source: anuga_work/development/reef_0708/steep_lagoon.py @ 5175

"""Simple water flow example using ANUGA

Water driven up a linear slope and time varying boundary,
similar to a beach environment
"""


#------------------------------------------------------------------------------
# Import necessary modules
#------------------------------------------------------------------------------

from anuga.abstract_2d_finite_volumes.mesh_factory import rectangular_cross
from anuga.shallow_water import Domain
from anuga.shallow_water import Reflective_boundary
from anuga.shallow_water import Dirichlet_boundary
from anuga.shallow_water import Time_boundary
from anuga.shallow_water import Transmissive_boundary
from anuga.shallow_water import Transmissive_Momentum_Set_Stage_boundary
from anuga.shallow_water.data_manager import start_screen_catcher, copy_code_files
from time import strftime, gmtime
from os import sep, environ, getenv, getcwd,umask
from anuga.utilities.polygon import Polygon_function
#------------------------------------------------------------------------------
# Setup computational domain
#------------------------------------------------------------------------------
from anuga.pmesh.mesh_interface import create_mesh_from_regions

name ='steep_lagoon'
wave = [1, -1] #1 returns leading depression N-wave
               #-1 returns leading crest N-wave
crest =[50, 450]
crestdepth = [2, -2, -6]
N = len (crest)
for i in range(N):
    M = len (crestdepth)
    for k in range (M):
        B = len(wave)
        for l in range(B):
            length = (crest[i]+500)
            width = 20.
            A = 1
            T = 2700
            umask(002)
            time = strftime('%Y%m%d_%H%M%S',gmtime())

            output_dir = sep+'d'+sep+'xrd'+sep+'gem'+sep+'5'+sep+'nhi'+sep+'inundation'+sep+'data'+sep+'idealised_bathymetry_study'+sep+'final_models'+sep+'general'+sep+'steep_lagoon'+sep+str(wave[l])+'_'+str(length)+'_'+str(A)+'_'+str(T)+'_'+str(crestdepth[k])+'_'+str(name)+sep
            sww_file = str(name)
            copy_code_files(output_dir,__file__,__file__)

            start_screen_catcher(output_dir)
            dx = dy = .5           # Resolution: Length of subdivisions on both axes
            boundary_polygon = [[0,0],[length,0],[length,width],[0,width]]
            interior_polygon = [[140,0],[280+crest[i],0],[280+crest[i],20],[140,20]]
            interior_polygon2 =[[290+crest[i],0],[499+crest[i],0],[499+crest[i],20],[290+crest[i],20]]
            interior_regions = [[interior_polygon, 8], [interior_polygon2, 50]]
            meshname = str(name)+'.msh'
            create_mesh_from_regions(boundary_polygon,
                                     boundary_tags={'bottom': [0],
                                                    'right': [1],
                                                    'top': [2],
                                                    'left': [3]},
                                     maximum_triangle_area=50,
                                     filename=meshname,
                                     interior_regions=interior_regions,
                                     use_cache=False,
                                     verbose=False)

            domain = Domain(meshname, use_cache=True, verbose=True)

            print 'Number of triangles = ', len(domain)
            print 'The extent is ', domain.get_extent()
            print domain.statistics()
             
            domain.set_quantities_to_be_stored(['stage', 'xmomentum', 'ymomentum'])
            domain.set_minimum_storable_height(0.01)
            domain.set_default_order(2) # Second order spatial approximation
            domain.set_name(sww_file)   # Output name
            domain.set_datadir(output_dir)  


            #------------------------------------------------------------------------------
            # Setup initial conditions
            #------------------------------------------------------------------------------

            def topography(x,y):
                """Complex topography defined by a function of vectors x and y
                """

                z =(-0.84*x)+(0.84*(220+crest[i]))+crestdepth[k]-4         
                N = len (x)
                for j in range(N):

                    if x[j] < 180:
                        z[j] = -4+crestdepth[k] 
                    
                    elif 179 < x[j] < 200:
                        z[j] = 0.2*x[j]-40+crestdepth[k]
                        
                        ##Crest
                    elif 199 < x[j] < (200+crest[i]):
                        z[j] = +crestdepth[k]
                        
                     #Curve down
                    elif (199+crest[i]) < x[j] < (220+crest[i]):
                        z[j] = -0.01*(x[j]-(199+crest[i]))*(x[j]-(199+crest[i]))+crestdepth[k]
                    
                return z
               


            domain.set_quantity('elevation', topography) # Use function for elevation
    ##        domain.set_quantity('friction', 0)         # Constant friction
            domain.set_quantity('friction', Polygon_function( [(boundary_polygon, 0.05),(interior_polygon ,0.2), (interior_polygon2 , 0.05)] ) )#changing friction over two polygons
            domain.set_quantity('stage', 0.)            # Constant negative initial stage


            #------------------------------------------------------------------------------
            # Setup boundary conditions
            #------------------------------------------------------------------------------

            from math import sin, pi, exp, cos, cosh, sqrt 
            Br = Reflective_boundary(domain)      # Solid reflective wall
            Bt = Transmissive_boundary(domain)    # Continue all values on boundary 
            Bd = Dirichlet_boundary([0.,0.,0.]) # Constant boundary values
            Bw = Time_boundary(domain=domain,     # Time dependent boundary  
                               f=lambda t: [sin(2*pi*(t)/1010), -37, 0.0])
            g = 9.81
            offshore_depth = 250
            H_d_ratio = 0.008
            Xo = 67000
            po = 0.03
            def waveform(t):
                return wave[l]*offshore_depth*(sqrt(g/offshore_depth)*t-Xo/offshore_depth)*sqrt(H_d_ratio*po)*H_d_ratio/cosh(sqrt(3*H_d_ratio*po/4)*(sqrt(g/offshore_depth)*t-Xo/offshore_depth))/cosh(sqrt(3*H_d_ratio*po/4)*(sqrt(g/offshore_depth)*t-Xo/offshore_depth))

            Bf = Transmissive_Momentum_Set_Stage_boundary(domain, waveform)
            # Associate boundary tags with boundary objects
            domain.set_boundary({'left': Bd, 'right': Bf, 'top': Br, 'bottom': Br})


            #------------------------------------------------------------------------------
            # Evolve system through time
            #------------------------------------------------------------------------------

            for t in domain.evolve(yieldstep = 5 , finaltime = 4500):
                domain.write_time()

                """
            Generate time series of nominated "gauges" 
            Note, this script will only work if pylab is installed on the platform

            Inputs:

            production dirs: dictionary of production directories with a
                             association to that simulation run, eg high tide,
                             magnitude, etc.
                                
            Outputs:

            * figures stored in same directory as sww file
            * time series data stored in csv files in same directory as sww file
            * elevation at nominated gauges (elev_output)
            """

            from os import getcwd, sep, altsep, mkdir, access, F_OK, remove
            from anuga.abstract_2d_finite_volumes.util import sww2timeseries

            # nominate directory location of sww file with associated attribute
            production_dirs = {output_dir: str(name)}

            # Generate figures
            swwfiles = {}
            for label_id in production_dirs.keys():
                file_loc = label_id
                swwfile = file_loc + str(name)+'.sww'
                swwfiles[swwfile] = label_id
                print 'hello', swwfile
            texname, elev_output = sww2timeseries(swwfiles,
                                                   sep+'d'+sep+'cit'+sep+'1'+sep+'cit'+sep+'natural_hazard_impacts'+sep+'inundation'+sep+'sandpits'+sep+'jbrowning'+sep+'anuga'+sep+'anuga_work'+sep+'development'+sep+'idealised_bathymetry_study'+sep+'final_models'+sep+'general'+sep+'gauges_lagoon.csv',
                                                  production_dirs,
                                                  report = False,
                                                  reportname = '',
                                                  plot_quantity = ['stage', 'speed'],
                                                  generate_fig = False,
                                                  surface = False,
                                                  time_min = None,
                                                  time_max = None,
                                                  #time_unit = 'secs',
                                                  title_on = True,
                                                  verbose = True)
            remove(output_dir+sep+str(name)+'.sww')