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
STA TION SW-BPL
1. Rating Curve Calculatio n (Stage vs Flow Rate)
Location Date Stage (ft) Flow (cfs) slope (m) intercept (b)
SW-BPL Base 0 0.00 3.34 0
SW-BPL 10/20/1998 0.76 2.54 36.27 -25.03
SW-BPL 7/19/1999 0.87 6.53 31.83 -21.16
SW-BPL 5/19/1999 1.64 31.04 31.83 -21.16
II. Stage Read ings and Computed Flow Rates
Date Location Stage (ft) Flow (cfs)
10/20/1998 SW-BPL 0.76 2.54
11/19/1998 SW-BPL 0.8 3.99
12/17/1998 SW-BPL 0.74 2.47
1/19/1999 SW-BPL 0.8 3.99
2/15/1999 SW-BPL 0.8 3.99
3/15/1999 SW-BPL 0.85 5.80
4/19/1999 SW-BPL 1 10.67
5/17/1999 SW-BPL 1.7 32.95
7/19/1999 SW-BPL 0.87 6.53
9/13/1999 SW-BPL 0.95 9.08
May-01 SW-BPL 1.10 13.85
Jun-01 SW-BPL 0.63 2.11
Jul-01 SW-BPL 0.65 2.17
Aug-01 SW-BPL 0.55 1.84
Sep-01 SW-BPL 0.61 2.04
Oct-01 SW-BPL 0.55 1.84
Nov-01 SW-BPL 0.62 2.07
Mar-02 SW-BPL 0.74 2.47
Apr-02 SW-BPL 0.72 2.41
May-02 SW-BPL 0.90 7.48
Jun-02 SW-BPL 0.35 1.17
Dec-02 SW-BPL 0.45 1.50
Jan-03 SW-BPL 0.47 1.57
Feb-03 SW-BPL 0.52 1.74
Mar-03 SW-BPL 1.04 11.94
May-03 SW-BPL 1.62 30.40
Jun-03 SW-BPL 0.98 10.03
Jul-03 SW-BPL 0.42 1.40
Sep-03 SW-BPL 0.55 1.84
Rating Curve for SW-BPL
35
30
----------------- ------------------------ ----------- --- ----
-25 v --------------------------- --
d 20
15
3
10
c
5
---
------- --------
0
0 0.25 0.5 0.75 1 1.25 1.5 1.75
Stage (feet)
Calculated Stream Flow for Station SW-BPL
35
30

-------------------
----
25 ,----------L--------
-
W

LL
20 - ------,------- ' --
- -------
Y -

R
15 4 _________-________,

0
LL 10
5

0
Jan-98 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 BPL