DIVERGENCE SUPPRESSION TYPE TWO-DIMENSIONAL RIVER SIMULATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To accelerate and prevent the easy occurrence of divergence while keeping the features of a two-dimensional simulator by dividing a river into several sections and utilizing the result of one-dimensional simulation to the calculation process of the two-dimensional simulator. SOLUTION: A one-dimensional simulation module 300 uses the water quality sensors 20a to 20c provided at a river 10 to estimate the reaching time of a pollution matter and the density of the reached pollution matter based on the river flow rate data measured by a river flow rate measurement means 210, the initial density data on the river inflow pollution matter measured by a river pollution matter density measurement means 220 and the river length data stored in a river shape data base 200. These estimated results are stored in a river shape data base 350. Then a two-dimensional simulation module 400 estimates the reaching time of the pollution matter and the density distribution of the reached pollution matter based on the reached pollution matter density, the river length data and the river width data which are obtained from the data base 350 and outputs these estimated results to a CRT 800.