Here flows the Daini-Neyagawa. This river is a testament to Osaka’s fight against floods. The Daini-Neyagawa plays a crucial role in protecting Neyagawa. It helps manage water flow and prevent disasters.
Neyagawa is located in Osaka Prefecture. It sits on the left bank of the Yodo River. The city is near the Ikoma Mountains. Much of Neyagawa is low-lying. This makes it vulnerable to flooding. For centuries, residents battled flood damage.
In 1954, the Neyagawa Rehabilitation Plan began. This plan included digging the Daini-Neyagawa River. The goal was to improve water drainage. Another plan in 1976 added flood control basins. These measures aimed to protect the area.
However, these efforts had limitations. A flood in 1982 impacted thousands of homes. Sewage pumps shut off because the river couldn’t handle the flow. This event sparked comprehensive flood controls. River administrators and sewer management worked together.
Ken Saito has been involved since 1988. He has witnessed the evolution of flood control. Underground diversion channels were planned. These channels would act as new flood control facilities. They would be built under roads without land acquisition.
The Daini-Neyagawa is part of a larger system. This system includes the Onchigawa River. The Onchigawa River has diversion facilities. These facilities direct water into the Daini-Neyagawa. This helps control the flow volume.
Osaka Prefecture has worked with 11 municipalities. Together, they prepared for unexpected rainfall. They devised rules for regulating sewage pump operation. These rules prevent water damage.
Comprehensive flood control continues to evolve. Facilities are added and pump operation is regulated. The Daini-Neyagawa plays a vital role in this ongoing effort. It helps protect the region from the worst effects of flooding. The Neyagawa basin is steadily becoming more flood-resilient.