2007-11-23_HYDROLOGY - M1977300 ‎(2)‎

• Permit No: M1977300
• IBM Index Class Name: HYDROLOGY
• Doc Date: 11/23/2007
• Doc Name: Hydro Eval, Vol. II- Ap. A- Ralston Creek Flow Data
• From: Cotter and Whetstone
• To: DRMS
• Permit Index Doc Type: Hydrology Report
• Email Name: DB2
• Media Type: D
• Archive: No

RATING CURVE AND FLOW DATA FOR
STATION SW-AO01
1. Rating Curve Calculation (Stage vs Flow Rate)
Location Date Stage (ft) Flow (cfs) slope (m) intercept (b)
•
SW-A001 Base 0 0.00 1.83 0
SW-A001 10/20/1998 0.93 1.70 62.85 -56.75
SW-AO01 8/2/1999 1.26 22.44 23.43 -7.08
SW-AO01 5/19/1999 1.7 32.75 23.43 -7.08
II. Stage Readings and Computed Flow Rates
Date Location Stage (ft) Flow (cfs)
10/1/1998 SW-A001 0.93 1.70
11/19/1998 SW-A001 0.95 2.96
1/19/1999 SW-A001 0.95 2.96
2/15/1999 SW-A001 1 6.10
3/15/1999 SW-A001 1.1 12.38
5/17/1999 SW-AO01 1.8 35.09
7/19/1999 SW-AO01 0.87 1.59
8/2/1999 SW-AO01 1.26 22.44
9/13/1999 SW-AO01 1.1 12.38
May-01 SW-A001 1.25 21.81
Jun-01 SW-AO01 0.90 1.65
Jul-01 SW-AO01 0.90 1.65
Aug-01 SW-AO01 0.80 1.46
Nov-01 SW-AO01 1.10 12.38
May-03 SW-A001 2.25 45.64
•

Rating Curve for SW-AO01
35
30
----------- ----------- ------------ ------------ ----------- -- ------
u. 25
20
w
M15
0 10
ILL
5
0
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00
Stage (feet)
Calculated Stream Flow for Station SW-AO01
50
45
40
------------
35
CO)
v 30 '
*4 25
-I----------- -----------
c 20 -----------i------ --- -- ---------------------------------' ------- --- ----------- ----------- ------------ ----------- ----------
u- 15
10
5 --- ----------------------
-------- - ----
0
Jul-98 Jan-99 Jul-99 Jan-00 Jul-00 Jan-01 Jul-01 Jan-02 Jul-02 Jan-03 Jul-03 Jan-04
Station A001