For example, Xu et al.
(2004) found a strong relationship existing
between ENSO and rainfall in the Mae Klong and
Ping River Basins, while Singhrattna et al. (2005)
showed a significant relationship among those
variables during the post-1980 period. In contrast,
Otarig (2000) reported that there was no
correlation between El Nino and rainfall over
Thailand.