Flash flood issue in Uni Garden (Lorong 1, 2, 3 & 4) Uni Vista Lorong 1.
Back ground
On 18th January 2015, Uni Vista experience worst flash flood in "history":
1. 150 houses (to confirm) in Uni Garden - 6 inches water on entry road.
2. Ten houses in Uni Vista - Water level up to 2.5 feet. Water enter the houses.
3. Thirty houses in Uni Vista - Water level up to about 1 feet on the road in front of the houses.
Uni Vista experience at less 10 times flood in 2014 (between 1 foot and 2 feet). In the previous years, between 2010 - 2014, the same area only experiences one or two serious flash flood (about 2 feet high).
News 1,
news 2.
Possible causes
1. Housing development going up but culvert (two at traffic light) crossing Samarahan ExpressWay never upgraded.
2. One culvert near Central City was block (to confirm).
3. Some water from Central City direction was allow to flow to drain in front of Uni Vista.
4. Geography condition in Uni Garden (Lorong 1, 2, 3, 4 & Uni Vista) not really allow water flow toward a river in Kg. Merdang. Also land issue (can't just built a big drain through private land).
5. Rain rate exceed the out flow rate. Suspect current bottle neck at culvert at traffic light.
6. Close of a water outlet via Unimas (Golf course). Reopen in 2015.
Possible solutions (Drainage designs)
1. To upgrade the culvert crossing Samarahan Expressway from Uni Vista. Current culvert (two adjacent to each others) are only three feets in diameter each, located near to traffic light. It is better if a new culvert to be installed at North side of Uni Vista. If the drain along the road at unimas side become the next bottle neck, then upgrade the drain capacity (as mention by Michael Ang is this WhatsApp Group).
2. There is road linking Central City & Uni Garden. Then it is possible to have a drain linkage. If the drain linkage exist, the it is possible to channel the water from Lorong 12 to a river in Merdang via this lingkage.
3. Uni Vista flood by water flow from Uni Garden, Uni Suare, Uni Capital & (a new housing beside Lorong 1, 3, 5,7). There is a culvert between Uni Square shop & Uni Vista. During heavy rain, blocking water from entering Uni Vista at this culvert may prevent flash flood there. Blocking with water gate (valve).
Possible solutions (Sound out our problem)
1. Meet Samarahan Council, DID & JKR.
2. Uni Garden & Uni Vista community to work together. Include data collection (include short video clips) on water flow during flood.
3. Make use of TaliKhidmat. Call followup from time to time.
4. Come out with proper petition letter (mention by Mr. Ralpheal from Lrg 12k2D)
4. Report to Biro Pengaduan Awam (mention by Pn. Nuralia from Lrg 3).
5. Report to local newspaper.
6. Take advantage of 2016 election machine & politic.
Maps (Unimas, Uni Vista, river)
Blue line - water flow via golf course.
Red line - soil drain
Light blue - small river
Feedback from neighborhood & friends
This post is just the beginning. We need people to challenge & improve the contain. At the end, we gain more understanding of the issue & a much better solutions.