System Dynamics Modeling for New Mexico’s Upper Gila and San Francisco Rivers November 14, 2007 Amy Sun, Vince Tidwell, Will Peplinski, Geoff Klise, Alison Williams, Jim Brainard Geohydrology Sandia National Laboratories [email protected], (505)284-5861 Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy’s National Nuclear Security Administration under contract DE-AC04-94AL85000.
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System Dynamics Modeling for New Mexico’s Upper Gila and …€¦ · · 2018-03-01BillEvans SW WD Gilaredrock Gilaheadwater Input Routed Flow Redrock Routed Flow SFClifton Routed
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System Dynamics Modeling for New Mexico’s Upper Gila and San Francisco Rivers
November 14, 2007
Amy Sun, Vince Tidwell, Will Peplinski, Geoff Klise, Alison Williams, Jim Brainard
Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy’s National Nuclear Security Administration
• 1964 Gila River ApportionmentUS Supreme Court adopted a stipulation to allow equitable apportionment of Gila River between AZ and NM. NM beneficial use of Gila water (totaling 30,000 AF/yr) is declared and enforced by the OSE.
• 1968 Central Arizona Project (CAP)NM is allowed an additional 180,000 AF over any running 10-yr period. This provision did not allow funding for NM to divert add’l 18,000 AF/yr, and did not allow diversion over objections of Sr. downstream users.
• 2004 Arizona Water Settlement Act (AWSA)180,000 AF is reduced to 140,000 AF.Funding is provided to NM to administer its CAP water.Consumptive Use and Forbearance Agreement (CUFA) spells out the terms of NM diversion without objections of downstream users.
Other Context
• On June 3, 1924, at Aldo Leopold's insistence, Gila became the world's first designated Wilderness area (and also New Mexico's largest Wilderness). It is comprised of 558,014 acres and now administered by the USFS.
SF Reserve gauge
Largo Creek
HigginsTributary flow
To Alma
Jones
Romero
Kiehne
Middle FriscoTularosa River
San Francisco(1889,1890,1889,1900)
Lower Frisco(1850,1900)
Higgins (1875)
Kelly
Balke (1891)
Saliz Creek
GSF AgricultureElaborate Ditch Conveyancedating back to 1800s.
Gauge
Cienega
Cienega Creek
Pond/Reservoir
Ditch
Hightower
The School
Ditch#1 (1885)Ditch (1907)
Nigrito CreekBrennard (1907)
Romero-Cordova (1885)
Motivation for Modeling• Drivers
– NM Consumptive Use and Forbearance Agreement • additional 140,000 AF of Gila Basin water can be diverted in any ten-year
period.• $66 and $128 million to be used for efforts related to meeting water
demand.– Lower Colorado River Compact.– Unique ecology in the region.– Co-existence of agricultural, mining, and human demands.
• Objectives– Create decision support tool to address the following questions:
• Given various constraints, how much water is available from where, when and to what purpose?
• Given various constraints, how much water is in demand from where, when and to what purpose?
• What are the tradeoffs among various approaches to managing this water?
– Provide a medium for communicating with decision-makers and the public.
Collaborative Modeling Team• Implemented an open and transparent model
development process:
• Team met between October 2005 and July 2007.• Team met every other week for roughly two hours via
WebEx. https://waterportal.sandia.gov• Face-to-face every quarterly.• May, June, July 2007 workshops.
GOAL => Public software
Membership is voluntary.Participation is required.Team develops causal structure of model.Team identifies data.Sandia develops model.Team reviews model and output.
Team CompositionBureau of ReclamationNew Mexico Interstate Stream CommissionUS Fish and Wildlife ServiceMunicipalities of Silver City and DemingSoil and Water Commission representatives from Grant, Catron, and Luna CountiesThe Nature ConservancyGila Conservation Coalition Concerned citizensSandia National Laboratories
Meeting Venue http://waterportal.sandia.gov
GSF Study Area
SW Structure Follows A Coarse-Grained Physical Description
Reaches Delineated by Flow Gauges and Natural Boundaries
– Subreaches are created to capture “critical” sections.
SD using PowerSim
Note: These two gagesneed to be correctlyrouted to flow into
"Storage CliftonSolomon"- rpt060515
Gila river from Gila Gauge to Redrock Gauge
Gila River Redrock Gauge to Virden Gauge
Gila River from AZ-NM Border toClifton Gauge
SF Reserve to SF Glenwood
(GilaRiver Clifton Gauge + SF-Gila Confluence) to Solomon
Gauge
Note: This Routed flwo hasn'tbeen calculated because I need to
decouple Dick's CliftonSolomonequation into two segments
SF River Glenwood Gauge to NM-AZBorder
This quantity will beobtained from thewatershed model
These outflows are conntected to the GW basinsin a separate diagram marked GW. River
Leakage can be positive or negative dependingon the relative head difference between thereach and its neighboring shallow aquifers.
Gila river from Headwater to Gila Gauge
SF River from NM-AZ Border toSFClifton Gauge
SF Headwater to Reserve
Gila River from Virden Gauge toGila Clifton Gauge
Gila River from Virden Gauge toAZ-NM Border
SFRiver Clifton Gauge to SF-Gila Confluence
#
#
#
#
#
#
#
#
#
#
#
#
Storage GilaRedrock
Storage RedrockVirden
GilaRedrock Calc
GilaVirden Calc
Irrigated Land RedrockVirden
Irrigated Land GilaRedrock
GilaGila
Storage VirdenClifton
GilaClifton Calc
Storage CliftonSolomon
GilaSolomon Calc
Storage GlenwoodClifton
Storage ReserveGlenwood
SFReserve
SFGlenwood Calc
SFClifton Calc
Irrigated Land ReserveGlenwood
Routed Flow Virden
Routed Flow Clifton
Routed Flow GilaSolomon
Routed FlowSFConfluence
initialize ReachStorage
ReturnConveyanceGilaRedrock
GW RedrockVirden
ReturnConveyanceRedrockVirden
Agri DiversionRedrockVirden
Ditch DiversionVirdenClifton
Ditch DiversionGilaCliftonSolomon
SeepageRageRedrockVirden
initial irrigationstorage
Irrigated Land VirdenClifton
initial irrigationstorage
C&I Sorage VirdenNMState
C&I Stock ReserveGlenwood
ReturnReserveGlenwood
Irrigated Land GlenwoodClifton
SeepageRateNMStateSFClifton
C&I Stock NMStateSFClifton
ReturnNMStateSFClifton
Irrigated Land CliftonSolomon
ReturnConveyanceGilaCliftonSolomon
Return GilaRedrock
ReturnConveyanceReserveGlenwood
ReturnconveyanceNMStateSFClifton
initialize ReachStorage
initialize ReachStorage
initialize ReachStorage
initialize ReachStorage
SeepageRateGilaRedrock
SeepageRateReserveGlenwood
initial irrigationstorage
C&I Stock GlenwoodNMState
ReturnGlenwoodNMState
Civil & Industrial stock GilaRedrock
Initial C&I storage
DitchSeepageGilaRedrock
DitchOpenH2OEvapGilaRedrock
AgriCU GilaRedrock
RiverLeakageGilaRedrock
TotC&C SWDemandGilaRedrock
TotLivestockSWDemandGilaRedrock
OpenH2OEvapGilaRedrock
Total SWWDGilaRedrock
SW WithdrawalGilaRedrock
DitchDiversionGilaRedrock
RiverLeakageRedrockVirden
DitchOpenH2OEvapRedrockVirden
DitchSeepageRedrockVirden
Total SWWDRedrockVirden
TotC&C SWDemandRedrockVirden
TotMining SWDemand
RedrockVirden
TotLivestockSWDemand
RedrockVirden
AgriCURedrockVirden
SW WithdrawalRedrockVirden
OpenH2OEvapRedrockVirden
ReturnRedrockVirden
AgriCU VirdenClifton
Initial C&I storage
SeepageRateVirdenClifton
SW WithdrawalGilaCliftonSolomon
ReturnVirdenNMState
ReturnGilaCliftonSolomon
DitchOpenH2OEvapVirdenClifton
Total SWWDVirdenNMState
TotC&C SWDemandVirdenNMState
TotMiningSWDemand
VirdenNMState
TotLivestockSWDemand
VirdenNMState
RiverLeakageVirdenClifton
ReturnConveyanceVirdenClifton
SW WithdrawalVirdenNMState
C&I Storage GilaCliftonSolomon
AgriCUGilaCliftonSolomon
TotC&C SWDemandGilaCliftonSolomon
TotMiningSWDemand
GilaCliftonSolomon
TotLivestockSWDemand
GilaCliftonSolomon
OpenH2OEvapGilaCliftonSolomon
RiverLeakageGilaCliftonSolomon
Total SWWDGilaCliftonSolomon
AgriCUReserveGlenwood
Total SWWDReserveGlenwood
TotC&C SWDemandReserveGlenwood
TotMiningSWDemand
ReserveGlenwood
TotLivestockSWDemand
ReserveGlenwood
DitchOpenH2OEvapReserveGlenwood DitchSeepage
ReserveGlenwood
OpenH2OEvapReserveGlenwood
RiverLeakageReserveGlenwood
Ditch DiversionReserveGlenwood
SW WithdrawalReserveGlenwood
Initial C&I storage
initial irrigationstorage
SW WithdrawalGlenwoodClifton
Ditch DiversionNMStateSFClifton
SW WithdrawalGlanewoodNMState
DitchOpenH2OEvapGilaCliftonSolomon
Storage UpperGila
Irrigated Land UpperGila
Civil & Industrial Stock UpperGila
Ditch DiversionUpperGila
ReturnConveyanceUpperGila
Seepage RateUpperGila
SW WithdrawalUpperGila
DitchOpenH2OEvapUpperGila
DitchSeepageUpperGila
AgriCU UpperGila
initialize ReachStorage
Initial C&I storage
Total SWWDUpperGila
TotMining SWDemand UpperGila
TotC&C SWDemUpperGilak
TotLivestockSWDemandUpperGila
Return UpperGila
TributaryGilaRedrock
Bill Evans Lake
BillEvans Lake SWWithdrawal
BillEvans OpenH2OEvaporation
Mogollon flow intoGila
Blue into SanFrancisco Clifton
Tributary SFClifton
Storage UpperSF
Ditch DiversionUpper SF
SeepageRateUpperSF
Irrigated Land UpperSF
C&IStorage UpperSF
ReturnConveyanceUpperSF
Return UpperSF
initialize ReachStorage
SW WithdrawalUpperSF
initial irrigationstorage
C&I Sorage NMStateClifton
ReturnNMStateClifton
SW WithdrawalNMStateClifton
AgriCU UpperSF
DitchSeepageUpperSF
DitchOpenH2OEvapUpperSF
RiverLeakageUpperSF
TotC&C DemandUpperSF
TotMiningSWDemandUpperSF
TotLivestockSWDemandUpperSF
Total SWWDUpperSF
OpenH2OEvapUpperSF
Initial C&I storage
Total SWWDNMStateClifton
TotC&C SWDemandNMStateClifton
TotMiningSWDemand
NMStateClifton
Total SWWDGlenwoodNMState
TotC&C SWDemandGlenwoodNMState
TotMiningSWDemand
GlenwoodNMState
TotLivestockSWDemand
GlenwoodNMState
AgriCUNMStateSFClifton
DitchOpenH2OEvapNMStateSFClifton
DitchSeepageNMStateSFClifton
Total SWWDNMStateSFClifton
TotC&C SWDemandNMStateSFClifton
TotMiningSWDemand
NMStateSFClifton
TotLivestockSWDemand
NMStateSFClifton
TotLivestockSWDemand
NMStateClifton
initial irrigationstorage
TularosaAragon
HistoricalGilaRedrock Ditch
Flow
Actual DitchFlowGilaRedrock
Ditch CalculationMethod
OpenH2O EvapGlenwoodSFClifton
OpenH2OEvapVirdenClifton
RiverLeakageGlenwoodSFClifton
DitchSeepageVirdenClifton
Storage SFClifton to confluence
Initial SFClifton toconfluence
BillEvans SW WDGilaredrock
GilaheadwaterInput
Routed FlowRedrock
Routed FlowSFClifton
Routed FlowGlenwood
SFHeadwater Inputfrom Luna Lake
subsurfacerecharge
GilaRedrock
Model Ditch FlowGilaRedrock
Model Ditch FlowRedrockVirden
Model Ditch FlowReserveGlenwood
Model Ditch FlowUpper SF
Model Ditch FlowUpperGila
Model Ditch FlowVirdenClifton
future OpenEvap
DataEnd
BillEvansOpenWaterEvap
Livestock SWdemand GilaRedrock
Livestock SWdemand
RedrockVirden
Livestock SWdemand UpperGila
Livestock SWdemand
VirdenClifton
Livestock SWdemand
GlenwoodSFClifton
Livestock SWdemand
ReserveGlenwood
Livestock SWdemand UpperSF
DitchFlowGilaRedrocknowinter
DitchFlowRedrockVirden
nowinter
DitchFlowReserveGlenwood
nowinter
GilaRedrock
63.77 cfs
0.00 cfs
632.00 cfs
0.00 cfs
0.00 cfs
-11.96 cfs
0.00 cfs
0.00 cfs
0.00 cfs
0.00 cfs
91.00 AF
0.00 AF/da
0.00 cfs
0.00 cfs
317.74 cfs
402.00 AF
86.00 AF
7.60 cfs
33.41 cfs
0.00 cfs
256.00 AF
0.00 cfs
233.63 cfs
56.25 cfs
2.52 cfs
0.00 AF/da
0.00 cfs0.00 cfs
3.62 cfs0.33 cfs
-23.55 cfs
0.00 cfs
0.00 cfs
0.00 cfs
186.00 AF
0.00 cfs
0.97 cfs
0.08 cfs
0.00 cfs
140.92 cfs
0.00 AF/da
342.00 AF
180.00 AF-21.26 cfs
0.35 cfs
0.00 cfs
0.00 cfs
0.00 cfs
0.00 cfs
0.00 cfs
140.92 cfs
51.52 cfs
56.25 cfs
2.52 cfs
0.00 cfs
0.00 cfs
0.00 cfs
0.00 cfs
200.00 AF
33.41 cfs
0.72 cfs
0.00 cfs
0.00 AF/da
6.07 cfs
0.84 cfs
317.74 cfs
0.00 cfs
0.00 AF
50.00 AF
0.00 cfs
0.00 AF/da
0.04 cfs
0.24 cfs
0.20 cfs
0.04 cfs
1,270.00 cfs
ft³
R UpperGila
R GilaRedrock
R RedrockVirde
5
6
1910 2006
•Historical non-Ag GW use.•Irrigated land (crop survey.)•Franks Well Field.•PD Diversion monthly records.•Population, city & county
•River Flow•Ditch Flow•Temperature•Livestock•Well distribution, H2O rights•Gila Water Commissioner
•SW Planning Report (5-yr intervals)
•Tributaries – Duck creek Peak Flow-Mangas creek Peak Flow-Blue River-Tularosa River, etc.
19811968
1979
20051936
20051999
Available Historical Data
1936
20001975
2006
19812005
1985 2004
Calibration window
USGS, OSE reports, WATERS, GIS, NMDAg
19571988 2003
2004
1936
present
present
Ditch-River correlationGila nr Gila + Mogollon Creek vs Upper Gila Ditch
0
5
10
15
20
25
30
35
40
0 50 100 150 200
GG + MC
Upp
er G
ila D
itc
199920002002200320042005Correlation
Gila-Redrock Ditch and River flows
0
20
40
60
80
100
120
140
160
180
200
9/6/
1999
12/6
/199
9
3/6/
2000
6/6/
2000
9/6/
2000
12/6
/200
0
3/6/
2001
6/6/
2001
9/6/
2001
12/6
/200
1
3/6/
2002
6/6/
2002
9/6/
2002
12/6
/200
2
3/6/
2003
6/6/
2003
9/6/
2003
12/6
/200
3
3/6/
2004
6/6/
2004
9/6/
2004
12/6
/200
4
3/6/
2005
6/6/
2005
9/6/
2005
12/6
/200
5
3/6/
2006
Time
cfs
GilaGila Gauge Flow, USGS
Total of UG,FtWest,GFarm,&GHarper fromOSEModel-2 based on correlation only
Model Calibration
• Dynamics between fluvial and regional aquifers not all captured.
• Tributary contributions from summer monsoon events and snowmelt are missed
Calculated vs. Measured Gila Virden Gage
01 02 03 04 050
100
200
300
400
500cfs
Calculated vs. Measured Gila-Redrock Gauge
01 02 03 04 050
100
200
300
400
500cfs
• Upstream peaks may be attentuated downstream.
RED=CalculatedBlack=Measured
User ControlClimate
CUFA
PopulationAgriculture
MinimumRiverFlows
MineLeased
Water Rights
Pausethe
Model
ExecutiveSummary
Climate Options and Controls
Return to Top
Future Temperature Data
Repeat Historical Temperature Data
Use Average Temperature
Use 40 Year URGWOPS sequence
Increase/Decrease Hydrograph by Percent
-100 -80 -60 -40 -20 0 20 40 60 80 100%
Add or Subtract CFS on Hydrograph
-50 -40 -30 -20 -10 0 10 20 30 40 50cfs
Future River Flow Data
Repeat Historical Hydrograph Data
Use Average Annual Hydrograph
Use 40 Year URGWOPS Sequence
Temperature and River Data Categories are related.Choose of the three options in one category willautomatically set the option in the other category.
The historical hydrograph and temperature data ateach gauge vary bewteen 1979 and 2005.
The average hydrograph is derived from all the databetween 1955 and 2005.
URGWOP stands for Upper Rio Grande WaterOperations and Planning Study. In that studyhistorical data was re-ordered by year to create adrought sequence, a short wet sequence, and a longwet sequence. Comparison of Rio Grande data withthat of the Gila-San Francisco Basins suggests acorrelation such that wet years along the Rio Grandetend to be wet in southwest New Mexico too. It issimilar with dry years. Here we order the Gila-SanFrancisco hydrographs to follow the URGWOPSpattern. It may allow for some comparison betweenmodels in the future. If the starting year is 2006,then drought happens 2009-2018 and wet years are2019-2023 and 2026-2037.
If the minimum flowcontrol is set atCONSTANT, there isno differentiationamongst diversionlocations.
i
Tables
Gila GW Avg Annual Rate Total Volume
Domestic Wells 20 AF/year 413 AF
DNC Wells 1,818 AF/year 35,483 AF
Municipality 657 AF/year 14,241 AF
GW to Mimbres 951 AF/year 17,865 AF
Commercial 2,183 AF/year 45,880 AF
Livestock 3,206 AF/year 67,283 AF
Mining 392 AF/year 8,367 AF
Supplemental Ag 4,692 AF/year 81,525 AF
Mimbres GW Avg Annual Rate Total Volume
Mimbres Irrigation 24,048 AF/year 559,504 AF
Mimbres Population 13,929 AF/year 258,596 AF
Mimbres Industrial 15,254 AF/year 320,316 AF
Mimbres Livestock 1,416 AF/year 29,752 AF
TestsTests - or
1 2 3 4 5 6 7 8 9 10 11 12
ON
1 1 2026 Days: 7,671
OFF
Test Test # False % True
Test 1 San Carlos >= 30K AF 766 90 %
Test 2 Sum of Flows > DDB 4,410 43 %
Test 3 GilaVirden > 120% Call for DV 335 96 %
Test 4 Sum of Diversions < DD Right 0 100 %
Test 5 Allowable Diversion < 350 cfs 860 89 %
Test 6 SF Clifton >= SF Minimum Flow 5,100 34 %
Test 7 SumSF gauges>120%(3 or 30cfs) 491 94 %
Test 8 CU < 140K in 10 yr 0 100 %
Test 9 San Francisco CU < 4K in 1 yr 0 100 %
Test 10 CU < 64K in 1 yr 0 100 %
Test 11 Bank is > 0 2,645 66 %
Test 12 Gila Gila >= Gila Minimum Flow 5,242 32 %
Avg Annual Rate Total Volume
SF Acreage 857 acre
SF Ag CU 1,471 AF/year 31,165 AF
SF Ag Seepage 454 AF/year 9,620 AF
SF Ag Open Evap 30 AF/year 643 AF
SF Diversion Rights 2,315 AF/year 48,614 AF
Information Sharing
• Data, presentations and meeting notes are shared at:
• https://waterportal.sandia.gov/nmstateengineer
http://www.sandia.gov/gilasanfrancisco/index.html
Questions?
Model Homepage
Gila-San Francisco Decision Support Tool
GSFDecisionSupportTool
ClimateExecutiveSummary
CUFA Population
MinimumRiverFlows
MineLeased
Water RightsAgriculture
Version:D R A F T
20071016iBackgroundAbout this
Model
Pausethe
Model
Maps
The Gila San Francisco Decision Support Tool is a draft model that can not be used, disseminated, and applied without theconsent of the Gila San Francisco Collaborative Modeling Team. It is a research tool that is intended for educatingstakeholders, the interested public, and the modeling team. If you have any questions regarding the use of this tool,please contact Vince Tidwell, [email protected]
Return to Top
Version:D R A F T
20071016i
Water Rights Leased to Irrigators
0 1,0
00
2,0
00
3,0
00
4,0
00
5,0
00
6,0
00
7,0
00
8,0
00
9,0
00
10,0
00
11,0
00
12,0
00
13,0
00
14,0
00
AF/year
Phelps Dodge Mining
Specify the annualamount of water leased
back from PD toirrigators in Gila-
Redrock reach. Watertransferred to exisiting
acreage is a groundwater right.
Water Rights Leased to the Municipality of Silver City
0 1,0
00
2,0
00
3,0
00
4,0
00
5,0
00
6,0
00
7,0
00
8,0
00
9,0
00
10,0
00
11,0
00
12,0
00
13,0
00
14,0
00
15,0
00
16,0
00
17,0
00
18,0
00
19,0
00
20,0
00
21,0
00
22,0
00
23,0
00
24,0
00
25,0
00
26,0
00
27,0
00
28,0
00
29,0
00
30,0
00
31,0
00
AF/year
Water to Agriculture
Water to Municipal
Specify the annualamount of water leasedto Silver City from PD.
Water Usage Choice
Increase Acreage
Apply to Existing Acreage
The volume of water in the combined Gila-Mimbres River Basins owned by mining is 42,539 AF (maximum 44,572 AF)per year. The table in the information provides the exact split between Gila and Mimbres basin. Changes in the leasedvalues take effect on October 1 of any given year.
4,566.64 AF
Silver City Water Rights
0 AF/year
0 AF/year
GSFDecisionSupportTool
Controls
GSFDecisionSupportTool
Return to top
Set Minimum Flows
The CUFA model will calculate the allowable diversionusing either the streamflow values recorded by the USGSfor the historical period in question or values caluculatedby the River Routing portion of this model for some of thestreamflow sites.The sites that are calculated are: 09432000 Gila River below Blue Creek, near Virden 09444500 San Francisco River at Clifton 09448500 Gila River at head of Safford Valley
Based on historical data of the Duncan-Virden call from '99 to October'06, an average monthly call volume was computed and used in settingthe CUFA constraint.
By default, the model will draw a maximumamount of Gila and SF water allowed under CUFAterms and ESA flows
Divert Gila?
Yes
No
Divert SF?
Yes
No
Combined Yearly Max
64,000 AF/year
54,000 AF
i
Choose USGS or Modeled FlowsDuncan-Virden Valley Call
When Ag demand switch is ON, theminimum flow accounts for thecompounding effects of agriculturaldiversions that in the GSF region. Thisis added to the model automaticallywhen accounting for minimum flow.
i Ag Demand isCurrently
OFFON
The NM CAP WaterBank starts with 54,000 AF as a default.This value can beadjusted.
multiplier-winter
0.5 0.6 0.7 0.8 0.9 1.0
multiplier-summer
0.5 0.6 0.7 0.8 0.9 1.0
0.80
0.75
Multipliers for CalculatingNMExcess under CUFAterms. Summer refers toperiods between May andSeptember.
0
1000
2000
3000
4000
5000
6000
1979
1981
1983
1985
1987
1989
1991
1993
1995
1997
1999
2001
2003
2005
year
acre
s Land w/ RightsIrrigated AcreageDecree
0
50
100
150
200
250
300
1979
1981
1983
1985
1987
1989
1991
1993
1995
1997
1999
2001
2003
2005
Irrigated AcreageLand w/ RightsDecree
Upper GilaGilaRedrock
0
200
400
600
800
1000
1200
1400
1600
1979
1981
1983
1985
1987
1989
1991
1993
1995
1997
1999
2001
2003
2005
year
acre
s Land w/ RightsIrrigated LandDecree
RedrockVirdenNM Virden Valley
0
500
1000
1500
2000
2500
3000
3500
1979
1981
1983
1985
1987
1989
1991
1993
1995
1997
1999
2001
2003
2005
year
Acr
es
Irrigated Land= Land w/Rights
Decree
Historical Ag. Use from Hydrographic Survey - Gila