Site ID: 277 Lat. 16.1184 Guatemala Alta Verapaz
River: Chixoy Long. -90.4368
Site name: San Augustin Contributing area: 10902 km2 Ratio to Comparison Station: 0.02
Latest measurement: 30-Jul-10 Mean annual runoff: 52 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 20.8 mm
Latest M/C ratio: 1.10 Seven day total: 0.2 mm
Estimated current discharge: 3 m3/sec Percent of mean 7-day total: 8.4 % (today's value compared to mean for same period, 2003-2009)
Ice-cover determination: 5 yr recurrence flood: 1518 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 1388 m3/sec (from Gumbel Extreme Value analysis)
Comparison Station Information:  Pakse (2469260)           Contributing Area:   sq mi 536010 sq km
(Data from this gaging station are used for the calibration to discharge, with an adjustment for different contributing areas)
Notes: Calibration to nearby ground station has not yet been accomplished.
Discharge and runoff, based on satellite remote sensing (NASA AMSR-E data)
(For U.S, sites, nearby ground station discharge may also be shown)
Annual  Monthly Total Runoff (mm), computed from above satellite-based discharge data
Runoff
(mm) Jan Feb Mar April May June July Aug Sept Oct Nov Dec
11 2002 no data no data no data no data no data no data no data 8.2 0.7 0.8 0.8 0.8
77 2003 0.8 0.7 2.1 38.1 19.1 9.4 1.1 0.8 0.8 0.8 2.3 0.8
26 2004 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 16.7 0.8 0.8
83 2005 0.8 0.7 37.4 0.8 3.2 10.9 0.1 0.8 1.9 24.6 0.7 0.8
13 2006 0.8 0.7 0.7 0.8 2.9 0.8 0.8 3.9 0.8 0.8 0.0 0.0
33 2007 0.8 0.9 0.8 0.8 11.3 7.6 0.8 6.7 0.8 0.8 0.8 0.8
89 2008 0.8 0.8 0.8 0.8 17.7 2.9 14.9 4.8 27.5 16.0 0.8 1.2
47 2009 0.8 0.7 0.8 1.4 0.8 25.9 8.7 0.8 2.7 0.8 2.7 1.0
21 2010 0.8 0.7 1.5 0.8 2.6 0.8 13.6 0.1 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 52 Standard Deviation: 6.4
Trend in Annual Runoff (slope):  5.9
Discharge is estimated via a rating equation directly from the remote sensing data (M/C ratio) shown below.
Explanation:   Green line records upwelling microwave emission from within 5 km radius of a calbration land target; blue line is emission from within 5 km radious of the measurement target centered over the river.
Brown line is their ratio (M/C; scale on right) and is used to estimate river discharge via a rating equation.
Rating equations are being developed and applied on an individual basis. For calibration status, see "notes" entry, above.
GoogleEarth View of Measurement Site
Return
Estimated
Disharge
Data
Date m3/sec
22-Jul-02 3
23-Jul-02 3
24-Jul-02 3
25-Jul-02 3
26-Jul-02 3
27-Jul-02 3
28-Jul-02 3
29-Jul-02 3
30-Jul-02 3
31-Jul-02 3
1-Aug-02 3
2-Aug-02 3
3-Aug-02
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7-Aug-02
8-Aug-02
9-Aug-02
10-Aug-02 3
11-Aug-02 3
12-Aug-02 3
13-Aug-02 3
14-Aug-02 3
15-Aug-02 3
16-Aug-02 3
17-Aug-02 3
18-Aug-02 3
19-Aug-02 3
20-Aug-02 3
21-Aug-02 3
22-Aug-02 3
23-Aug-02 3
24-Aug-02 116
25-Aug-02 358
26-Aug-02 131
27-Aug-02 369
28-Aug-02 3
29-Aug-02 3
30-Aug-02 3
31-Aug-02 3
1-Sep-02 3
2-Sep-02 3
3-Sep-02 3
4-Sep-02 3
5-Sep-02 3
6-Sep-02 3
7-Sep-02 3
8-Sep-02 3
9-Sep-02 3
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15-Sep-02 3
16-Sep-02 3
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21-Sep-02
22-Sep-02 3
23-Sep-02 3
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27-Sep-02 3
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29-Sep-02 3
30-Sep-02 3
1-Oct-02 3
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30-Jun-03 278
1-Jul-03 38