Title: Agricultural Water Use, Agricultural Surface Water Management, Right-of-Way Occupancy of District Works
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Permanent Link: http://ufdc.ufl.edu/WL00004230/00001
 Material Information
Title: Agricultural Water Use, Agricultural Surface Water Management, Right-of-Way Occupancy of District Works
Physical Description: Book
Language: English
Publisher: South Florida Waste Management District Staff Report
 Subjects
Spatial Coverage: North America -- United States of America -- Florida
 Notes
Abstract: Jake Varn Collection - Agricultural Water Use, Agricultural Surface Water Management, Right-of-Way Occupancy of District Works (JDV Box 43)
General Note: Box 18, Folder 5 ( Pamphlets, Books, Articles, etc - 1960s & 1970s ), Item 14
Funding: Digitized by the Legal Technology Institute in the Levin College of Law at the University of Florida.
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Bibliographic ID: WL00004230
Volume ID: VID00001
Source Institution: Levin College of Law, University of Florida
Holding Location: Levin College of Law, University of Florida
Rights Management: All rights reserved by the source institution and holding location.

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Introduction to Staff Report


The following is a report which has been compiled by the District's
staff based on the information submitted in your application. Enclosed
you will find explanations of permitted values for such items as
monthly withdrawal for water use, allowable discharge for surface
water management and authorization for right-of-way occupancy.
Particular attention should be paid to the "Special Conditions" because
they may require action by the applicant after the permit has been
issued.

As an aid to the applicant, an "example calculation" section has been
included in order to better explain how the District staff calculates
monthly withdrawal and how to compute monthly pumpage. After
reviewing the staff report the applicant may wish to review the
example calculations. This may help clarify questions which the
applicant may have.

If the applicant has any questions about the permitted monthly with-
drawal, permitted allowable discharge, irrigation efficiencies,
method of calculation or any other items concerning his allocation
he should contact the Supervisor of Water Use, South Florida Water
Management District, Post Office Box "V", West Palm Beach, Florida
33402 (305/686-8800).





Dept. Of Envirnmental Repulation
RECEIVED

AUG 17 1979

OFFICE OF SECRETARY


SOUTH FLORIDA WATER MANAGEMENT DISTRICT

STAFF REPORT

Agricultural Water Use
Agricultural Surface Water Management
Right-of-Way Occupancy of District Works

Index Page

Introduction to Staff Report 1

Staff Report Summary 2

Water Use Evaluation

Explanation of Permitted Monthly Withdrawal 4
Derivation of Monthly Withdrawal 4
Derivation of Calculated Monthly Withdrawal 6
Water Use Example Calculations 7
Water Use Special Conditions
Groundwater 8
Surface Water 9
Reporting Monthly Pumpage to the District
Situation 1 Hours of Operation Known 10
Situation 2 Hours of Operation Determined from
Electric Bill 11
Surface Water Management (Drainage)
Surface Water Management Evaluation 13
Surface Water Management Special Conditions 14
Right-of-Way Occupancy
Right-of-Way Occupancy Evaluation 15
Right-of-Way Occupancy Special Conditions 15









STAFF REPORT SUMMARY (CONT'D)


SURFACE WATER MANAGEMENT:

8 Permitted Allowable Discharge:

Receiving Water:


NOTE:


Special Conditions (Page(s)


Prepared:


Checked:


RIGHT-OF-WAY OCCUPANCY:

( Permitted Authorization:


NOTE:


Special Conditions (Page(s)


Prepared:


Checked:


Richard A. Rogers, Director
Resource Control Department


Date:


Date:


Date:


Date:


Approved:


Date:


__









WATER USE EVALUATION


Explanation of Permitted Monthly Withdrawal

Two basic numbers are relevant to the permit. The first is the
installed capacity and the second is the calculated monthly with-
drawal. Florida Law offers protection to existing legal uses,
where such protection is obtained by the securing of a permit.
Hypothetically, the amount of water constituting a legal use could
be equal to installed capacity if all permittees withdrew water
for 24 hours a day under exactly the same conditions. Because
this is not the case, the District has computed a withdrawal amount
which equates amount of withdrawal to crop type grown over a
specific area in a geographic location characterized by specific
climate and soil characteristics in order to establish a common
basis of allocation. The withdrawal amount may vary from one
situation to another depending on the irrigation method. This
withdrawal quantity represents the quantity of water required for
optimum crop development at a specific location and, as such, is
an excellent basis for determining the entitlement of a user to
water. This calculated number therefore becomes his existing legal
use amount unless his installed facilities are not capable of with-
drawing that amount, in which case his existing legal use would
equal the installed capacity. The lesser of the two numbers (either
the calculated monthly withdrawal or installed capacity) is therefore
the permitted monthly withdrawal number. Both numbers are listed
above the permitted monthly withdrawal on Page 6 for comparison.

When the system is not under stress, either long term or short term,
there is no reason to prevent a permitted from using more than the
permitted monthly withdrawal amount and reporting this quantity as long
as the withdrawal is a reasonable-beneficial use and not harmful to the
water resources of the area. If the system should come under short term
stress, the District Board may declare a water shortage, at which time all
existing legal users might be cut back by a percentage of the calculated
monthly withdrawal amount. This would be done through the public hearing
process and allow adequate input by all parties. Users with installed
capacity less than the calculated monthly withdrawal number will not be
cut back, or not cut back as much as users with installed capacities
larger than the permitted monthly withdrawal.

If repeated shortages occur and long term stress is suspected, basin
rules may be required. These may be structured along lines which
consider the permitted monthly withdrawal amount as the legal use
amount. Again, such action would be through the public hearing
process allowing public input.

Derivation of Calculated Monthly Withdrawal

Calculated monthly withdrawal is the amount of water computed by the
District staff as necessary to supplement rainfall for optimum








crop growth during the driest month of a drought having a statistical
probability of occurring once in every five years.

The calculated monthly withdrawal is computed utilizing a modified
Blaney-Criddle method. The Blaney-Criddle method estimates the
amount of water required by certain crop(s) based on humidity
conditions, hours of sunlight, type of crop and mean monthly
temperatures at a particular location. The District has also
included correction factors for one in five year drought rainfall
and soil type(s) in the calculations to increase the applicability
of the method to the applicant's area.

The calculated monthly withdrawal is twice the Blaney-Criddle amount.
Doubling of the Blaney-Criddle amount allows for irrigation inefficiencies.
The applicant may receive an even higher allocation if flood
irrigation is used, since flood irrigation allows rapid return of
water to the system. For flood irrigation systems, the applicant
is given 14 inches/acre/month "quick return" credit for citrus and
20 inches/acre/month for vegetables. These values are derived from
the storage capacity of an average size furrow and assuming an
average number of irrigations per month.

In summary, the applicant's calculated monthly withdrawal is
computed by multiplying the crop requirement obtained from the modified
Blaney-Criddle method by 2 and then if applicable, adding the
water allocated for the "quick return" from flood irrigation.

It should be noted that the calculated monthly withdrawal is
applicable only during a declared water shortage and at all other
times the permitted may withdraw in excess of this amount using
the facilities described in this permit without penalty or as long
as the withdrawal is a reasonable-beneficial use and not harmful to
the water resources of the area unless indicated otherwise by the
Special Conditions to the Permit.










Calculation of Monthly Withdrawal


Crop requirement 1

Crop requirement 2

Crop requirement 3


in/mo x

in/mo x

in/mo x


acreage of crop x 2 (50% irrigation efficiency) =

acreage of crop x 2 (50% irrigation efficiency) =

acreage of crop x 2 (50% irrigation efficiency) =


Sub-total:


acre-inches/mo.

acre-inches/mo.

acre-inches/mo.


acre-inches/mo.


NOTE: Credit for
?food irrigation
added when appli-
cable.


(credit)


in. x


acreage of crop =


acre-inches/mo.


Total


acre-inches/mo. x .02715 =


MG/mo.


Calculated Monthly Withdrawal MG



Monthly Withdrawal Capacity of Installed Facilities MG


Permitted Monthly Withdrawal

(Also equal to


acre-inches)









WATER USE EXAMPLE CALCULATIONS

In order to aid the permitted in his understanding of the District's method of

water allocation, example problems addressing monthly withdrawal and reporting

of monthly pumpages are presented in the following pages. (The permitted

should be aware that these are generalized examples and, as such, the numbers

specified in the examples will not usually relate to his particular situation).

Calculated Monthly Withdrawal

Example: A grove owner operates 500 acres of citrus in the Jupiter area.

250 acres of the grove are irrigated by drip and overhead sprinklers, and

250 acres by flood. What would be the owner's calculated monthly with-

drawal for the worst drought in a five year period?

Employing the Blaney-Criddle equation and considering the soil types and

rainfall in the Jupiter area, a value of 3.4 inches/month for the

irrigation requirement has been derived. Therefore, 3.4 inches/month

x 500 acres = 1700 acre-inches/month. Since the irrigation system is

considered 50% efficient the quantity of water must be doubled: 1700

acre-inches/month x 2 (efficiency) = 3400 acre-inches/month. However,

since 250 acres are flood irrigated an additional 14 acre-inches/month

must be allowed (Flood credit); therefore, 250 acres x 14 acre-inches/

month = 3500 acre-inches/month. The total acre-inches of water may now

be calculated: 3400 acre-inches from the Blaney-Criddle method

(including efficiency) + 3500 acre-inches from flood irrigation credit

gives a total of 6900 acre-inches per month. 6900 acre-inches or = 187

million gallons per month is the total calculated monthly withdrawal for

500 acres of citrus during a one in five year drought period.









WATER USE SPECIAL CONDITIONS


GROUNDWATER


1. DURING PERIODS IN WHICH THERE IS NO DECLARED WATER SHORTAGE, WITHDRAWALS
GREATER THAN THOSE ESTIMATED BY THE DISTRICT MAY BE MADE UTILIZING THE
FACILITIES DESCRIBED HEREIN WITHOUT VIOLATION OF THE CONDITIONS OF THE
PERMIT AS LONG AS THE WITHDRAWAL IS A REASONABLE-BENEFICIAL USE AND NOT
HARMFUL TO THE WATER RESOURCES OF THE AREA.

2. IN THE EVENT OF A DECLARED WATER SHORTAGE, WATER WITHDRAWAL REDUCTIONS MAY
BE ORDERED BY THE DISTRICT IN PROPORTION TO THE CALCULATED MONTHLY WITH-
DRAWAL.

3. MONTHLY WITHDRAWALS SHALL BE REPORTED TO THE DISTRICT IN MAY AND NOVEMBER
ON FORMS PROVIDED BY THE DISTRICT.

4. DRILLER'S COMPLETION REPORTS AVAILABLE FROM THE DISTRICT SHALL BE SUBMITTED
FOR NEW WELLS UPON COMPLETION OF CONSTRUCTION.

5. THE DISTRICT SHALL BE NOTIFIED BY LETTER AT LEAST 14 DAYS PRIOR TO THE
INSTALLATION OF NEW WELLS.

6. PERMITTED SHALL SUPPLY THE DISTRICT AND THE FLORIDA BUREAU OF GEOLOGY
WITH DRILL CUTTINGS FROM ANY NEW WELLS. THE CUTTINGS SHALL BE COLLECTED
EVERY FIVE FEET OR EVERY FORMATION CHANGE, WHICHEVER COMES FIRST. WELL
LOGS AND LOCATION MAPS OF THE WELL SHOWING DISTRICT PERMIT NUMBER SHALL
BE SENT TO BOTH THE DISTRICT AND THE BUREAU OF GEOLOGY WITHIN SIX MONTHS
OF THE DATE OF CONSTRUCTION. THE ADDRESS OF THE FLORIDA BUREAU OF GEOLOGY
IS AS FOLLOWS: FLORIDA BUREAU OF GEOLOGY, 903 WEST TENNESSEE STREET,
TALLAHASSEE, FLORIDA 32304. THE ADDRESS OF THE DISTRICT IS: SUPERVISOR,
WATER USE SECTION, SOUTH FLORIDA WATER MANAGEMENT DISTRICT, POST OFFICE
BOX "V", WEST PALM BEACH, FLORIDA 33402.

7. SOURCE CLASSIFICATION FOR WITHDRAWAL IS

8. USE CLASSIFICATION IS

9. THIS PERMIT WILL EXPIRE ON

10. IF AT ANY TIME THERE IS AN INDICATION THAT THE WELL CASING, VALVES OR
CONTROLS LEAK OR HAVE BECOME INOPERATIVE, REPAIRS OR REPLACEMENT SHALL BE
MADE TO PUT THE SYSTEM BACK IN OPERATING CONDITION ACCEPTABLE TO THE
DISTRICT. FAILURE TO MAKE SUCH REPAIRS SHALL BE CAUSE FOR FILLING AND
ABANDONING THE WELL IN ACCORDANCE WITH PROCEDURES OUTLINED BY THE DEPARTMENT
OF ENVIRONMENTAL REGULATION AND WITH THE CONCURRENCE OF THE DISTRICT.

11. WITHDRAWAL FACILITIES ARE









WATER USE SPECIAL CONDITIONS

SURFACE WATER


1. DURING PERIODS IN WHICH THERE IS NO DECLARED WATER SHORTAGE, WITHDRAWALS
GREATER THAN THOSE ESTIMATED BY THE DISTRICT MAY BE MADE USING THE
FACILITIES DESCRIBED HEREIN WITHOUT VIOLATION OF THE CONDITIONS OF THE
PERMIT AS LONG AS THE WITHDRAWAL IS A REASONABLE-BENEFICIAL USE AND NOT
HARMFUL TO THE WATER RESOURCES OF THE AREA.

2. IN THE EVENT OF A DECLARED WATER SHORTAGE, WATER WITHDRAWAL REDUCTIONS
MAY BE ORDERED BY THE DISTRICT IN PROPORTION TO THE CALCULATED MONTHLY
WITHDRAWAL.

3. MONTHLY WITHDRAWALS SHALL BE REPORTED TO THE DISTRICT IN MAY AND NOVEMBER
ON FORMS PROVIDED BY THE DISTRICT.

4. SOURCE CLASSIFICATION FOR WITHDRAWAL IS

5. USE CLASSIFICATION IS

6. THIS PERMIT SHALL EXPIRE ON

7. WITHDRAWAL FACILITIES ARE









REPORTING MONTHLY PUMPAGE TO THE DISTRICT


Situation 1:


Hours of Operation Known:

The permitted knows the rate* of his pump(s) and the

number of hours which the pump(s) has operated. The

monthly pumpage may be calculated as follows:

Hours of operation x total pump rate (in gallons per

minute) x 60 = number of gallons pumped during the month.

Example: A grove owner has three (3) pumps which he

utilizes to pump irrigation water to his grove. The

driller who installed one of the pumps has told the owner

that this pump will deliver 500 GPM. The owner

determines the capacities of his other pumps from the

pump plates and obtains values of 400 GPM and 400 GPM.

During the month of June the pumps were operated a total

of 600 hours (200 hours apiece). What would be the grove

owner's pumpage for the month of June?


Solution:


200 hours x (500 + 400 + 400) x 60 =

15,600,000 gallons.

(hours of operation) x (total pumping rate in

gallons/minutes) x (minutes/hour) = (gallons/month).


*If permitted does not know the pump rate, this rate can normally be read from

a plate attached to the pump. The rate will be under the heading "Pump

Capacity". This value is usually in gallons per minute (GPM), but the

permitted should check the units.


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Situation 2:


Hours of Operation Determined From Electric Bill

The permitted knows the pump capacity (either from the

installer or the pump plate), but has not kept track of

the number of hours of operation. If the permitted has

electric bills for the pumps the monthly pumpage may be

calculated in the following manner:


Take the total number of kilowatt hours from the electric

bill and multiply by 1.341. Divide this value by the

total horsepower (listed on motor plate) of all the metered

pump motors) and multiply the results by 0.8**. This

yields the total time that the pumps were operated in

hours. This value multiplied by the flow rate of the

pump(s) (in GPM) x 60 yields the number of gallons pumped

during the month. In equation form:

Kilowatt-hrs/month x 1.341 hp/Kw
Total HP of Pumps x 0.8 x 60 x pumping rate in GPM = Gallons/Month


Example: A tomato producer utilizes 4 electric turbine

pumps to supply irrigation water to his crops. His total

number of kilowatt hours on all pumps during May was 5000.

The pump motors are 5 horsepower each and have a pumpage rate

of approximately 500 gallons per minute each.




**Assumes 80% efficiency


-11-


.'.. 1. -. ~ .












Approximately how many gallons did the grower pump during

the month of May?


5000 Kilowatt hrs x 1.341 = 6705 (horsepower hrs)

6705t 20 (total motor horsepower is equal to 5 HP x 4 pumps) x.8 = 268

268 hrs x 2000 (total GPM of pumps) x 60 (minutes per hour) =

32,184,000 gallons during May.



Another common method of water transport is by the use of diesel

or gasoline powered pumps. The District has not performed

example calculations concerning these types of systems due to the

great variability in which the pumps are operated. However, the

producer should be able to estimate his fuel consumption to water

pumped ratio and utilize this figure to obtain the quantity of

water pumped.

As a last resort, the applicant may estimate the number of hours

which the pump operated and calculate according to Situation 1, or

supply the District with the amount of land irrigated and the

time during which the irrigation process takes place. Should

the applicant have a complex system, or should other special

circumstances present a problem in the reporting of the pumpages

he should contact the District.


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SURFACE WATER MANAGEMENT EVALUATION


APPLICANT'S LAND AREA:

FACILITIES:

1. EXISTING:


ACRES


DRAINED ACREAGE:


2. PROPOSED:








EXISTING DISCHARGE CAPACITY:

DRAINAGE BASIN:
RECEIVING WATER:


RUNOFF FORMULA:


RETENTION METHOD
RETENTION PROVIDED

ADDITIONAL COMMENTS:





PERMITTED ALLOWABLE DISCHARGE
INSTALLED DISCHARGE CAPACITY


cfs

cfs


ACRE-FEET


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SURFACE WATER MANAGEMENT SPECIAL CONDITIONS


1. DISCHARGE FACILITIES:

DESCRIPTION:




RECEIVING WATER:

2. WATER QUALITY DATA FOR THE WATER DISCHARGED FROM THE PERMITTED'S PROPERTY
SHALL BE SUBMITTED TO THE DISTRICT AS REQUIRED. PARAMETERS TO BE MONITORED
INCLUDE TOTAL SUSPENDED SOLIDS, NITRATES AS N, NITRITES AS N, TOTAL KJELDAHL
NITROGEN AS N, AMMONIA AS N, TOTAL PHOSPHORUS AS P, ORTHO-PHOSPHORUS AS P,
5 DAY 200C BOD, TURBIDITY, SPECIFIC CONDUCTIVITY, DISSOLVED OXYGEN AND pH.
IF WATER QUALITY DATA IS REQUIRED, THE PERMITTED SHALL PROVIDE DATA ON
VOLUMES OF WATER DISCHARGED, INCLUDING TOTAL VOLUME DISCHARGED DURING THE
DAYS OF SAMPLING AND TOTAL MONTHLY DISCHARGES FROM THE PROPERTY. WATER
QUALITY DATA IS/IS NOT REQUIRED AT TIME OF PERMIT ISSUANCE.

3. SPECIAL CONDITIONS OF RULE 16K-4.38 (SURFACE WATER MANAGEMENT) ARE WAIVED
UNLESS OTHERWISE PROVIDED HEREIN.

4. THE PERMITTED'S ALLOWABLE DISCHARGE IS CFS. WITHIN 120 DAYS AFTER
WRITTEN NOTIFICATION BY THIS DISTRICT THE PERMITTED SHALL REDUCE HIS
MAXIMUM CAPACITY WITHIN THE LIMITATIONS CITED HEREIN.

5. FACILITIES OTHER THAN THOSE STATED HEREIN SHALL NOT BE CONSTRUCTED WITHOUT
AN APPROVED MODIFICATION OF THIS PERMIT.

6. LAND USE SERVED BY THE PERMITTED FACILITIES IS PROPOSED
CONSTRUCTION OF RESIDENCES MAY REQUIRE MODIFICATION OF THIS PERMIT AND
MUST BE REPORTED TO THE DISTRICT.

7. THE PERMITTED SHALL BE RESPONSIBLE FOR THE CORRECTION OF ANY EROSION,
SHOALING OR WATER QUALITY PROBLEMS THAT RESULT FROM THE CONSTRUCTION OR
OPERATION OF THE SURFACE WATER MANAGEMENT SYSTEM.

8. DISCHARGES OF PUMPED WATER OR RESERVOIR DISCHARGES OF WATER ONTO ADJACENT
LANDS MAY BE CONTINUED TO THE EXTENT THAT PROBLEMS ARE NOT CAUSED BY
SUCH DISCHARGES.


-14-









RIGHT-OF-WAY OCCUPANCY EVALUATION


Permitted Authorization:


Performance Bond:


Insurance:


[7] Required

[ Required


[ ]Not Required

[ Not Required


SPECIAL CONDITIONS:

1. THIS PERMIT REPRESENTS APPROVAL OF THE PROJECT ONLY TO THE EXTENT OF THE
DISTRICT'S INTEREST IN THE PROJECT WORKS RIGHT-OF-WAY. ANY ADDITIONAL
APPROVAL OR PERMITS WHICH MAY BE REQUIRED ARE THE SOLE RESPONSIBILITY OF
THE PERMITTED AND MUST BE OBTAINED PRIOR TO COMMENCEMENT OF CONSTRUCTION.

2. PERMITTED AGREES TO HOLD AND SAVE THE SOUTH FLORIDA WATER MANAGEMENT
DISTRICT AND ITS SUCCESSORS HARMLESS FROM ANY AND ALL DAMAGES, CLAIMS
OR LIABILITIES WHICH MAY ARISE BY REASON OF THE CONSTRUCTION, OPERATION,
MAINTENANCE OR USE OF THE WORK OR STRUCTURE INVOLVED IN THE PERMIT.

3. THE APPLICATION, INCLUDING ALL PLANS AND SPECIFICATIONS ATTACHED HERETO,
IS BY REFERENCE MADE A PART OF THIS PERMIT.

4. THIS PERMIT MAY BE CANCELLED UPON THIRTY (30) DAYS WRITTEN NOTICE TO THE
PERMITTED OR UNDER ANY EMERGENCY CIRCUMSTANCES AS SET FORTH IN THE DISTRICT'S
RULES WITH WHICH PERMITTED IS PUT ON NOTICE.

5. THIS PERMIT, IF ISSUED, DOES NOT CONVEY TO PERMITTED ANY PROPERTY RIGHTS
NOR ANY RIGHTS OR PRIVILEGES OTHER THAN THOSE SPECIFIED HEREIN, NOR RELIEVE
THE PERMITTED FROM COMPLYING WITH ANY LAW, REGULATION OR REQUIREMENT
AFFECTING THE RIGHTS OF OTHER BODIES OR AGENCIES.

6. ALL STRUCTURES AND WORKS INSTALLED BY PERMITTED SHALL REMAIN THE PROPERTY
OF THE PERMITTED.


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