The Tunasan River ( tl, Ilog ng Tunasan), also referred to as the Tunasan-Cuyab River, is a river system in the
Philippines
The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no),
* bik, Republika kan Filipinas
* ceb, Republika sa Pilipinas
* cbk, República de Filipinas
* hil, Republ ...
. This river begins in
Dasmariñas,
Cavite
Cavite, officially the Province of Cavite ( tl, Lalawigan ng Kabite; Chavacano: ''Provincia de Cavite''), is a province in the Philippines located in the Calabarzon region in Luzon. Located on the southern shores of Manila Bay and southwest ...
, and ends at the border of
Muntinlupa
Muntinlupa, officially the City of Muntinlupa ( fil, Lungsod ng Muntinlupa), is a 1st class Cities of the Philippines#Legal classification, highly urbanized city in the Metro Manila, National Capital Region of the Philippines. According to the ...
, and
San Pedro, Laguna
San Pedro, officially the City of San Pedro ( fil, Lungsod ng San Pedro), is a 3rd class component city in the province of Laguna, Philippines. According to the 2020 census, it has a population of 326,001 people.
It is named after its patron ...
. It is one of 21 major
tributaries
A tributary, or affluent, is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drainag ...
of
Laguna de Bay.
The river system has six adjoining creeks:
* There are two in
San Pedro, Laguna
San Pedro, officially the City of San Pedro ( fil, Lungsod ng San Pedro), is a 3rd class component city in the province of Laguna, Philippines. According to the 2020 census, it has a population of 326,001 people.
It is named after its patron ...
and Dasmariñas, Cavite
* Three creeks joins the system from the ponds of The Filipinas Golf Club, and
* The last one connects from the drainage system of RMT Complex.
The depth of the Tunasan currently varies from .
Both the river and barangay Tunasan got their names from a medicinal plant locally called tunas (
Nymphaea nouchali
''Nymphaea nouchali'', often known by its synonym ''Nymphaea stellata'', or by common names blue lotus, star lotus, red water lily, dwarf aquarium lily, blue water lily, blue star water lily or manel flower, is a water lily of genus '' Nympha ...
) which was abundant on the Tunasan River and the shoreline of Laguna de Bay.
The Tunasan River received media attention in 1994 and 1995 due to a series of "
fish kills" caused by the high
Biochemical Oxygen Demand
Biochemical oxygen demand (BOD) is the amount of dissolved oxygen (DO) needed (i.e. demanded) by aerobic biological organisms to break down organic material present in a given water sample at a certain temperature over a specific time period. ...
from decomposing
water lilies
''Water Lilies'' (or ''Nymphéas'', ) is a series of approximately 250 oil paintings by French Impressionist Claude Monet (1840–1926). The paintings depict his flower garden at his home in Giverny, and were the main focus of his artisti ...
, and by the profusion of residential wastes that find their way into the river during the rainy season.
See also
*
Laguna Lake Development Authority
The Laguna Lake Development Authority (LLDA), one of the attached agencies of the Department of Environment and Natural Resources (DENR), is responsible for the preservation, development, and sustainability of Laguna de Bay (Laguna Lake) and its ...
*
List of rivers and esteros in Manila
References
Rivers of Metro Manila
Rivers of the Philippines
Tributaries of Laguna de Bay
Landforms of Laguna (province)
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