WSP12525

• File Number: 8282.400
• Description: Colorado River Operations and Accounting - Deliveries to Mexico
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 6/1/2002
• Author: Seven Basin States
• Title: Summary of Water Resources in Northern Mexico - Seven Basin States Ad Hoc Committee - 06-01-02
• Water Supply Pro - Doc Type: Report/Study

OGJ-;gS

Summary of Water Resources in Northern Mexico .

Salton Sea
· The primary sources of flow to the Alamo and New Rivers from within Mexico include
municipal/industrial wastewater and raw sewage effluent from Mexicali, Colorado River water
not consumed or exported, and agricultural drainage from the northern portions of MexicaIi
Valley.

· The average annual flow of the Alamo River where it crosses the border ranges between 1,500
to 1,600 AF.

· Since 1980, the annual mean streamflow of the New River where it crosses the border at
Calexico has ranged from 118,000 to 264,000 AF. High flow years on the New River are
coincident with high flow years on the Colorado River.

Figure 7. Annual Mean Streamflow in the New River at the International Boundary
at Calexico, CA ( USGS Station No. 10254970)

275,000
250,000
225,000
~
....
Q)
~ 200,000
I
l!!
u
~ 175,000
~
0
r;:: 150,000
E
III
Q)
... 125,000
....
U)
l:
III 100,000
Q)
:!:
IV
:J 75,000
l:
l:
<(
50,000
25,000

- - ~ -
- - I-c- -
- f-- - - r-
- - - - r- r--
- - r- I-- I-- - I-- r-- - l-- ~ - - r-- - - r-- r-
r- I-- f- - I-- r- - I-- I-- - I-- r- - - I-- r-- r-
- f-- - - - - r- - - - ~ - - f-- - - -
- - - - - I-- - - r-- - - ~ - - f-- - - - -
- - - - - f-- - - r- - - r-- - - I-- - - - r-
_w- - - - L-- '-- - - '-- - '-- '-- -

1980

1982

1984

1986

1988 Y 1990
ear

1992

1994

1996

1998

Page 10 of 10

Seven Basin States June 1,2002