The initial Channel object can be created using the 'generate_initial_channel' function. ones(( nit,)) # dimensionless Chezy friction factor crdist = 2 * W # threshold distance at which cutoffs occur kl = 60.0 /( 365 * 24 * 60 * 60.0) # migration rate constant (m/s) kv = 1.0e-12 # vertical slope-dependent erosion rate constant (m/s) dt = 2 * 0.05 * 365 * 24 * 60 * 60.0 # time step (s) dens = 1000 # density of water (kg/m3) saved_ts = 20 # which time steps will be saved n_bends = 30 # approximate number of bends you want to model Sl = 0.0 # initial slope (matters more for submarine channels than rivers) t1 = 500 # time step when incision starts t2 = 700 # time step when lateral migration starts t3 = 1200 # time step when aggradation starts aggr_factor = 2e-9 # aggradation factor (m/s, about 0.18 m/year, it kicks in after t3) ones(( nit,)) # channel depths for different iterations pad = 100 # padding (number of nodepoints along centerline) deltas = 50.0 # sampling distance along centerline Cfs = 0.011 * np. Nit = 1500 # number of iterations W = 200.0 # channel width (m) D = 6.0 # channel depth (m) depths = D * np. To run the below cells, you must first import the library: This age is relative to the start time of the simulation (= the first channel, age = 0.0). In addition, the 'ChannelBelt' object also has a 'cl_times' and a 'cutoff_times' attribute that specify the age of the channels and the cutoffs. These are implemented as classes a 'Channel' and a 'Cutoff' are defined by their width, depth, and x,y,z centerline coordinates, and a 'ChannelBelt' is a collection of channels and cutoffs. The sketch above shows the three 'meanderpy' components: channel, cutoff, channel belt.
In the 'meanderpy' module we use a simple linear relationship between the nominal migration rate and curvature, as recent work using time-lapse satellite imagery suggests that high curvatures result in high migration rates ( Sylvester et al., 2019). Curvature is transformed into a 'nominal migration rate' through multiplication with a migration rate (or erodibility) constant in the Howard & Knutson (1984) paper this is a nonlinear relationship based on field observations that suggested a complex link between curvature and migration rate. This is a kinematic model that is based on computing migration rate as the weighted sum of upstream curvatures flow velocity does not enter the equation.
#Meander animations free
"Live in Berlin is free improv done very well by excellently trained musicians.'meanderpy' is a Python module that implements a simple numerical model of meandering, the one described by Howard & Knutson in their 1984 paper "Sufficient Conditions for River Meandering: A Simulation Approach". (Maciej Lewenstein - Polish Jazz Recordings and Beyond - Poland) "Amazing and stupendous!!! (.) Outstanding record, fantastic artistic achievement!" (.) Incredibly exciting music, that not only works live in concert, but also does well in the CD player." "Modern, creative and exciting - four musicians you really have to write in the book. "Avant-garde jazz radiates as the guiding star over a fine-woven network of jazz, world, rock and pop." "The musicians are improvising just fantastic – the music is filled with brightness, drive, expressions and innovative musical decisions." Listed in the 'Excellent Releases of the First Half of 2019' (Tomasz Gregorczyk - Rozmowy Improwizowane - Polish Radio II - Poland)Īmong Avant Music News Picks of the Week : (Adam Baruch - The Soundtrack of my Life - Poland) "Definitely one of the best European Avant-Garde Jazz albums that landed on my desk so far in 2019" (Tom Greenland - New York City Jazz Record #10, 2019 - USA) "Layered and lush, with indistinct outlines or boundaries." Maybe hyperbolic politicians should start taking tips from Jazz musicians." (.) Avant-garde to some, modern mainstream to others, Live in Berlin helps define what cooperation can achieve. " the band’s second CD (.) the quartet members now travel firmly on their own route with no meandering. Layout by Tomo Jacobson & Malwa GrabowskaĬover photo by Malwa Grabowska aka. Knof of UFO Sound StudiosĮxecutive producing by Tomo Jacobson / Gotta Let It Out Recorded live at Berlin Jazz Units (Musikbrauerei) on Novemby Fabian G.
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