CORRESPONDENCE RE STUDY OF RUNOFF CHARACTERISTICS OF URBAN AREAS
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Unl.tcd Sta:tcs Departmcnt o~the Interior
GEOLOGICAL SURVEY
Water Resources Division
500 lock Sb~cet
Tampa, Fl~i~d~J3602
.' ';'1ay'i2,1974
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Mr. Max G. Cattle
Director of Publ ic \:Jrks
City of Clc:;n/ater
P. O. Box 4748
CleanJater, Florida 33518
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Dear ~:r. Cattle:
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The United States Geological Survey has initi~ted a study of the runoff
characteristics of urban areas in t~e Tampa Bay Re0icn. This study was
descri bed in a 1 etter addressed to you on December 18, 1973 from
nr. J. F. Turner and in a subseq.ucnt r:le::~ing held in your office on
January 15,1~:7r:,. The purpose of this letter is to sur::ii:arize the
,proposed coop2,aticn aGd funding for this study beginning on
July 1, 1974..
The proj ect \'1. s begun in
part of fisca~ year 1974
. Florida }:ater r:ullil'JE::-'Si1t
~D.s. Geolcgic~l Su~vey.
net\:ol'l~ and t! e pu~'chase
t.pril. Initial funding for the remaining
\':as provided coop~'r'ative1y b,;: SO!.ltfr,'.'est
District, Hillsborcugh County and the
Th8se funds prov'idcd for p1anni.ng a data
of ec;uip:::ent.
Proposed coop(:rutive financing for fiscal ye0.r 1975 is as follows;
Sl-!n::m
Hi1lsborou~h Countv
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Pinel1as County
Clearv/ater
St. Peter~burg
'C;.c"$40 ,000 Tota 1
1C.~20,OOO, Total
, 20,000 Tota 1
brc;6D ~eO/3,aoTota 1
n. ~N 26,000 Total
Total
$122,000
Annual fundins in 1ikec.iT.Dunts is planned for fiscal years 1976-79
with a re~uction in l~CJ fiscal year to $22,000 total to complete
reports (lnd sl1i~:-ari ze resu1 ts.
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I hope this information is'he1pfu1 in galnlng appro~a1 for this
study. If you req~1irc addHiontl1 infon:'!ation, please do not hesitJte
to contact we at 228-2124.
FOR THE SUBDISTRICT CHIEF
~~ekC E: S~J--
.G. E. Seaburn
~ydro1ogist
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\later Resources Divioion
500 Zack Street
Tampa, Florida 33602
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December 18, 1973
Hr. ~'!!lX G. [Iattlc
City Hano~~cr
City of Cleanl.:1ter
Clearvatcr,Florida
Deer Hr. Dattle:
Thill lettcl:' io in regard to recunt discuzsiocn with Hr. Cecil n~ndcrson
concerning a proposed cooperative progr.:m bctl1cen the City of Clc:1n:atcr
and th~ u. s. Gcolo~icalSurvey to ~tudy urban rmloffcllarncteristies
of \Taterr;hcds in the Cleal\!at~r area. l.s he discussed, the propon~d
study llould be ao i..'1tc::;rul p~rt of e large oealo runoff otuc1y of lvoter-
sheds io urbcul and =~tropolit.:111 al:'C<19 in the P1uellas-II111sborollgh County
aren.
Aa you ore ~lCret a paucity of urlMn runoff data UO':I exist for tIle
t::etrorolitnn ~r(;u.J of ~:cot central 171ori.de. Data beiu3 currently
collectcJ by vorlous a~cllcies ore inridc~uat~ llith respect to ~rca covered
end types of iIlfor.::.:lcioll being obtained to detercinc character:f,5t:!.co of
runoff fron urban are;].;') under varyicl; degrees of developr.xmt. A
cOL,prchcnsi'.'c dntn-:'.:lne tor tllc St. retcr~but'g-Clearunter-:nr,?a nrea
is ncccDsnry to Gu;;port current ~n...iror'J:Qntal nnd acolo0icel studies, ilS
well as cvaluation of th~ effects of existing end propo3cd future
devclop!:1c:lts u'it~lin tbe Bttu:y orca.
Because of the ~:!.rkcd data ne~d;J. aclJitiouul federal cooperntivc
matchinG [~,Js nay b~ availnblc for i~le~cntin~ a ri~l progran in ~cst
central FloriC:o, includinG the Tnr::pn.-St. Pet~r.cburg arca. In onl~r to
~ct the incren~lin~ d.:ltn llCCtlO of local St;\tc and Padernl govcrIJr.1cntn.l
.8t,encieG invoh'~d \lith enYirol:~~cntal <lnG ecolOGical pro;,l"n.o:l, the 0. S.
Gcolot;ical ~urvcy 113 propc::;iIl~ toir:?lcL:~nt a l.:lrr;c-~cnle data col1c;ctio!1 _
end avalu.1tio:1 pro;:;ra:J. t!l.:lt \:ould pro'.~lJc ,nIl ncequatc doto-base for de'J'C1op-
ed areas o[ Piu~l1a!: Dud liillz~orol:(7Jl CCHmticD. 1'1110 proposel} Gtuc!y \1O'.lld
be joi:ltly fin:,:lccd by the City of St. PctcrlJbur!~. Pincll:lD County,
Florida iJcpartr.:cnt of 'l'r<1:~arortatic:1t City of Clca~T;lter alld lIillGborough
County in cocpcratioo \.lith the U. S. Gcolocic~l Survey.
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Tho proponed rcr.ion:l1 otudy hns threo prlncipnl objectivea. Tho firot
10 to eotublicn 11 Jata net\1ori. throu!;hout tho otuc1y area to collect
strollr.1flOt.f. c11t.1.1.t1c, ehcr..1cnl quality of \.1tltcr onr. 6edir.cnt ililta to
charnctcri7.e urLan runoff. TIle netuorlt ~ill provide current runoff
1uforT.lation includinr, CJunllty of otrcnuflOY frofn waterohedg under n
wide range of clcv~lopl~ant, and clntn that c:m Le uoed for input. calibrn-
tion, lUld verificution of 11 yntcrohcd Gh!Ulrttion r.:odel. Thio nett10rk \li1l
Dupplewcnt related data collection nct1v1tico currently operated in
cooperat1on \lith other af;enc1ea.
nlO second objective 10 to cnlibr~te, verify, ~d uoa a vntcr.ohod
moua1 in ucrivinr, plallninr, and t:UU1age:cnt 'infornation, inc1udinr,:
"(1) 3trcanflou at un~arcd oite3 for current emd future Gtareo of ~.:atcr6hed
dovc1op~cnt; (2) Pl'cdiction of flood frequcncy 09 a function of druinnso
area, degree of ch:mnelizati(.'n, :mcl atom scuer deve1opt'lCIlt; (J) oynthcoio
of 10u flo\l conditiouo uncler various otnf:co of uevelopi::!ent. This informa-
tion will be ulJefu1 in providinr, project cooperators uith 1nfornation
on (1) flooel hazuru!l arena; (2) on dccdr,n of brids~ site opcninr.; and
(3) anVir01lJ.~l1tnl it:1.pact of ch<lIl~cO in land uso.
'I1le third objective in to evalulltc cher..:lcal qUOllity charncterir:tics of
urban ru.'loff ~ldcr e::1:otinr: conditions in th~ study area nnd to project
cheDicn1 quality char~ctorintico, in ~ ~encr~l vay, for urbnnrunoff for
pOS3ible future dev~~lo;)J.lCnt. In addition, these dnta interpretations
com1.>ined yith the flolT characteristico cen be used by us in oodelo
to ~~O predictionn of effects of urbenizution on the hydrologic en-
v1ron~nt as the ncou aricco.
'I11C first ph~c of tho prOhrn!:'l uill involve the cstnbliohtilCnt of a dnta
netuork in. nbou~. 15 urbani::cd lUltcrohcdo' in the study area (5 ara
plunned for U:Ul r.borough COU.-lty uno 10 for the Pillellns County area).
'1:110 uatorchcdn ~; ill runf:e :in Giza frot] Mout 3 up to 10 sq f.liles,
coverin~ a wide r~nGe and dp.r,rcc of ccvclopcent. A Btreanfl~ ~ar,ing atation
will he ins tulle tl at the cutlet of cach llcterzhec1 and hif,h clenoity
precipitation nc t:\:ork cOt."?o~cd of nbout 3 r~cording rainp'af,~8 uill ba
installed in each uatcrt:hen. ~ainfall nr.d ot:rcLL.,flml will be recorded at
ti~~ :t:n~c:.-'!~1.!J pc::ll::;::: an 0=:ul1 ao 5 oinuteD, depending on individual
~atcr(lhcd ch.::tractcristic!J. 1!ctcorological d~ta will be collected at
about 2 siteD in the Gtudy area (air tc~r-crat\tre; Class-A pan avaporction;
rolative llUuid1::y; ,dnd speed; Golar rndi~tion. lone anu short \lave; and
barometric pre~9ure.
Untar quality data \,111 be co1lecteclat euch otrcllm [;a~1ng oito and
oavernl other related Giteo in the upper l:ate.rr:hedn. Sar.:pling lIil1 be
conduct.ed to uctenrl.lle the variation of ~:ater qunlity uithin otOt'Ll evauto
aD ...roll M anonf: atornn unu n~.ong Deuuonn. 7110 cffcct of antecedent
rainfall condition:J n:J lIcll ao the effect of land ueo "ill uo ntullied
ntlonr. the oeluctcd urban uatcrnherlo. ' l:ninfclil sonple3 \.-111 lllDO be
collected at about 10 Lc)~ rainfall recorc!in~ otationo to otudy tho qunntity
of chci:ucal load contributed froQ tho rainfall llnd the ntt....oDphorc dur.in?,
dry \;penther periodo.,
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'typos of c1lcl,ucnl quality analyuco that ore to ba obtained 11\ c<1ch
vnterr;ha<1 oru llGt~d in tho follo~inr. tnble. 'tho C:Cl'Ict onf:'Plin~
uchcl\ulo for cach annlY~JCD has not 09 yet Lccn octcrl:11ncd; ha::cvcr.
for the ffrot year. 0 co:~prchcnn1vu canpling schedule \1111 be t1aintaincd
\11th rCGpcct to ctorn and Gca!Jonal variationc in cotnbliGh1n~ ouit.wlc
t1onitorln~ oclwduleG. '
rnorosr:D Cii12rICAL-QUALITI IJlALYSr:S - rIllliLl.AS-IlILLSTIO:tOUGlI coum,"Y urUlA!T
1llJliOIT S'roDY
Inorr;:tn1co
Uutricnts
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. ~td COL:;>leto (for principal
:inOrf;onic and Vhyoical
pa.rll~ntern)
Trnce !,~~t.:l.lo
uut principo1.1y:
Lead --
Arocnic
Copper
Harcury
Zinc
!iitro~cn and
Phosphate
Orr;:mics
Pesticides (voter. aeG~ent)
Gransan (, Oils
Biochoro.cal O::Yr:~n DCrland
Total Organic Carbon
Chcnicnl O~7r.cn Dc~~~d
nctcr~cnts
, Pheno19
Bacteria
"the cher.ical uato collected trill provi<!o valuabla backf.To\md inforT".wtion
on crlatin~ conJitioM ~n the study area. aD \.--011 :l3 docu!:'\Cntin~ the
chcr.d.cnl qu~it:r of runoff froD various typcs of lanu use occurring
uitbin the bnnino under conDideration.
Durinr; the Geconu phtl:lc of the projoct.phYD. oGr~ph1c parnti!Oter9 for c2ch
ulllected \ultcr!ihed uill bo conpilecl fro:\ aerial photor.rllpha, to;Jo!n"llphic
I.-lOpe. pl~Ulllill~ ar,eneienc!nta t ll."lO fieluobDervationo. Thio infon:~t:!.on
uill conoi!3t of oi::a, oh<lpc. Llnu olope of c1rcina[Q area, type and lloi't'ce
of Innd lWe, LU.lOtmt of ir::pcrviouo Area, type of otonu drainar,e. ooi1 ty?a,
infiltl"ation conditiona, and ourf:1ca area occur!uc! by lnkcc llnd mmups.
i:110 urb~lU \Jatcroileuo chocen v111 cover Do \lidr rc.nr,e of urbani::atiou
clwrcby c~nndillg oir:;ul.:1tion c:1}'nbility ofche calibratod otrennflotr oo~cl
nod pcrnit co:-.o unter <lulU-ity t::ol!cliue.
The final phll!>o of tho otudy trill involve calib1.-atinr. and vcrifyinp, 3
\lnterciled twuel U;Jillr. dnta collected in e~ch \intershcd. Vurinr, thin
})or10d. optiI:l',tn \;~ter~lled pnra:~ct:cro that provide: the be9tuh~ulfltio:1 of
OUGcrve:d runof~ dota trill be lielccteu. E:g;oricoca ~nincu in thin pr-OCCS:1
'w111 be valu..1ble in <1pply1n~ the cclibrntecl nodol to other vatcrohods
to uer1vc plonninr. nnd. t:L'UUgCDCut iofolWlltion.
Interprctativu rcporta end hnsic dnta reports \Jill bo nc1lOGulell for
role<l!Jc ~t vllriouo intel'"VnlD (~urinG the project. All of the l!nta collected
und 1nfor:::p.tion cOt:I;>11ed no part of thin ovorall project vill be published.
Cooperntor cat:! ncodu uno rcqllent for opecial allulyocB \1111 va procoDsed
no 111l,il1tef;rnl p<lt't of tho project.
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It 10 pr01JOsed that tho study bo 1t1plur.1cnted 08 ooon lUl pOBs1blc ortel;'
J3nuary 1, 197/,. Annunl cont of tho prol'oocd projc,ct for the C1ty of
Clean/ntar \.'111 he $G ,ooa annually for 6 conoccut1VQ ycnr9. nao U. S.
CcoloG1c31 ~urvey \l111 provide t"'.:lt;ch1uc~ fundo of $0,000 annually.
Aftor j.ou hnve rcvic\:od thio porpocnl, \lut.'ou1d liko to dioCU96 opecific
tlE:lpcct~ of the pror,ra~,l "dch you, oct:'.ucro of your ntaff, und pODoiLly your
onr;iIlCCriu[; conaultO!Jtu. \le \1i11 contact you later to arran go a convenient
meetinG thXl.
In the r~D.l1tiTJO, if you have questiono regll,rJing anyppart of the propo3cd
study, plca~c feel freo to call at nnytina.
Very tr=ly yours,
FOR TIm SUllDISTRICT CllIEF
Jsmco ' F. Turner
nydrologiot
cc: ' Cecil Henderson, Clcarwater
Ed Boyd, !!cI'arland ~ Johnoon, Conoulticg Lngincoro
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