Mekong - balanced

Looking at this picture I get the same feeling which I had while sitting there on the banks, looking to the boats passing and to the lotos drifting by...........
it's very strange and leads to some disorientation, that the lotos is drifting upwards the river to the cambodian border....???.....why, what, am I drunk? No, the Mekong has tides far up from sea, which let him flow into the wrong direction....!