Impact of Urbanization to the Rainfall pattern in Metropolitan Manila
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Date
2023
Authors
Danver C. Manuel
Hannah Gazel D. Eugenio
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Abstract
Urbanization is caused by an increase in the size and density of built-up areas, Environmental degradation has been occurring at a rapid pace as a result of uncontrolled urbanization that causes, numerous problems in an area. Urbanization could have a significant impact on the surface energy budget and further influence the local atmospheric conditions.
This study assessed the impact of urbanization to the rainfall pattern in Metropolitan Manila. The population density data were used to determine the early- and post-urbanization period in Metro Manila, as well as, to determine a nearby rural area which is the basis for assessing the impact of urbanization. On the other hand, 57 year annual rainfall from the Asian Precipitation-Highly-Resolved Observational Data Integration Towards Evaluation of Water Resources (APHRODITE) was used to quantify, and investigate the effect of urbanization on rainfall using spatiotemporal analysis. A statistical method was also used to measure the modulation of urbanization on daily rainfall. The statistical significance of the results was tested using correlation analysis, Mann Kendall trend test, and two sample independent t-test.