To Nature reproduction type Public Works 2003.03.20 (1)

The company entered a period of transition from public works that caused deterioration of the environment to natural rebuild-type public works. Last December, the governor of Kumamoto Prefecture, Yoshiko Seya, announced that it would immediately take the removal work after renewing water rights until March 31, 2003, when the water rights of the prefectural Arase Dam Country (50 years) expired on March 31, 2002. In the background of this nationwide first dam removal policy, there is a reason such as environmental deterioration of the Kuma River, fiscal pressure by the repair cost of dam embankment and the generator, and less than 1% of the demand amount of total electricity in the prefecture. In the midst of this dam, Yatsushiro-gun, the "devastating impact of the fishery aquaculture industry due to the deterioration of the natural environment" is a keen peep. The removal of this arase dam is inevitable now, the impact on the existing dam operation and new dam construction of 2700 group size combined nationwide. United States the dam kingdom, where the dam is believed to be a symbol of progress and prosperity, the 75000 more than 50 years have passed since the 1990s, when dams have been removed from the 90 's, and more than 500 dams have been removed. Doubts about water quality, environmental deterioration, flood control and economic effect by dam. Furthermore, in some states of United States, if an accident occurs due to dams, state laws are enacted to impose the responsibility on the dam owners, and they are directing the dam to be removed. After the dam removal in the United States, a lot of schools of fish are confirmed one year later, and the return to nature is advanced. Then, a new industry is born. In addition to the dam removal overseas, reclamation, wetland, and other natural environmental regeneration are the main projects for public works. The regenerated nature contributes to the creation of key industries in the region, including fisheries and hydrophilic tourism, as well as water purification. It has been proven that the rebuilding of the environment is not simply "natural regeneration", but it is effective for economic and regional activity. It is wiser to pursue the possibility of a big business opportunity in a fresh public works flow such as the dam removal, the multi-nature of the river and the reclaimed land.