Paleohydrology and flood geomorphology of Ares Vallis
Paleohydrology and flood geomorphology of Ares Vallis
复制标题
阿瑞斯山谷的古水文学和洪水地貌
DOI：
10.1029/96je02564
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发表时间：
1997
影响因子：
--
通讯作者：
V. Baker
中科院分区：
文献类型：
--
作者：
G. Komatsu;V. Baker
战神瓦利斯是火星上的一条流出通道，长约1500公里，局部宽度超过100公里，深度超过1000米。我们利用古水力技术估算了该航道的古泄流能力。在不受支流和二次入流影响的狭窄和异常深的河段，估计可能的最大峰值流量约为108-109m~3/S，比已知的任何陆地洪水大1-2个数量级。这些高流量水流理论上能够输送直径超过10米的巨石。下游的沉积平原，阿瑞斯沉积进入克赖斯平原，地貌特征表明洪水具有很高的侵蚀能力。在拟建探路者登陆点的这一地区，我们预计会发现一个复杂的沉积序列，这些沉积是由不同的古洪水水流水力、沉积物运移特征以及可能的初级洪水地貌的二次修改造成的。
Ares Vallis is a Martian outflow channel which is about 1500 km long and locally exceeds 100 km in width and 1000 m in depth. We estimate the channel's paleoflow capacity using paleohydraulic techniques. At a constricted and unusually deep reach, not affected by tributaries or secondary inflows, the estimated possible maximum peak discharges are of the order of 108–109 m3/s. These values are 1 to 2 orders of magnitude larger than any known terrestrial floods. These high-discharge flows were theoretically capable of transporting boulders larger than 10 m in diameter. The downstream depositional plain, where Ares debauches into the Chryse Planitia, displays geomorphological features indicative of high erosional capacity by the flooding. In this area, site of the proposed Pathfinder landing, we expect to find a complex sequence of sediments created by varying paleoflood flow hydraulics, sediment transport characteristics, and probable secondary modification of the primary flood landforms.