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Roosevelt Dam and Lake, AZ. Reservoir Operations and Water Supply Planning at Salt River Project. Jon Skindlov meteorologist /climatologist Water Resource Operations Salt River Project, Phoenix, AZ. DOI project workshop 28 March 2014 University of Arizona, Tucson, AZ. - PowerPoint PPT Presentation
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Jon Skindlovmeteorologist /climatologistWater Resource Operations Salt River Project, Phoenix, AZ
Roosevelt Dam and Lake, AZ
Reservoir Operations andWater Supply Planning at Salt River Project
DOI project workshop28 March 2014University of Arizona, Tucson, AZ
VARIABILITY – VULNERABILITY – UNCERTAINTY
Salt River ProjectSalt River Project
• Established 1903• A Federal reclamation
project• A private corporation• Delivers almost 1 million
acre-feet per year
• Established 1937 as a political subdivision of the state of Arizona
• 32,452 million kWh sold in FY13
• 969,000 customers in and around the Phoenix metro area
Salt River Valley Water Users Association
SRP Agricultural Improvement and Power District
Roosevelt Damand Lake
Salt River
Superstition Mtns.
Phoenix
Looking west, late winter 2008
WATER--Reliable Supply--Drought--Flood
Colorado River Storage Capacity
Lake Mead26.3 maf
SRP lakes2.3 maf
Lake Powell24.4 maf
Total System(Upper and Lower
Colorado)
59.2 maf
SRP… Manages 4 reservoirs on the Salt River, 2 on the Verde River and 1 on East Clear Creek;
Operates approximately 260 groundwater wells;
Delivers nearly 1 million acre-feet of water per year to the 250,000 acre SRVWUA service area.
Mogollon Rim
Salt River
Las Vegas
CAP
Salt/Verde watershed area (13,000 sq mi)
“metro area”
CAP
CAP canal
40 milesSRVWUA area
(375 sq mi: 250,000 acres)
Salt/Verde watershed area (13,000 sq mi)
VERDE CONSERVATIONSTORAGE:302,403 AF
SALT CONSERVATION STORAGE:
2,025,798 AF
2026’
1798’
1529’
1914’
HorseshoeDam
StewartMountain
Dam
RooseveltDam
BartlettDam
Mormon Flat Dam
Horse Mesa Dam
Total Conservation Storage: 2,328,201 AF
Horseshoe109,217 AF
Bartlett178,186 AF
Saguaro Lake69,765 AF
Canyon Lake57,852 AF
Apache Lake245,138 AF
Roosevelt Lake1,653,043 AF
1660.5’
2218’ Top of Safety of Dams
2151’ Top of Conservation
01/09/07 REF/SVRSCIAF-8
C.C. CraginDam
6720’
C.C. Cragin15,000 AF
East Clear Creek Storage:15,000 AF
Verde River Storage:
287,403 AF
2100’ -
6720’ -
- 2000’
1506’ -
1610.5’ -
- 1748’
1891’ -
Salt River Project Reservoir System
Salt-Verde Watershed Normals
0
50
100
150
200
250
300
Infl
ow
, Ka
f
0
1
2
3
Pre
cip
ita
tio
n, i
nc
he
s
Inflow (median) Precipitation (average)
WINTER (build supply):
Precip. (Dec-Mar): 6.3 in
Runoff (Dec-May): 665 Kaf
SUMMER (meet demand):
Precip. (Jul-Sep): 6.8 in
Runoff (Jul-Sep): 120 Kaf
1971-2000
1890 1900 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000 20100
10
20
30
40
50
60
70
80
90
100
% A
vera
ge
Year
7 Years1898 - 1904
35%
7 Years1942 - 1948
62%
5 Years1953 - 1957
47%
4 Years1974 - 1977
52%19+ Years
1995 – 2014???%
Salt River Project Historic Drought Periods(Average Runoff 1913–2010 = 1,198,536 AF)
Longer Period Of Sustained Drought
DRY DRY DRYWET WET
1892-1904: 2 wet, 11 dry
1905-45: 28 wet, 13 dry
1946-64: 5 wet, 14 dry
1965-95: 19 wet, 12 dry
1996-2013: 4 wet, 14 dry
What is Normal?
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 310
5
10
15
20
25
30
35
40
45
50
Water Year Volume
31-year median (1982-2012)
Lowest to Highest
Wat
er Y
ear V
olum
e (1
00,0
00 a
cre-
feet
)
Median = 775,000 acre-feet
11 years below 500,000 acre-feet
15 years above 1,000,000 acre-feet
Creating Dependability from Variability
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 210
500,000
1,000,000
1,500,000
2,000,000
2,500,000
3,000,000
3,500,000
4,000,000
4,500,000
Salt + Tonto + Verde Inflow Total DeliveriesYear
Volu
me
(Acr
e-Fe
et)
From 2001-2010 total demand: 785 to 910 kaf
Water Resources Planning Will Change
Change in Agricultural Water Use
1955 1975
1990 2008
PHX
PHX
PHX
PHX
Salt River Water Users Association area
Pop. 0.5 M Pop. 1.3 M
Pop. 2.1 M Pop. 4.0 M
0
50,000
100,000
150,000
200,000
250,000
1957 1961 1965 1969 1973 1977 1981 1985 1989 1993 1997 2001 2005
Year
Acr
ea
ge
Agricultural Urban
Urbanization of Member Lands
SRP expects to be “fully urbanized” by 2017
http://phoenix.gov/waterservices/wrc/yourwater/wrplan.html
PHXT M
C
SG
P
G
http://phoenix.gov/waterservices/wrc/yourwater/wrplan.html
Primary water sources for Valley cities:SRP (surface and ground)CAP (surface)City wells (ground)
[demand: 300 – 340 kaf]
KNOWNS and UNKNOWNS
1890 1900 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000 20100
10
20
30
40
50
60
70
80
90
100
% A
vera
ge
Year
7 Years1898 - 1904
35%
7 Years1942 - 1948
62%
5 Years1953 - 1957
47%
4 Years1974 - 1977
52%19+ Years
1995 – 2014???%
Salt River Project Historic Drought Periods(Average Runoff 1913–2010 = 1,198,536 AF)
Longer Period Of Sustained Drought
“Drought of Record”
SRP Storage, Pumping & Water Allotment Planning
0
200
400
600
800
1000
1200
1400
1600
1800
2000
1 2 3 4 5 6 7
Year
Res
ervo
ir S
tora
ge
(KA
F)
Gro
un
d W
ater Pro
du
ction
(KA
F)
Median Inflow
Drought of Record
Minimum Pumping
Maximum Pumping
- 75
- 325
- 250
- 200
- 125
3.0 AF/AC
2.5 AF/AC
2.0 AF/AC
Storage Planning Diagram
Storage Planning Diagram
Questions?Questions?
www.srpnet.com [email protected]
http://phoenix.gov/waterservices/wrc/yourwater/wrplan.html
Journal of Hydrology 509 (2014) 454–473
http://phoenix.gov/waterservices/wrc/yourwater/wrplan.html
http://phoenix.gov/webcms/groups/internet/@inter/@dept/@wsd/documents/web_content/wsdfaqsupply030714.pdf
Upper Colorado River Basin
Salt-Verde-Tonto River Basin
Demand
Demand is the water that is called for at a predetermined time to be delivered to shareholder or contract customer land, water treatment plants, or power plants.
Today, demand is difficult to predict:
• Water use efficiency• Increasing densification• Extended drought• Agriculture to urban• Economic downturn
From 2001-2010 total demand ranged from 785 KAF to 910 KAF.
Demand
Demand is difficult to predict:
• Water use efficiency• Increasing densification• Extended drought• Agriculture to urban• Economic downturn