Research Of Engineering GIS And The Application In The Regulation Of YRE

GIS (Geographic Information System) is a system for capturing storing checking, manipulating analyzing and displaying data that are spatially referenced the Earth [1] (By Doe, 1987). At present, many fields remain to further research, especially the profound combination of GIS technique with ECE (Estuarine and Coastal Engineering), which should be developed for the purposes as follows: (1) to serve the huge comprehensive work in changeable natural conditions and difficult construction conditions which takes a long period and covers a large region, e.g. the regulation work of deepwater channel in the YRE (Yangtze River Estuary) (2) to combine the GIS with applied numerical model (3) to study the hydrodynamic processes and characteristics of waves, tidal currents and sediment transport, as well as the affection carried by the regulation work in an estuary (4) to monitor and to analyze EES (Evolution of Erosion and Sedimentation) and the variation of riverbed (5) to play a role of dynamic supervising of a engineering project. Therefore, the conception of EGIS (Engineering GIS) presented in this thesis, is practically important.To sum up, main contents of this thesis consist of 3 parts as follows. (1) At first, the conception of EGIS is put forward. And some basic techniques of it are discussed, including the integration of the applied numerical model with GIS, the research of creating DEM (Digital Elevation Model) and the application of DEM in ECE. (2) Secondly, the 2D and 3D flow differential models of YRE are applied. It is also studied that how to bring facilities of spatial analyses and capabilities of database managements of GIS into play. In this part, the first work is pretreatment of a numerical model, including creating calculating grids automatically, improvement of the linear boundary technique and so on. The second work is to estimate the siltation of a basin or channel by Liu's equation. The third work is to build an EDBMS (Engineering Data Base Management System) for the result of mathematical model. Then the temporal data (tide level, velocity of flow, EES, etc.) could be demonstrated and visualized dynamically and interactively. The third work is to analyze the EES after the first stage regulation work of YRE. (3) At last, YRE EGIS is designed and developed systematically in this thesis.