The Subangdaku River is the largest river in Southern Leyte, Philippines. It drains into the Sogod Bay at the municipality of Sogod. The river's name means "big river" or "wide river" in Cebuano.
For years, following the flooding of the river, it created an issue over the province. It has been quarried and re-channeled which caused the incidents. After many attempts, the issue remained unsolved.
Formationedit
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. As such, the river usually became hazardous during typhoon after a heavy rain.[1]
The river has been meandering its natural course. The occurrence is being observed by natives living along the river every time a flood occurs.
Environmental issuesedit
The ecology of the Subangdaku River has been disturbed by human activity, such as: a) noise such as those caused by grinding of rocks during quarrying operations; b) fragmentation of river system preventing travel of aquatic organisms through a continuous river channel; c) silt deposited in the bay which is facilitated by rechanneling activities. The resulting fragmentation and siltation of Sogod Bay may have disturbed the life cycle of some organisms that require movement between the sea and the freshwater ecosystem such as Subangdaku. For instance, the behavior of a certain crab named locally as "Kamwa", has been reported by one of the local inhabitant who followed the crab upstream and found that the path the young traveled from the sea to upstream of Subangdaku reached until Barangay San Juan about 120 metres (390 ft) above sea level. The behavior of this crab was that the adult laid eggs in the sea and when the eggs are hatched, the baby crabs traveled upstream. Other species observed and/or reported downstream were Katang, Ulang (freshwater shrimp), a small mollusk (a gastropod) having some spines on its shell locally known as Odianga and two kinds of freshwater fishes.[1]
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. The extraction of sand and gravel weakens the river bed and makes the river 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.
A 1994 study by Silliman University identified sand and gravel mining, rechanneling, and sand harvest near the river's mouth, as causes of degraded habitats and major water quality issues of the area. The same report mentioned mining as one of the harmful practices that Sogod Bay should be protected from, and it recommended regulating quarrying and rechanneling with competent planning based on scientific evidence and monitoring as a way to protect the Subangdaku River.[1]
Referencesedit
^ abcEmelina G. Regis (March 21, 2002). . Subang Daku Issue. Ateneo de Naga University. Archived from the original on October 26, 2009. Retrieved 5 May 2014.{{cite web}}: CS1 maint: unfit URL (link)
December 18, 2023
subangdaku, river, largest, river, southern, leyte, philippines, drains, into, sogod, municipality, sogod, river, name, means, river, wide, river, cebuano, mouthshow, visayas, philippines, show, philippinesnative, namesubangdaku, cebuano, locationcountryphilip. The Subangdaku River is the largest river in Southern Leyte Philippines It drains into the Sogod Bay at the municipality of Sogod The river s name means big river or wide river in Cebuano Subangdaku RiverSubangdaku River mouthShow map of VisayasSubangdaku River Philippines Show map of PhilippinesNative nameSubangdaku Cebuano LocationCountryPhilippinesRegionEastern VisayasProvinceSouthern LeyteMunicipalitySogodPhysical characteristicsSource locationmountains of San Juan and San Francisco Mabuhay Sogod Southern LeyteMouthSogod Bay locationSogod Southern Leyte coordinates10 22 50 N 124 59 10 E 10 38056 N 124 98611 E 10 38056 124 98611 elevation0 m 0 ft Length23 km 14 mi For years following the flooding of the river it created an issue over the province It has been quarried and re channeled which caused the incidents After many attempts the issue remained unsolved Formation editBy 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 As such the river usually became hazardous during typhoon after a heavy rain 1 The river has been meandering its natural course The occurrence is being observed by natives living along the river every time a flood occurs Environmental issues editThe ecology of the Subangdaku River has been disturbed by human activity such as a noise such as those caused by grinding of rocks during quarrying operations b fragmentation of river system preventing travel of aquatic organisms through a continuous river channel c silt deposited in the bay which is facilitated by rechanneling activities The resulting fragmentation and siltation of Sogod Bay may have disturbed the life cycle of some organisms that require movement between the sea and the freshwater ecosystem such as Subangdaku For instance the behavior of a certain crab named locally as Kamwa has been reported by one of the local inhabitant who followed the crab upstream and found that the path the young traveled from the sea to upstream of Subangdaku reached until Barangay San Juan about 120 metres 390 ft above sea level The behavior of this crab was that the adult laid eggs in the sea and when the eggs are hatched the baby crabs traveled upstream Other species observed and or reported downstream were Katang Ulang freshwater shrimp a small mollusk a gastropod having some spines on its shell locally known as Odianga and two kinds of freshwater fishes 1 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 The extraction of sand and gravel weakens the river bed and makes the river 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 A 1994 study by Silliman University identified sand and gravel mining rechanneling and sand harvest near the river s mouth as causes of degraded habitats and major water quality issues of the area The same report mentioned mining as one of the harmful practices that Sogod Bay should be protected from and it recommended regulating quarrying and rechanneling with competent planning based on scientific evidence and monitoring as a way to protect the Subangdaku River 1 References edit a b c Emelina G Regis March 21 2002 Stop Quarrying and Rechanneling Subang Daku of Sogod Southern Leyte Subang Daku Issue Ateneo de Naga University Archived from the original on October 26 2009 Retrieved 5 May 2014 a href Template Cite web html title Template Cite web cite web a CS1 maint unfit URL link Retrieved from https en wikipedia org w index php title Subangdaku River amp oldid 1094270789, wikipedia, wiki, book, books, library,
