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Astronaut Photography of Earth - Display Record

ISS010-E-5194

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	File Name	File Size (bytes)	Width	Height	Annotated	Cropped	Purpose
View	ISS010-E-5194.JPG	85448	639	435	No	No
View	ISS010-E-5194.JPG	256514	540	339	Yes	Yes	Earth From Space collection
View	ISS010-E-5194.JPG	770053	1000	628	No	Yes	NASA's Earth Observatory web site

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Electronic Image Data

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Identification

Mission: ISS010 Roll: E Frame: 5194 Mission ID on the Film or image: ISS010
Country or Geographic Name: VENEZUELA
Features: L. VALENCIA, MARACAY, MTS.
Center Point Latitude: 10.0 Center Point Longitude: -67.5 (Negative numbers indicate south for latitude and west for longitude)
Stereo: (Yes indicates there is an adjacent picture of the same area)
ONC Map ID: JNC Map ID:

Camera

Camera Tilt: 22
Camera Focal Length: 180mm
Camera: E4: Kodak DCS760C Electronic Still Camera
Film: 3060E : 3060 x 2036 pixel CCD, RGBG array.

Quality

Film Exposure:
Percentage of Cloud Cover: 10 (0-10)

Nadir

Date: 20041027 (YYYYMMDD)GMT Time: 141506 (HHMMSS)
Nadir Point Latitude: 8.8, Longitude: -66.9 (Negative numbers indicate south for latitude and west for longitude)
Nadir to Photo Center Direction: North
Sun Azimuth: 127 (Clockwise angle in degrees from north to the sun measured at the nadir point)
Spacecraft Altitude: 195 nautical miles (361 km)
Sun Elevation Angle: 54 (Angle in degrees between the horizon and the sun, measured at the nadir point)
Orbit Number: 1911

Captions

Lago de Valencia (Lake Valencia) is located in north-central Venezuela and is the largest freshwater lake in the country. The lake was formed approximately 2-3 million years ago due to faulting and subsequent damming of the Valencia River. The lake has been completely dry during several discrete periods of its geologic history. Since 1976 Lake Valencia water levels have risen due to diversion of water from neighboring watersheds—it currently acts as a reservoir for the surrounding urban centers (such as Maracay).

The vivid green algal blooms present in this image result from a continual influx of untreated wastewater from the surrounding urban, agricultural, and industrial land uses. This contributes to ongoing eutrophication, contamination, and salinization of the lake. Despite its picturesque location between the Cordillera de la Costa to the north and the Serrania del Interior to the south, Lake Valencia’s poor water quality limits opportunities for tourism and recreational activities.

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