Table of Contents

Volume 3. Sub-Basin ...... 3 Geographic Location ...... 3 Political and Administrative Boundary ...... 4 Land Cover ...... 7 Sub-basin Characterization and Properties...... 8 Drainage Networks ...... 8 Sub-sub basin Properties ...... 10 Water Quantity ...... 11 Stream Flow ...... 11 Water Balance ...... 12

LIST OF FIGURES Figure 3-1 Geographical Map ...... 3 Figure 3-2 Political Map of (Angono Main) ...... 5 Figure 3-3 Political Map (Angono Talim) ...... 6 Figure 3-4 Land Cover Map ...... 7 Figure 3-5 Drainage Map ...... 9 Figure 3-6 Sub-sub basin Map ...... 10 Figure 3-7 Stream Flow, 1990-2004 ...... 12 Figure 3-8 Water Balances based on model simulation, 1990-2004 ...... 13

LIST OF TABLES Table 3-1 Geographic extent ...... 4 Table 3-2 Municipalities and Barangays Covered ...... 4 Table 3-3 Population Distribution by Municipality, 2007 ...... 4 Table 3-4 Area Distribution of Land Cover ...... 7 Table 3-5 Some Relief Features and Other Geo-Morphological Parameters ...... 8 Table 3-6 Angono Sub-sub basin properties...... 11 Table 3-7 Streamflow Data, 1990-2004 ...... 12 Table 3-8 Yearly Water Balances based on model simulation (mm)...... 13

Technical writer Engr. Cornelio O. Gamara, Jr., LLDA-PDMED

Technical editors Ms. Adelina C. Santos-Borja Engr. Emiterio C. Hernandez Officer-In-Charge Officer- In Charge Resource Management and Development Officer Project Development Management and Evaluation Division

Map production Mr. Neil V. Varcas, LLDA-PDMED

Volume 3. Angono Sub-Basin

Geographic Location The Angono sub-basin, lies between the west bay and central bay of the , spreads over the municipalities of Angono on the west, Cardona on the east, on the middle. Taytay on the northwest, on the north, Morong and Teresa on the northeast and on the south, southeast and southwest bounds the sub-basin with a total land area of about 8,691.051 hectares (Figure 3-1). The division of the Angono sub-basin into mainland and the makes it distinct from all the other sub-basins around Laguna Lake. The mainland consists of the municipalities of Angono and of the northern portions of Binangonan and Cardona while the Talim Island has Binangonan on the western side and Cardona on the eastern side.

Source: LLDA GIS Figure 3-1 Geographical Map

The geographic extent of the sub-basin is presented in Table 3-1.

Table 3-1 Geographic extent CORNERS NORTHING (UTM) EASTING (UTM) Upper Left 1580257.50000 312904.09375 Upper Right 1580257.50000 299585.46875 Lower Right 1611817.25000 299585.46875 Lower Left 1611817.25000 312904.09375 Source: LLDA GIS

Political and Administrative Boundary The Angono sub-basin covers 73 barangays located in six (6) municipalities located in the province of (Figure 3-2 and Figure 3-3). Binangonan is the largest municipality accounting for almost 50% (4,069.83 hectares) of the total area of the sub-basin as shown in Table 3-2. In view of barangays covered, Binangonan has the most with thirty nine (39), followed by Cardona with eighteen (18) barangays with an area of 2,367.97 hectares or 28.74% and Angono which comprises of ten (10) barangays with an area of 1,749.92 04 21.24%.

Table 3-2 Municipalities and Barangays Covered MUNICIPALITY NO. OF BARANGAYS AREA (HA.) PERCENTAGE (%) Angono 10 1,749.92 21.24 Binangonan 39 4,069.83 49.40 Cardona 18 2,367.97 28.74 Antipolo 3 30.16 0.37 Teresa 2 8.66 0.1 Taytay 1 12.21 0.15 TOTAL 73 8,238.75 100

The total population in the sub-basin area is 333,986 with Binangonan having 63.67% (212,649), Angono with 23.54% (78,642), and Cardona with 12.78% (42,695) as stipulated in Table 3-3