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<br />SAI-lPLE PROBLEM <br />ECONOMIC EFFECT OF SINGLE FLOOD EVENTS <br />ON THE 1990 LAND USE PLAN <br /> <br />Problem Statement <br /> <br />Determine the economic impact of five single flood events (2-year, la-year, <br /> <br /> <br />20-year, 50-year and laO-year events) on the projected 1990 land use pattern, <br /> <br /> <br />and request trace output for the medium density residential land use cate- <br /> <br /> <br />gory in damage reach 1. <br /> <br />The format of the data file in the Trail Creek DATA BANK is (12F4.0, 2F8.2, <br />2F4.0, 2F2.0) and a listing of the pertinent items of the data base file is <br />given in Table 1. <br /> <br />Description of Input Requirements <br /> <br />The title and particular job cards are required. The key input variables <br /> <br /> <br />for this computation are ITYPE (Jl.8), to identify the number of single <br /> <br />flood events, NODR (J3.2), for indicating the number of damage reaches in the <br /> <br /> <br />analysis, and lLAND (J3.4), to designate the land use pattern under inves- <br /> <br /> <br />tigation. It should be noted that the alphanumeric characters within the <br /> <br /> <br />parenthesis following the variable name refer to particular cards and related <br /> <br /> <br />card columns. As an example, the first two alphanumeric characters of (Jl.8) <br /> <br />indicate the Jl-card and the character(s) following the decimal point indicates <br /> <br /> <br />a particular field (or card column group). The J8 card is used to define the <br /> <br /> <br />damage reach and land use category for trace output. The titles of the single <br /> <br /> <br />flood events are input on the ST card, and the water surface elevations (WSE) <br /> <br />at the index locations for each single flood event are recorded on the SE <br /> <br /> <br />cards. <br /> <br />The completed coding sheets have been included in this sample problem. <br /> <br />Exhibit 4-2 <br />1 of 26 <br />