摘要
利用漳州港海域无围堰填海造地前后的水深测量数据，结合海域地质钻探、表层和柱状沉积物资料，用数字地形模型方法计算了该区海底的冲淤量，分析了冲淤变化及其影响因素。结果显示：（1）淤积主要发生在近岸海域，其主要原因是近岸3—10m厚的海底淤泥层在回填土的挤压和推移下发生形变，产生淤浅假象；另一个原因是回填时部分泥沙流失入海，淤积在近岸海域，致使淤积强度增大。（2）由近岸往外，淤积强度逐渐减弱，并过渡为冲刷状态。
Based on the depth data of the Zhangzhou Harbour sea area surveyed beforeand after large scale impolder without cofferdam, along with the surface sediment dataand the drilling data, scouring-silting changes in this sea area are analyzed by using thedigital terrain model, and the factors affecting the scouring-silting changes are dis-cussed. The results show that: (1) Silting happened in the nearshore sea area. Themain cause is that the silt layer to a thickness of 3A-10m was extruded and processed bythe backfilled soil during the impolder, and produced a feint of shoal. Another cause isthat part of the silt deposited in the nearshore area during and after the impolder, whichmade the silting be intensified. (2)The silting gradually weakened its intensity and tran-sited into scouring state from nearshore to shallow sea area.
出处
《热带海洋学报》
CAS
CSCD
北大核心
2001年第3期68-74,共7页
Journal of Tropical Oceanography
基金
福建省自然科学基金资助项目(D0010015)
关键词
数字地形模型
填海造地
冲淤变化
福建
漳州港
海底
digital terrain model
impolder
scouring-sliting change
Zhangzhou Harbourin Fujian Provice
