River and Reservoir Watch Version 4.5

River Discharge and Reservoir Storage Changes Using Satellite Microwave Radiometry

Location of this Satellite Gauging Reach

This SGR records changing lake extent, not discharge or runoff

Tonle

Center:

103.05

Long.

Signal/Noise:

30.2

GFDS Area ID:

227

Cambodia

Center:

13.589

Lat.

Excellent

GEE Time Lapse

WorldView Time Lapse

Learn more about this river

Not Actual!

758957

sq km

WBM contributing area

Last measured:

1-May-24

Use discharge values to indicate  relative lake area.

Discharge:

1456

m3/sec

Status:

1

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

7-day Runoff

1.1

mm

#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:

0

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

Use "discharge" values as relative lake area extent

Notes:

Log Pearson Type III is used to compute recurrence intervals from 22 years of record (1998-2019)

Mean discharge

4601

m3/s

Annual Runoff (percent of mean, 1998-2021)

Mean Runoff

192

mm

Major Floods

10 = Flood of Record

Protected Under United States Copyright Law

Access to Data

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

364260.59

-774964.91

411282.39

x^4

x^3

x^2

x

+