what are they building in the canal?

this construction has kept me wondering. what are they building in the canal and what is its purpose?

looking at the pictures, can you guess the purpose of this structure across the bed of the canal.

the level of the water in this canal is not directly affected by the tides. most of the time the water flows along a shallow channel in the middle of the canal (the darker patch in the 1st and 3rd pictures). the water level goes up only after some continual rain or a heavy downpour.

before they started construction on this, i was not aware that there are fishes (of two different species) of about 12cm long in the water of the canal. it was only when the water was held back slightly and its level rose that i noticed the fish.

since chun see has answered the question on behalf of victor, i am showing the photo of the net that they secured to one of the outlets. over the weekend, the net has been filled to capacity.

did they build this so that the fish can have a race, taking up position behind the 12 holes, when the water level is high?


in these hard times, to make it easier for poor people like me to catch the fish?


to trap the flotsam and jetsam that is making its way to the sea along this canal?


to make the canal look a little bit aesthetically pleasing?

maybe you can think of other reasons for the building of this structure.