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Lake Lanao
Mindanao, Philippines
Earth's Natural Wonders in Asia
 
Lake Lanao is the second largest lake in the Philippines and has an area of 131 square miles (340 square km). Its outlet is the Agus River, which flows north, over Maria Cristina Falls, where there is a hydroelectric power plant, to Iligan Bay. There are numerous Muslim villages around the lake[2].
Max. length-33 km
Lake Lanao, Marawi City, Lanao del Sur [1]
Max. Width-20 km  

Lake Lanao

Lake Lanao or Ranaw is a large lake in the Philippines, located in Lanao del Sur province in the country's southern island of Mindanao. With a surface area of 340 km². (131 square miles), it is the largest lake in Mindanao, and the second largest lake in the Philippines and counted as one of the 15 ancient lakes in the world.

The lake was formed by the tectonic-volcanic damming of a basin between two mountain ranges and the collapse of a large volcano. It has a maximum depth of 112 meters, and a mean depth of 60.3 meters. The basin is shallowest towards the north and gets progressively deeper towards the south.

The lake is fed by four rivers. Its only outlet is the Agus River, which flows southwest into Iligan Bay via two channels, one over the Maria Cristina Falls and the other over the Linamon Falls. A hydroelectric plant installed on the Lanao Lake and Agus River system generates 70% of the electricity used by the people of Mindanao.

The lake is home to 18 endemic species of freshwater fish and supports a large number of waterfowl. In October 2006, a study from the Mindanao State University discovered massive algae contamination in Lake Lanao[2]. Initially, poor sewage and agricultural waste management were seen as the culprit to the contamination. However, the Department of Agriculture and the Bureau of Fisheries and Aquatic Resources stated that soil erosion from indiscriminate logging and extensive land use and farming are the problems that caused the algae contamination.

The lake is home to 18 endemic species of freshwater fish and supports a large number of waterfowl. In October 2006, a study from the Mindanao State University discovered massive algae contamination in Lake Lanao. Initially, poor sewage and agricultural waste management were seen as the culprit to the contamination. However, the Department of Agriculture and the Bureau of Fisheries and Aquatic Resources stated that soil erosion from indiscriminate logging and extensive land use and farming are the problems that caused the algae contamination

 

It is about the origin of Lake Lanao

 jeremiahbanzon95
August 09, 2008

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References
 
1. Flickr- Lake Lanao- Creative Commons Attribution License-retrieved 8/12/2009
2. "Lanao, Lake." Encyclopædia Britannica. Encyclopædia Britannica 2009 Deluxe Edition. Chicago: Encyclopædia Britannica, 2009.
3. Wikipedia-Lake Lanao-retrieved 8/13/2009 
 
 

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