2.0
2.1
THE PHYSICAL ENVIRONMENT Geography, Location and Area The city of Pasay is located in the western coast of Metro Manila or the National Capital Region (NCR). It is bounded in the north by the city of Manila, in the northeast by the city of Makati and the municipality of Taguig, in the west by the city of Paranaque, and in the west by the Manila Bay (See Figure 2.1). The city is located approximately at latitude 14º32' and longitude 121º00'. In terms of area, Pasay is the third smallest political subdivision among the cities and municipalities of NCR. The area distribution of the city per Barangay is shown in Table 2.1.
Table 2.1 Area Distribution (in Hectares)
Brgy. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 48 Area 1.48 4.37 1.84 2.89 1.53 1.47 2.58 1.94 1.43 2.99 1.82 1.89 13.95 2.48 3.61 1.30 1.69 4.61 1.10 2.25 1.78 0.56 4.14 2.44 2.16 1.86 1.90 3.82 1.88 1.18 2.80 2.97 5.88 2.93 3.56 4.43 4.56 8.40 5.53 5.53 4.20 2.66 1.69 5.94 2.73 3.90 1.80 Percent to Total (%) 0.08 0.24 0.10 0.16 0.08 0.08 0.14 0.11 0.08 0.17 0.10 0.10 0.77 0.14 0.20 0.07 0.09 0.26 0.06 0.12 0.10 0.03 0.23 0.14 0.12 0.10 0.11 0.21 0.10 0.07 0.16 0.16 0.33 0.16 0.20 0.25 0.25 0.47 0.31 0.31 0.23 0.15 0.09 0.33 0.15 0.22 0.10 Brgy. 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 98 Area 2.26 2.37 1.01 1.94 2.25 1.01 0.91 4.31 3.79 3.55 0.40 0.49 2.18 1.15 4.45 2.81 1.83 1.56 1.24 6.12 1.02 1.47 6.06 3.30 9.34 50.45 4.22 3.33 4.20 2.64 1.62 0.71 2.11 1.31 3.88 1.56 1.22 3.19 1.24 2.00 1.73 2.28 2.79 2.91 2.51 2.26 4.39 Percent to Total (%) 0.13 0.13 0.06 0.11 0.12 0.06 0.05 0.24 0.21 0.20 0.02 0.03 0.12 0.06 0.25 0.16 0.10 0.09 0.07 0.34 0.06 0.08 0.34 0.18 0.52 2.79 0.23 0.18 0.23 0.15 0.09 0.04 0.12 0.07 0.22 0.09 0.07 0.18 0.07 0.11 0.10 0.13
References: used for this purpose include materials from the local government, BSWM, and PHIVOLCS. Some of the environmental concerns such as flooding, drainage, river preservation, liquefaction hazard, and industrial zones were reflected in maps and discussed briefly. These are subsequently used to delineate the areas of various degrees of development suitability. Flood Hazard Areas Besides natural factors, other aspects that tend to aggravate flooding problems in Metro Manila include the following: Infrastructure development leading to the creation of more impervious areas, resulting to higher peak run-offs that usually cause standing floods; Inadequate or non-existent drainage system; Improper solid waste disposal that leads to the clogging of drainage systems, further lowering their water retaining capacity; Heavy siltation of rivers due to previous floods, indiscriminate dumping of garbage, encroachment of squatters and slum dwellers, and limited maintenance works; and Institutional problems and financial constraints which delay implementation of proper flood control measures. Flooding within Pasay City are generally concentrated along Taft Avenue and the areas along the Estero de Tripa de Gallina and Maricaban Creek (Figure 2.6). The Official Website of Pasay City www.pasay.gov.ph 11 COMPREHENSIVE LAND USE PLAN OF PASAY CITY SOCIO-ECONOMIC PROFILE River and Coastal Preservation As shown in Figure 2.7, the following are the river preservation zones of the city: • Rivers and streams – These critical areas consist of easements of about 3 to 20 meters from both sides throughout the entire length of any river or stream. Areas within this range are subject to easement of public use in the interest of recreation, fishing, floatage, etc. Coastal Zone – This includes areas one kilometer from the coastline of the Manila Bay, which is city waters, and 200 meters from the coastline inland. • Areas of no significance - Areas outside the range mentioned above are nonenvironmentally-critical areas. Liquefaction Hazard Liquefaction is associated with the phenomenon of quick-condition failure which is generally obtained when pore water in a liquefied layer rises into overlying near-surface sediments that results in a condition resembling quicksand. Areas that are prone to liquefaction are those underlain by water-saturated, thick fine to coarse sand layers such as those along the Pasig River Delta Plain, lake shore areas of Laguna de Bay and the shorelines of Manila Bay. Figure 2.8 shows the city’s Liquefaction Hazard Map with potential zones classified into high, moderate and low based mainly on the presence of clay layers which help inhibit liquefaction. Industrial and Airport Zones The attribute features of this map are based on the constraints on acceptable noise and air pollution levels for developments around existing industrial establishments. These noise and air pollution levels conform with the DENR Guidelines (Figure 2.9). • Development restriction guidelines for various noise zones are: - from 45 to 55 dBA. Section of contiguous areas which are primarily used for residential purposes. - from 55 to 65 dBA. Primarily for commercial area - from 60 to 70 dBA. Reserved as a light industrial area - from 65 to 75 dBA. Primarily reserved as a heavy industrial area. Development restriction guidelines for various source-specific air pollutants, such as emission of dust, dirt or fly ash based on DENR standards.