Comment on ''Groundwater affects the geomorphic and hydrologic properties of coevolved landscapes'' by Litwin et al.

Anand, Shashank Kumar; Bonetti, Sara; Camporeale, Carlo Vincenzo; Hooshyar, Milad; Porporato, Amilcare

doi:10.1002/essoar.10510765.1

Cited by 2 publications

(9 citation statements)

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“…In fact, results presented in Bonetti et al (2020) support our contention that the main effects of 𝐴𝐴  highlighted by Anand et al (2022) can be attributed to scaling with the domain size (at least for large enough 𝐴𝐴  ). For example, Figure 2j from Bonetti et al (2020) (reproduced here in Figure 3) suggests that the number of channels along each side of the domain increases with 𝐴𝐴  .…”

Section: Is Domain Size Important?supporting

confidence: 72%

“…In fact this is not the case. We believe that the basic points made by Anand et al (2022) are valid, but we disagree about their importance. We argue that 1.…”

mentioning

confidence: 85%

“…Behavior With Increasing ? Anand et al (2022) suggest that solutions exhibit self-similar behavior as 𝐴𝐴  becomes very large. Based upon this observation they draw further comparison between this landscape evolution model and other systems that have asymptotic behavior as a characteristic scale goes to infinity.…”

Section: Asymptoticmentioning

confidence: 99%

“…This difference is no difference at all in a strict sense, since they are in effect still the same equation. However the presence of 𝐴𝐴  in the governing equation of Anand et al (2022) suggests it may be an important control on the solution. Here we demonstrate that this is the case only when the domain is "small" relative to the characteristic scale of the geomorphic features.…”

Section: As a Dimensionless Domain Sizementioning

confidence: 99%

“…= 𝑙𝑙∕𝓁𝓁𝑔𝑔 , and so, from the perspective of our non-dimensionalization, 𝐴𝐴  2∕3  is simply the domain width expressed in dimensionless form. The direct consequence of this choice is that the model results shown in Bonetti et al and Anand et al (2022) all have domains of width 1 when expressed in their preferred form of non-dimensionalization (since their length scales are expressed as multiples of l), but would be of different dimensionless widths when expressed in ours (since our length scales are expressed as multiples of ℓ g ).…”

Section: As a Dimensionless Domain Sizementioning

confidence: 99%

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Reply to Comment by Anand et al. on “Groundwater Affects the Geomorphic and Hydrologic Properties of Coevolved Landscapes”

et al. 2022

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We appreciate the opportunity to further explore important details of our analysis where it connects with the work of Bonetti et al. (2020). Regarding the relationship between A and a, we indeed should have stated this more precisely. A better wording might have been: "The accumulated area A above a short contour width v 0 can be approximated by A ≈ av 0 where a is the specific contributing area evaluated somewhere on the reference contour. This approximation becomes exact in the limit of small v 0 ."The other point made by Bonetti et al. (2020) regarding our neglect of the importance of the domain size is worth spending some more time considering. Central to this conversation is the importance of the dimensionless parameter 𝐴𝐴  . This number is defined in Bonetti et al. ( 2020) as a measure of channelization, but from our perspective 𝐴𝐴  (or more precisely 𝐴𝐴  2∕3  ) can be most straightforwardly understood as a dimensionless domain size. The comment might appear to show that our paper omitted a major control on evolved landscape morphology. In fact this is not the case. We believe that the basic points made by Anand et al. (2022) are valid, but we disagree about their importance. We argue that 1. 𝐴𝐴  appears to be of limited importance unless one is concerned about the impact of the domain boundary conditions in very small domains (i.e., those encompassing only a few ridges and valleys); 2. Using the domain size to non-dimensionalize model variables (as suggested by Bonetti et al. (2020) and Anand et al. ( 2022)) introduces dependencies on 𝐴𝐴  that we believe obscure more physically meaningful relationships; finally, 3. If domain size is kept constant, increasing 𝐴𝐴  amounts to shrinking the characteristic scale of the topographic features without changing their intrinsic properties.

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Section: Is Domain Size Important?supporting

confidence: 72%

“…In fact this is not the case. We believe that the basic points made by Anand et al (2022) are valid, but we disagree about their importance. We argue that 1.…”

mentioning

confidence: 85%

Section: Asymptoticmentioning

confidence: 99%

Section: As a Dimensionless Domain Sizementioning

confidence: 99%

Section: As a Dimensionless Domain Sizementioning

confidence: 99%

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Reply to Comment by Anand et al. on “Groundwater Affects the Geomorphic and Hydrologic Properties of Coevolved Landscapes”

et al. 2022

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The Concise Guide to PHARMACOLOGY 2023/24: Ion channels

Alexander,

Mathie,

Peters

et al. 2023

British J Pharmacology

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The Concise Guide to PHARMACOLOGY 2023/24 is the sixth in this series of biennial publications. The Concise Guide provides concise overviews, mostly in tabular format, of the key properties of approximately 1800 drug targets, and over 6000 interactions with about 3900 ligands. There is an emphasis on selective pharmacology (where available), plus links to the open access knowledgebase source of drug targets and their ligands (https://www.guidetopharmacology.org/), which provides more detailed views of target and ligand properties. Although the Concise Guide constitutes almost 500 pages, the material presented is substantially reduced compared to information and links presented on the website. It provides a permanent, citable, point‐in‐time record that will survive database updates. The full contents of this section can be found at http://onlinelibrary.wiley.com/doi/10.1111/bph.16178. Ion channels are one of the six major pharmacological targets into which the Guide is divided, with the others being: G protein‐coupled receptors, nuclear hormone receptors, catalytic receptors, enzymes and transporters. These are presented with nomenclature guidance and summary information on the best available pharmacological tools, alongside key references and suggestions for further reading. The landscape format of the Concise Guide is designed to facilitate comparison of related targets from material contemporary to mid‐2023, and supersedes data presented in the 2021/22, 2019/20, 2017/18, 2015/16 and 2013/14 Concise Guides and previous Guides to Receptors and Channels. It is produced in close conjunction with the Nomenclature and Standards Committee of the International Union of Basic and Clinical Pharmacology (NC‐IUPHAR), therefore, providing official IUPHAR classification and nomenclature for human drug targets, where appropriate.

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Comment on ''Groundwater affects the geomorphic and hydrologic properties of coevolved landscapes'' by Litwin et al.

Cited by 2 publications

References 0 publications

Reply to Comment by Anand et al. on “Groundwater Affects the Geomorphic and Hydrologic Properties of Coevolved Landscapes”

Reply to Comment by Anand et al. on “Groundwater Affects the Geomorphic and Hydrologic Properties of Coevolved Landscapes”

The Concise Guide to PHARMACOLOGY 2023/24: Ion channels

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