Kumamoto – A scrapped dam task might have limited the damage from the flooding of the Kuma River system in the heavy rains that struck Kumamoto Prefecture in July if the dam had actually been constructed, federal government computations have revealed.
The evaluations revealed that the dam, called the Kawabegawa dam, may have lowered the top river circulation price to two-thirds in the city of Hitoyoshi in Kumamoto if it had actually been built as intended.
The computations were assembled by the land ministry’s Kyushu Regional Development Bureau as well as revealed at the very first conference of a catastrophe evaluation board composed of participants from the main federal government, the Kumamoto Prefectural Government as well as 12 districts situated along with the river system on Tuesday.
According to the bureau, the top circulation price of the Kuma River at the time of the calamity, which resulted in several shed lives as well as houses, is approximated to have pertain to around 7,500 heaps per secondly on an initial basis, based upon the flood degrees around the water degree monitoring terminals in Hitoyoshi.
If flood modification was done via the dam, the bureau approximates that the top circulation price would certainly have been up to around 4,700 heaps per secondly.
In the following board conference, the bureau prepares to show the locations that are presumed to have been swamped if the dam had actually been built.
With the dam’s major building and construction job obstructed by objection activities by residents, leaders of the districts around the river system required that the task be scrapped.
The main federal government, after that led by the now-defunct Democratic Party of Japan, made a decision to finish the task in 2009 after Kumamoto Gov. Ikuo Kabashima articulated resistance.
Since after that, the main as well as prefectural federal governments had actually produced a river network in hopes of regulating floodings without developing a dam. They prepared 10 various other water control concepts, consisting of raising of shores, in November in 2015.
The main federal government, nonetheless, has actually not finished lawful treatments to formally eliminate the dam task.
Following the rainstorms, the districts in the river container have been advising the main as well as prefectural federal governments to apply extreme flood control actions, consisting of dam building and construction.