Abstract
Considering the concept of object-oriented GIS, the mutual relationship of GIS data for hydraulic analysis was considered, and GIS data of drainage basin was constituted for object-oriented structure model. To facilitate the processing and representation of GIS object data, a GIS software program with the customized functions was developed. Customized functions were 1) auxiliary editing, 2) automated functions for elucidating relationships between objects and others, and 3) automatic generation and display functions for the results of hydraulic analysis. The program was applied to the hydraulic analysis in a river basin with 191 reservoirs and 211 channels, and hydraulic analysis data in this basin was automatically generated. As a result, large labor saving was enabled. The program was also applied to a multiphase functional evaluation of an agricultural waterway, and was proved useful for assessing the continuity of a fish habitation network divided by weirs or pumps.
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