ABSTRACT
ABSTRACT: At present, groundwater is being heavily extracted, which causes a series of grave environmental problems such as, land subsidence, seawater inbreak and deterioration of water quality. It is very necessary to study the groundwater resource and make good, rational use of it. Therefore, volume visualization technology is introduced to the field of groundwater resource in this paper. When using volume visualization technology, some scattered points are first sampled in finite space and each point will have one or more properties, which may be its physical property, chemical attributes and so on. Then, using the physical and chemical property data, the inverse distance to a power is adopted and improved to build the 3D model of the existing groundwater conditions. Numerical simulation technology is used to calculate the depression of the groundwater cone, and the velocity and direction of groundwater flow. The finite difference method is adopted to build the model of the groundwater flow field. Lastly, the timespace distribution and dynamic change characteristic of the hydrogeologic layer and its inner physical and chemical attributes are represented by a hybrid volume-rendering technique. The research provides the scientific foundation for decision support for the extraction of groundwater.
