Active Channel Systems in the Middle Indus Fan: Results from High-Resolution Bathymetry Surveys
Active Channel Systems in the Middle Indus Fan: Results from High-Resolution Bathymetry Surveys
复制标题
梧桐扇中部的主动河道系统：高分辨率水深测量结果
DOI：
--
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
A. Pratap
中科院分区：
文献类型：
--
作者：
Ravi Mishra;D. Pandey;P. Ramesh;Ajeet Kumar;P. Ramesh;Kishor K. Gaonkar;A. Pratap
在阿拉伯海东部的印度扇中部地区进行了多波束条带测深测量。利用高分辨率测深数据，绘制了拉曼海山和拉克西米海脊等主要地貌特征图。这项研究还揭示了蜿蜒的通道系统的存在，继续向远端扇。虽然有几个报告中存在的渠道在不同地区的印度扇，我们在这里报告的存在活跃的渠道，以东部的Laxmi山脊。沿水道轴线沿着的所有水道的总长度约为915公里。各河道的展布范围为189.8 ~ 1980.5m。大部分河道较浅，平均深度约为60米。最长的水道长约256.3公里，宽约702米，深约57米。所观察到的河道与陆基河流河道相似。所识别的河道在性质上是高度弯曲的，其曲流和截弯曲流类似于河流河道的特征。一般来说，研究区的平均河道走向是直道走向的两倍以上。
Multibeam swath bathymetry survey was carried out in the middle Indus fan region in the eastern Arabian Sea. Using high-resolution bathymetry data, major morphological features such as the Raman seamount and the Laxmi ridge have been mapped. This study also reveals the presence of sinuous channel systems, continuing towards the distal fan. Though there are several reports on the presence of channels in different regions of the Indus fan, we report here the presence of active channels to the east of the Laxmi ridge. The total length of all channels along the channel axis is about 915 km. The individual spreads of the channels vary from 189.8 to 1980.5 m. Most of the channels are shallow with the average depth measuring about 60 m. The longest channel is about 256.3 km long, 702 m wide and about 57 m deep. The channels observed are similar to the land-based fluvial channels. The channels identified are highly sinuous in nature, their meanders and cut-off meanders are similar to the characteristics of fluvial channels. In general, average channel course in the study area is more than twice the straight course.