The snowmelt season has now finished for the Takiya basin, and we enter a period of low-flows as dry weather continues through the first 2-3 weeks of June. The hydrograph above shows an overall downward trend in water levels - the diurnal snowmelt pattern disappears at the end of May and after that several small rainfall events interrupt the decrease in flows.
Rainy season has already been in full swing in Kyushu and southern Japan, but it seems the rains will not arrive in Niigata yet. Until the rains come, we will see some of the lowest flows during a year. Annual minimum flows usually occur before the rainy season arrives in late June, or at the end of summer in late September.
Torrential localized rainfall has been a feature of the weather in Japan over the past week as unstable atmospheric conditions prevail. Today the precipitation station north of Takiya basin (Takane) recorded 54mm/h during a storm, while the Miomote station to the south recorded zero rainfall.
 |
| Stage = 31.5cm, Q = 0.32m3/s, Ta = 24C, Tw = 17C |
 |
| Miomote gauge (JMA Amedas network) |
