| Site ID: |
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2112 |
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Lat. |
23.3228 |
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China |
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Guangdong |
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| River: |
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Bei |
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Long. |
112.8676 |
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| Site name: |
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Datang |
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Contributing
area: |
39692 |
km2 |
Ratio to Comparison
Station: |
1.71 |
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| Latest measurement: |
21-Nov-09 |
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Mean annual
runoff: |
1845 |
mm |
(2003-2007) |
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| Hydrologic status: |
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2 |
Normal flow |
Total runoff
this year: |
1957 |
mm |
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| Latest M/C ratio: |
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1.66 |
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Seven day
total: |
2 |
mm |
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| Estimated current discharge: |
2474 |
m3/sec |
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Percent of
mean 7-day total: |
69.7 |
% |
(today's value compared to
mean for same period, 2003-2007) |
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| Ice-cover determination: |
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5 yr
recurrence flood: |
3795 |
m3/sec |
(from Log Pearson III
analysis) |
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| Status Codes: 1 = Low
flow, 2 = Normal flow, 3 = Flood, 4 = Major Flood |
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3757 |
m3/sec |
(from Gumbel Extreme Value
analysis) |
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| Comparison Station Information: |
Tokwe
Confluence D/s C/s (1495240) |
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Contributing
Area: |
7280 |
sq mi |
23237 |
sq km |
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| (Data from this gaging station are used for the calibration to
discharge, with an adjustment for different contributing areas) |
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| Notes: |
Comparison station is
placeholder, only; this site is not yet calibrated to actual discharge |
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| Discharge and runoff, based on satellite remote sensing (NASA
AMSR-E data) |
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| (For U.S, sites, nearby ground station discharge may also be
shown) |
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2008-Present |
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2002-Present |
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| Annual |
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|
Monthly Total Runoff (mm),
computed from above satellite-based discharge data |
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| Runoff |
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| (mm) |
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Jan |
Feb |
Mar |
April |
May |
June |
July |
Aug |
Sept |
Oct |
Nov |
Dec |
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| 725 |
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2002 |
no data |
no data |
no data |
no data |
no data |
no data |
no data |
114.1 |
134.7 |
162.1 |
160.3 |
153.3 |
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| 1886 |
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2003 |
163.0 |
137.0 |
132.5 |
155.3 |
159.2 |
143.5 |
184.1 |
166.6 |
163.3 |
180.3 |
129.7 |
171.3 |
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| 1909 |
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2004 |
143.2 |
142.5 |
130.2 |
159.4 |
159.4 |
164.4 |
176.5 |
138.4 |
173.5 |
193.7 |
159.5 |
168.0 |
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| 1896 |
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2005 |
123.5 |
100.7 |
143.4 |
147.5 |
169.0 |
166.9 |
185.3 |
174.7 |
168.3 |
188.5 |
156.2 |
171.6 |
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| 1585 |
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2006 |
147.5 |
127.3 |
122.3 |
139.7 |
170.1 |
170.3 |
178.5 |
182.6 |
169.5 |
177.5 |
0.0 |
0.0 |
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| 1950 |
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2007 |
144.4 |
156.1 |
129.3 |
143.1 |
167.5 |
166.3 |
184.0 |
167.6 |
174.1 |
189.6 |
172.0 |
156.1 |
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| 1957 |
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2008 |
129.7 |
136.3 |
155.9 |
160.2 |
142.5 |
145.3 |
192.5 |
197.8 |
177.3 |
184.3 |
169.7 |
165.3 |
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| 1731 |
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2009 |
152.4 |
167.6 |
139.2 |
137.5 |
155.6 |
172.1 |
177.2 |
169.0 |
161.3 |
183.9 |
115.2 |
0.0 |
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| Discharge is estimated directly via a rating equation from
the remote sensing data (M/C ratio) shown below. |
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