Diurnal snowmelt pattern absent

Stage 0.404m, discharge 0.801m3/s within 2% of the rating curve estimate

With the coronavirus pandemic the university has severely restricted student research activity and fieldwork. Today I visited the field with family support to allow us to continue to check up on the monitoring and collect a new discharge measurement. We confirmed there has been no change in the rating curve.

The hydrograph above shows little if any diurnal snowmelt pattern, due to the extremely low snowpack conditions this winter and spring. Two significant rainstorms produced modest runoff peaks which would have been much larger with additional snowmelt contributions had there been snowpack.

Date               Event precip. (mm)    Max intensity (mm/h)
1-2     April               40.5                              5
18-19 April               52.5                              6

Overall, runoff for the month of April appears much less than average (provisional data under preparation).

Takiya below gauging point - right bank disturbed by recent logging activity

North of the Takiya basin, the Asahi Mountains (1870m) still snow-covered as viewed from Washigasu Maenodake (825m)