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East and South-East Asia
Dam Facts and Statistics

   Consultations:
South Asia
Dec 1998
Latin America
Aug 1999
Africa/
Middle East

Dec 1999
East & SE Asia
Feb 2000
 

These statistics were drawn from the register of the International Commission on Large Dams (ICOLD) which may not reflect the total population of large dams in the region. China has registered 1855 dams with ICOLD but it is believed another 20 145 unregistered large dams may exist in China. Additionally, Vietnam has registered three dams with ICOLD while the International Hydropower Association estimates there are more than 100 large dams in Vietnam.

Countries represented are those who were invited to submit papers in anticipation of WCD's East and South East Asia consultation in Hanoi, Vietnam 26-27 February 2000.


General Dam Statistics:

  • The total number of registered large dams in East and South-East Asia is 4 157, including unregistered dams in China and Vietnam that number may be 26 257.
  • The countries with the most registered dams are China (1 855), Japan (1 077) and North Korea (765).
  • The single busiest decade in terms of dam commissioning was 1971-1980.
The five largest dams in East and South-East Asia by height are:
  • Ertan Dam, Yialongjiang River, China, 240m
  • Kurobe Dam, Kurobe River, Japan, 186m
  • Longyangxia Dam, Yellow River, China, 178m
  • Tianshengquiao no.1 dam, Nanpanjiang River, China, 178m
  • Takase Dam, Takase River, Japan, 176m
The five largest dams in East and South-East Asia by reservoir capacity are:
  • Sanmenxia Dam, Yellow River, China, 35.4 billion m3
  • Wuluwati Dam, Kalakashihe River, China, 34.7 billion m3
  • Balambano Dam, Luwu City, Indonesia, 31.5 billion m3
  • Xin'anjiang Dam, Xin'anjiang River, China, 21.6 billion m3
  • Danjiangkou Dam, Hanjiang River, China, 20.9 billion m3

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Irrigation In East and South-East Asia:

Most irrigated countries:

China - 51.8 million ha
Thailand - 5.0 million ha
Indonesia - 4.8 million ha
Japan - 2.7 million ha
Vietnam - 2.3 million ha

Least irrigated countries:
(less than 300 000 ha under irrigation)

Brunei Darussalam
Cambodia
Hong Kong
Laos
Mongolia

Source: FAOSTAT Database, UN Food & Agriculture Organisation,1999

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Official Development Assistance Commitments for Hydroelectric Power Plants:
Per Developing Country 1978-1997

Note:
Total Amount Committed: 15 US$ billion
China, Indonesia, and Thailand (East & SE Asian countries) received almost 20% of all official aid for hydroelectric projects between 1978-1997. In other words, close to one-fifth of all official flows for hydroelectric power plants have been invested in East and SE Asia.
China has received the 2nd largest percentage of official aid for hydroelectric projects globally after India.

Source: CRS (Creditor Reporting System), an OECD (Organisation for Economic Co-operation and Development) database comprising data on ODA (Official Development Assistance) to developing countries, OA (Official Aid) to countries in transition, and other lending.

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Number of Registered Dams Commissioned by Decade:

Source: ICOLD Register of Dams, 1998.

Note:
Though there are believed to be over 22 000 large dams in China, only 1 855 are registered.
* Statistics for the period 1990-1996 are believed to be incomplete due to under-reporting.

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Countries estimated to have the largest irrigation systems - 1997:

Source: FAOSTAT Database, UN Food & Agriculture Organisation, 1999.

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Number of Large Dams in East and South East Asia:

The True Picture..?

In addition to the 1 855 Chinese dams officially registered with the International Commission on Large Dams (ICOLD), it is estimated another 20 145 unregistered dams may exist in China:

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Population Figures of East Asian Countries 1998:

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