Thursday 31 May 2018

Spring hydrograph


The winter to spring hydrograph above shows that there were two significant runoff events during January, followed by two smaller runoff events during February. The main snowmelt season starts at the beginning of March and continues until mid-May. An unusually heavy rainstorm occurs on May 19th causing stage to rise above 2m and estimated discharge to reach 100m3/s.


Today's discharge measurement plotted very close to the stage-rating curve prior to the May 19th flood, indicating that the aggradation of sediment in the reach may have been temporary. Future field work this month will confirm the status of the rating curve.

Cedar tree at the gauging section scarred by flood debris

Cedar tree roots stabilizing the bank at the gauged section

The following photos show the reaches of Takiya River below the gauging section over a distance of about 1 km to the small irrigation diversion close to the confluence with the Miomote River.








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