GSTDTAP  > 地球科学
DOI10.1073/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
ISSN0027-8424
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
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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
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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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