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Philippines: 1. General description of why an area is selected Pangasinan and Laguna provinces were selected for the second phase monitoring because: a. they are agricultural areas b. there is extensive aquaculture activities in these areas c. there is contrasting river system and agricultural and aquaculture activities in the areas Pangasinan and Laguna were selected as study areas because of the contrasting characteristics of the agricultural activities and fish farming activities because of their different natural topography and river systems. It would be interesting to see the residual OCPs in the river systems and to possibly relate these pollution to the OCPs of the fish grown in the two areas. 2. Specific description of the location Pangasinan is one of the provinces in Central Plain of Luzon, the major producer of the country's rice supply. The topography of Pangasinan (plains adjacent to a valley) and abundance of water supply make it a good place for large scale rice and vegetable production. Some parts of Pangasinan are coastal areas and three major rivers that meet the Lingayen Gulf provide large estuarine areas that make the coastal towns of Lingayen, Dagupan and Binmaley major suppliers of cultured fish in Luzon. The Agno River and Bued River which originate from the nearby Mountain Province created a network of river tributaries across the whole province of Pangasinan before ending up in the Lingayen Gulf. Pangasinan's river system is a good monitoring area for OCPs because the rivers are wide and river flow could carry OCPs not only from Pangasinan but also from the neighboring agricultural lands in La Union and Mountain Province with higher altitudes. Laguna is the first province south of the Greater Manila Area. The province lies at the foot of Mount Makiling, a small mountain range that practically surrounds the province. Laguna Lake, the country's biggest lake catches the run-off from Mount Makiling and from the watershed of the neighboring province of Rizal which is also at the foot of another mountain range, the Mount Banahaw. The river system in Laguna consists of small river tributaries originating from the upland springs and streams. The water of the river system run through small farmlands and drain into Laguna Lake. Most of the farmlands are situated on the eastern side of the lake. Laguna Lake is an important source of livelihood for fish farmers in Laguna. 3. Geographic coordinates of the sampling locations The geographic coordinates of the locations will be specified later. 4. Sampling plan Seven sampling points are selected in each province. Surface and sediment samples will be collected from each site. The samples will be analyzed for OCPs. Figures 2a and 2b show the sampling points in Pangasinan. Sites 1 and 2 are in the tributary of Agno River in Urbiztondo and in Lingayen towns ; sites 3 and 4 are in the tributary of San Pablo River in Calasiao and Dagupan towns and sites 5, 6 and 7 are in the tributaries of Bued River in Embarcadero, San Vicente and Mapandan towns. Figure 2c shows the sampling points in Laguna. The river system to be studied is located on the north eastern shore of Laguna Lake. Sites 1, 2 and 3 are in river tributaries in Morong, Tanay and Pililia towns, sites 4, 5 and 6 are in Mabitac, Famy and Pangil towns. Site 7 is in the town of Santa Cruz on the southeastern part of the lake. 5. Country and specific area of maps Figure 1  Figure 2a 
Figure 2b 
Figure 2c  |
