Site ID: 2195 Lat. 23.8025 Taiwan Nan-t'ou
River: Hsilo Long. 120.4969
Site name: Hsilo Contributing area: 2855 km2 Ratio to Comparison Station: 0.12
Latest measurement: 8-Jan-10 Mean annual runoff: 3099 mm (2003-2007)
Hydrologic status: 2 Normal flow Total runoff this year: 2341 mm
Latest M/C ratio: 1.10 Seven day total: 1 mm
Estimated current discharge: 65 m3/sec Percent of mean 7-day total: 128.4 % (today's value compared to mean for same period, 2003-2007)
Ice-cover determination: 5 yr recurrence flood: 2038 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow, 2 = Normal flow, 3 = Flood, 4 = Major Flood 2028 m3/sec (from Gumbel Extreme Value analysis)
Comparison Station Information:  Tokwe Confluence D/s C/s (1495240)       Contributing Area: 7280 sq mi 23237 sq km
(Data from this gaging station are used for the calibration to discharge, with an adjustment for different contributing areas)
Notes: Comparison station is placeholder, only; this site is not yet calibrated to actual discharge
Discharge and runoff, based on satellite remote sensing (NASA AMSR-E data)
(For U.S, sites, nearby ground station discharge may also be shown)
2008-Present
2002-Present
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
479 2002 no data no data no data no data no data no data no data 256.1 10.3 6.3 57.4 148.9
3441 2003 345.9 1024.6 661.6 145.7 7.2 112.9 772.0 189.1 3.1 16.3 42.8 120.0
3635 2004 290.6 887.4 556.6 125.7 3.1 10.7 846.5 518.8 32.9 66.2 53.0 243.8
3820 2005 242.5 801.3 943.0 325.1 5.4 33.0 671.6 439.8 79.0 35.6 128.8 114.7
2131 2006 48.8 410.6 622.5 160.1 38.1 32.8 575.1 218.9 18.7 4.9 0.0 0.0
2468 2007 46.9 313.2 615.3 57.6 13.5 57.0 642.1 453.5 19.6 109.0 65.9 73.9
2341 2008 65.2 458.1 761.0 38.1 4.4 35.6 487.5 297.5 33.5 57.4 59.2 43.7
2440 2009 48.4 605.2 526.8 82.6 3.5 132.1 606.8 299.1 3.0 25.0 36.0 71.2
Discharge is estimated directly via a rating equation from the remote sensing data (M/C ratio) shown below.
Explanation:   Green line records upwelling microwave emission from a land parcel (ca 10 km x 10 km) near the river; blue line from a parcel 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.
When data above show calibration site values lower than for the measurement site, discharge estimation may not be possible.
GoogleEarth View of Measurement Site
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