Three dimensional analysis of the accumulation rate in the Yahagi delta central Japan

Abstract

The historical change of accumulation rate of the Yahagi delta are estimated from high resolution carbon fourteen dating from four borehole cores and subsurface map. At result, accumulation volume rate increased abruptly from 5.8×10⁴ to 11.1×10⁴ [m³/y] during 5∼2 kyBP although progradation rate decreased gradually from 5.1 to 2.4 [m/ky]. Therefore sediment discharge of the Yahagi river increased abruptly during 5∼2 kyBP.