【摘要】 1996年7月~2000年10月,在研究区进行4次水深地形调查监测,通过GoldenSoftware系统计算相连两次水深调查的数据得出局部冲蚀变化情况。研究分析表明:在1996年7~10月,由于洪水季节的影响,在短短的3个月内,有约4×108m3的沉积物发生淤积。其后几年,该区一直处于冲蚀状态。在1996年10月~1998年10月,有约8.9×107m3沉积物被冲蚀掉;在1998年10月~2000年10月,有约1.4×108m3沉积物被冲蚀掉。因此,在前4次调查期间,研究区有约1.7×108m3的沉积物发生淤积。2004年7月的补充调查表明:该区近岸部分还处于侵蚀状态,海滩剖面没有到达平衡。更多还原

【Abstract】 Changes in the morphology of the coastal zone were monitored during the period from 1996 to 2000.A Golden Software system was used to calculate the differential surfaces between the surveys in order to investigate the local patterns of accretion and erosion and to determine the volume changes between consecutive surveys.Volumetric studies showed that the net accretion in the study period was about 1.7×10⁸m³.Between July 1996 and October 1996,a time interval characterized by intense runoff,an accumulation of about 4×10⁸m³ occurred.In the period from October 1996 to October 1998,a period of diminution in runoff and sediment supply in the upstream,erosion of 8.9×10⁷m³ occurred,indicating sediment starvation of the area.Between October 1998 and October 2000,due to an inadequate supply of runoff and sediment,about 1.4×10⁸m³of sediments was eroded and transported offshore.Supplementary surveys undertaken in July 2004 indicated that equilibrium had not been reached.更多还原