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Table of Contents
Volume 1. Marikina Sub-basin ..................................................................................... 3
Geographic Location .............................................................................................................. 3
Political and Administrative Coverage ..................................................................................... 4
Land Cover ............................................................................................................................. 5
Drainage Network ................................................................................................................... 7
Sub-basin Characterization and Properties ......................................................................... 7
Sub-sub basin Properties ...................................................................................................10
Water Quantity ......................................................................................................................10
Stream Flow ......................................................................................................................10
Water Balance ...................................................................................................................11
LIST OF FIGURES
Figure 1-1 Geographical Map ............................................................................................................... 3 Figure 1-2 Political Jurisdiction ............................................................................................................. 5 Figure 1-3 Land Cover Map .................................................................................................................. 6 Figure 1-4 Drainage Map ...................................................................................................................... 8 Figure 1-5 Sub-sub basin Map of Marikina Sub-basin .......................................................................... 9 Figure 1-6 Stream Flow for the Marikina Sub-basin, 1990-2004 ........................................................ 11 Figure 1-7 Water Balance Percentage (1990-2004) ........................................................................... 12
LIST OF TABLES
Table 1-1 Geographic extent ................................................................................................................. 4 Table 1-2 Covered Municipalities and Barangays ................................................................................ 4 Table 1-3 Population Distribution by Municipality/City, 2007 ................................................................ 4 Table 1-4 Landcover Classification and Distribution ............................................................................. 6 Table 1-5 Some Relief Features and Other Geo-Morphological Parameters ....................................... 7 Table 1-6 Marikina Sub-sub basin properties ..................................................................................... 10 Table 1-7 Yearly Water Balances based on model simulation (mm) .................................................. 11
Technical writer
For. Alvin A. Faraon, LLDA-PDMED
Technical editors Ms. Adelina C. Santos-Borja Officer-In-Charge Resource Management and Development Officer
Engr. Emiterio C. Hernandez Officer- In Charge Project Development Management and Evaluation Division
Map production
Mr. Neil V. Varcas, LLDA-PDMED
Volume 1. Marikina Sub-basin
Geographic Location The Marikina Sub-basin encompasses the cities of Antipolo, Marikina, Pasig, and Quezon and the municipalities of San Mateo and Rodriguez, province of Rizal (Figure 1-2). The total area of the sub-basin is about 48,828.12 hectares majority of which covers Rodriguez followed by the City of Antipolo (Table 1-1). The center of the sub-basin defined by coordinates 121°12”14 E and 14°40”17” N.
Source: LLDA GIS (produced using data from SDLBE project, 2000, watershed delineation processed from SRTM3 DEM collected in February 2000 by NASA)
Figure 1-1 Geographical Map
Table 1-1 Geographic extent
CORNERS NORTHING (UTM) EASTING (UTM)
Upper Left 1610233.75000 319835.55351
Upper Right 1610233.75000 291073.64698
Lower Right 1640934.90965 291073.64698
Lower Left 1640934.90965 319835.55351 Source: LLDA GIS Unit
Political and Administrative Coverage Rodriquez occupies the largest area in the sub-basin (36.15%) covering 11 barangays while the Pasig City has the smallest at 2.13% comprising 20 barangays. Almost thirty-five percent of the total watershed area is covered by Antipolo City. On the other hand, Marikina, Tanay, Quezon City, and San Mateo occupy 3.29%, 7.05% and 12.38%, respectively (Figure 1-2) The table below presents all municipalities within the Marikina sub-basin and their corresponding land areas.
Table 1-2 Covered Municipalities and Barangays
Source: LLDA GIS Unit
Per the 2007 census, the total population of the sub-basin is about 1,579,647. Although only the easternmost portion of Quezon City is part of the sub-basin, it accounted for the largest population share of 40.36 percent or 637,594 in view of the fact that it is the most populated city in the country. On the other hand, Tanay had the least share of 0.09 percent being the least populated of the LGUs which are part of the sub-basin (Table 1-3). There were 328,131 households within the sub-basin with an average household size of 4.72. Marikina City had the highest average household size of 4.84 while Pasig City had the lowest with 4.56.
Table 1-3 Population Distribution by Municipality/City, 2007
National Statistics Office, 2007 Census of Population
Municipality/City Number of Barangays Covered Area (ha) Percentage
Antipolo 9 17036.15 34.89
Marikina 13 1519.02 3.11
Pasig 20 1040.20 2.13
Quezon City 23 3260.97 6.68
Rodriguez 11 17649.76 36.15
San Mateo 15 5724.39 11.72
Tanay 3 2597.639 5.320
Total 94 48828.12 100.00
Municipality/City Population Percentage
Antipolo 175405 11.10
Marikina 240535 15.23
Pasig 136149 8.62
Quezon City 637594 40.36
Rodriquez 205244 12.99
San Mateo 183309 11.60
Tanay 1411 0.09
Total 1579647 100.00
Source: LLDA GIS (produced using data from SDLBE project, 2000, watershed delineation processed from SRTM3 DEM collected in February 2000 by NASA)
Figure 1-2 Political Jurisdiction
Land Cover There are ten classes of land cover in the Marikina Sub-basin: urban, forest, arable, plantation, grassland, brushland, marsh, water, cloud, unclass (Table 1-4). Based on GIS analysis, grassland and brushland areas pre-dominate the sub-basin area with 14236.71 hectares or 25.97% and 13159.74 hectares or 24.01%. Forested areas are about 7638.14 or 13.9% while urban/built-up areas are about 9505.37 hectares or 17.35%. The remaining landcover are arable, plantation, marsh and water/marsh areas. Patches of forest cover is found in the uplands of Barangays Puray and parts of Barangays Mascap, San Rafael, and Burgos in Rodriguez and also parts of Barangays San Jose and Calawis in Antipolo City. Built-up areas are dominant in the middle and western lowlands of the sub-basin. Grasslands are found in Barangays San Jose and Calawis in Antipolo City Barangays san Rafael, Puray, and Rosario in Rodriguez. Figure 1-3 show the land cover map.
Source: LLDA GIS (Processed from SPOT5 2003, re-validated/groundtruthed in year 2010)
Figure 1-3 Land Cover Map
Table 1-4 Landcover Classification and Distribution
Land Cover Area (ha) Percentage
Urban 9505.373 17.3456
Forest 7638.132 13.9382
Arable 2510.032 4.5803
Plantation 7554.101 13.7848
Grassland 13159.74 24.0141
Brushland 14236.71 25.9794
Marsh 0.59 0.0011
Water 169.352 0.3090
Cloud 1.251 0.0023
Unclass 24.755 0.0452
Total 54800.03 100.00 Source: LLDA GIS Unit
Drainage Network Sub-basin Characterization and Properties The drainage map of the Marikina Sub-basin is shown in Figure 1-4 while the important watershed characteristics and geomorphological features are in Table 1-5.
Table 1-5 Some Relief Features and Other Geo-Morphological Parameters
Source: LLDA GIS Unit
Parameters Values
Area (ha) 54,325.624
Perimeter (m) 14,3794.246
Total number of streams 331
Total length of streams (m) 53,5383.540
Stream Density (stream/ha) 0.00609
Drainage Density (m/ha) 9.8551
Constance of Channel Maintenance (ha/m) 0.1015
Length of Overland Flow (m) 4.9275
Source: LLDA GIS (produced using data from SDLBE project, 2000, watershed delineation processed from SRTM3 DEM collected in February 2000 by NASA)
Figure 1-4 Drainage Map
Source: LLDA GIS (produced using data from SDLBE project, 2000, watershed delineation processed from SRTM3 DEM collected in February 2000 by NASA)
Figure 1-5 Sub-sub basin Map of Marikina Sub-basin
Sub-sub basin Properties
Table 1-6 Marikina Sub-sub basin properties
Sub-sub basin Name Area (Ha) Perimeter (m)
SSB-1A 800.293 19474.213
SSB-1AA 915.667 17002.672
SSB-1B 1254.132 20955.313
SSB-1BB 216.844 6423.645
SSB-1C 824.482 13296.737
SSB-1CC 1393.373 21634.442
SSB-1D 546.436 13386.578
SSB-1DD 1280.193 21641.603
SSB-1E 182.031 6068.679
SSB-1EE 256.036 7711.977
SSB-1F 252.408 7892.990
SSB-1FF 599.159 12401.623
SSB-1G 1236.525 19669.964
SSB-1GG 758.663 15648.275
SSB-1H 7825.943 50556.255
SSB-1HH 3623.350 36315.974
SSB-1I 4013.539 44546.601
SSB-1J 1054.860 19891.954
SSB-1K 844.517 20963.080
SSB-1L 1053.117 17202.123
SSB-1M 255.265 7887.354
SSB-1N 828.901 18902.871
SSB-1O 1994.617 24655.127
SSB-1P 1420.208 18379.762
SSB-1Q 10633.760 134292.479
SSB-1R 344.100 7743.323
SSB-1S 3312.019 30147.403
SSB-1T 644.942 13599.126
SSB-1U 415.587 8959.413
SSB-1V 1934.703 21153.145
SSB-1W 589.388 13573.804
SSB-1X 2095.785 20266.402
SSB-1Y 170.505 5992.967
SSB-1Z 754.711 15700.703 Source: LLDA GIS Unit Water Quantity Stream Flow The mean average stream flow of Marikina River Basin from 1990-2004 is 33.91551 cu m/s. The maximum average stream flow was recorded in year 1999 amounting to 51.45392 cu m/s while the minimum stream flow was accounted in year 2004 with only about 26.03008 cu m/s. The Stream Flow of Marikina River Basin (1990-2004) is presented in Figure 1-6.
Source: LLDA PDMED
Figure 1-6 Stream Flow for the Marikina Sub-basin, 1990-2004
Water Balance The Sacramento Soil Moisture Accounting (SAC SMA) Hydrologic Model is used to simulate
watershed rainfall-runoff relationship and to generate the long-term water balance of the 24 sub-
basins of Laguna de Bay. The SAC SMA accounts for all water entering, stored in, and leaving
a drainage basin. Though many parameters are used in this water balance accounting process,
precipitation has the main impact on runoff.
For Marikina River Basin, the long term water balances of the basin based on the hydrologic
simulation is shown in the table belowError! Reference source not found.. The 15-year
average would show that 60.10% of the total rainfall becomes surface run-off, and about
26.20% of rainfall is lost as actual evapotranspiration. The base flow component of the total run-
off is quite minimal, with only about 12.7% of rainfall, while the remaining 0.90% is stored as soil
moisture and contributes to groundwater aquifer (Table 1-7).
Table 1-7 Yearly Water Balances based on model simulation (mm) YEAR Rainfall Actual Evapo-transpiration Direct Runoff Baseflow Change in Storage
1990 3,033 698 2,007 445 (117)
1991 2,417 634 1,557 273 (48)
1992 2,381 621 1,426 258 77
1993 2,296 579 1,281 297 139
1994 2,342 764 1,304 352 (79)
1995 2,629 625 1,504 342 158
1996 2,350 798 1,253 348 (49)
1997 2,100 692 1,181 312 (85)
1998 2,719 589 1,589 272 268
YEAR Rainfall Actual Evapo-transpiration Direct Runoff Baseflow Change in Storage
1999 3,680 774 2,424 482 (1)
2000 3,639 784 2,406 433 16
2001 2,703 824 1,516 369 (5)
2002 2,857 692 1,799 317 49
2003 2,439 677 1,473 298 (9)
2004 2,263 703 1,220 280 60
Average 2,657 697 1,596 339 25 Source: LLDA PDMED
Source: LLDA PDMED
Figure 1-7 Water Balance Percentage (1990-2004)