Investigation on water-resistant measures for agricultural pumping stations against large-scale inundation
2019
Sekijima, K. | Kiri, H. | Azechi, I. | Kimura, N.
Agricultural drainage pumping stations have been built for the sake of draining surplus water of farmlands. Drainage pumping stations have been often damaged recently because of severe flood events caused by new-recorded torrential rains in any regions over Japan. Urbanization and the mixture state of rural and urban characteristics have been advanced in agricultural areas. In those areas, the drainage pumping stations for agricultural uses are potentially exposed to disaster risks and countermeasures for disaster risk reduction on the stations are urgently required by making the stations water resistant. The design standard, Pumping Stations, revised in May 2018 mentions that new and improved pumping stations should be built with water-resistant measures. However, existing pumping stations without water-resistance are necessary to satisfy the standard afterward. In our report, we investigated how the drainage pumping stations with water-resistance are in reality in the fields and reviewed past studies to see how they were. Our study revealed that the countermeasures were performed for the stations or the areas that were actually damaged by past floods. In addition, there are some advanced countermeasures against disasters on the pumping stations. For example, some countermeasures are ready on the assumption that electricity and water supply are stopped due to a potential Nankai Trough Earthquake. Nowadays, the pumping stations are improved with water-resistance on the management sectors for rivers and sewerages mainly in the urban areas.
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