Jakarta, hitclubapk3 Indonesia
—
Geological Agency
reveal the cause of the disappearance of river water around Jorong Gantiang, Nagari Singgalang, Tanah Datar Regency,
West Sumatra
which has gone viral for some time on social media.
Previously, the incident of the loss of river water flow went viral on social media.
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In one of the uploads on X, the video footage shows the condition of river water being cut off and entering the ground.In fact, the flow upstream is quite strong, but it is dry downstream.
The Geological Agency confirmed the location of the river is in the Batang Lalo stream, and said this incident had been going on for a long time.
Then, based on the results of field inspections carried out by the West Sumatra Province ESDM Service, the missing river water appeared downstream and headed towards Lubuak Mato Kuciang.
“This shows that there is an underground river route in the area even though it is not well developed,” explained the Geological Agency on Instagram, Wednesday (10/12).
[Gambas:Instagram]
The viral video is said to show that in the Batang Lalo stream there are limestone outcrops that are in direct contact with the alluvial.
Based on the 1:250,000 scale Geological Map Sheet of Padang, this limestone is included in the Perem Limestone (PI) formation.
On the 1:50,000 scale Geological Map, it is included in the limestone member of the Kuantan Formation.The map shows the position of limestone under alluvial deposits.
According to the Geological Agency, Perem limestone consists of solid, hollow limestone, white, gray and reddish in color, containing thin inserts of basalt, phyllite, shale, gravel and quartzite.In general, it forms rough topography with sharp ridges.
Solid limestone is usually dense, hard and massive, but in some places it still shows the presence of cavities.These cavities can be a place for river water (surface) to enter the limestone.
Thus, the loss of river water is due to the Batang Lalo flow entering the limestone hole or cavity of the Perem limestone formation.Things like this are said to commonly occur in areas where limestone is distributed.
“The Batang Lalo flow disappeared because the river water entered the limestone cavity, flowed through the underground river and emerged downstream (leading to Lubuak Mato Kuciang),” explained the Geological Agency.
The loss of river water in this limestone cavity could occur in other locations nearby.The public also does not need to worry because this will not trigger ground movements in the area.
Meanwhile, geologist and geological and volcanological disaster mitigation expert Ade Edward suspects that the river flowing into the ground is a limestone hill area.
“Well, if there is a river whose water has disappeared, that usually happens in the limestone hill areas. The limestone hill area is prone to dissolution,” said Edward in Padang, Saturday (6/12), as reported by
Between
.
He explained that the phenomenon of river water suddenly breaking off or entering the ground outside the flow is usually known as a loss of river flow.In many cases, this is related to the formation of sinkholes.
This is a geological phenomenon that commonly occurs in areas with certain characteristics.
Ade said that generally in the limestone hill area there are cavities, so that the interrupted river flows into it, which then forms an underground river.
“Well, the character of the limestone hill area is such that the previous flow was cut off,” he explained.
(lom/dmi)
[Gambas:hitclubapk3 Video]
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