Channel network scaling laws in submarine basins
Channel network scaling laws in submarine basins
复制标题
海底盆地的河道网络尺度规律
DOI：
10.1029/2007gl030089
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发表时间：
2007
影响因子：
5.2
通讯作者：
D. Rothman
中科院分区：
文献类型：
--
作者：
K. Straub;D. Jerolmack;D. Mohrig;D. Rothman
河流流域面积通常通过幂律关系与河道长度和局部坡度相关，并且在这些关系中观察到的相对较小的指数范围被认为是由物理机制造成的。提出的机制假设观察到的排水面积和液体排放之间的相关性是由降水引起的。利用加利福尼亚州蒙特雷和文莱达鲁萨兰国近海渠道化大陆坡设置的高分辨率 DEM，我们提取了五个盆地的海底河道剖面和流域面积统计数据。现场和远程观测表明，这些海洋环境中的排放量是由陆架边缘的边界条件决定的。尽管环境和物理过程存在显着差异，但这些数据产生了陆地（河流）观测范围内的海底缩放指数。两种截然不同的设置的缩放关系的收敛支持了通道网络结构由随机游走聚合产生的理论论点。
Fluvial drainage basin area is often related to channel length and local slope through power law relationships and the relatively small range of exponents observed in these relationships is thought to result from physical mechanisms. Proposed mechanisms assume that the observed correlation between drainage area and fluid discharge is caused by precipitation. Using high resolution DEMs of channelized continental slope settings offshore Monterey, CA and Brunei Darussalam we extracted submarine channel profiles and drainage area statistics from five basins. In‐situ and remote observations suggest discharge in these oceanic settings is determined by boundary conditions at the shelf‐edge. In spite of substantial differences in environment and physical process, the data yield submarine scaling exponents within the range of terrestrial (fluvial) observations. The convergence in scaling relationships from two very different settings supports theoretical arguments that channel network structure results from the aggregation of random walks.