River and Reservoir Watch Version 4.6

River Discharge and Reservoir Storage Changes Using Satellite Microwave Radiometry

Location of this Satellite Gauging Reach

Not calibrated to actual discharge and runoff values

Chi

Center:

103.675

Long.

Signal/Noise:

10.0

GFDS Area ID:

237

Thailand

Center:

16.2965

Lat.

Good

GEE Time Lapse

WorldView Time Lapse

Learn more about this river

Not actual area

15318

sq km

WBM contributing area

Last measured:

12-Oct-25

Discharge:

4120

m3/sec

Status:

#N/A

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

7-day Runoff

#N/A

mm

#N/A

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

Flood Magnitude:

#N/A

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

2824

m3/s

Annual Runoff (percent of mean, 1998-2021)

Mean Runoff

6134

mm

Mann-Kendall Runoff Trend Analysis (5%)

M-K

121

Significant?

yes

Major Floods

10 = flood of record

Sen's slope:

0.02

z-stat

2.64

Regression slope:

0.02

p-value

0.01

Annual Maximum Q, m3/s

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

Access to Data

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

Mann-Kendall Max Q Trend Analysis (5%)

M-K

179

Robert.Brakenridge@Colorado.edu

Sen's slope:

306.06

z-stat

3.92

Regression slope:

313.02

p-value

0.00

Significant?

yes

Coefficients of Polynomial or Linear Rating Curve used:

364260.59

-774964.91

411282.39

x^4

x^3

x^2

x

+