FIELD SURVEY ON THE FLOW STRUCTURE AND WATER QUALITY OF PASIG RIVER IN METRO MANILA

Field survey was conducted in Pasig River flowing through Metro Manila, the national capital region of the Philippines in order to get the basic information about flow and water quality for the future planning of river environmental management. Salinity, water temperature, DO, Turbidity, and Chl-a were measured with a water quality meter every 1km or 2km along the channel center line in the reach of 25km between Manila Bay and Laguna de Bay. The spatial structure of flow and water quality in the reach are estimated from these data. BOD was analyzed for water sampled at several stations. The rate of BOD load and the pollutant runoff coefficient are also roughly estimated.