Heterogeneous collaborative monitoring process of groundwater variations and load deformation fieldIssuing time:2024-11-11 19:25Link:http://www.zcyphygeodesy.com/en/ ![]() From the heterogeneous observation variation record time series from the regional CORS station, gravity tide station and groundwater monitoring station, compute the groundwater variations and regional load deformation field all-element grid time series in the five steps to realize the heterogeneous collaborative monitoring to regional groundwater and time-vary gravity field by the remove-restore scheme based on the observed surface loads. It is technically required that the long wave parts of the load effects on geodetic variations should be removed to satisfy the regional SRBF approach condition. The variations here can be one or more of the following six types of variations. (1) Height anomaly variations (mm) from GNSS-leveling monitoring network, (2) disturbance gravity variations (μGal) from GNSS-gravity monitoring network or CORS-gravity tide stations, (3) ground gravity variations (μGal) from gravity monitoring network or gravity tide stations, (4) ellipsoidal height variations (mm) for CORS network or GNSS monitoring network, (5) normal or orthometric height variations (mm) from leveling monitoring network, and (6) equivalent water height variations (cm) from hydrological monitoring stations. According to the process of this section, calculate the regional groundwater EWH variation grid weekly time series in advance only from CORS and gravity tide monitoring data, whose monitoring time span was not less than two years. Then, interpolate the groundwater EWH at the hydrological monitoring station from thecalculated groundwater EWH grid to calibrate the hydrogeological parameters and then transform the variation of observed groundwater level (head) into the variation of groundwater EWH at each hydrological monitoring station. |