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<br />e <br /> <br />.. <br /> <br />.- <br />. <br /> <br />COMPREHENSIVE FLOOD PLAIN STUDIES USING <br />SPATIAL DATA MANAGEMENT TECHNIQUES' <br /> <br />Darryl W. Dovis' <br /> <br />e <br /> <br />ABSTRACf: A pilot study undertaken to develop and test analytical methodologies for appli- <br />cation in comprehensive flood plain information studies is described. The methodology permits <br />and encourages comprehensive, systematic, practical assessments of present and alternative <br />future basin-wide development patterns as reflected by alternative land use patterns and phy- <br />sical works in terms of flood hazard, economic damage potential and selected environmental <br />consequences. The analysis methodologies are centered about integrated use of computerized <br />spatial, gridded geographic and resource data files. A family of special purpose utility computer <br />programs access the data file and extract appropriate variables Uid interpret and format the <br />data into specific analytical parameters that are subsequently formatted for input to traditional <br />modeling computer programs. An example application to Trail Creek in Oarke County. <br />Georgia. is described. <br />(KEY TERMS: planning; flood plain management; computer modeling; spatial analysis; data <br />management; flood damages; environmental assessments; urban hydrology.) <br /> <br />INTRODUCTION <br /> <br />Comprehensive flood plain studies undertaken by the Corps of Engineers in recent <br />pilot studies require systematic evaluation of present and alternative future basinwide <br />development patterns that are characterized by alternative land use patterns and physical <br />works. The evaluation is needed for assessing present and possible future flood hazards, <br />economic damage potential, and environmental consequences so that conscious choices <br />may be made by local governmental agencies among possible futuro development patterns. <br />Spatial data management techniques are employed within a traditional analysis frame- <br />work to permit and encourage the comprehensive systematic assessments that are needed. <br />This paper provides an overview of the data management and other specific analytic tech- <br />niques developed, and presents selected results from a test application_ <br /> <br />OVERVIEW <br /> <br />, <br /> <br />The general analytical strategy is to I) assemble and catalogue basic geographic and <br />resource information into a computer data bank; 2) cooperatively, with local agencies, <br /> <br />~ <br /> <br />1 Paper No. 77100 of the Water Resources Bulletin. Discussions are open until February 1. 1979. <br />2Chief, Planning Analysis Branch, The Hydrologic Engineering Center. Corps of Engineers, Davis, <br />California 95616. <br /> <br />e <br /> <br />1 <br /> <br />"'-- <br />