Back then the land is ok.. but as years gone by the river now flow with more water than last time as more and more development on the upstream

You answered your own questions

Back in early 70s the land is ok .. but then more and more new areas open up upstream and surrounding and causing issues

Whats the point on all the people saying its low lying area, or developers fault. Whats done is done. You want to bring them to justice now? Good. But first thing is to see what can be done about the problem to solve it. Going after the responsible party is secondary. 

After make noise during their first PC last week, the next day TNB come and check and pasang electric for the pump. From there you can see that in bukan masalah tanah rendah ke tinggi, its simply an issue of people who are not doing the work they are suppose to be doing.

Also to those saying the about the river level being higher so cannot pump, there has been no issue of the river overflowing, its always an issue of gettting the water from the retention pond to the river, the pond which was only meant for Sri muda but has sinced been piggy back by other upscale projects like kemuning utama and alam impian to name a few.