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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<jA&EI?S tJtf51f
rtMrt/C05 ffi>I/J16.A/T
51!;.) [0G- C( r.")./S I(.;L/E..
Acres

C 5 tJ'7t.I.2.

SURF ACE GEOLOOY
(e)

(10)
.0 Marille shales and re- ..
lated mudetoD" and
sil tatODe.

IV-14

Watershed // T State

SiJbwatershed l?iZ ;/AJI-T/, T6
~/11> h4V P

FIJI

I/AI./ (. ;;;;
Condition

Nallle H4If#1 - ,1!J./.,#J

Date ~'dl- 10

PSIAC - 1968

SEDIMENT YIELD FACTOR RATING

SOILS
(b)

CLIMATE
(c)

RUNOFF
(d)

TOPOORAPHY
(e)

(10)

HiCh peak nows per ..
unit area
Lars. volume of flow b.
per unit area

(20)

Steep upland slopes
(in excess of 30"7.)
Rich relie!; little or
no floodplain devel-
opment

(10)

Fine textured; ...i- .0 Storms of several e.
ly diaperaed; ..line- day.' duraUoa. with
atka11ae; bicb shrink. sbort periods of ill. b.
awell characteristics teue raiAfa11
b. Sial!. If.in sUts anc:l[b. Frequent intense COD
fine sanda . veet1ve storms
c. Freez..thaw oceur-
reDce

N
N
00
r..

(10)

(S) (5) (5) (5) (10)
e. Rocka of medium. .0 Medium textured soU .. Storms of moderate 0. Moderate peek nows a. Mo<1erate upland
hartin.sa b. Occaaiona1 !'bet frac- duratioo. and intensity per umt area Slopes (less than 20~0)
b. Moderately weathered ments b. Infrequent convective b. Moderate volume of b. Moderate fan or flood.
c. Moderately fractured c. Calicbe layers storm. now per unit area plaia. development

(0)

Low peak floWS per a.
umtarea
Low volume of runoff b.
per unit area
Rare runoff events

(0)
Gentle upland slopes
(less tban 5,"0)
Extensive alluvial
plains

(0) (0) (0)
.. Massive, hard forma- a. Hllh percentage of a. Humi4 cUmate with a.
tions rock fraementa rainfaU of low inten-
b. Accregated <:lays sity b.
c. Hit;hin ol'lanlc matter b. Pre~itation in form
of snow c.
c. Arid climate, low in-
tensity storms
d. Arid cUmate; rare
convective storms

F-.ctor
value

()

GROUND COVER

(0

Ground cover does not
ceed 2()l'!0
.. Vegetation sparse; little
or no Utter
b. No rock in surface soU
(\ C t;
t':' :J 1(.' :(':'(l

Cover Dot exceedi.nc 40'1.
s. Noticeable Utter
b. If trees present under-
story not well developed

1(#.:.. All'd4'1fP

:!J', I... DuLL. .
c --, (-10)
a. Area completely protect-
ed by vecetatioD., rock
fra~ents. litter
b. Little opportunity for
rainfall to reach erocUble
material
1(, '!/;~~tUi'" 5it '('5
;"/;0;/ ,-~'. ,..t. t' 1 t ,(i5

Factor , ,'/
value 0

I Subtotal (a) - (0)
(lrlst~C~IO"$ on '~tle'se)

r:
v

,r

LAND USE

(0)

(10) I
ex- a.
b.

(10)

More tban 50% cultivlted
Almost a.11 of area inten-
sively grazed
c. All of area recently
bwned

(0)

(0)

.. Less than 25,. cultivated
b. 50'1. or less recently
1...eeI
c. Less than 50'!. WeAsiva-
I,. iP'szed
d. OIdinary rold and other
consuuct!on

(-10)

.. No cultivation
b. No recent log&inl
c. Low intensity crazinc

/!' t.{"1.A

o
..21

);. ;-)';- 00

r"l
c.<

UPLAND EROSION

(b)

(25)

.. More than SO'T. of the
area characterized by rill
aDd gully or landslide
erosion

r ,? f.'"
C'. d!,. ;'f..,c 'j,,-

(10)

L About 2S-ro of tbe area
characterized by rill and.
Cully or landslide erosion
b. Wind erosion with depo-
sition in stream. channels

(0)
.. No apparent: sips of
erosion

9'
"

'/

CHANNEL EROSION AND
SEDIMENT TRANSPORT
(i)

(25)

a. Eroding banks continu.
ously or at frequent in.
terv Rls witb large depths
and long Clow duration
b. Active he adcuts and de-
gradation in tributary
channels

(10)

a. Moderate now depth$.
medium now duration
withocc:asionally eroding
banks or bed.

f~jI~ ,;. !'r~/~'

(0)

.. Wide shaUow channels
with nat gradients and
short: now duration
b. Chaone Is in mas sive
rock. large boulders, or
well vegetated
c. Artificially controlled
channels

1-./

I TOTAL ':{O = ,31-j
RAT1N~/- - - -. - ac.ft.!sq. mL/yr.

Subtotal (h) - (i) ) ).

,j ~ 5'....Y NJ J/w
SHEET l.!:i- OF R