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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1968

Date

,5 /J1 tI ;)- SEDIMENT YIELD FACTOR RATING
SURF ACE GEOLOGY SOILS Cl.IMATE RUNOFF TOPOGRAPHY
(.) (b) (c) (d) (e)
(10) (10) (10) (10) (20)
.. Marine abales and re- .. Fine texturedj e.si- .. Storma of several .. Hleh poole nows per .. Steep upland slopes
l.led mudstone. .1Id 1, dispersed; ..Une- day.' dur.Uon with unit ... (in excess oC 3O'J.)
aU tato._ o1Icolln.; hich .hrink- .bort periods of in. b. LUle volume of flow b. Hllh reUef; little o.
swell characteristics tense rainfall per Wi area no floodplain devet..
tV b. SiDel. pain sUta and b. FreqUi&nt lntena. con.. opmeat
N flne aaDds vect.ive storms
CO c. Freezt--thaw occur-
....c.
(5) (5) (5) (5) (10)
.. Rocko of medium So Med.iulD textured soU .. Storm. of moderate .. Moderate pe.1e no... .. Moderate upland
hardness b. Occasional rbclr. fr.C" duration and Intensity per amt are. slopes (less than 20'7G)
b. Moderately weathered menta b. Inltequent convective b. Moderate volume of b. Moderate fan or flood.
c. Moderately fractured c. Calicbe layers storma now p.' unit .... plai.n development
(0) (0) (0) (0) (0)
a. Massive, bon! forma.. .. Hilb percentage of a. Humid climate with a. Low poole nows per a. GenUe upland slopes
Uonl rock frqment. rainfaU of low inten.. unit area (less than SGJ.)
b. Aggregated clays sity b. Low volume of runoff b. Extensi.ve alluvial
c. Hia:bin orcaNC matter b. Precipitation in. form per unit area plains
of snow c. Rare runoff events
c. Arid <:Umate, low in..
tensity storms
d. Arid climate; ....
convecUve storms
Factort I
value
GROUND COVER LAND USE UPLAND EROSION CHANNEL EROSION AND
SEDIMENT TRANSPORT
(0 (I> (b) (i)
(10) (10) (25) (25)
Ground cover does not ex. .. More than 50"!0 cultivated I. More tblD 50'!, of lb. .. Eroding bonlcl continu-
ceed 2()1)'. b. A1=ost all of area inttrln.. area characteri.%ed by rUl ously or at frequent in.
a. V flletation sparse; little aivel, Irazecl .nd IUlly o. londslid. tervals with latge depths
or no Uttet c. All of .... recenuy erosion and long now duration
b. No rock in surface soU b....ed b. Active headcuts and de-
gradation in tributary
channels
(0) (0) (10) (10)
Covet not exceedinC 40'1. .. Le.s than 25'1. cultivated L About 25.,. of the -. .. Moderate now depths.
.. N otiee able Uttet b. 50'1. o. Ie.. receatly characterized by rill and medium now duration
b. U trees pre'eIlt under. 10lKed Cully odand.lide erosion with occasionally eroding
_tory not well developed. c. Lea. than 50'1. inten.i..... b. Wind erosion with depo. banks or bed
ly vued sition in stream channel_
d. Ordinary toad and other
ccmatruction
(-10) (-10) (0) (0)
.. Area completely, protect.. .. No cultivation .. No appareat .icDO of .. Wide shallow channels
ed by veptation.. rock b. No recent loccinc erosion with nat gradients and
fracments, littet c. Low intensity it8ZinC short now duration
b. LitUe opport\Ul1ty for b. Channels in massive
raWall to reach erodible rock, large boulders, or
material well vegetated
c. Artificially controlled
channels
F.ctor~ I
value
I Subtotol (.) - (I) Subtotal (h) - (i) I :~~~N~G - -- = --. ac.ft./sq. mL/yr.

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