The problem arises when these flows are inundated with rain runoff and the inevitable happens, in coastal areas, when the floods are drained into the sea, or in urban areas into local rivers.
The problem arises when these flows are inundated with rain runoff and the inevitable happens, in coastal areas, when the floods are drained into the sea, or in urban areas into local rivers. This is of course a Thai-wide phenomenon because the country has not rated the separation of sewage from storm drainage as a priority in the urban environment.