Mostly, annual rainfall had relationship with the ocean
indices as IMI and WNPMI of the summer monsoon, DMI of
IOD and MEI of ENSO. It represented to the ocean indices
can be explain variability of rainfall and flooding in the
Northeast from those relationship and correspond. Moreover,
It was found some the ocean indices were corresponded within
mean annual rainfall and flooded area, and some the ocean
indices were discrepant. However, the a variability of rainfall
and extreme of flooding in the Northeast are dependent on
several environmental dynamic factors and included climate
change. So the people in the Northeast should adapt to the
climate variability or climate change for sustainability of
natural resource and good wellbeing.