METHODOLOGY
a. The construct of spatial annual rainfall
The ArcGIS 9.3 was used for interpolation of annual
rainfall with the Kriging Method (Thavorntam et al., 2007)
[16] to cover the studied areas. It presents the distribution of
the spatial annual rainfall in the Northeast from 2001-2010.
b. Relationship between annual rainfall and ocean index
analysis
Linear regression was used to analyze the relationship
between the annual rainfall and the ocean index as the IMI and
WNPMI of the summer monsoon, DMI of the Indian Ocean
Dipole or IOD and MEI of El Niño-Southern Oscillation or
ENSO (Krusreesakul, 2009) [17]. It presents the correspond
and trend of climate variability or climate change in the
Northeast from 1996–2010.
c. Corresponding of flooding a annual rainfall and ocean
indices analysis
The analysis of flooded areas was correspond as both
statistics and distributed of spatial annual rainfall, and the ocean indices as IMI and WNPMI of the summer moonsom,
DMI of the Indian Ocean Dipole (IOD) and MEI of El Niño-
Southern Oscillation (ENSO). It presents extreme of flooded
were affected by climate variability or climate change from
2001–2010 in the Northeast.