10.4122/1.1000001022
Okashita, A.
A.
Okashita
Ogata, K.
K.
Ogata
New Act Legislated in Japan for Well-balanced Hydrological System and Urban Inundation Prevention
DTU Library, Technical University of Denmark (DTU)
2005
Conference full text
Act
Hydrological system
urban
inundation prevention
Comprehensive mitigation measure
Ministry Of Land, Infrastructure
Infrastructure
Ministry Of Land
Ministry Of Land, Infrastructure
Infrastructure
Ministry Of Land
2005
en
10.4122/1.1000001021
application/pdf
This paper presents the new act legislated in Japan for well-balanced hydrological system and urban inundation prevention. The comprehensive mitigation measures for flood control have been carried out by the government for nearly 30 years. Since it does not have a legal basis to stand on, there is a limitation to implement the measures on a mandatory basis. In order to supplement this disadvantage, the new act was constituted to bridge the existing laws such as the river law, the sewerage law, the flood prevention law and the town planning law so that the concerted effort of river administrators, sewerage administrators and local governments becomes effective. The comprehensive mitigation measures are able to be effectively promoted based on the river basin inundation prevention plan over the river or the river basin legally designated by the Minister of Land, Infrastructure and Transport, Prefectural Governor or Mayor. Especially, by applying this new act it has become much easier to impose severe restriction on the acts that hamper the function of storm water retention and infiltration. In addition to the flood control, this act will contribute to achieve the well-balanced hydrological system in urban areas as well.