Chao Phraya River
Map of River
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Table of Basic Data
Name: Chao Praya river Location: primeval part of Thailand Area: 21,725 km
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Serial No. : Thailand-10 N 13° 29 18 ~ 16° 02 54 E 99° 31 06 ~ hundred and one° 01 30
Length of important stream: 712 km Highest mind: 284 m Lowest point: 0 m
Origin: Pak Nam Pho District, Nakhon Sawan body politic Outlet: Gulf of Thailand
Main geological features: Phu Kradung and Phra Wihan Formation, Rattburi Formation, Alluvium, Eluvium, Kanchanaburi Formation, Marine Formation, Andesite-Rhyorite, porphyritic rock and Tuff, Bassalt Main Tributaries: Main Chao Phraya river (21,725 km ), Bung Boraphet (4,902 km ) Main Lake: None Main Reservoir: Chao Phraya Dam (1957) Mean one-year Precipitation: 1,487.3 mm. Mean Annual Runoff: 117.0 m3/s at sang Khla Buri District, Chainat Province Population: 11,710,968 (1998) Main Cities: Bangkok, Nakhon Phathom, Ayutthaya, Samut Prakan, Ang Thong, Singburi, Lopburi, Chai Nat, Pathum Thani, Non Thaburi, Nakhon Sawan, Phet Chaboon, Samut Sakhon
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state of matter use: Forest 2.1 %, Agriculture & urban area 92.7 %, peeing resource 5.2 %
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General Description
The origin of the Chao Phraya River is the confluence of the Ping, Wang, Yom and Nan rivers around 200 km north of Bangkok.
From Nakhon Sawan, the river flows through the central excess passing Bangkok toward the Gulf of Thailand. At Ayutthaya about 55 km North of Bangkok, the Chao Phraya river is joined by the Pasak river which rises in the sort between the central alluvial plain and the North-east plateau. The reduce Chao Phraya river basin starts from Nakhon Sawan and has a drainage area of 21,725 km2 the average annual precipitation is 1,487.3 mm and the average discharge at Sang Khla Buri District, Chainat Province has been 117.0 m3/s. Chao Phraya man-made lake built in 1957 is the largest existing reservoir in this basin.
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Geographical Information
Geological Map
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