| 1 | """ Script for calculating maximum inundation at building locations |
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| 2 | |
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| 3 | Inputs: |
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| 4 | |
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| 5 | swwfile - name of sww file |
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| 6 | - assume that all conserved quantities have been stored |
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| 7 | |
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| 8 | buildings_filename - name of file containing building data, sourced |
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| 9 | from NBED |
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| 10 | |
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| 11 | time_min - beginning of user defined time range |
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| 12 | - default will be first available time found in swwfile |
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| 13 | |
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| 14 | time_max - end of user defined time range |
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| 15 | - default will be last available time found in swwfile |
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| 16 | |
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| 17 | Output: |
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| 18 | |
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| 19 | - building_filename (.csv) augmented to include maximum depth, momentum and |
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| 20 | velocity and stored in same location as swwfile |
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| 21 | Name = augmented_buildings.csv |
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| 22 | |
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| 23 | """ |
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| 24 | |
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| 25 | from pyvolution.util import file_function |
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| 26 | import project |
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| 27 | from os import sep |
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| 28 | from math import sqrt |
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| 29 | |
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| 30 | # Inputs |
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| 31 | #timestampdir = '20060703_062936' # HAT |
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| 32 | #timestampdir = '20060703_062753' # LAT |
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| 33 | timestampdir = '20060703_062900' # MSL |
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| 34 | file_loc = project.outputdir + timestampdir + sep |
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| 35 | swwfile = file_loc + project.basename + '.sww' |
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| 36 | buildings_filename = project.buildings_filename |
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| 37 | time_min = None |
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| 38 | time_max = None |
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| 39 | |
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| 40 | def get_buildings_from_file(filename,bounding_polygon): |
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| 41 | from coordinate_transforms.redfearn import redfearn |
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| 42 | fid = open(filename) |
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| 43 | lines = fid.readlines() |
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| 44 | fid.close() |
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| 45 | buildings = [] |
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| 46 | line1 = lines[0] |
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| 47 | line11 = line1.split(',') |
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| 48 | for i in range(len(line11)): |
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| 49 | if line11[i].strip('\n').strip(' ') == 'LATITUDE': lat_index = i |
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| 50 | if line11[i].strip('\n').strip(' ') == 'LONGITUDE': lon_index = i |
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| 51 | if line11[i].strip('\n').strip(' ') == 'BUILDING_N': name_index = i |
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| 52 | for line in lines[1:]: |
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| 53 | fields = line.split(',') |
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| 54 | lat = float(fields[lat_index]) |
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| 55 | lon = float(fields[lon_index]) |
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| 56 | z, easting, northing = redfearn(lat,lon) |
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| 57 | utm_pt = [easting, northing] |
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| 58 | buildings.append(utm_pt) |
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| 59 | loc = fields[name_index] |
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| 60 | |
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| 61 | return buildings, lines |
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| 62 | |
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| 63 | print '\n Buildings obtained from: %s \n' %buildings_filename |
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| 64 | buildings, lines = get_buildings_from_file(buildings_filename,project.polyAll) |
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| 65 | |
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| 66 | sww_quantity = ['stage', 'elevation', 'xmomentum', 'ymomentum'] |
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| 67 | |
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| 68 | f = file_function(swwfile, |
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| 69 | quantities = sww_quantity, |
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| 70 | interpolation_points = buildings, |
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| 71 | verbose = True, |
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| 72 | use_cache = True) |
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| 73 | |
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| 74 | T = f.get_time() |
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| 75 | |
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| 76 | if time_min is None: |
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| 77 | time_min = min(T) |
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| 78 | else: |
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| 79 | if time_min < min(T): |
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| 80 | msg = 'Minimum time entered not correct - please try again' |
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| 81 | raise Exception, msg |
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| 82 | |
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| 83 | if time_max is None: |
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| 84 | time_max = max(T) |
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| 85 | else: |
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| 86 | if time_max > max(T): |
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| 87 | msg = 'Maximum time entered not correct - please try again' |
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| 88 | raise Exception, msg |
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| 89 | |
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| 90 | lines[0] = lines[0].strip() +\ |
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| 91 | ',MAX INUNDATION DEPTH (m)' +\ |
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| 92 | ',MAX MOMENTUM (m^2/s) \n' |
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| 93 | |
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| 94 | from utilities.polygon import inside_polygon |
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| 95 | N = len(buildings) |
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| 96 | for k, g in enumerate(buildings): |
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| 97 | if k%((N+10)/10)==0: print 'Building %d of %d' %(k, N) |
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| 98 | max_depth = 0.0 |
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| 99 | max_momentum = 0.0 |
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| 100 | max_velocity = 0.0 |
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| 101 | zero_depth = 0.0 |
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| 102 | zero_momentum = 0.0 |
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| 103 | if inside_polygon(g,project.polyAll) == True: |
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| 104 | for i, t in enumerate(T): |
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| 105 | w = f(t, point_id = k)[0] |
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| 106 | z = f(t, point_id = k)[1] |
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| 107 | uh = f(t, point_id = k)[2] |
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| 108 | vh = f(t, point_id = k)[3] |
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| 109 | depth = w-z |
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| 110 | m = sqrt(uh*uh + vh*vh) |
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| 111 | #vel = m / (depth + 1.e-30) |
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| 112 | if depth > max_depth: max_depth = depth |
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| 113 | if m > max_momentum: max_momentum = m |
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| 114 | else: |
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| 115 | max_depth = 0.0 |
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| 116 | max_momentum = 0.0 |
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| 117 | |
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| 118 | lines[k+1] = lines[k+1].strip() +\ |
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| 119 | ',%f' %max_depth +\ |
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| 120 | ',%f\n' %max_momentum |
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| 121 | |
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| 122 | |
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| 123 | augbuildingsfile = file_loc + 'augmented_buildings.csv' |
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| 124 | |
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| 125 | fid = open(augbuildingsfile, 'w') |
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| 126 | for line in lines: |
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| 127 | fid.write(line) |
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| 128 | fid.close() |
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| 129 | |
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| 130 | print '\n Augmented building file written to %s \n' %augbuildingsfile |
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