE GEOLOGY SOILS CLIMATE RUNOFF TOPOGRAPHY
(.) (b) (e) (d) (e)
(10) (10) (10) (10) (20)
:~ Marine sbales and re. ~ Fine textured; easi.. .. Storms of several !3 HiCh peak nows per ~iteep upland slopes
- i.ted mud.tonn and ly dispersed; .aUne- day.' duration with 19 rail atea (in exeess of 3~.)
sUtatonea oIkollile: h1cb shrink- short periods of in.. . Larce volume of flow ~ High relief; little or
><':If (.'~ .WiIreJiaracterisUcs tense raint all pet unit area no floodplain devel..
" b. Slnc1e grain silts and b. Frequent intense con opment
;/ :r, fine sands veetive storms
"",: ;. .~,K~ 9- Freeze-thaw oceu...
-' "
rence
(5) (S) (5) (5) (10)
.. Rocks of mediulII .. Medium. textured soil .. Storms of moderate o. Moderate peak no_ .. Moderate upland
bardnesa b. Occ..ional rbck frag:'" :9 ruratiOn and intensity per unit area slopes (less than 20%)
b. Moderately weathered menta . Infrequent convective b. Moderate volume of b. Moderate fan or flood-
c. Moderately fractured c. Caliche layers storms now per unit area plain development
(0) (0) (0) (0) (0)
s. Massive, hard form... .. Hiih percentage of a. Humid cUm ate with .. Low peak nows pe. a. GenUe uplan.d slopes
tiona rock fragments raintall of low inten... unit area (less than 5'1.)
b. Aggregated clays sity b. Low volume of runoff b. Extensive alluvial
e. Hlghin or&anic matter b. Precipitation in form per unit area plains
of sno", c. Rare runoff events
1': M/(AI-UJ.. e. Arid Climate, low in-
tensity storms
d. Arid climate; rore ,
conved.ive storms
Factor I Ie) /IJ J /() coZ /)
value ....-
GROUND COVER LAND USE UPLAND EROSION CHANNEL EROSION AND
SEDIMENT TRANSPORT
(f) (g) (h) (i)
(10) (10) (25) (2S)
Ground cover does oot u- .. More than 50'l. cultivatred a. More th"" 50'!. 01 the a. Eroding banks continu-
eaad 20'l. b. Almost all of area inten- area characterized by rill ously or at frequent ;,,-
.. Vegetation sperse; little sively grazed snd gully or landslide tervals with large depths
or no litter e. All 01 are. recently erosion and long flow duration
b. No rock in surface soil burned b. Active beadcuts am de-
gradation ;" tributary
channe Is
(0) (0) (10) (10)
Cover not exceedinc 4()If. .. Less tban 25,.. cultivated o. About 25.,. of the are. .. Moderate now depths,
.. Noticeable litter b. 50'!, or less recently characterized by rill and medium now duration
b. U trees present uncIer- 1000i"d &u1ly or I andslide erosion withoccasionaUy eroding
story not well developed e. Less than 50'!0 intensive- b. Wind erosion with depo- banks or bed
ly grazed sition ill stream channels
IA <f! ;2jO! L T d. Ordinary road and other
0 construction
v (-10) (-10) (0) (0)
.. Area completely protect. .. No cultivation o. No appuent signs of .. Wide shallow channels
ed by vel1etaUon, rock b. No recent logging erosion with nat gradients and
fragments. litter e. Low intensity grazing short now duration
b. Little opportunity for b. Channels ;" massive
raWall to reach erodible rock, large boulders, or
material .;~>!.:/;U) well vegetated
c. Artificially controlled
channels
Factorrl If) If) ..~_. - /.
.2 -. ~ ../
value J
TSUbtolol (.) - (i) n 7 Subtotal (h) - (i) 50 I TOTAL iJ7- !;()
/ RATING - - - - ~ -, - ac.ft.!sq. mi.!yr.

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