boat wreck on tonle sap

160 250 965 16000 alluvial area basin been cambodia collision considerably course culminate depression dry earlyoctober end eurasian floodplain geological has indian induced km2 km3 krong lacustrine lake lakes lateapril length lower lowest lying maximum mekong monsoons occupies peak plate plate56 precipitation reap sap season september siem size southwest tonle tonlé varies vast volume water which year