Well,

If topography of basement rock means the depth of friable sediment, here, No relation with the groundwater flow, but in relation with the thickness of aeration and/ or saturation zones.

Regards

@Bayan I mean a crystalline basement complex areas not sedimentary basins

@Bayan I mean a crystalline basement complex areas not sedimentary basins

Well,

In this case, the rock basement will represent the geo-structural boundary of the regional hydrogeological system, either in the form of geo-synclinorium or geo-anticlinorium, which means that it greatly affects the types of aquifers, the movement, direction of groundwater and the amount of storage.

Regards

Thank you Bayan

Groundwater level / contour follows the topography, whether surface or sub-surface. Hence there will be direct correlation between the bedrock topography and groundwater flow direction + gradient. This condition is in the context of crystalline terrain.

Thank you so much Prasad