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<br />3-3 <br /> <br /> <br />~ <br /> <br />Great care should be taken to assure ~~~!, decimal points are included <br />in all of the labeled data f~elds. Omission of these decimal points <br />is the most common source of error. Commas must not be used to signify <br />thousands. Preprinted data must be crossed out on all unused lines. <br />A list of TR-20 input data forms is given in Table 3-2. <br /> <br />Schematic drawings, completed input data sheets, computer listing of <br />input data, and computer output for five sample jobs are shown in <br />Appendices A through E. <br /> <br />Preparation of input data can be divided into the following requirements <br />and functions: <br /> <br />1. Prepare a schematic drawing that conveniently identifies the <br />locations, drainage areas, CNs, T , and reach lengths for the watershed. <br />c <br />It should display all alternate structural systems together with the <br />routing and evaluation reaches through which they are to be analyzed <br />(Appendix/A, page A-2). <br /> <br />~ <br /> <br />2. Establish a Standard Control list for the watershed. (Appendix A, <br />page A-5). <br /> <br />3. Compile the tabular data to support the requirements of the <br />Standard Control list. This may consist of Structure Data, Stream <br />Cross Section Data, Cumulative Rainfall Data, and the Dimensionless <br />Hydrograph Table. <br /> <br />4. Establish the Executive Control statements that describe each <br />storm and alternative situation that is to be analyzed through the <br />Standard Control list. (Appendix A, page A-6). <br /> <br />. <br /> <br />\ <br />