伊拉克底格里斯河摩苏尔河段特性分析

采用天然河道实测资料分析和实验室试验分析方法对伊拉克底格里斯河摩苏尔55km河段的河道床沙组成进行研究,目的是分析河床表层及底层泥沙组成,以及该河段的床沙粗化条件.通过收集天然河道的床沙资料,对沙样进行实验室分析,结果表明:底格里斯河摩苏尔河段床沙已形成粗化:一般河床表层泥沙颗粒大小分布随着河段距离的增加而减小,床沙接近于均勻分布,表层床沙沙样颗粒中圆盘形、 球形、柱形和片状分别为48.34%、25.2%、15.34%和11.08%.在床沙的表层和底层泥沙以粗沙砾石为主,分别为74%和36%.

Characteristics of Tigris River Bed at Mosul City, Iraq

Evaluation study of natural characteristics of 55km reach of Tigris riverbed material located at the Mosul city area was conducted. The main objective of the study is to analyze the surface and subsurface bed material at the located reach, and to explain the armoring condition in Tigris riverbed. From the result analysis of the field and laboratory work of the collected samples from the surface and subsurface layers of the riverbed material, it was concluded that Tigris riverbed had been reached previously the armoring condition. In general the grain size distribution of the surface layer decreased with distance along the study reach of the river. The riverbed material was approaching the homogeneous condition Finally the surface bed material particles have mainly the disc spherical, cylindrical and blade shape by a percentage of 48.34%, 25.2%, 15.34% and 11.08% respectively. While the dominant size in the surface and subsurface layer was very coarse gravel by percentage of 74% and 36% respectively.