Consumptive Use Permitting

Material Information

Consumptive Use Permitting


Subjects / Keywords:
Water usage ( jstor )
Crops ( jstor )
Available water content ( jstor )
Spatial Coverage:
North America -- United States of America -- Florida


Consumptive Use Permitting
General Note:
Box 10, Folder 6 ( SF Water Crop - 1978-1979 ), Item 6
Digitized by the Legal Technology Institute in the Levin College of Law at the University of Florida.

Record Information

Source Institution:
Levin College of Law, University of Florida
Holding Location:
Levin College of Law, University of Florida
Rights Management:
All applicable rights reserved by the source institution and holding location.


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District Logos

3 Users (Collage)

Scene from Florida's past

Super over Aerial

Dense Population scene
(P/A area) Sarasota

Water scene

Note: 1) Begin with District Logos Cut to Title Slide

2) Consumptive Use Permitting 3) Visual of old Florida


The time was when the concern over the quantity of water

available for man's use was limited only to his ability to

locate a good source and then install the necessary equipment

to withdraw it.

Today, however, with increased use by agricultural, industrial
and domestic consumers and with more efficient methods of

finding and withdrawing water the concern now isn't limited

to merely locating water and pumping it, but with over-developing

and over-pumping it.

Likewise, if the extent of Florida's population and development

was limited to what it was a hundred years ago, there would be

little concern over our water uses. However, since the early

1960's, the state's population has expanded rapidly.

This tremendous growth rate has placedincreased demands

on the fresh water resources of Florida. If the growth

rate were uniform throughout the state and water with-

drawals to meet the increased demands were uniformly

distributed, the impact would not be as significant.

But southwest Florida has experienced a much greater

growth rate almost 115 percent since 1960, climbing from

1.2 million to 2.6 million in the last 18 years. However,

some area such as west Pasco County have experienced a 600%

population increase. This indicates that more people are

locating in the southwest portion of the state, causing a

sharp rise in the use of our water resources.

Throughout Florida there has been an increased concern for the

conservation of the fresh water resources. In response to this

S11 1 i iA ; I

Open Law Book
SWFIMD Regulatory
(Super Over Book)

Quote from law Super over
open law book

District Rules & Regulations
implemented Jan. 1, 1975

Water crop is amt. of
H20 annually available
for man's use

Water Crop (P)-(ET)

Consumptive use quote

concern, the Governing Board of the Southwest Florida Water

Management District established a regulatory district in 1968
under authority granted by Chapter 373 of the Florida Statutes.

Then in 1969 it began issuing well construction permits on all
wells two inches in diameter or larger, and began its first

efforts to regulate well fields using a hydrologic concept
referred to as the water crop.

In 1972, the District Board's responsibilities were broadened
when the Florida Legislature passed the Water Resources Act.
This act authorized the District to "effect the maximum bene-
ficial utilization, development and conservation of its water
resources in the best interest of all its people as well as to
prevent the depletion, waste and unreasonable use of those
resources." Among other permitting responsibilities the Water
Resources Act provided for the establishment of a consumptive
water use permitting program.

The District's Rules and Regulations for consumptive use
permitting were developed in 1974 and first initiated in certain
areas of the District in 1975. The water crop was then included

as one of the factors considered when evaluating an application
for a Consumptive Use Permit.

The amount of water annually available for man's use or water

crop, is an important tool in consumptive use permitting but
is not the only consideration. Water crop is defined as
precipitation less evapotranspiration. In other words, the
total water crop for a given area is generally considered to be

the amount of precipitation remaining after the processes of
evaporation and transpiration have taken place.

Consumptive use is defined as any use of water which reduces
the supply in the area from which water is withdrawn or
diverted. It can occur in the form of evaporation from

Scene Large Water User

If you pump:
-1,000,000 gal. an
avg. day or
-100,000 gpd annual
avg. or
-6" i.d. well or more

75 days to process a CUP -
(Super over office scene)

Scene Data Collection
(monitor well)

USGS Cooperative

Water crop chart

lakes, rivers and land surfaces; as transpiration from
plants; or as off-site discharge or transport of water.

Consumptive Use Permits are required by all who would use large
volumes of water generally, if the proposed withdrawal or the
facilities themselves fall within the following guidelines:
1. If the facility or equipment has the capacity to exceed
one-million gallons of water on any given day; or

2. If the average annual pumpage will exceed 100,000 gallons
per day; or
3. If the well to be used has an inside diameter of six
inches or more.

Normally, it takes about 75 days to process a Consumptive Use
Permit application. If a proposed water withdrawal will require
such a Consumptive Use Permit, that permit must be obtained,
or a petition for exception granted, before a well construction
permit will be issued.

From the beginning the District realized the need for reliable

hydrogeologic data to give the Governing Board and staff the
information they needed to make sound water management
decisions. As a result, it has had an ongoing cooperative
program with the U. S. Geological Survey since 1961 to gather

data and perform special investigations. The data from this

effort and the studies have proved to be Invaluable to the
District in determining the amount of water available for man's
use on a District-wide basis.

Scientists with the U. S. Geological Survey and the District

staff, using data from the Mid Gulf report published in 1968,
generalized that a District-wide average of approximately 52
inches of rain falls on our area. Of this total, 39 inches are
lost to natural and man-induced evapotranspiration. The
remaining 13 inches is the amount of water that maintains
storage in the aquifer as well as maintaining the flow of
the District's rivers and streams. This 13 inches of rain

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13" = 2.3 trillion gallons is the total amount potentially available for man's new use
within the District without depleting the amount of water
in storage.

This works out to roughly 640,000 gallons a day, or an
approximate average of 1,000 gallons per acre each day.

The District uses the 1,000 gallons per acre per day as
one of several guidelines in evaluating Consumptive Use
Permit applications for new uses of water. This application
of the water crop began in 1975 when the District implemented
its rules and regulations. Many people wrongly believe this
application of the water crop to be the only criteria used.

In 1972, three years before the rules were implemented,
the District applied the water crop concept to the municipal
well fields located in the Northwest Hillsborough Basin
in an effort to minimize the adverse environmental effects
beyond the well field boundaries. The need for regulation
there can be clearly seen in these views of St. Petersburg's
Section 21 Well Field, first, before pumping was begun;
second, after pumping began; and third, after the Governing
Board established regulatory levels. These regulatory levels
were designed to control the rate of movement from the
shallow aquifer to the Floridan aquifer.

Studies have shown that by controlling the rate of pumping
from the artesian aquifer, the quantity of water that will
leak downward from the surficial aquifer is also controlled.
Establishment of regulatory levels is done to assure proper
maintenance of the pressure difference between the two
aquifers, thereby assuring that lake levels and vegetation
beyond the well field boundaries are not adversely affected.
In other words, regulatory levels are set to allow the water
crop to be fully withdrawn from the shallow aquifer through
induced leakance from the shallow aquifer to the deep aquifer.

Consumptive Use Criteria

Quote a.

Quote b.

Quote c.

Quote d.

This help to confine any adverse effects to the area
within the well field boundaries.

This application of the water crop allows far more water

to be withdrawn for municipal supply purposes than would be
the case if the general application of 1,000 gallons an acre

per day on the overlying property were used. St. Petersburg's
Section 21 Well Field is an excellent example of the second

type of application of the water crop that is used when per-

mitting withdrawals that could result in significant adverse

effects beyond the Applicant's property boundary. The well

field totals some 600 acres, and under this second application

of the water crop, St. Petersburg pumped an average 9.6 million
gallons a day in 1978. This is 16 times more than could be
pumped there if withdrawals were limited to a thousand gallons
an acre. The same principle is applied to many other muni-

cipal well fields.

In determining how much water can be used consumptively, the
District uses other specific criteria, including an evaluation
of the potential for salt water intrusion, effects on stream-

flow, lake levels and vegetation, and the portion of the
Water Crop to be consumptively used, just to mention a few.

According to these criteria the proposed withdrawal of water:
"a. Must not reduce the rate of flow from a stream or

other watercourse by more than five percent (5%) at
the time and point of withdrawal.

b. Must not cause the level of the potentiometric surface
under lands not owned, leased, or otherwise controlled

by the applicant to be lowered more than five feet (5').

c. Must not cause the level of the water table under lands
not owned, leased, or otherwise controlled by the
applicant to be lowered more than three feet (3').
d. Must not cause the level of the surface of water in any
lake or other impoundment to be lowered more than one

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-L Li L -_. jA U .J- -L--

Quote e.

Aerial Dense population

Aerial scene of large
water user. (Ag. or

foot (1') unless the lake or impoundment is wholly

owned, leased, or otherwise controlled by the applicant.

e. Must not cause the potentiometric surface to be lowered

below sea level."

Like water crop, these criteria are guidelines and are not

considered as absolute limitations of water availability from

a particular tract of land. The Governing Board may grant

exceptions when, after consideration of all data presented,

including economic information, it finds that it is consistent

with the public interest.

Consumptive use permitting is an essential ingredient for

sound water management to assure protection of this valuable

resource. As Florida's population continues to grow, the

demand for potable water will also increase. The District

is committed to the task of assuring that all water uses

are reasonable, beneficial and consistent with the public

interest. In this way the needs of the people of Southwest

Florida can best be met, both now and in the future.

In the Future.....

Terminal Logos