Hydrologic modelling and estimation of flood volume excess with varying durations using HEC-HMS of San Juan River, Metro Manila, Philippines

Date

6-2015

Degree

Bachelor of Science in Civil Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Jonathan David D. Lasco

Abstract

Flooding is one of the most common natural disasters in the Philippines. It usually occurs in densely populated areas and major river systems throughout the country and causes severe damages to the properties and lives of people. San Juan River is one of the most frequently flooded river systems in the Philippines. It is then vital to analyze the hydrologic processes of the river for formulation of flood control measures. A hydrologic model of the river was generated trough HEC-HMS using the SCS Curve Number, NRCS rainfall-runoff relationship, Clark's Unit Hydrograph, and Muskingum-Cunge Method. In estimating the discharges in the river, flow hydrographs were generated through the HEC-HMS model simulation for nine storm durations, having SCS Type II temporal distribution , for six corresponding return periods. The general hydrologic model was validated through the research conducted by the UPTCAGP. The results showed that the flooding at the outlet of San Juan River is severe, amounting to a maximum of 65.3 million m³ and a minimum of 9 million m³. The relationship of the flood volume excess to the storm duration was determined to be Shifted Power Model through Curve Expert Professional simulation. The equation and the derived coefficients can be used in estimating the design volume, base on duration and return period, of the optimized water control resources for the river system.

Language

English

Location

UPLB College of Engineering and Agro-Industrial Technology (CEAT)

Call Number

LG 993.5 2015 E63 /S26

Document Type

Thesis

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