An assessment of spatial methods for merging terrestrial with GGM-derived gravity anomaly data

Odumosu, Joseph Olayemi; Nnam, Victor Chukwuemeka; Nwadialor, Ifeanyi Jonathan

doi:10.1016/j.jafrearsci.2021.104202

Cited by 4 publications

(2 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It indicates that areas with greater elevation (mountains, plateaus) may exhibit positive gravity anomalies, indicating greater subsurface density or mass accumulation. When denser minerals exist beneath elevated regions, this positive correlation can be observed [14], [23].…”

Section: Discussionmentioning

confidence: 93%

Geological Structure Model for Recharge Area in Patuha Geothermal Field

Indriani,

Anjasmara,

Utama

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

Geothermal sustainability requires geological structure analysis using gravity methods for groundwater management. Geological structure analysis reviews fault data. Geological structure as a pathway for fluid movement for groundwater management in the research area, especially the Patuha Geothermal Field, West Java. This study uses global gravity model, terrestrial gravity, DEM, and geological data. The gravity method applied in this research involves calculations for latitude correction, free air correction, bouguer correction and terrain correction. The final results of this research are free air anomaly, complete Bouguer anomaly, and model evaluation (MRSE, MRE, and MAE). Free air anomaly results from free air correction of global gravity model data. DEM topography analyzes free air anomaly. The FAA data model evaluated RMSE at 1.27, MRE at 0.004, and MAE at 0.83. 138.02–280.26 mgal is the FAA range. The research area’s elevation range is 836–2431 m. Topography and free air anomaly correlate 0.75. Positive high connection. Mountains and plateaus may have positive gravity anomalies. Free air, bouguer, terrain, and CBA are applied to global gravity model data. The CBA model evaluation indicates quality. RMSE is 1.47, MRE is 0.012, and MAE is 1.11. CBA fluctuation implies fault spread. Faults serve as water flow conduits and channels, increasing the risk of infiltration. Meanwhile, cracks are being distributed as conduits and for infiltration. This research forms the basis for developing and increasing geothermal production so that further studies are needed regarding the influence of geological structures for reservoir in geothermal areas.

show abstract

Section: Discussionmentioning

confidence: 93%

Geological Structure Model for Recharge Area in Patuha Geothermal Field

Indriani,

Anjasmara,

Utama

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

show abstract

“…A total of 568 gravity data points distributed across Ado town were used in this study. The used data comprise of 112 terrestrial points obtained using Scrintrex CG5 gravimeter, 432 points obtained from earlier works using gravity interpolation by Kriging method [8] and 24 points from Gravity forward modelling approach [19]. Further information about the data is presented in Table 2.…”

Section: Methodsmentioning

confidence: 99%

An assessment of the implications of gravity reduction methods on local geoid modelling over Ado Ekiti

Irughe¹,

Abiodun²,

Odumosu³

2023

Nig. J. Tech.

View full text Add to dashboard Cite

There are several gravity reduction approaches that are available for use in geodetic applications. More so, with the rapid rate at which gravimetric geoid models are being incorporated into Global Navigation Satellite System (GNSS) solutions, the need for precise regional models is becoming increasingly relevant. The two chosen gravity reduction approaches (Bouguer and Residual Terrain Model (RTM)) were used to reduce gravity anomalies over Ado town. The reduced anomalies were then used to compute a local geoid for the study area using the conventional Stokes integral in the Remove Compute Restore (RCR) technique. Comparison of the computed geoid by both methods with GNSS Levelling data at selected locations show that the RTM reduced anomalies produce a better geoid model than the Bouguer reduced anomalies over the study area with a RMSE of 83.2cm and 83.5cm respectively.

show abstract

Integration of satellite geodetic observations for regional geoid modeling using remove-compute-restore technique

et al. 2021

View full text Add to dashboard Cite

stokes (LSMS) was used in the quasi-geoid determination of the study region. Using the 1parameter fit, the modified Stokes integral (FFT(b)) outperformed the LSMS model with a root mean square (rms) difference of 0.6cm, while the LSMS outperformed both the unmodified (FFT(a)) and the modified (FFT(b)) Stokes integral using the 4-parameter fit with a rms difference of 0.5cm. The use of both models in this study created a better perception of the quasi-geoid differential analysis, and a more refined understanding of their interaction with the satellite based quasi geoid.

show abstract

An assessment of spatial methods for merging terrestrial with GGM-derived gravity anomaly data

Cited by 4 publications

References 16 publications

Geological Structure Model for Recharge Area in Patuha Geothermal Field

Geological Structure Model for Recharge Area in Patuha Geothermal Field

An assessment of the implications of gravity reduction methods on local geoid modelling over Ado Ekiti

Integration of satellite geodetic observations for regional geoid modeling using remove-compute-restore technique

Contact Info

Product

Resources

About