METHOD FOR ESTIMATING TIDE LEVEL AND METHOD FOR SIMULATING RIVER LEVEL

摘要

PROBLEM TO BE SOLVED: To make possible simulations for control of estuary pumps and an estuary gate for a river level simulation by estimating the amount of rainfall for up to 48 hours in the future and tide level from the previous data preserved. SOLUTION: An amount of rain that may fall in a source river basin 101 for up to 48 hours in the future is made the same as the previous data to calculate an outflow V1 from the source river basin 101, and an outflow V3 to other rivers is subtracted to calculate an upstream flow rate V2 that flows into a river 100. Inflow amount from a number of irrigation pumping stations 104 placed along the basin of the river 100 are added from the previous data to calculate a downstream flow V4 to determine the water level of an esturary reservoir 105. The tide level H of a harbor 110 is determined for astronomical tide level and the precious deviation data and is compared with the water level of the estuary reservoir 105 to calculate discharge amount from the controlled conditions of estuary pumps P1-P5 and an estuary fate G to correct the water level of the estuary reservoir 10. Therefore, simulations of various conditions are made possible using the previous data.