The Pasig River is technically a tidal estuary in that the flow direction depends upon the water level difference between Manila Bay and Laguna de Bay. During the dry season, the water level in Laguna de Bay is low and the flow direction of the Pasig River depends on the tides. During the wet season, when the water level of Laguna de Bay is high, flow is normally from Laguna de Bay towards Manila Bay.
The Pasig River used to be an important transport route in Spanish Manila. However, due to negligence and industrial development, the river has become very polluted and is considered dead (unable to sustain life) byecologists.
The Pasig River Rehabilitation Commission (PRRC) was established to oversee rehabilitation efforts for the river. Supporting the PRRC are private sector organizations i.e. Clean and Green Foundation, Inc. who implemented thePiso para sa Pasig (Filipino: A peso for the Pasig) campaign.
Pasig River winds generally north-westward for some 25 kilometres (15.5 mi) from the Laguna de Bay, the largest lake in the Philippines, to Manila Bay, in the southern part of the island of Luzon. From the lake, the river runs between Taguig City, and Taytay, Rizal, before entering Pasig City. This portion of Pasig River to the confluence with the Marikina River tributary is known as the Napindan River or Napindan Channel. From there, the river then forms the common border between Makati City to the south and Pasig City, followed by Mandaluyong City to the north. The river then sharply turns northeast forming the border between Mandaluyong and Manila before turning again westward, joining its other major tributary San Juan River, and then following a sinuous path through the center of Manila before emptying into the bay.
The whole river and most portions of its tributaries lie entirely within Metro Manila, the metropolitan region of the capital. Isla de Convalescencia ([pic]14°35′26″N 120°59′20″E), the only island dividing the Pasig River, can be found in Manila and it is where the Hospicio de San Jose is located.
Tributaries and canals
One major river that drains Laguna de Bay is the Taguig River, which enters into Taguig before becoming the Pateros River and forming the common border between the municipality of Pateros and Makati City. Pateros River then enters the same confluence where the Napindan River and Marikina River meet. The Marikina River is the larger of the two major tributaries of Pasig River and it flows southwards from the mountains of Rizal and cuts through the Marikina Valley. The San Juan River drains the plateau on which Quezon City stands; its major tributary is the Diliman Creek.
Within the city of Manila, there are various esteros or canals that criss-cross through the city and connect with Tullahan River in the north and Parañaque River to the south.
Another view of the Pasig from Intramuros, this time, showing the Jones Bridge and the Manila post office. There are a total of 13 bridges that cross the river. Crossing the Napindan Channel in Pasig City is the Bambang Bridge. Downstream is the C-5 Road Bridge connecting the cities of Makati and Pasig. The Guadalupe Bridge between Makati and Mandaluyong carries Epifanio de los Santos Avenue, the major highway of Metro Manila, as well as the Blue Line (Line 3) of the Metro Rail Transit (MRT). TheMakati-Mandaluyong Boundary Bridge is another bridge that connects the two cities downstream and forms the end of Makati Avenue. Sevilla Bridge connects Manila and Mandaluyong.
The easternmost bridge in Manila is the Lambingan Bridge in the district of Sta. Ana, followed by the Padre Zamora (Pandacan) Bridge...