Low flows and typhoons

During the month from mid-August to mid-September river stage has varied widely from low flows of 0.25 m stage to peaks of up to 1.3 m. Typhoon No.10 passed over northern Japan during August 30-31 and brought moderately heavy rain to the Takiya River basin. Total storm precipitation of 92 mm and an hourly maximum of 24 mm/h fell at Mt. Ishiguro (elevation 900 m), while low elevation gauges at Miomote and Takane (Amedas) recorded lower intensities and about 60 mm for the storm total.

Stage = 0.343m, Q = 0.380 m3/s

Very large accumulations of fine gravel have occurred at the gauging cross-section (likely due to the typhoon event), although confirmation of the stage-rating curve showed that there had not yet been a significant change. The newly installed Hobo logger was almost buried under the loose and unconsolidated gravel.