flows for the future 2005 environmental flows conference texas state university – san marcos
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FLOWS FOR THE FUTURE 2005 Environmental Flows Conference Texas State University – San Marcos November 1, 2005 Bob Brandes Region M Water Planning Study. Rio Grande Planning Region. Region M Counties and River Basins. Region M Projected Population. Region M Environmental Flow Issues. - PowerPoint PPT PresentationTRANSCRIPT
FLOWS FOR THE FUTUREFLOWS FOR THE FUTURE
2005 Environmental Flows Conference2005 Environmental Flows Conference
Texas State University – San MarcosTexas State University – San MarcosNovember 1, 2005November 1, 2005
Bob BrandesBob Brandes
Region M Water Planning StudyRegion M Water Planning Study
Rio Grande Rio Grande Planning Planning RegionRegion
Region M Counties and River BasinsRegion M Counties and River Basins
10 0 10 Miles
N
Nueces
Nueces-Rio Grande
Rio Grande
NuecesBasin
Rio GrandeBasin
Nueces-Rio GrandeBasin
MAVERICKCOUNTY
WEBBCOUNTY
ZAPATACOUNTY JIM HOGG
COUNTY
STARRCOUNTY
HIDALGOCOUNTY
WILLACYCOUNTY
CAMERONCOUNTY
Figure 3.2 - Rio Grande Water Planning RegionShowing Basin Areas
Region M Projected PopulationRegion M Projected Population
0500,000
1,000,0001,500,0002,000,0002,500,0003,000,0003,500,0004,000,000
Po
pu
lati
on
D2000 D2020 D2040 D2060
Decade
Region MRegion MEnvironmental Flow IssuesEnvironmental Flow Issues
• Rio Grande Flows Are Highly Regulated Rio Grande Flows Are Highly Regulated andand Subject to Mexico’s OperationsSubject to Mexico’s Operations
• Rio Grande Basin Is Already Over-Rio Grande Basin Is Already Over-AppropriatedAppropriated
• Projected Demands Are Changing and Projected Demands Are Changing and Substantial Relative To Existing SuppliesSubstantial Relative To Existing Supplies
• Strategies Reflect Primarily Utilization of Strategies Reflect Primarily Utilization of Existing Surface Water Resources; No Existing Surface Water Resources; No Major Surface Water DevelopmentMajor Surface Water Development
Amistad Reservoir
Falcon Reservoir
Anzalduas Reservoir
Elephant Butte Reservoir
MajorMajorRio GrandeRio GrandeMainstemMainstemReservoirsReservoirs
Total Storage Capacity: ~ 8,000,000 Acre-Feet
Caballo Reservoir
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Below E
lepha
nt B
utte
Dam
El Pas
o
Below A
meric
an D
am
Fort Q
uitm
an
Above R
io C
oncho
s
Below R
io C
oncho
s
Foster R
anch
Below A
mist
ad D
am
Del Rio
Eagle
Pas
s
Laredo
Below F
alcon
Dam
Rio G
rand
e City
Below A
nzald
uas
Dam
San B
enito
Browns
ville
AN
NU
AL
AV
ER
AG
E F
LO
WM
ILLI
ON
AC
RE
-FE
ET
1968-1998 Rio Grande Mean Annual Flows1968-1998 Rio Grande Mean Annual Flows
MexicanMexicanTreatyTreaty
TributaryTributaryReservoirsReservoirs
Total Storage Capacity: ~ 4,000,000 Acre-Feet
Rio San Juan Reservoir Capacity: ~
1,700,000 Acre-feet
Region MRegion MEnvironmental Flow IssuesEnvironmental Flow Issues
• Rio Grande Flows Are Highly Regulated Rio Grande Flows Are Highly Regulated andand Subject to Mexico’s OperationsSubject to Mexico’s Operations
• Rio Grande Basin Is Already Over-Rio Grande Basin Is Already Over-AppropriatedAppropriated
• Projected Demands Are Changing and Projected Demands Are Changing and Substantial Relative To Existing SuppliesSubstantial Relative To Existing Supplies
• Strategies Reflect Primarily Utilization of Strategies Reflect Primarily Utilization of Existing Surface Water Resources; No Existing Surface Water Resources; No Major Surface Water DevelopmentMajor Surface Water Development
Region M Existing Water RightsRegion M Existing Water Rights
336,642
54,819
1,853,179
2,6940
200,000
400,000
600,000
800,000
1,000,000
1,200,000
1,400,000
1,600,000
1,800,000
2,000,000
Div
ersi
on
Am
ou
nt
(Ac-
Ft/
Yea
r)
MUNICIPAL INDUSTRIAL IRRIGATION MINING
Total Authorized Water Rights: 2,247,334 Ac-Ft/Yr
YearYear United StatesUnited States MexicoMexico TotalTotal
20002000 1,087,4491,087,449 901,700901,700 1,989,1491,989,149
20102010 1,067,3101,067,310 888,200888,200 1,955,5101,955,510
20202020 1,056,7191,056,719 879,700879,700 1,936,4191,936,419
20302030 1,048,9651,048,965 869,200869,200 1,918,1651,918,165
20402040 1,041,6271,041,627 858,700858,700 1,900,3271,900,327
20502050 1,034,5921,034,592 846,700846,700 1,881,2921,881,292
20602060 1,024,9871,024,987 835,700835,700 1,860,6871,860,687
Projected Firm Annual YieldProjected Firm Annual YieldAmistad-Falcon Reservoir SystemAmistad-Falcon Reservoir System
Region MRegion MEnvironmental Flow IssuesEnvironmental Flow Issues
• Rio Grande Basin Is Already Over-Rio Grande Basin Is Already Over-AppropriatedAppropriated
• Rio Grande Flows Are Highly Regulated Rio Grande Flows Are Highly Regulated and Subject to Mexico’s Operationsand Subject to Mexico’s Operations
• Projected Demands Are Changing and Projected Demands Are Changing and Substantial Relative To Existing SuppliesSubstantial Relative To Existing Supplies
• Strategies Reflect Primarily Utilization of Strategies Reflect Primarily Utilization of Existing Surface Water Resources; No Existing Surface Water Resources; No Major Surface Water DevelopmentMajor Surface Water Development
D2060 Demands
MUNICIPAL37.7%
STEAM ELECTRIC2.0%
MINING0.3%
LIVESTOCK0.4%
MANUFACTURING0.7%
IRRIGATION59.1%
Region M Water DemandsRegion M Water Demands
D2000 Demands IRRIGATION82.9%
MANUFACTURING0.4%
MUNICIPAL15.5%
STEAM ELECTRIC0.5%
MINING0.3%
LIVESTOCK0.4%
Municipal Supply vs Demand Municipal Supply vs Demand (acre-feet/year)(acre-feet/year)
Irrigation Supply vs Demand Irrigation Supply vs Demand (acre-feet/year)(acre-feet/year)
Historical Irrigation Demands Historical Irrigation Demands
Figure 3.23 Total Historical Irrigation and Mining Water UseFrom Amistad and Falcon Reservoirs
0
200,000
400,000
600,000
800,000
1,000,000
1,200,000
1,400,000
1,600,000
1,800,000
1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004
Acr
e-F
eet
Source: Rio Grande Watermaster
Total Irrigation Water Use Varies According To Total Irrigation Water Use Varies According To Available Amistad-Falcon Supply and ClimateAvailable Amistad-Falcon Supply and Climate
Region MRegion MEnvironmental Flow IssuesEnvironmental Flow Issues
• Rio Grande Basin Is Already Over-Rio Grande Basin Is Already Over-AppropriatedAppropriated
• Rio Grande Flows Are Highly Regulated Rio Grande Flows Are Highly Regulated andand Subject to Mexico’s OperationsSubject to Mexico’s Operations
• Projected Demands Are Changing and Projected Demands Are Changing and Substantial Relative To Existing SuppliesSubstantial Relative To Existing Supplies
• Strategies Reflect Primarily Utilization of Strategies Reflect Primarily Utilization of Existing Surface Water Resources; No Existing Surface Water Resources; No Major Surface Water DevelopmentMajor Surface Water Development
Projected Water SuppliesProjected Water SuppliesFrom Recommended StrategiesFrom Recommended Strategies
Acquisition/Conversion of Water RightsAcquisition/Conversion of Water Rights 136,171136,171
Brackish Groundwater DesalinationBrackish Groundwater Desalination 62,339 62,339
Gulf Coast Aquifer DevelopmentGulf Coast Aquifer Development 49,204 49,204
Advanced Water ConservationAdvanced Water Conservation 43,766 43,766
Non-Potable Water ReuseNon-Potable Water Reuse 38,532 38,532
Brownsville Weir and ReservoirBrownsville Weir and Reservoir 20,643 20,643
Potable Water ReusePotable Water Reuse 1,120 1,120
Seawater DesalinationSeawater Desalination 889 889
Total Additional SupplyTotal Additional Supply 352,664 352,664
Strategies With PotentialStrategies With PotentialDirect River Flow ImpactsDirect River Flow Impacts
• Acquisition/Conversion of Existing Water Acquisition/Conversion of Existing Water RightsRights• Urbanization of Irrigated FarmlandUrbanization of Irrigated Farmland• Purchase of Existing Unused Water RightsPurchase of Existing Unused Water Rights• Contract for Municipal Water from Irrigation Contract for Municipal Water from Irrigation
DistrictDistrict
• Brownsville Weir and ReservoirBrownsville Weir and Reservoir• Water Right Permit Issued By StateWater Right Permit Issued By State• Includes Environmental Flow ProvisionsIncludes Environmental Flow Provisions
FLOWS FOR THE FUTUREFLOWS FOR THE FUTURE
2005 Environmental Flows Conference2005 Environmental Flows Conference
Texas State University – San MarcosTexas State University – San MarcosNovember 1, 2005November 1, 2005
Bob BrandesBob Brandes
Region M Water Planning StudyRegion M Water Planning Study