The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Download
Publications Copernicus
Download
Citation
Articles | Volume XLVI-4/W6-2021
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLVI-4/W6-2021, 71–76, 2021
https://doi.org/10.5194/isprs-archives-XLVI-4-W6-2021-71-2021
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLVI-4/W6-2021, 71–76, 2021
https://doi.org/10.5194/isprs-archives-XLVI-4-W6-2021-71-2021

  18 Nov 2021

18 Nov 2021

A TIME-SERIES AND SPATIAL ANALYSIS OF 56 YEARS (1961–2017) OF RAINFALL HISTORICAL DATA FROM MALAYBALAY, BUKIDNON

B. J. Buenaobra1, M. K. L. Alleto2, and J. M. V. Manhuyod1 B. J. Buenaobra et al.
  • 1Plantation Geomatics Dept., Del Monte Philippines Inc., Agusan Canyon, Manolo Fortich, Bukidnon, Northern Mindanao, Philippines
  • 2Crop Production Unit, Del Monte Philippines Inc., Agusan Canyon, Manolo Fortich, Bukidnon, Northern Mindanao, Philippines

Keywords: Time Series Analysis, Rainfall Density, Rainfall Seasonality, Autocorrelation, Stationarity

Abstract. This paper focuses on using time series and spatial analysis methods to detect climate change indicators in Malaybalay, Bukidnon. We look at 56 years of historical rainfall data between the years 1961 to 2017 and perform a computational method for data processing to arrive at spatial statistics and provide data visualization. We demonstrate the use of the Augmented Dickey-Fuller test (ADF), where a p-value is tested versus a threshold to reject or accept the null hypothesis for a stationarity test. For the seasonality test, we perform a time-domain signal processing by an autocorrelation function. The time-series analysis shows that for Malaybalay, Bukidnon rainfall data shows ADF statistic of −16.348964, a p-value = 0.000000 with critical values 1%:−3.431, 5%:−2.862, 10%:−2.567. Hence, the significant negative values indicate more likely to reject the null hypothesis. We showed that rainfall does not demonstrate periodicity, is not seasonal, and is non-stationary. This work does not cover those that can be detected and attributed to anthropogenic causes.