Journal of Geophysical Research: Earth Surface Comment on “A Simple Model for Regolith Formation by Chemical Weathering” by Braun et al.: Contradictory Concentrations and a Tale of Two Velocities
Journal of Geophysical Research: Earth Surface Comment on “A Simple Model for Regolith Formation by Chemical Weathering” by Braun et al.: Contradictory Concentrations and a Tale of Two Velocities
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地球物理研究杂志：地球表面对 Braun 等人的“化学风化形成风化层的简单模型”的评论：矛盾的浓度和两种速度的故事
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R. Bay
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作者：
Cheryl K Roth;Sarah A. Dent;Sheryl E. Parfitt;Sandra L. Hering;R. Bay
提出了一个有趣的模型，预测了在山坡上静止的含水层中，临界区的加深速率与横向水力坡度成正比。不幸的是，该模型基于的假设导致了矛盾和预测，即排放浓度相对于风化产物是过饱和的。因此，论文从模型中得出的其余推论不能被视为有效。该模型的一个修正版本表明，临界区的加深与局部补给成正比，而不是与横向地下水位梯度成正比。
An intriguing model has been presented predicting that the rate of deepening of the critical zone is proportional to lateral hydraulic gradients in a hillslope’s perched aquifer. Unfortunately, the model is based on assumptions that lead to a contradiction and the prediction that discharge concentrations are supersaturated with respect to weathering products. Consequently, the remainder of the paper’s deductions from the model cannot be regarded as valid. A corrected version of the model implies that deepening of the critical zone is proportional to local recharge, and not to lateral water table gradients.