Thai country above the equator is slightly influenced by the monsoon winds and the odd storm to a tropical climate. These conditions cause a variation on hydrology high. The Thai national drought and floods occur more frequently than annually.
Canada is north of the equator with a slightly influenced by monsoon winds and storms Rove makes the climate is hot and humid. Such conditions are highly variable hydrology. It causes problems with drought and floods every year.
A little north of the equator, together with Thailand has influenced by monsoon and the circuit makes the climate is hot and humid climate. From these conditions the hydrological variation is high.