Figure 2. Topography and Drainage

The Philippine archipelago lies in Southeast Asia in a position that has led to its becoming a cultural crossroads, a place where Malays, Chinese, Spaniards, Americans, and others have interacted to forge that unique cultural and racial blend known to the world as Filipino. The archipelago numbers some 7,100 islands and the nation claims an exclusive economic zone (EEZ--see Glossary) of 200 nautical miles from its shores. The Philippines occupies an area that stretches for 1,850 kilometers from about the fifth to the twentieth parallels north latitude. The total land area is almost 300,000 square kilometers. Only approximately 1,000 of its islands are populated, and fewer than one-half of these are larger than 2.5 square kilometers. Eleven islands make up 94 percent of the Philippine landmass, and two of these--Luzon and Mindanao--measure 105,000 and 95,000 square kilometers, respectively. They, together with the cluster of the Visayan Islands that separate them, represent the three principal regions of the archipelago that are identified by the three stars on the Philippine flag. Topographically, the Philippines is broken up by the sea, which gives it one of the longest coastlines of any nation in the world (see fig. 2). Most Filipinos live on or near the coast, where they can easily supplement their diet from approximately 2,000 species of fish.

Off the coast of eastern Mindanao is the Philippine Trough, which descends to a depth of 10,430 meters. The Philippines is part of a western Pacific arc system that is characterized by active volcanoes. Among the most notable peaks are Mount Mayon near Legaspi, Taal Volcano south of Manila, and Mount Apo on Mindanao. All of the Philippines islands are prone to earthquakes. The northern Luzon highlands, or Cordillera Central, rise to between 2,500 and 2,750 meters, and, together with the Sierra Madre in the northeastern portion of Luzon and the mountains of Mindanao, boast rain forests that provide refuge for numerous upland tribal groups. The rain forests also offer prime habitat for more than 500 species of birds, including the Philippine eagle (or monkey-eating eagle), some 800 species of orchids, and some 8,500 species of flowering plants.

The country's most extensive river systems are the Pulangi (Rio Grande), which flows into the Mindanao River the Agusan, in Mindanao which flows north into the Mindanao Sea the Cagayan in northern Luzon and the Pampanga, which flows south from eastCentral Luzon into Manila Bay. Laguna de Bay, southeast of Manila Bay, is the largest freshwater lake in the Philippines. Several rivers have been harnessed for hydroelectric power.

Data as of June 1991