River and Reservoir Watch Version 4.6

River Discharge and Reservoir Storage Changes Using Satellite Microwave Radiometry

Location of this Satellite Gauging Reach

Sao Francisco

Center:

-42.664

Long.

Signal/Noise:

7.9

GFDS Area ID:

22

Brazil

Center:

-10.5225

Lat.

Fair

GEE Time Lapse

WorldView Time Lapse

Learn more about this river

422812

sq km

WBM contributing area

Last measured:

17-May-24

Discharge:

1009

m3/sec

Status:

1

(1, low; 2, normal flow; 3, moderate flood, r >2.33 y; 4, major flood, r >5 y)

7-day Runoff

1.2

mm

38%

(7-day runoff compared to 20 y average for this date, 2004-2023)

Flood Magnitude:

0.0

Scale of 0-10

Flood Magnitude Defined

Technical Summary

Notes:

7-day forward weighted moving average is applied.

Geolocation correction, commencing April 1, 2012:

0

Low flow is 20th percentile discharge for this day, 2003-2013.

Notes:

Log Pearson Type III is used to compute recurrence intervals from 24 years of record (1998-2023)

Mean discharge

2635

m3/s

Annual Runoff (percent of mean, 1998-2021)

Mean Runoff

197

mm

Mann-Kendall Runoff Trend Analysis (5%)

M-K

-65

Significant?

no

Major Floods

10 = flood of record

Sen's slope:

-0.02

z-stat

-1.41

Regression slope:

-0.01

p-value

0.16

Annual Maximum Q, m3/s

Brakenridge, G. R., Kettner, A. J., Paris, S., Cohen, S., Nghiem, S. V.

Access to Data

River and Reservoir Watch Version 4.6, DFO Flood Observatory, University of Colorado, USA

Mann-Kendall Max Q Trend Analysis (5%)

M-K

-23

Robert.Brakenridge@Colorado.edu

Sen's slope:

-131.24

z-stat

-0.48

Regression slope:

37.86

p-value

0.63

Significant?

no

Coefficients of Polynomial or Linear Rating Curve used:

13905071.29

-27308175.37

13408280.70

x^4

x^3

x^2

x

+