Data used to print Figure 16 Si3D: Si3D: source at bed, dz = 0.02 m Column 1 = t v_s/r_s Column 2 = r_f/r_s 0.000000,0.000000 3.940693,3.477806 7.881385,6.101465 11.822078,8.375665 15.762770,10.451468 19.703463,12.393243 23.644155,14.295475 27.584848,16.063948 31.525540,17.796178 35.466233,19.446169 39.406925,21.036272 43.347618,22.598613 47.288311,24.094944 51.229003,25.571909 55.169696,27.000122 59.110388,28.410727 63.051081,29.800426 66.991773,31.150341 70.932466,32.477527 74.873158,33.781408 78.813851,35.078469 82.754543,36.359073 86.695236,37.621977 90.635929,38.857589 94.576621,40.077843 98.517314,41.284099 102.458006,42.486425 106.398699,43.667522 110.339391,44.830821 114.280084,45.986212 118.220776,47.110276 122.161469,48.236478 126.102161,49.337933 130.042854,50.445855 133.983547,51.525084 137.924239,52.599192 141.864932,53.671120 145.805624,54.720907 149.746317,55.769803 153.687009,56.813160 157.627702,57.849103 161.568394,58.875357 165.509087,59.884813 169.449779,60.891981 173.390472,61.888342 177.331165,62.875411 181.271857,63.865917 185.212550,64.848077 189.153242,65.843500 193.093935,66.848068 197.034627,67.891692 200.975320,68.950277