Abstract:Using finite difference methods, we deduce the solving algorithms for the one-dimensional groundwater diffusion equation. Then, we compare the influence of different differential schemes on groundwater simulation and the corresponding hydrological effects on gravity. The issues of determining the inter-block parameters and linearizing the nonlinear equations are discussed. The results show that, for the superconducting gravimeter (SG) station at Isawa Fan, the influence of different weighting methods of determining inter-block parameters on modeling of groundwater hydrological effects on gravity can reach up to 0.15 μGal, within 1.9% of the total groundwater hydrological effect on gravity, while the influence of different differential schemes and linearizing methods can reach up to 0.12 μGal, within 1.9% of the total groundwater hydrological effect on gravity.
HE Qianqian,SUN Heping. Comparison of One-Dimensional Groundwater Simulating Algorithms in the Correction of Hydrological Effects on Gravity[J]. jgg, 2018, 38(5): 529-532.