Title: Explanatory Notes to Map Report
Full Citation
Permanent Link: http://ufdc.ufl.edu/UF00050811/00001
 Material Information
Title: Explanatory Notes to Map Report
Alternate Title: Explanatory Notes to Map Report WRI 76-80
Physical Description: 1p.
Language: English
Publication Date: January 5, 1977
Spatial Coverage: North America -- United States of America -- Florida
General Note: Box 1, Folder 10 ( POTENTIOMETRIC LEVELS ), Item 37
Funding: Digitized by the Legal Technology Institute in the Levin College of Law at the University of Florida.
 Record Information
Bibliographic ID: UF00050811
Volume ID: VID00001
Source Institution: University of Florida
Holding Location: Levin College of Law, University of Florida
Rights Management: All rights reserved by the source institution and holding location.

Full Text

S. .' -t. .a

.Donald R. Feaster, Euecutive Directr

Hydrogeological maps of this nature serve to record the status of groundwater
resources at some po i in time and to approximate the systerts net change over
others ,(1971) 5060 U.S. HIGHWAY 41, SOUTH -etROOKSVILLE, FLO IDA 3 1 l 12e
change from January 1964 to May 1969. PHONE (904) 796best available change

map of the Dis[rict when prepared, and has provided the District with useful water-
-resource mnagemRILent i r Chatiron. RI 76-80 wAS VAN VER, Scretary, Yankctown RovNAI LA
li^ MJ^-^ J. R. GRAW, Vice Chtri~nan, (Xcala S. C. BEXLF.Y, JR., Land O'Lakcs ROBLRT MARllNbZ. lainpa

ae JOrease i rH, renasurter, itsurg wls rOOKS JONg th akeland siS y. er, ad fr Ce
Donald R. Fcastcr, e Kccuivc Director


Hydrogeologica maps of this nature ser ve to record te s eaus ofni groundwaerstan
resources agroundwat some point in time and toinually being approximate the system's net chae numover

a span of tin wme. Such maps provide important cluster itdraals, y surey levelicon

tons ierlve e Southwest Florida Water Mangement Distric t i pr.es
Map report WRI 7-80 follows, me 100% in supplements, and superceds incorpHA-440 by Stewart an
others (971), which map depicautioned the potentiometric surface in May 1969 pause

water-level data, potentiometric conto1969.ur lines were interpolated and smoothed to
map conform with the known hydrogeology. Considerable hydrologistric judgment is exercised
in drawing change maps, i.e.,orm it is quite reasonable that different exprn overts could
interpolatincree such contours differently,hdrawa depending on the pastir individual knowledge of
rea conditions. Regarding WRI 76-80, the generalized colored change intervals
of +he groundwater system is con-11inually being advanced by increasing +he number
of observation wells in areas of large groundwater withdrawals, by survey leveling

of represent in wells, and by improved general way the trend of hydrologic change in the grogeoogundwater system
area through invest1igative studies. WRI 76-80 is based on more than one thousand
water-level measurements made in wells throughoutt the District, which represents
an improvement of some 100% in number of well data points incorporated into HA-440.

between n May 1969 and noMay o overlay he 199 and 1975 poen1975.meric surface
maps to obtain water- level changes. Such calculated changes will not always corre-
spond +o values on the WRI 76-80 change map which have been derived from field
observed data of actual water level changes in wells. Note that in areas of sparse
water-level data, potentiometric contour lines were interpolated and smoothed +o
conform with the known hydrogeology. Considerable hydrologic judgment is exercised
in drawing change maps, i.e., i+ is quite reasonable that different experts could

Where detailed and quantitative information is needed, the user should contact the
U. S. Geological Survey office in Tampa.


January 5, 1977

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