Hydrology

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Hydrology

• AGU Townhall 2008
• Hydrology Slides
• funded by
• CNES, JPL, NASA, and
• OSUs Climate, Water, Carbon Program

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30M Lakes gt 1 hectare
Photo Larry Smith
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Amazon
Downing et al., 2006
Siberia
Ohio
Photos K. Frey, B. Kiel, L. Mertes
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SWOT capability to observe water height
Ohio River SRTM Water elevation measurements
In Situ observ-ations from Carlston, 1969
originally by Army Corps of Engineers
estimated SWOT
Courtesy Michael Durand, OSU
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SWOT capability to estimate discharge
Ohio River accuracy estimate based on

• Expected SWOT height observation accuracy
• Temporal sampling errors
• River width

Courtesy Elizabeth Clark, UW
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SWOT ability to observe storage change
Height errors and areal errors vary with lake
area Height errors dominate
Results from Peace Athabasca Delta lakes,
Canada
Courtesy Hyongki Lee, OSU
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SWOT capability to measure global storage change
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Analysis based on global lake frequency-area
distribution by Downing et al., 2006
10 km x 10 km
1 km x 1 km
250 m x 250 m
Courtesy Sylvain Biancamaria, CNES