osvel hinojosa-huerta pronatura noroeste
TRANSCRIPT
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Restoration Efforts in the
Colorado River Delta
Osvel Hinojosa-Huerta
Pronatura Noroeste
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Oficinas de Pronatura
Estaciones de Campo de Pronatura
Sistema Nacional Pronatura Mexico
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Colorado River
•>2,500 km from the Rocky Mountains to the Gulf of California
• Annual flow: 19,800 Mm3
• Allocated water rights: 23,125 Mm3
• Allocation to Mexico: 1,875 Mm3
• Over allocation of 16%
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Colorado River
One of the most regulated rivers in the world: • 10 major dams (4 times the annual flow) • 80 major diversions • 1.6 million ha of agriculture
• 30 million people: Denver, Los Angeles, San Diego, Las Vegas, Phoenix, Tijuana, Mexicali
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N
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Colorado River Delta 400,000 Ha 19,000 Mm3 of water per year to the Gulf of California River influence extended 65 km into the sea Extensive estuarine area (500,000 Ha)
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Changes in the Colorado River Delta
• Dams and Water Diversions: Reduction of river flows • Agricultural expansion
• Loss of 80% of wetland area
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1905 1910 1915 1920 1925 1930 1935 1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000
Year
Mill
ion
acre
feet
Presa Glen Canyon Presa Hoover
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1984 1994
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300,000 wintering shorebirds 40,000 – 60,000 ducks and geese
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Restoration in the Colorado River Delta
• Research, planning and identification of needs for the environment • Public policy and outreach • Implementation of tools
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Seccion tipo del Rio Colorado
Seccion (m)
Ele
vaci
on (m
)
Legend
WS PF 1
Ground
Bank Sta
.11 .085 .11
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Avian Monitoring Program in the Colorado River Delta
• Evaluate population trends: measurement of ecosystem health
• Identify impacts and threats
• Evaluate management actions
• Guide conservation and restoration initiatives
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Avian Monitoring Program in the Colorado River Delta
• Monitoring of Riparian Birds
• Marshbird Monitoring • Shorebird counts (ground and aerial) in the delta and Upper Gulf of California • Migration monitoring for landbirds in Spring: Mist-netting
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Study Area Riparian Corridor of the Colorado in Mexico 12,700 Ha 70 river km
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Drought in the Basin Since 2002
April 3, 1999 August 30,
2004
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1998 1999 2000 2001 2002 2003 2004 2005 2006 2007
Year
Flow
m3/
s
3,000 Million m3 in 1998 60 Million m3 in 2002 0 m3 in 2006 and 2007
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1998 1999 2000 2001 2002 2003 2004 2005 2006 2007
Year
Flow
m3/
s
Great pulse flood
Good base flow Bad base flow
Riparian corridor needs a continuous base flow of 2 m3/s and a pulse flood of 30 m3/s every 4 years (3 month duration)
Needed a pulse flood
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0
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0.25
0.3
0.35
0.4
0.45
0.5
1/15/2000 1/14/2001 1/14/2002 1/14/2003 1/14/2004 1/13/2005 1/13/2006 1/13/2007
NDVI
NDVI decreased 29% r2 = 0.65, p < 0.0001
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-1
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COTT2002
COTT2007
WILL2002
WILL2007
HOME2002
HOME2007
SCME2002
SCME2007
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SALT 2002 SALT 2007
+17%
-42%
-76%
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Changes in Colorado River Mexico, 2002-2007 In Summary
Drought: drastic reduction of flows
Reduction in riparian habitat quality
Population decline of
riparian-related birds
Population increase of
agricultural-related birds
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Changes in Colorado River
Mexico
But, some resiliency despite absence of surface flows Still remnant populations of riparian birds Agricultural run-off and sub-surface flows
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Changes in Colorado River Mexico, 2002-2007 What next?
Low reservoir conditions and climate change: drought might continue and deteriorate river conditions Risk for riparian birds in the Colorado River in Mexico We are working to revert the trends, through riparian restoration and allocation of instream flows
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Restoration and Conservation Potential
Map of the possible Restoration Goals Blueprint for actions
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2 - 4 m3/s 30 - 40 m3/s – 3 meses, 4 años < 2 ppm
4 m3/s < 3 ppm
1.2 - 2 m3/s < 3.5 ppm
40 - 70 m3/s, 4 meses < 4 ppm
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Initiative for the Restoration of the Colorado River Delta
Improve and maintain environmental conditions at priority sites • Biodiversity • Community livelihoods • Water use efficiency
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Key strategies
• Outreach and community involvement
• Binational negotiations
• Water for the environment • Protection of key sites
• Restoration
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Public Policy and Binational Negotiations
• Creation of the Biosphere Reserve and Ramsar Sites
• Minute 306 of the International Water Treaty: binational collaboration for the restoration of the delta.
• Integration of the Binational Colorado River Cooperative Process within the framework of CILA/IBWC
• Environment • Participation of multiple stakeholders
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• The river is over-allocated • We need new strategies and tools
Implementation
Water Allocation
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Water Allocation:
• Voluntary, market-based strategies
• Acquisition of water rights in the Mexicali Valley
• Water Trust for the Restoration of the Colorado River Delta
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Water Allocation
• 1 ha of water rights = 10,000 m3/year (8.11 AFY)
• Permanent allocation
• Contract for transfer of water right
• Register in the Public Registry of Water Rights
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Report on Water Acquisitions
• A total of 4.5 Million m3 per year
• Goal for 2012: Reach 25 Million m3 per year
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Las Arenitas Wastewater Treatment Plant 30% of the effluent guaranteed for instream flows in the Hardy River (700 l/s or 22 Mm3 per year) Duplicates the flow in the river
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Conservation Easements and
Concessions
1,400 Ha El Doctor Ejido Johnson
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Restoration in the Limitrophe Section
Binational Effort – Local Roots Recovery of the Colorado River Benefits for the community: • Recovery of natural spaces • Sustainable rural development • Improve safety in border communities
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Cienega de Santa Clara: largest wetland in the Delta 40,000 acres 90% of its water is agricultural drainage from the Welton and Mohawk valleys in Arizona MODE Canal This same water has being targeted to be used by the Yuma Desalting Plant in Arizona
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Image date 10/3/1973
Scene time 10:43
High Tide 12:42MST +0.50 m
Time Difference +2:01
1973
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Image date 10/1/1977
Scene time 10:06
High Tide 15:28 MST +1.46 m
Time Difference +5:22
1977
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Image date 8/23/1981
Scene time 10:29
High Tide 10:34 MST 1.34 m
Time Difference +00:05
1981
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Image date 10/2/1985
Scene time 17:39
High Tide 15:04 MST +1.89m
Time Difference -2:35
1985
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Image date 9/30/1990
Scene time 10:30
High Tide 12:20 MST+2.64m
Time Difference +1:50
1990
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Image date 9/9/1994
Scene time 10:27
High Tide 16:09 +1.99 m
Time Difference +5:42
1994
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Image date 9/25/2000
Scene time 10:48
High Tide 13:12 + 3.59m
Time Difference +2:24
2000
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Image date 9/20/2004
Scene time 10:54
High Tide 16:19 +0.55 m
Time Difference +5:25
2004
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Image date 9/29/2007
Scene time 11:03
High Tide 15:22 +2.31 m
Time Difference +4:19
2007
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Image date 9/13/2008
Scene time 10:55
High Tide 13:28 +3.30 m
Time Difference +2:33
2008
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Image date 01/01/2010
Scene time
High Tide
Time Difference
2010
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Trial run of the YDP (May 2010-March 2011), with participation of Arizona, Nevada, California and USBOR, 30% capacity Historic agreement between Mexico, the U.S. and environmental groups to protect the Cienega First time in which both countries dedicate water for the environment in the delta, and the first time that environmental groups are part of the Treaty Comprehensive binational monitoring program
Ciénega de Santa Clara and Yuma Desalting Plant
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Binational Monitoring Program for the Ciénega de Santa Clara
UABC
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7.2 M El Mayor–Cucapah Earthquake, 3:40 PM, April 4, 2010
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2010-3-29
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2010-4-30
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Inflows to the Ciénega de Santa Clara
0
1
2
3
4
5
6
7
8
9
10/1
/200
9
11/1
/200
9
12/1
/200
9
1/1/
2010
2/1/
2010
3/1/
2010
4/1/
2010
5/1/
2010
6/1/
2010
7/1/
2010
8/1/
2010
9/1/
2010
10/1
/201
0
11/1
/201
0
Flow
(m3/
s)
MODE Repairs
YDP operations start
Average inflow to the
Cienega
Replacement Water
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2010-4-30
Before the YDP trial run
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2010-5-16
YDP operations begin
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2010-6-17
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2010-7-19
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2010-8-20
Effect of 30% flow reduction
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2010-9-21
Replacement water arriving
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2010-10-07
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March 24, 2011. Images by Salvador Chavez, Pronatura
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2011-3-16 TM Bands 1,4,5
S. Nelson 2011-4-17
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2011-4-01 TM Bands 1,4,5
S. Nelson 2011-4-17
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2011-4-17 TM Bands 1,4,5
S. Nelson 2011-4-17
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April 13, 2011, three weeks after fire
Image by F. Zamora, Sonoran Institute
Abril 13, 2011, tres semanas después del incendio
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25 Transects 125 survey points
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0.00
1.00
2.00
3.00
4.00
5.00
6.00
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
54.99% reduction from 1999-2002 (95% C.I. 33.53 – 76.45; P < 0.001, β = 0.99) 30% reduction
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Learning Process in the Cienega: Binational cooperation is possible and essential Resilient ecosystem within the level of impacts that have occurred Disturbance (fire, shift and variation in flows) enhance the dynamism in the marsh and results in increased numbers of marshbirds
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Restoration in the Colorado River Delta:
• We have a regulatory framework, public policies and the support from different stakeholders
• Binational cooperation • Water allocation is feasible
• The protection of large areas of wetlands and floodplain is feasible
• Resilient ecosystem: restoration is possible
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[email protected] www.pronatura-noroeste.org www.alexandracousteau.org www.sonoraninstitute.org Facebook: Protect the Flows Save the Colorado Save the Colorado River Delta