荆江分蓄洪区防洪基础信息演示系统的构建和运行

荆江分蓄洪区适时分蓄超过荆江河道安全泄量的洪水，确保荆江大堤、江汉平原和武汉三镇的安全，为长江防洪做出了贡献。为有效开展分洪管理防洪决策信息支持，构建了一套分蓄洪区的防洪基础地理信息演示系统。分析了以往构建系统中需求分析和信息组织的不足，较为详细地进行了需求分析，科学地进行数据组织及数据库设计，并在此基础上，采用原型法进行系统设计。最后利用控件Mapobjects，将GIS功能嵌入Visual Basic 6.0编制的应用程序中，实现用户需求的各种功能。系统整合了分蓄洪区基础地理数据、水利设施以及安全建设等数据，较好地反映了荆江分蓄洪区的现实特点和意义。系统的运行得到湖北省荆江分蓄洪区工程管理局的肯定。

DESIGN AND REALIZATION IN INFORMATION DEMONSTRATION SYSTEM OF JINGJIANG FLOOD DIVERSION AREA

Jingjiang flood diversion area is designed to diverte flood when the flood exceeds the safety flood discharge in Jingjiang part of the Changjiang river for insuring the satety of Jingjiang Great Embankment, Jianghan Plain and the city of Wuhan. It contributes continually to prevent or control flood, so we try to build an information system to manage and demonstrate that the area can supply effective information for decision-making in preventing flood. This paper analyzed the deficiencies of requirement analysis and information organization during the period when we built the information system according to usual thought. After that we did lots of detailed preparing jobs, such as analysing users' requirement and preprocessing data. We then organized abundant data, designed and realized database. After designing the system by prototype method, we developed the information system for Jingjiang flood diversion area by Visual Basic 6.0 and Mapobject, which have many functions required by users. The system unified basic information of Jingjiang flood diversion area, which reflects the characteristic and significance of the area. We think small and effective system would be better, which satisfied the requirements of Engineering Management Bureau of Jingjiang Flood Diversion Area.