Spatial and Temporal Variations of Rainfall in Cagayan Province

Authors

  • Melanie Dizon Aquino College of Engineering, Isabela State University, Philippines
  • Bonifacio T. Ausa College of Engineering, Isabela State University, Philippines
  • Dr. Orlando F. Balderama College of Engineering, Isabela State University, Philippines
  • Dr. Editha F. Ausa College of Engineering, Isabela State University, Philippines

Keywords:

Cagayan, Cropping Calendar, Cropping Pattern, Rainfal, Spatial, Temporal

Abstract

This study was conducted in order to provide information to the policy makers and farmers on the long- term variations
of rainfall as affected by space and time in the province of Cagayan. The rainfall data obtained from the 4 rain gauge
stations were tested using double mass curve analysis and were found out to have consistent trends. Tuguegarao
Station covered the largest area which is 47.32% and Laoag had the least areal extent of 1.07%. The weighted average
depth of annual rainfall at 80% dependability in Cagayan was 1450.53 mm. The optimal number of stations that
should exist in the province to be used in estimating the annual rainfall at 10% allowable estimation of error is 2. On
the other hand, the minimum length of rainfall record that could provide acceptable and reliable results of analysis
related to spatial and temporal variations of rainfall on annual basis is 8 years. Elevation is insignificantly related to
rainfall. Wet season starts from June and ends in January while dry season begins from February and ends in the
month of May. The regression models developed can be used to predict rainfall data between the stations involved;
however these model equations can only be used to estimate the rainfall values within the range of rainfall values
used in this study. There were significant differences in the spatial and temporal distributions of rainfall in the
province of Cagayan.

Author Biographies

Melanie Dizon Aquino, College of Engineering, Isabela State University, Philippines

Engr. Melanie D. Aquino is a faculty of the
College of Engineering. Prior to her teaching career,
she was involved in different research projects of
Isabela State University.

Bonifacio T. Ausa, College of Engineering, Isabela State University, Philippines

Engr. Bonifacio T. Ausa, senior faculty of
the College of Engineering. Engr. B.T. Ausa served as
Department Chairman of the BSAE for several years,
as well as adviser of PSAE. He earned his MS degree
in UPLB and served as thesis adviser for students both
in undergraduate and graduate levels.

Dr. Orlando F. Balderama , College of Engineering, Isabela State University, Philippines

Dr. Orlando F. Balderama is the Vice
President of Research, Development, Extension and
Training at Isabela State University. He finished his
PhD in Agricultural Engineering in Japan. He is
devoted to research and was able to publish different
research papers to different journals/publications.

Dr. Editha F. Ausa, College of Engineering, Isabela State University, Philippines

Dr. Editha F. Ausa served as Vice President
for Academic and Related Affairs. She authored
different research papers and served as panelist to
different research studies conducted by students in the
undergraduate and graduate levels.

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Published

2021-02-18

Issue

Vol. 1 No. 1 (2020): The Journal of Engineering Applications

Section

Articles