Global rates and patterns of channel migration in river deltas
Global rates and patterns of channel migration in river deltas
复制标题
河流三角洲河道迁移的全球速率和模式
DOI:
10.1073/pnas.2103178118
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Passalacqua, Paola
中科院分区:
文献类型:
--
作者:
Jarriel, Teresa;Swartz, John;Passalacqua, Paola
River deltas are dynamic systems whose channels can widen, narrow, migrate, avulse, and bifurcate to form new channel networks through time. With hundreds of millions of people living on these globally ubiquitous systems, it is critically important to understand and predict how delta channel networks will evolve over time. Although much work has been done to understand drivers of channel migration on the individual channel scale, a global-scale analysis of the current state of delta morphological change has not been attempted. In this study, we present a methodology for the automatic extraction of channel migration vectors from remotely sensed imagery by combining deep learning and principles from particle image velocimetry (PIV). This methodology is implemented on 48 river delta systems to create a global dataset of decadal-scale delta channel migration. By comparing delta channel migration distributions with a variety of known external forcings, we find that global patterns of channel migration can largely be reconciled with the level of fluvial forcing acting on the delta, sediment flux magnitude, and frequency of flood events. An understanding of modern rates and patterns of channel migration in river deltas is critical for successfully predicting future changes to delta systems and for informing decision makers striving for deltaic resilience.
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影响因子:
3.9
作者:
Tessler, Zachary D.;Voeroesmarty, Charles J.;Syvitski, James P. M.
通讯作者:
Syvitski, James P. M.
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
I. Zaliapin;E. Foufoula‐Georgiou;M. Ghil
通讯作者:
M. Ghil
DOI:
10.1073/pnas.1711330115
发表时间:
2018-02-13
影响因子:
11.1
作者:
Finotello A;Lanzoni S;Ghinassi M;Marani M;Rinaldo A;D'Alpaos A
通讯作者:
D'Alpaos A
影响因子:
16.6
作者:
Edmonds DA;Caldwell RL;Brondizio ES;Siani SMO
通讯作者:
Siani SMO
影响因子:
56.9
作者:
Tessler, Z. D.;Voeroesmarty, C. J.;Foufoula-Georgiou, E.
通讯作者:
Foufoula-Georgiou, E.