Open AccessThe projected water availability on paddy rice based on climate change scenario in Indonesia
Author(s) -
Misnawati Misnawati,
Yayan Apriyana,
Fadhlullah Ramadhani
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/648/1/012162
Subject(s) - evapotranspiration , environmental science , climate change , agriculture , cropping , crop , water resources , rainwater harvesting , water balance , water resource management , hydrology (agriculture) , geography , forestry , ecology , geotechnical engineering , archaeology , engineering , biology
Climate change is a crucial issue concern in this century. The increase in temperature and changes in rainfall has a substantial effect on the agricultural sector. This study investigates the impact of climate change on water availability and crop evapotranspiration (ETc) in seven locations. The historical data (1981-2005) and The GCM data (ACCESS1-0) for the CMIP5 project for 45 years (2006-2050) under RCP 4.5 and RCP 8.5 scenarios were used to analyze the trend of temperature, rainfall, crop evapotranspiration, and changes in water availability using The Mann-Kendall test. In this study, crop evapotranspiration is calculated to assess monthly crop water requirement, while deficit rainfall is using to calculate the water deficit on paddy rice. This study shows that the temperature and crop evapotranspiration have a significant positive trend under historical, RCP 4.5, and RCP 8.5 scenarios. Otherwise, rainfall shows a relatively decreasing trend for historical RCP 4.5 and RCP 8.5 scenarios. Crop water requirement is projected to increase in the future. Rainwater would insufficient to crop water requirements in a certain month. Shifting the planting time and adjusting the cropping pattern is a strategy to adapt and mitigate climate change.