Model:Cliffs

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Cliffs

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Summary Contact Technical specs In/Output Process Testing Other Component info Also known as Model type Single Model part of larger framework Note on status model Date note status model Incorporated models or components: Spatial dimensions 1D, 2D Spatial extent Continental, Global, Landscape-Scale, Patch-Scale, Reach-Scale, Regional-Scale, Watershed-Scale Model domain Coastal, Marine One-line model description Numerical model to compute tsunami propagation and runup on land in the shallow-water approximation Extended model description Cliffs features: Shallow-Water approximation; Use of Cartesian or spherical (lon/lat) coordinates; 1D and 2D configurations; Structured co-located grid with (optionally) varying spacing; Run-up on land; Initial conditions or boundary forcing; Grid nesting with one-way coupling; Parallelized with OpenMP; NetCDF format of input/output data. Cliffs utilizes VTCS-2 finite-difference scheme and dimensional splitting as in (Titov and Synolakis, 1998), and reflection and inundation computations as in (Tolkova, 2014). References: Titov, V.V., and C.E. Synolakis. Numerical modeling of tidal wave runup. J. Waterw. Port Coast. Ocean Eng., 124(4), 157–171 (1998) Tolkova E. Land-Water Boundary Treatment for a Tsunami Model With Dimensional Splitting. Pure and Applied Geophysics, 171(9), 2289-2314 (2014) Keywords: Tsunami, Inundation, Runup on land, Shallow-water model, Name Elena Tolkova Type of contact Model developer Institute / Organization NorthWest Research Associates, Inc. Postal address 1 4118 148th Ave NE Postal address 2 Town / City Redmond Postal code 98052 State Washington Country United States Email address e.tolkova@gmail.com Phone 4258895991 Fax 4255569099 Supported platforms Unix, Linux, Mac OS Other platform Programming language Fortran90 Other program language Code optimized Multiple Processors Multiple processors implemented Shared memory Nr of distributed processors Nr of shared processors Start year development 2013 Does model development still take place? Yes If above answer is no, provide end year model development Code development status Only maintenance When did you indicate the 'code development status'? 2020 Model availability As code Source code availability (Or provide future intension) Through web repository Source web address https://github.com/Delta-function/cliffs-src Source csdms web address Program license type BSD or MIT X11 Program license type other Memory requirements 100 MB - few GB in 2D, depending on grid size Typical run time 1 sec - few hrs, depending on 1D or 2D, grid size, and length of simulation Describe input parameters integer - type of coordinates (1 - cartesian, otherwise-spherical) DEM file name number of grids enclosed in Master grid enclosed DEMs file names if any still sea threshold minimal flow depth friction coefficient topo flag: 0-wall, otherwise - land inundation depth to place vertical wall, if any time step total amount of steps integer - apply initial deformation to bottom or sea surface integer - flag to continue or stop after input stops (0 for interrupt) number of steps between screenshots number to subsample screenshots in x number to subsample screenshots in y number of timesteps between saving boundary feed to enclosed grids number of steps between maxwave updates number of virtual gages steps between outputs in gage time histories i,j indexes of gage locations on the grid Input format ASCII, Binary Other input format Input data in NetCDF format: bathymetric grids, and any of the following: boundary input time histories, and/or initial displacement of sea floor or sea surface, and/or either or both components of the initial velocity of the water column. Describe output parameters Netcdf binaries of velocities and elevation screenshots in Master grid �Netcdf binary of maximum water surface elevation in Master grid �Netcdf Time histories of the water surface elevation at virtual gages; Netcdf binaries of boundary input time-series for the enclosed grids, one �file for each boundary (east, west, north, south) Output format Binary Other output format Text log file documenting the program execution. Pre-processing software needed? Yes Describe pre-processing software To improve stability of the computations, it is recommended to pre-process bathymetry map with depth_ssl (module included with the source code). Post-processing software needed? No Describe post-processing software Visualization software needed? Yes If above answer is yes Other visualization software Whatever a user prefers to visualize netcdf data sets Describe processes represented by the model Tsunami propagation from a source earthquake to a coastal site, land inundation. Describe key physical parameters and equations Shallow-water equations Describe length scale and resolution constraints Typical resolution for open-ocean propagation: 2-4 arc-min, near the coast: 30-1 arc-sec; for lab experiments: tens to few cm. Describe time scale and resolution constraints Time step is limited by Courant stability criteria (CFL < 1). Typical time step for open-ocean propagation: 15 s; near the coast: 0.5-5 s. Typical simulation time for geophysical tsunamis: few to 36 hours. Describe any numerical limitations and issues Subject to CFL stability condition. Sharp depth changes can cause instability even with low Courant numbers. Pre-processing with depth_ssl is recommended (see Cliffs User Manual at http://arxiv.org/abs/1410.0753 ) Describe available calibration data sets Cliffs is benchmarked as described in: E. Tolkova. Land-Water Boundary Treatment for a Tsunami Model With Dimensional Splitting Pure and Applied Geophysics, Vol. 171, Issue 9 (2014), pp. 2289-2314 Examples of modeling with Cliffs (complete set-ups included) are described in Cliffs User Manual at http://arxiv.org/abs/1410.0753 Upload calibration data sets if available: Describe available test data sets http://elena.tolkova.com/Cliffs_data/slpbeach.zip http://elena.tolkova.com/Cliffs_data/OkushiriTsunami.zip for description of the test data sets, see http://arxiv.org/abs/1410.0753 Upload test data sets if available: Describe ideal data for testing Do you have current or future plans for collaborating with other researchers? no plans yet Is there a manual available? Yes Upload manual if available: Media:Cliffs manual.pdf Model website if any http://elena.tolkova.com/Cliffs.htm Model forum / discussion board Comments This part will be filled out by CSDMS staff OpenMI compliant No but possible BMI compliant No but possible WMT component No but possible PyMT component Is this a data component Can be coupled with:

Model info Authors Elena Tolkova Source code Go to external source code site Model citations Nr. of publications: 3 Total citations: 151 h-index: 3 m-quotient: 0.23 QR-code Link to this page Other models by author Cliffs

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Nr. of publications:	3
Total citations:	151
h-index:	3
m-quotient:	0.23

Featured reference(s)	Open Access Status	Year	Type of Reference	Cited
Tolkova, Elena; 2014. Land–Water Boundary Treatment for a Tsunami Model With Dimensional Splitting. Pure and Applied Geophysics, 1712289–2314. 10.1007/s00024-014-0825-8	· submittedVersion	2014	a module overview describing a module	19

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