Imam analyze the causes, namely, the inconsistency of the rules of space and territory through function over land that is not suitable. In a documentary about the 51 reservoirs and ponds in West Java, most of it has been surrounded by densely populated area, not least in Situ Gintung.
“No wonder that when the dam burst, the water instantly swept the houses of citizens. It should be 100 meters from the foot of the embankment there should be no building, even around the body of the dam was not to be. The dams are embankment, not the native land, and are not designed to withstand building , “he said.
People who consciously inhabit the restricted area before, is like installing a time bomb. Nahasnya, early warning and monitoring system as a security alarm embankment was also found in Situ Gintung, could even be in situ mostly in West Java.
Talking about monitoring, it means stepping on the last factor, namely the stability of the embankment. Situ Gintung volume of two million cubic meters of that category there is great, untouched by standard monitoring system, even a visual monitoring. “From the information, no one dared to mention, for example, inclinometer, which is a tool to determine the areas prone to landslides and piezometers for detecting the flow of water through the pore pressure. It was a standard device that is crucial to install, let alone land around the embankment switching function,” he said ,
Imam also questioned drained or drainage system functions and spillway flooding (spill way) that prevent the rapid draw-down (decrease the water quickly so far embankment body and enhance water pressure).
As the experts who feel morally responsible in security-related dam embankment construction and monitoring, Imam provide input through an interview in his office at the Faculty of Science and Technology of Earth (FITB) ITB, Jln. Ganeca No. 10, Bandung, Thursday (2/4).
How the character and general conditions there and reservoirs in West Java?
There situ character, like Situ Gintung, which originally formed naturally, and for the needs of the community, made dike. There is also another character situ, for example dammed the embankment at its lowest point so that the accumulation of body water pressure was accommodated.
Other characteristics, namely the embankment at the bottom of a basin so outflows as average, not gather at one point only. It was relatively safe. Situ with levee built around it also. This means that if the embankment is higher than the surrounding, it should be wary of.
For there are indeed soil water levels are higher than the surrounding soil, especially residential areas, should be evaluated and convinced that the construction of the embankment is stable. In essence, the components of the embankment must be ensured to function properly. The component is simple, but its function should always be monitored.
Moreover, as I’m concerned, lakes in Jabar puddle widened due to sedimentation that could not accommodate the volume of water in accordance with the original volume. As a result, the sediment can damage the body of the dam due to high pressure.
As for reservoirs in West Java, such as Jatiluhur, Cirata, and Saguling, tanggulnya already taken into account the factors that will be found in a life span or lifetime of a construction.
In addition, standard and advanced monitoring has also been carried out, including real-time or can be read online with a particular data center systems. It has been also installed the sensor so that when there is a crack of 100 cm, the red light in the control center on.