River and Reservoir Watch Version 4.6
River Discharge and Reservoir Storage Changes Using Satellite Microwave Radiometry Location of this Satellite Gauging Reach
Amazon Center: -58.32 Long. Signal/Noise: 7.5
GFDS Area ID: 146 Brazil Center: -3.14 Lat. Fair
GEE Time Lapse WorldView Time Lapse Learn more about this river 4315186 sq km WBM contributing area
Last measured: 12-Oct-25
Discharge: 191354 m3/sec Status: 2 (1, low; 2, normal flow; 3, moderate flood, r >2.33 y; 4, major flood, r >5 y)
7-day Runoff 28.6 mm 127% (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 moving average is applied. Geolocation correction, commencing April 1, 2012: 0
Low flow is 20th percentile discharge for this day, 2003-2013. Noise filter: >.05 daily signal change
Notes: Log Pearson Type III is used to compute recurrence intervals from 27 years of record (1998-2024)
Mean discharge 169526 m3/s
Annual Runoff (percent of mean, 1998-2021) Mean Runoff 1256 mm
Mann-Kendall Runoff Trend Analysis (5%) M-K 175 Significant? yes Major Floods 10 = flood of record
Sen's slope:
0.01 z-stat 3.84
Regression slope: 0.01 p-value 0.00
Annual Maximum Q, m3/s
Brakenridge, G. R., Nghiem, S. V., Kugler, Z., 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
Robert.Brakenridge@Colorado.edu Sen's slope: 3943.50 z-stat
  Regression slope: 3821.09 p-value 0.00
Significant? yes
    Coefficients of Polynomial or Linear Rating Curve used:   0.00   -1233506.00 1200328.33  
        x^4 x^3 x^2 x +