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AGU期刊一周Research Spotlight
AGU发布最新Editor's Highlight和国外工作学习机会(Feb 21~Feb 27, 2020)
时间:2020年02月28日 11:10来源: 点击数:

Representing Estuaries and Braided Rivers as Channel Networks

The human eye is quite good at identifying channel networks among the rich patterns exhibited by estuaries and braided rivers, but computers have a harder time doing so. Could they do better?

Source: Journal of Geophysical Research: Earth Surface

76431

The Waimakariri River in New Zealand is a typical example of a braided river. The algorithm described in the paper is able to extract the channel network from a digital elevation model and deduce the topological features such as the main channels and the connecting points. Credit: Hiatt et al. [2020], Figure 7a

Because of human action on rivers, water streams have mostly been perceived as single-thread systems that carry water and sediment. Natural rivers are more complex because they exhibit not a single, well-identified channel but a network of entangled channels. Understanding their dynamics is of paramount importance to many scientific and engineering problems, for example in river restoration.

Hiatt et al. [2020] tackle this problem and propose innovative tools for studying channel networks in braided rivers and estuaries. Pattern identification is easy to the human eye but training a computer to do so is far more difficult. The authors show how the channel network can be determined from topographic and bathymetric data. 

Citation: Hiatt, M., Sonke, W., Addink, E. A., van Dijk, W. M., van Kreveld, M., Ophelders, T., et al. [2020]. Geometry and topology of estuary and braided river channel networks automatically extracted from topographic data. Journal of Geophysical Research: Earth Surface, 125, e2019JF005206. https://doi.org/10.1029/2019JF005206

—Christophe Ancey, Associate Editor, JGR: Earth Surface

AGU发布最新国外工作学习机会:

1. Post-Doctoral Fellow

Memphis, Tennessee

Up to $55,000 per year

The University of Memphis

Two postdoctoral positions for hydrologic research at the University of Memphis Center for Applied Earth Science and Engineering Research

https://findajob.agu.org/job/8012066/post-doctoral-fellow/?LinkSource=PremiumListing

2. Postdoctoral Fellow

Fort Collins, Colorado

$55,000-$60,000

Postdoctoral position in remote sensing in the Department of Atmospheric Science at Colorado State University in Fort Collins, Colorado

https://findajob.agu.org/job/8012060/postdoctoral-fellow-/

3. PhD Student Opportunity on Atmospheric Chemistry in France

Créteil, Val-de-Marne (FR)

Laboratoire Interuniversitaire des Systemes Atmospheriques

We seek a highly motivated individual trained in one or more aspects of atmospheric chemistry or physics to perform fundamental research under the guidance of professors within our laboratory. This research will form the student's PhD thesis and is expected to lead to several scientific publications. https://findajob.agu.org/job/8012053/phd-student-opportunity-on-atmospheric-chemistry-in-france/

4. Ohio University, Department of Geological Sciences: Online Master of Science (MS) Opportunities

Athens, Ohio

Department of Geological Sciences Ohio University

We invite applications to its online, non-thesis Master of Science program for the Fall of 2020.

https://findajob.agu.org/job/8012050/ohio-university-department-of-geological-sciences-online-master-of-science-ms-opportunities/

5. Postdoc - Arctic Methane Challenge

Pasadena, California (US)

Jet Propulsion Laboratory/NASA

New ideas are all around us, but only a few will change the world. That's our focus at JPL. We ask the biggest questions, then search the universe for answers—literally. We build upon ideas that have guided generations, then share our discoveries to inspire generations to come. Your mission—your opportunity—is to seek out the answers that bring us one step closer. If you're driven to discover, create, and inspire something that lasts a lifetime and beyond, you're ready for JPL.

https://findajob.agu.org/job/8012044/postdoc-arctic-methane-challenge/?LinkSource=PremiumListing

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