River and Reservoir Watch Version 4.5

River Discharge and Reservoir Storage Changes Using Satellite Microwave Radiometry

Uncalibrated to discharge and actual catchment area

Great Ruaha

Center:

38.97

Long.

Signal/Noise:

8.1

GFDS Area ID:

1290

Tanzania

Center:

-8.01

Lat.

Good

GEE Time Series

WorldView Time Series

Learn more about this river

21359

sq km

WBM contributing area

Last measured:

30-Dec-24

Discharge:

538

m3/sec

Status:

(1, low; 2, normal flow; 3, moderate flood, r >1.5 y; 4, major flood, r >5 y)

7-day Runoff

14.4

#N/A

(7-day runoff compared to 20 y average for this date, 2002-2021)

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:

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

Log Pearson III computes recurrence intervals from 19 years of record (2002-2019)

Change in 10 yr flood discharge (2010-2021 /1998-2009):

198.0%

Mean discharge

639

m3/s

Annual Runoff (percent of mean, 1998-2021)

Mean Runoff

948

Major Floods

Change in Annual Runoff (2010-2021/1998-2009):

94.3%

10 = Flood of Record

Protected Under United States Copyright Law

Access to Data

Sample Citation: Brakenridge, G. R., Kettner, A. J., Nghiem, S. V., Kugler, Zs., Paris, S. and Cohen, S., River and Reservoir Watch Version 4.5,

DFO Flood Observatory, University of Colorado, USA. http://floodobservatory.colorado.edu/ SiteDisplays/ 20.htm (Accessed 20 February 2023).

Robert.Brakenridge@Colorado.edu

Coefficients of Polynomial or Linear Rating Curve used:

-21939.23

22034.54

x^4

x^3

x^2