A physically-based model for simulating runoff of lagawe river sub-watershed, ifugao, Philippines

Issue Date

6-2020

Abstract

A dynamic, physical model was created to simulate runoff of Lagawe River Sub-watershed. A tipping-bucket rain gauge was installed to gather event-based rainfall data and a water-level recorder was installed on a straight segment of Lagawe River to gather water depth. Land use/land cover data was derived from the image classification of Landsat data. Elevation, slope, and local drainage direction maps were generated from digital elevation model using GIS processing techniques. Manning’s equation was utilized to model the velocity of runoff. The maps, rainfall, and water-level data served as input to the physical, dynamic model, which was written using PCRaster language. An R2 of 0.82 was achieved between the correlation of the measured and predicted streamflow. Also, the t-statistic showed no significant difference between the measured and predicted streamflow. Based on the statistical analyses and indices, the dynamic, physical model was able to simulate runoff and predict streamflow.

Source or Periodical Title

Journal of the International Society for Southeast Asian Agricultural Sciences

ISSN

0859-3132

Volume

26

Issue

1

Page

132-144

Document Type

Article

College

College of Agriculture and Food Science (CAFS)

Physical Description

illustrations; graphs; tables; references

Language

English

Subject

GIS, Ifugao, Lagawe, Landsat, PCRaster, Remote sensing

Digital Copy

yes

En – AGROVOC descriptors

PCRASTER; GIS; REMOTE SENSING; LAGAWE, IFIGAO; AND LANDSAT

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