Developers' Workshop and Hackathon

Description of the workshop

This informal workshop was held August 25-27, 2016 at the University of Washington in Seattle. Some talks / discussions took place in the mornings that focused on current and future developments of the software and open problems. Afternoons and evenings were devoted to informal coding sprints to make progress in several specific directions.

Some short versions of talks given at the workshop are listed below:

• Adjoint Error Estimation for Tsunami Modeling given by Brisa Davis
• Data Assimilation using Ensemble Methods for Hurricane Forecasting given by Pushkar Jain and Yuxiang Lin
• Debris Flow with D-Claw given by David George
• Hazard Assessment of Storm Surge given by Marc Kjerland
• Import Clawpack5 and GeoClaw into ForestClaw given by Melody Shih
• Making Tables in Latex given by Donna Calhoun
• Sediment Flow using GeoClaw given by Hui Tang
• Seismic Modeling given by Chris Vogl
• Simulation and Analysis of Asteroid-Generated Tsunamis given by Marsha Berger
• Tsunami Modeling in Karachi Harbour given by Haider Hasan
• Uncertainty Quantification Problems in Tsunami Modeling Using Reduced Order Models given by Donsub Rim

Repository and wiki for workshop: https://github.com/clawpack/clawdev-2016

General focus areas for the workshop were:

• Development of new visualization tools, in particular for three-dimensional simulations:
  • Facilitating the output of only slices of data from a 3D run and plotting the slices using matplotlib, mayavi, or other tools.
  • Full 3D plotting using yt, VisIt, ParaView, or other tools.
  • Plotting 2D GeoClaw output and topography as surfaces in 3D, and/or with mapping tools such as GoogleEarth, cesiumpy, or ipyleaflet.
  • Refactoring I/O routines so VisClaw isn't dependent on PyClaw,
  • Developing new framework for specifying plots, e.g. Griddle.


• Further development of GeoClaw. Some projects that were considered:
  • Improving the GeoClaw Riemann solver,
  • Refactoring refinement criteria checks / regions,
  • Incorporating sediment transport,
  • Expanding netCDF capabilities for input and output,
  • Spatially-varying Manning coefficients,
  • Use of pandas for gauge output,
  • Additional documentation and notebooks.
  • Fix fixed time stepping issue so that time step remains fixed when {\tt dt_variable=false}.


• Other projects of interest to participants:
  • Seismic modeling and coupling to tsunami generation,
  • Adjoint error estimation,
  • Work on ForestClaw version of GeoClaw.

Sponsors: Claw-Dev 2016 was sponsored in part by the UW Department of Applied Mathematics, a UW CoMotion Presidential Innovation Fellowship, and HyperNumerics LLC.

**GeoHack Week:** There will also be a more extensive GeoHack Week the week of November 14, 2016. More details to appear.

Participant List

The following have registered for the 2016 workshop and hackathon:

• Marsha Berger (Courant Institute, NYU)
• Donna Calhoun (Boise State University)
• Brisa Davis (University of Washington)
• David George (USGS, Vancouver, WA)
• Haider Hasan (NED University of Engineering and Technology)
• Pushkar Jain (UT Austin)
• Marc Kjerland (Kyoto University)
• Randy LeVeque (University of Washington)
• Yuxiang Li (UT Austin)
• Kyle Mandli (Columbia University)
• Scott Moe (University of Washington)
• Xinsheng Qin (University of Washington)
• Donsub Rim (University of Washington)
• Melody Shih (Columbia University)
• Hui Tang (Virginia Tech)
• Chris Vogl (University of Washington)

Photos

Registration

Registration is now open using this Google form.

In addition to the above form, participants also should complete this supplementary form.

Hotel Information

The UW Applied Math department has negotiated rates at the following hotels within walking distance of campus (subject to availability):

• University Inn (www.universityinnseattle.com, 15 minute walk) - no more discounted rooms available


• Hotel Deca (www.hoteldeca.com, 11 minute walk) - $175.00 a night


• Watertown Hotel (www.watertownseattle.com, 14 minute walk) - $191.20 a night


• Silver Cloud Inn (www.silvercloud.com, 17 minute walk) - $199.00 a night

You have to book through the department to get these rates, so please specify your hotel needs when you register using the link above.

Schedule

Most of the workshop/hackathon will take place in Lewis Hall, although individual groups may opt for a coffee shop location during the breakout sessions.

Thursday, August 25

8:30 - 9:00: Coffee and bagels (Lewis Hall, third floor lounge).

9:00 - 9:15: Welcome and overview (room 208)

9:15 - 10:30: Lightning talks on current research areas (room 208)

10:30 - 10:45: Break

10:45 - 11:15: Visualization overview and discussion (room 208)

11:15 - 11:45: GeoClaw overview and discussion (room 208)

11:45 - 1:00: Lunch (provided in third floor lounge)

1:00 - 1:30: Set workshop/hackathon goals and form groups (room 208)

1:30 - 6:30: Group work (various locations)

6:30 - ?: Dinner reception at Randy's and Loyce's house -- Map and bus instructions

Friday, August 26

8:30 - 9:00: Coffee and bagels (third floor lounge).

9:00 - 9:20: Talk by Marsha Berger on Asteroid-Generated Tsunamis (room 208)

9:20 - 9:40: Talk by Kyle Mandli on Storm Surge (room 208)

9:40 - 9:50: Break

9:50 - 10:10: Talk by Hui Tang on Sediment Transport (room 208)

10:10 - 10:30: Talk by Dave George on D-Claw (room 208)

10:30 - 2:30: Group work with lunch time & location determined by group (various locations)

2:30 - 2:50: Talk by Chris Vogl on Seismic Modeling (room 208)

2:50 - 3:10: Talk by Donna Calhoun on ForestClaw (room 208)

3:10 - 3:30: Talk by Brisa Davis on Adjoint Methods (room 208)

3:30 - ?: Group work with dinner time & location determined by group (various locations)

Saturday, August 27

10:30 - 1:00: Hacking (room 208 or elsewhere)

1:00 - 1:30: Lunch (provided in the third floor lounge)

1:30 - ?: Working groups report on progress / needs, and then continue working as desired (room 208)

Sunday, August 28

TBD: For those interested, a day hike will be organized. Location, departure & return times, and transporation details will be provided at the beginning of the workshop.