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<br />4
<br />
<br />5
<br />
<br />Flood plain strip maps are a'lailabl~ for studies. Flood plal~ boundarle~
<br />were obtained irom aerial photographs of the area. Figures 3$, 36 and 37
<br />show a plan of the watershed floodplain ~~d the lor.gltudinal profile of the
<br />channel.
<br />
<br />(1) Reduction in floodwater and sed~e~t damages.
<br />(2) Kore intensive land use on flood plains.
<br />(3) Conservatlo~ benefits from the installed progra~.
<br />
<br />Area 1n'~datlor. curves for the cha.~el ~aches of Kiowa Creek are shown in
<br />F1gure~ 35 thro'-'g:' 1.:0.
<br />
<br />IX. H~'drolo~lc Soil r,ro'J"Os and :'aoo Use Data
<br />Seils above the special at~dy ~rea were identified by 5011 Conservation
<br />perso:'\nel. T,,,, Grea~ Pla1n~ Soil Co:,relator, Soil Conser'tatl<.rl Service.
<br />has correlated "~e soils .~th the Service's ,ta,-dard t~~ro1~~ic soil
<br />groupings.
<br />
<br />'lII. Reservoir Basin and Channel Stability Ra.'ll'(es
<br />
<br />The Soil Conservation SerVice has installed reservoir basin transverse
<br />ranges above Floodwater Retarding St~~c~~~~ E-?, J-)3, ~-79, Q-~:, ~d
<br />R-3. Their p~ose is to permit neasurement of sed1me~t depo~its within
<br />the reservoirs. The dates of the original surveys were as follows' B-9
<br />in August 1956, J-)) in August 1956, K-79 in August 1956, Q-51 in June
<br />1957, and R-3 in July 1956. See Figures 41 through 49 for the original
<br />survey data.
<br />
<br />Tne soils fall into hydrolo~~c soil grou~~ ~, ~, and D as defined in the
<br />~'atior.._: <::.~s Er.gineerir.g :~andbo"::"'. Sectio:l 4. Table 7 shows a list
<br />o~ soils in the n~:!~re:lt hvdrologi~al soi: groups used in this report.
<br />The soils :isted as tentative (lent.) in Table 7 are not listed in the
<br />j;~+,ionlll F'''~1..jeering Handoook, ~ec~10n 4, edition prior to 1962 reVisior..
<br />
<br />In August 1957 a resurvey of K-79 reservoir was made following :,11e storm of
<br />July 30, 1957. It 'Was made on every l'ourth range within the rMervol:r
<br />basin. Five soil samples ware taken to determine the grain size distribu-
<br />tion of the sediment retained within the reservoir. The location of the
<br />sample a.rea~ is sho'.m on the resurvey range grid in :'igures $0 and 5'1.
<br />Table 6 lists the grain size distribution of the samples.
<br />A detailed sedimentat.ion survey was made in October 1961 by Agrioultural
<br />Researct Service. At that time 5 additional basi.~ rar.ges a.~d 14 ch~~el
<br />s~ability rar.ges, both above and below K-79, ~ere established and monu-
<br />mented.
<br />
<br />'l'he 195'4 la.~d use map ia:' the special S",l1~? ~,:,",a~ is included as an
<br />exwnple of land "ISe distribution acceding ;,0 tte hydrologic so11 group-
<br />ir..:8. (See FigureB 5~ through 5'6). SF" Iable 2 :or the weighted so11
<br />cover complex number5 for the ~~eci~ study area.
<br />
<br />Figure 57 u:.~'.'s the 1954 ...'ll'ual land use inventory of the Kio'~.. c-...eek
<br />~ater8hed flcod plain. The cha.~~el flood plain on the East Fork a~c ~he
<br />main s, = of ::io',,-a Creek ,....,,,: "rmua::. la.~d use i~'iento:-ies frcm 19,4 to
<br />present.
<br />
<br />Annual land U"B inv"ntories were prepared fo~ tt_e enti:-e '"atersr.ed in
<br />195'4 and 1960.
<br />
<br />VIII. Special Study Area
<br />
<br />X. Hydrologic Flood routing~
<br />
<br />The drainage are~s abov", Floodwater Retarding StructureB 8-9, J-33, K-79,
<br />Q-51, a.~ R-3 were designated for ~pecial ~tudies. These five areas were
<br />selected because of their representativeness o~ 50ils, land use, and orop
<br />distribution over t.he uplands. Water ~tage recorders and re~ervoir ba~in
<br />transverse ra.'!ges are establiShed .~thin the reservoir~. Range study plots
<br />are e~tablishcd for the area above resarvoirG. A network of precipitatton
<br />gages is located around the area.
<br />
<br />A stonn of six hours duratio:! resulting in uniform runoff of one i,.ch
<br />waS uued in the flood routing of Kiowa Creek Watershed. Cnit hydrograp~s
<br />.....ere developed fer all subarea.~ a.'1d routed thrO\lgh the rese:-voir ar.c
<br />reach system using a st~rage method of routing. Table 8 summarizes the
<br />results of the ro~ti~~ "~th and .~t~out the floodwater retarding structu:-es.
<br />
<br />n.
<br />
<br />Range
<br />
<br />Studv Plots
<br />.
<br />
<br />A special study is being made on
<br />"'1d partich she distribution.
<br />U. S. Geological Survey.
<br />
<br />K-79
<br />This
<br />
<br />reservoir of sediment trap efficienoy
<br />is being done in cooperation with the
<br />
<br />Range condition stl,;.dies are bcil'.g made a5 pa.~t of t~e eval'~o.tio:l st'.ldies
<br />O:'ltheKiowaCresk..'atsrsted. There is one range plot locatec. above each
<br />of the five floc~wstpr r~tarding :-e~ervoir" (B-9, J-33, K-79, Q~,l and
<br />R-3). :'hese plotu were installed to malte compari~on of t~c prese"t pl:J.r.~
<br />cover with ,~getatic~ that a site can produce ir. t~e highest state of
<br />developm~nt. Sampl~s ar~ taken anr.ually for thl" stud.v.
<br />
<br />Annual land use in',er:.tories are prepared for the areas abov.. floodwater
<br />retarding structures No. 8-9, J-33, Q-51~ R-3, I-....-20, 2-B-10, )-B-40,
<br />IInd l-X-IO (not built) for th~ years 19$4 to present.
<br />
<br />The objectives of the sp~cial study are to evaluate the effects of the
<br />watersh~d program in both physical a:ld ecor-ornical te=s. Benefits that
<br />will be stUdied are as follows:
<br />
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