APPENDIX.-TIME-AREA-DEPTH DATA The tables give the essential time-area-depth data for the 33 storms for which maps and curves were drawn. The storms are arranged chronologically; and in each case, the computations for the maximum 1-day period are given first, those for the maximum 2-day period, second, and so on until all the computations are given. The first column gives the periods of maximum rainfall; the second column gives the rainfall centers. These centers are indicated by the letters used to designate them on the storm maps, figures 58 to 93. The sequence of these letters for a given period of a given storm indicates the manner in which the different centers were combined. Attention is called to the fact that a given letter does not necessarily identify the same center for different periods of rainfall of a given storm. In each case the letters apply only to the centers indicated on the corresponding map. The third column shows the isohyetal depths for which the enclosed areas and average depths of rainfall are given in the fourth and fifth columns, respectively. The abbreviations Max. and Min. in the third column indicate whether the center is a peak or depression area; and the figures opposite, in the fifth column, give the maximum or minimum depths of precipitation at the centers. The area in square miles, in the fourth column, is computed to 2 significant figures for quantities up to 1000, and to 3 significant figures for greater amounts. The average depths of rainfall are computed to the nearest tenth of an inch. Not all of the areas and corresponding average depths of rainfall were used in platting the time-area-depth curves. Only those corresponding to the largest peaks were used. Occasionally, as for the maximum 1-day period of the storm of July 14-16, 1916, the curve represents data taken from two or more peaks. For convenience in reference, the figures in the fifth column used in constructing the curves are shown in bold-faced type. |