THE IMPACT OF POSITIVE IOD AND LA NIÑA ON THE DYNAMICS OF HYDRO-CLIMATOLOGICAL PARAMETERS ON PEATLAND

Abstract

Peatlands in Indonesia are highly flammable during extremely dry seasons and are prone to flooding during extreme rainy seasons. This incident is related to the dynamics of the hydro-climatological parameters of the peatland. In 2019 the IOD+ phenomenon occurred which caused extreme drought and in 2020 there was a La Niña phenomenon that caused above-average rainfall. This study aims to determine and compare the dynamics of hydro-climatological parameters in the dry season during the 2018 normal climate, when there is IOD+ 2019, and when there is La Niña 2020. The data used are the results of in situ measurements by an integrated measurement system called SESAME and the measurement data of the MODIS satellite. The results of this study show that the rainfall and groundwater level during the IOD+ phenomenon in 2019 was lower than during the normal climate in 2018, while during La Niña in 2020 it was higher than during the normal climate in 2018. This study found a relationship that rainfall affecting groundwater level, and groundwater level affecting the number of hotspots, but their correlation is not significant. It is also found that hotspots can appear when the groundwater level reaches -0.65 m in West Kalimantan and -0.81 m in Central Kalimantan.