Exploring an ‘ideal hill': how lithology and transport mechanisms affect the possibility of a steady state during weathering and erosion
Exploring an ‘ideal hill': how lithology and transport mechanisms affect the possibility of a steady state during weathering and erosion
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探索“理想山”：岩性和传输机制如何影响风化和侵蚀过程中稳定状态的可能性
DOI：
10.1002/esp.4762
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发表时间：
2020
影响因子：
3.3
通讯作者：
S. Brantley
中科院分区：
文献类型：
--
作者：
M. Lebedeva;S. Brantley
我们提出了一个化学反应的山丘内的模型，探讨如何不断变化的孔隙度（和推断，渗透率）影响流动路径和风化。该模型由描述含铁矿物和长石蚀变的水文和反应输运方程组成。选择这些反应是因为之前的工作强调氧和酸驱动的风化对长英质和镁铁质岩石的孔隙度有不同的影响。一个参数控制的前的顺序。在没有侵蚀的情况下，两个反应前沿以不同的速度移动，相对深度取决于地球化学条件和起始成分。反过来，前和相关的孔隙度的变化急剧影响水流的垂直和横向速度。在这些情况下，基于简单模型的风化推进速率估计不适用于单向恒定速度平流。
We present a model of chemical reaction within hills to explore how evolving porosity (and by inference, permeability) affects flow pathways and weathering. The model consists of hydrologic and reactive‐transport equations that describe alteration of ferrous minerals and feldspar. These reactions were chosen because previous work emphasized that oxygen‐ and acid‐driven weathering affects porosity differently in felsic and mafic rocks. A parameter controlling the order of the fronts is presented. In the absence of erosion, the two reaction fronts move at different velocities and the relative depths depend on geochemical conditions and starting composition. In turn, the fronts and associated changes in porosity drastically affect both the vertical and lateral velocities of water flow. For these cases, estimates of weathering advance rates based on simple models that posit unidirectional constant‐velocity advection do not apply.
DOI：
10.1073/pnas.1404763111
发表时间：
2014-04
期刊：
Proceedings of the National Academy of Sciences
影响因子：
--
作者：
D. Rempe;W. Dietrich
通讯作者：
D. Rempe;W. Dietrich
山坡基岩风化和侧流协同演化的低维模型：2. 对风化和渗透性剖面、排水水力学和溶质输出路径的控制
影响因子：
3.2
作者：
Harman, Ciaran J.;Cosans, Cassandra L.
通讯作者：
Cosans, Cassandra L.
利用风化碎屑的数学模型探讨曲率对风化的影响
影响因子：
3.9
作者：
Lebedeva, M.I.;Sak, P.B.;Ma, L.;Brantley, S.L.
通讯作者：
Brantley, S.L.