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DOI | 10.1073/pnas.1708404114 |
Entropy and optimality in river deltas | |
Tejedor, Alejandro1; Longjas, Anthony1; Edmonds, Douglas A.2,3; Zaliapin, Ilya4; Georgiou, Tryphon T.5; Rinaldo, Andrea6,7; Foufoula-Georgiou, Efi1 | |
2017-10-01 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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ISSN | 0027-8424 |
出版年 | 2017 |
卷号 | 114期号:44页码:11651-11656 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Switzerland; Italy |
英文摘要 | The form and function of river deltas is intricately linked to the evolving structure of their channel networks, which controls how effectively deltas are nourished with sediments and nutrients.Understanding the coevolution of deltaic channels and their flux organization is crucial for guiding maintenance strategies of these highly stressed systems from a range of anthropogenic activities. To date, however, a unified theory explaining how deltas self-organize to distribute water and sediment up to the shoreline remains elusive. Here, we provide evidence for an optimality principle underlying the self-organized partition of fluxes in delta channel networks. By introducing a suitable nonlocal entropy rate (nER) and by analyzing field and simulated deltas, we suggest that delta networks achieve configurations that maximize the diversity of water and sediment flux delivery to the shoreline. We thus suggest that prograding deltas attain dynamically accessible optima of flux distributions on their channel network topologies, thus effectively decoupling evolutionary time scales of geomorphology and hydrology. When interpreted in terms of delta resilience, high nER configurations reflect an increased ability to withstand perturbations. However, the distributive mechanism responsible for both diversifying flux delivery to the shoreline and dampening possible perturbations might lead to catastrophic events when those perturbations exceed certain intensity thresholds. |
英文关键词 | spectral graph theory information theory self-organization resilient deltas |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000414127400052 |
WOS关键词 | STUDYING CONNECTIVITY ; INFORMATION-THEORY ; CHANNEL NETWORKS ; SURFACE-ENERGY ; GENERAL-MODEL ; SEDIMENT ; DYNAMICS ; SUSTAINABILITY ; AVULSIONS ; STABILITY |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/204811 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Univ Calif Irvine, Dept Civil & Environm Engn, Irvine, CA 92697 USA; 2.Indiana Univ, Dept Earth & Atmospher Sci, Bloomington, IN 47405 USA; 3.Indiana Univ, Ctr Geospatial Data Anal, Bloomington, IN 47405 USA; 4.Univ Nevada, Dept Math & Stat, Reno, NV 89557 USA; 5.Univ Calif Irvine, Dept Mech & Aerosp Engn, Irvine, CA 92697 USA; 6.Ecole Polytech Fed Lausanne, Lab Ecohydrol, CH-1015 Lausanne, Switzerland; 7.Univ Padua, Dipartimento Ingn Civile Edile & Ambientale, I-35131 Padua, Italy |
推荐引用方式 GB/T 7714 | Tejedor, Alejandro,Longjas, Anthony,Edmonds, Douglas A.,et al. Entropy and optimality in river deltas[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2017,114(44):11651-11656. |
APA | Tejedor, Alejandro.,Longjas, Anthony.,Edmonds, Douglas A..,Zaliapin, Ilya.,Georgiou, Tryphon T..,...&Foufoula-Georgiou, Efi.(2017).Entropy and optimality in river deltas.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,114(44),11651-11656. |
MLA | Tejedor, Alejandro,et al."Entropy and optimality in river deltas".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 114.44(2017):11651-11656. |
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