Subangdaku River is a river

River

A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

 situated in Sogod, Southern Leyte

Sogod, Southern Leyte

The Municipality of Sogod is a 2nd class municipality in the province of Southern Leyte, Philippines. Sogod is connected in the Maharlika Highway that links Luzon to Mindanao, one of the most important highways in the Philippines...

. It is the town's biggest river lying on the center part of the area that drains to the Sogod Bay. From the name itself in Cebuano

Cebuano language

Cebuano, referred to by most of its speakers as Bisaya , is an Austronesian language spoken in the Philippines by about 20 million people mostly in the Central Visayas. It is the most widely spoken of the languages within the so-named Bisayan subgroup and is closely related to other Filipino...

 means "big river" or "wide river"

For years, following the floodings of the river, it created an issue over the province. It has been quarried and rechanneled which caused the incidents. After many attempts, the issue remained unsolved.

Formation

By description, it can be considered as a braided river composed of several channels from near areas that divide and again reunite in a certain area forming an alluvial fan with very wide floodplain

Floodplain

A floodplain, or flood plain, is a flat or nearly flat land adjacent a stream or river that stretches from the banks of its channel to the base of the enclosing valley walls and experiences flooding during periods of high discharge...

. As such, the river usually became hazardous during typhoon after a heavy rain.

The river has been meandering its natural course. The occurrence is being observed by natives living along the river every time a flood occur.

Quarrying

Quarrying activities had been frequent in the area. Several companies have exploited and extracted sand and gravel in the area that are being accumulated by the river's current every time it floods.

Aftermath

The extraction of sand and gravel made the river bed lose its strength. For such, the river becomes vulnerable to flood and environmental occurrences such as erosion. After a typhoon strikes the area, because it has many channels, the current of the river easily gets so strong that it becomes hazardous to nearby villages. In 2001, part of the Philippine National Road was devastated.