..ithacoocheerompage 1974 TURN LQ OUT TO BE
measured flow of about 10 mgd, between ANOTH R RAI -SRT YEA
Holder and Lake Rousseau increases the ANOTH ER RAiI- 4SHORT YE\R
total average river inflow to the lake to about
m3 mgd. In spite of the heavy rains that inundated west central Florida last
SAdditional inflow to Lake Rousseau of July, 1974 turned out to be another year of semi-drought for the area.
about 509 mgd comes from Rainbow Spring Although a few rainfall-measuring stations reported above-average
and Blue Run. Thus total average daily stream precipitation for the year, 72% of them reported deficit rainfall [less
inflow to the lake is 1,271 mgd. At average
flow rates, Rainbow Spring drainage contrib- than the average precipitation recorded for the years 1931-1960].
utes about 40% of the total inflow into Lake This section of Florida has been plagued been below normal. During the past 12 years
Rousseau. Truly, this makes the Rainbow by a shortage of rainfall for more than 20 alone, rainfall at Tampa has registered a
Spring tributary drainage basin the principal years. cumulative deficit of 104 inches. [This year's
tributary to the Withacoochee River even For 15 of the past 23 years, rainfall has rainfall data brings the cumulative deficit to
in times of average flow. 121 inches in 13 years.]
But its importance can be determinednches in 13 years.]
The year 1974 brought no relief to this
better by comparing the 95% duration flows Pump The year 14 broht
of these two tributaries to the lower With- long-term pattern:
lacoochee River. The 95% flow duration is The rain-gaging station at TAMPA
that flow which is equalled or exceeded 95% Tests Scheduled INTERNATIONAL AIRPORT reported a year-
of the time. It is a very low flow, such as end total of only 33.80 inches compared to
occurs during long periods of dry weather Pump tests for the new Starkey Wellfield normal rainfall of 51.57 inches. This repre-
when water-supply is in greatest demand. east of New Port Richey are tentatively sented a whopping deficit of 17.77 inches for
At such periods of low flow, the quantity scheduled later this month. that station.
entering Lake Rousseau from the upper With- The purpose of the tests is to collect data The PLANT CITY station reported a total
lacoochee is about 165 mgd while the flow on the impact the wellfield will have, when rainfall of 41.44 inches for the year, a decrease
from the Rainbow tributary area contrib- pumping at maximum rates, upon the water of 14.87 inches from normal.
utes about 70% of the total flow into the resources of the surrounding area. of 14.7 inches from normal.
Lower Withlacoochee; by contrast, the Upper The City of New Port Richey is presently The LAKELAND station reported 4416
Withlacoochee only contributes 30%. Thus, pumping one million gallons per day from an inches in 1974, 7.21 inches below the 51.37
the Rainbow Spring drainage basin is a prime existing well on the property. Construction inch average.
tributary to the Withlacoochee. of several monitor wells and three new pro- The Babson Park Station near BARTOW
C't has been shown above that the Rainbow duction wells has now been completed. Up turned in a year-end total of 48.83 inches. This
.ring hydrologic system, (Rainbow (Blue) to 4 million gallons per day may be with- represented a 4.35 inch deficit from the
Run, the springs themselves, and the con- drawn from the wellfield to supply the needs 1931-1960 average of 53.18 inches.
tributary extensive underground drainage of Port Richey and New Port Richey. The INVERNESS station reported 47.93
system) comprise, in total, a prime tributary The wellfield occupies a 107.5-acre tract inches in 1974, 8.42 inches short of its normal
system to the Withlacoochee and thus are an in the J. B. Starkey Wilderness Park (See 56.35 inches.
integral part of the Withlacoochee Basin. story on page 1). The District made the tract CLERMONT station showed a ear-
available to New Port Richey-troubled by The CLERMONT station
HHYDROSCOPE -_ salt-water intrusion into its previous well- end total of 48.32 inches. This was 5.97 inches
field-for development as a public water- below the 51.23 average for that station.
This document is produced monthly at an supply source. The HILLSBOROUGH RIVER STATE
annual printing and postage cost of $3,147.00 Under a 1974 contract between the PARK reported a substantial [7.57 inch]
to provide public officials and private citi- City of New Port Richey, their testing will deficiency. Only 48.32 inches of rain fell there,
zens a current source of information about be under the continual observation of the compared to a 55.89 inch norm.
the Southwest Florida Water Management District and/or the U. S. Geological Survey. The station at BUSHNELL reported a
District and its programs. During the tests, the existing well will be shortfall of 3.10 inches. Total 1974 rainfall
BOARD OF GOVERNORS of the South- pumped at a production rated 1,400 gallons there was 51.20 inches compared to an
west Florida Water Management District per minute and their newly constructed average of 54.30 inches.
(P. O. Box 457, Brooksville, Florida 33512) production wells will be pumped at a rate of Three gaging stations, however, did report
700 gallons per minute. Three aging stations, however, did report
Derrill S. McAteer, Chairman Evaluation of data from their tests could above-average precipitation for the year,
Robert E. Vaughn, Vice Chairman result in a reduction of production rates. including one that showed a substantial
J. R. Graw, Treasurer The contract also stipulates that pumpage difference.
Joe E. Hill, Asst. Treasurer from the wellfield shall not "at any time" The station at ISLAND FORD LAKE In
Thomas M. Van Der Veer, Secretary exceed 4 million gallons per day "unless or Northwest Hlillsborough County reported a
N. Brooks Johns, Asst. Secretary until an agreement exists by and between year-end total of 77.83 inches. The 1931-1960
John A. Anderson, Member the City and Pasco County for the develop- average for that station is 50.26 inches.
Herman Bcville, Member ment and use of said additional water" and The reporting station at ST. LEO in Pasco
( S. C. Bexlcy, Jr., Member unless the District agrees in writing to their County also showed a better-than-average
v )Donald R. Feaster, Executive Director expanded production.ear. total of 59.50 inches as recorded
Mygnon Evans, Editor The contract also requires that all facilities ear.A i ,
Donna K. Parkin, Asst. Editor in the wellfield be built and maintained in a there, 2.11 inches e o ralso rcor
manner compatible with the use of the lands at BR
:,lti,rn to mail at second class postage as a natural wilderness park and recreation ded an abolc-normal amount: 59.18 inches
:ats is i:ci1Jifdm at lBrooksville, Florida. area. compared to a normal 58.05 iaicles.
OE FFK ,q7<
WHERE ARE PROPEL BOUNDARIES OF WI.LiLACOOCHEE BASIN ?
GARALD G. PAiKKr 1
PEDRO A H R 1N ANDEZ .
Chapter 16% .- F, IF.;India Siatutes states N\
Jhat1 "The arca of the iPissrict (!WF0WMUV i7^cr
is divided into waters he ba;: t o include L *
each major so.:@fl1' and its triutaiy Sreau.s EPL A A INATO A
aIk ahi 'ads C'rAin-g th:eein except the NTO
Green Swai *x-',i.ershed basin." is our in- WW .
tent to show ;hat the largest part of the cur- I-" ,
rently constituted iWccasassia asin is a i BaJsiRY a 4
tributary ol the i ithia.,ochee River n"ROUND-WS '"-: ,TS
Two of the eleve:- basins within this PENNSULR FLA. NYDROLo oCo.E IF /, ..".
A.;ricrt are die Waccass sa aL.J the '-tia- GRr wN-W&ER FLOW DIRE CTk N
,:,ochet. The latter ha its headwaters in the ;
Green Swamp 120 to 130 feet aboa.e sea FIGURE 1
level, wlherca d.iec former has miiuch lower,
heretofore indefinite and gcwpraily poorly _XPLANT ON
aldn ferstood hydroiogit boundJaries and drain- SPNIFI EoDo BYA
A.ge. In .enlr::, boi,;daries of the designated J
.ive;r bsins folks surface-water divides, ex- G RBAOUNDA' o
ceplrig the Gr.--. ;- '.amp Basin. ( r
b'i-. \,tho were ch,,.: with dravsing the
"" .LANDS D .ING TO BL ',
".ouindanes. had difficult ii some areas dis- SNaP ND I,4, ,\
.:c-ri;. diAirni ... ,ii:Jes because of the non-
S.xistence of discsrnable stream headwaters F '
cin in those areas having good or reasonably ` -S
fsood t'.,ogr;'.1phic maps. Son- parts of he // riV I
Jis:, ared. nor covered yet by topographic A
?;iapp)nr a-'d, for the remaining mapped \ L_
.::'a the maps ui.iIaliy ha;e.< nly .lffoot con Y L
tCuc luhvis. Thus, in ver flat adrd swamnpy
arca at; ^ lmost r'possibl to determine NrS
just -here a stream begin'. r, in down1stisar'cam I .
swampy rcasiI, rven where its .hane cl should
be ;o.ated it follows riat some unavoidable FIGURE 2
,.r.rs we.re made in drawing basin boundaries, defined. Rainbow Spring and Blue Run from the With-
iP addition to iee:: errors .- those Figure 2 shows the nirthern part of lacoochee Basin. This -:..cluded area produces
.ui::... by the fact that s-ida- water basins, Figure 1, enlarged and without ground- more runoff per square mile (I4.49 inches
i l-':ct-irrated by topographic divides, do water flow arrows. Unfortunately, this infor- per year) than any other part of the With-
not always coincide with natural ground- mation had not been prepared prior to the lacoochee River Basin.
water divides. time that the original basin boundaries were The Withlacoochee River's main stem,
Tuts it was that, when the Waccasassa established, nor was such information avail- from its origin in the wetlands of the Green
Basin was drawn, it included a total area of able when the subsequent decision was made Swamp to its mouth in Withlacoochee Bay,
1,220 square miles. But more than 72% of to transfer the Waccasassa Basin to the new is some 140 miles long. Not counting the
this vast area, lying in its eastern part, is Suwannee River Basin Water Management Rainbow Springs drainage area, the With-
drained not by the Waccasassa River, which District. With the new information now lacoochec's drainage area is 2,020 square
has a drainage of only about 550 square available it can be shown that the 876 square miles. Including it would increase the river
miles, but by ground-water discharge into miles of the Waccasassa Basin's Rainbow basin's size to about 2,896 square miles.
Rainbow Spring and by numerous smaller Springs-Blue Run drainage constitutes the Flow of the Withlacoochee must be esti-
springs and seeps into Rainbow (Blue) Run. major tributary to the Withlacoochee River. mated in its lower 38 miles. The river is
The area involved in this large ground-water Both the map makers of 1961 and the tidal below the Inglis Dam. Lake Rousseau
drainage is about 876 square miles and its recent map changers of 1972 recognized that occupies that part of the river valley upstrcaJ.'
total runoff is to the With!acoochee at a Rainbow Spring lanld Blue Run, of themselves, from InHlis )Damn for about 13 miles. The
line-juncture cast of Dluninclloni. Figure 1 constitute a tributary system to tih Withla- first U. S Geological Survey sircanm-gaein:'.
shows, by nmealns of arrows indicative of re- coochee. ConsequlCently the basin boundary is station upstream froni the moitlth that i
ionial ground-watcr flow, the area contri- diawin to include Rainbow Spring and Blue fted by titles or huiimani cntriols i' t .r
mutring drainage to the Wilhlacooch. Other Run within the Withllacooclhee Basin. low I,, ir, 3: miles above ti ioulIi. Heit, i ,.
-rrows ilti.( tie I low o otlier pli;ic oi dis- ever, lacking ani i h istlanding of (lie xltlent veii g discharge i s aboir 7 .' miigd lul i it '
Siarge, anid by drawing Iiie. between diver- f the lands draining tllieretlo, the tbounlldary
t'cnt flow I I irns, grounilid-water basins .re dcliiieitors excluded this trillnlary area to ( t i 'tl i l on p -t