This paper discusses a kind of management system of graphic data, text data and spreadsheet data of bridge design system based on PowerBuilder 7 .

Design of GPRS-based hydrological data collection system;

In order to edit hydrological data files, a 32-bit editor under WINDOWS has been developed, In this article, the development process, skill and method of 32-bit Editor for hydrology data are presented, also problems that need to be resolved during the data analysis of automatic precipitation recorder and data format conversion are pointed out as well.

Based on published hydrological data, runoff and sediment were calculated for evaluating units by dividing the study area into hydrological polygons, combining hydrological data with the hydrological polygons map, setting up the accumulative relationship between subcatchments and validating the runoff and sediment dat.

MapX-based isoline mapping for hydrologic data;

The adoption of public data processing software and the algorithm mining software has succeeded in connecting each software with the data,forming the loose coupling system of the hydrologic data mining.