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<br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />~ACCR:; (,/,4fl-l" <br />g{)');< CA/FF5 #: II <br />'b.AD ";'/.iN/:) G~MC!t<I'If. <br /> <br /> <br />Acres <br /> <br />SURF ACE GEOLOGY <br />(e) <br /> <br />(10) <br />.0 Marine ahales and N<- <br />I.ted. mudstones aDd. <br />aU tatones <br /> <br />/-:JH'~A/r <br />Name R,.t:...U-4 <br />Date ,S'- 'l-/(J <br /> <br />IV-9 <br />Watershed Ur State <br /> <br />SiJbwatersbed <br /> <br />PSIAC - 1968 <br /> <br />SEDIMENT YIELD FACTOR RATING <br /> <br />SOILS <br />(b) <br /> <br />CLIMATE <br />(e) <br /> <br />RUNOFF <br />(d) <br /> <br />/jJlJ.tTt{ <br />Condition <br /> <br />TOPOGRAPHY <br />(e) <br /> <br />Fine textured; e..i.. a. <br />ly dispened.; s.Un&- <br />alkaline; bltIh shrink. <br />.""'11 cbara<:tertstIcs <br />b. St.acle arain silts and b. <br />fin. sanda <br /> <br />(10) <br /> <br />Hillh peak: flows per a. <br />uDit area <br />L8J'&e volume of flow <br />per unit area <br /> <br />(20) <br /> <br />Steep upland slopes <br />(in excess of 3(>>',) <br />High relief; little or <br />no floodplain deveI" <br />openeat <br /> <br />N <br />f\..') <br />-J <br /> <br />1r7~/,,;::O~ <br />-;,t '1 ~ >,(..,,~ <br />C/.(fr-~ -rw;TV <br />(5) <br /> <br />(10) <br /> <br />(10) <br /> <br />Storms of several a. <br />day.' duration with <br />short periods of in.. b <br />tense rainfall <br />Frequent ,intenae con <br />vective storms <br />c. Freez..tha. OCCUf'o <br />reiice <br /> <br />(10) <br /> <br />(S) <br /> <br />(5) <br /> <br />So Stonns of moderate .. <br />duration and intensity <br />b Infrequent convective b. <br />storms <br /> <br />(5) <br />Moderate peak nows <br />per unit area <br />Moderate volume of b. <br />flow per unit area <br /> <br />a. Moderate upland <br />slopes (less than 20~o) <br />Moderate fan or flood- <br />plai.n development <br /> <br />a. Rocks of <br />herdne.. <br />b. Moderately <br />c. Moderately <br /> <br />medium. .. <br />b. <br /> <br />Medium textured soU <br />Occasional rock frag- <br />ments <br />c. Caliche layers <br /> <br />weathered <br />fractured <br /> <br />(0) <br />a. Massive, hard forma" <br />tions <br /> <br />(0) <br /> <br />(0) <br /> <br />(0) <br /> <br />(0) <br />Gentle upland slopes <br />(less than SOJ'o) <br />Extensive alluvi.al <br />plains <br /> <br />a. HiSh percentage of a. <br />rock fraements <br />b. Aggregated clays <br />c. High in orglll1ic matter b. <br /> <br />Low peak flows per a. <br />unit area <br />b. Low volume of runoff b. <br />per unit area <br />c. Rate runoff events <br /> <br />fl.. (JI/{AI,,/' <br /> <br />Factor <br />value <br /> <br />/iJ <br /> <br />GROUND COVER <br /> <br />(f) <br /> <br />Ground cover does not e'l:- <br />ceed 20010 <br />.. Vesetation sparse; tittle <br />or no litter <br />b. No rock in surface soil <br /> <br />Coyer not exceediDc 40'1. <br />.. Notice able litter <br />b. It trees present under- <br />story not well developed <br /> <br />if N! /.f/p /cfL r D <br />(-10) <br /> <br />.. Area completely protect- <br />ed by vegetation, rock <br />fragments, litter <br />b. Little opportunity for <br />rainfaU to reach erodible <br />Inaterial <br /> <br />Factor <br />value <br /> <br /> <br />Subtotal (e) - (K) <br /> <br />(Instructions on r~tJ.rs.) <br /> <br />'0 <br /> <br />d,..:7 <br />:~~~~G!-i Z = ~Q ec.lt.!... mi./y,. <br />,J.~ TIc::. <br />SHEET L OF -1..2... <br /> <br />Humid climate witb a. <br />rainfaU of low inten- <br />sity <br />Precipitation in form <br />of snow <br />c. Arid climate, low in- <br />tensity storms <br />d. Arid climate; rare <br />convective storms <br /> <br />/() <br /> <br />? <br /> <br />/0 <br /> <br />LAND USE <br /> <br />UPLAND EROSION <br /> <br />(g) <br /> <br />(h) <br />(25) <br />;{ --Vote than SOOJ'. of the <br />C/area characterized by rill <br />and aullY or la.Qd'i11<li" <br />erosion <br /> <br />(10) <br /> <br />(10) <br /> <br />.. More tban SO"J. cultivated <br />b. Almost all of area il'lten- <br />sively grazed <br />c. All of area recently <br />burned <br /> <br />(0) <br /> <br />(0) <br /> <br />a. Less than 250}'0 cultivated <br />b. SO'fo or less recently <br />IOiaed <br />c. Less than 50010 intensive- <br />ly grazed <br />d. Ordinary road and other <br />construction <br /> <br />(10) <br /> <br />.. About 25;0 of the area <br />cbaracterized by rill and <br />gully orlandslide erosion <br />b. Wind erosion with depo- <br />sition in stream channels <br /> <br />(-10) <br /> <br />(0) <br />a. No apparent signs of <br />erosion <br /> <br />.. No cultivation <br />b. No recent logging <br />c. Low intensity grazing <br /> <br />l;. .;i.///Jr/2> <br /> <br />/D <br />/ <br /> <br />/ 1--- <br />~.'-" <br /> <br /> <br />Subtotal (h) - (i) 0-0 <br /> <br />:lj <br /> <br />CHANNEL EROSION AND <br />SEDIMENT TRANSPORT <br />(i) <br /> <br />(25) <br /> <br />a. Eroding banks continu- <br />ously or at frequent in- <br />tervals with large depths <br />and loni flow duration <br />b. Active headcuts and de- <br />gradation in tributary <br />channels <br /> <br />(10) <br /> <br />a. Moderate flow depths, <br />medium now duration <br />withoccasionaUy eroding <br />banks or bed <br /> <br />(0) <br /> <br />a. Wide shallow channels <br />with flat gradients and <br />short now duration <br />b. Channels ill massive <br />rock, large boulders, or <br />well vegetated <br />c. Artificially controlled <br />channels <br /> <br />" <br />