![\"\"](\"https:\/\/blogs.ua.es\/westerntethys\/files\/2022\/06\/llobregat_3d.png\")
The 3D distribution of the granulometry classes along the Z axis in each of the 433 compiled boreholes in the LRD. The plotting adopted a 1:1:50 (x = 2, y = 2 and z = 0.5) aspect ratio for better display. The color assigned to each granulometry class is cyan for gravel, yellow for coarse sand, gray for silt\u2013clay, and red for the basement.<\/p><\/div>\n
On the basis of the high density of boreholes and the subsequent geological knowledge gained during\u00a0the last six decades, the Quaternary onshore Llobregat River Delta in northeastern Spain was\u00a0selected to show the application. The public granulometry dataset produced by the Water Authority\u00a0of Catalonia from 433 boreholes in this strategic coastal groundwater body was clustered into the\u00a0clay\u2013silt, coarse sand, and gravel classes. Three interactive 3D HTML models were created. The first\u00a0shows the location of the boreholes granulometry. The second includes the main gravel and coarse\u00a0sand sedimentary bodies (lithosomes) associated with the identified three stratigraphic intervals,\u00a0called lower (>50 m b.s.l.) in the distal Llobregat Delta sector, middle (20\u201350 m b.s.l.) in the central Llobregat, and\u00a0upper (<20mb.s.l.) spread over the entire Llobregat. The third deals with the basement (Pliocene and older\u00a0rocks) top surface, which shows an overall steeped shape deepening toward the marine platform\u00a0and local horsts, probably due to faulting. The modeled stratigraphic elements match well with the\u00a0sedimentary structures reported in recent scientific publications.<\/p>\n
This proves the good performance\u00a0of this incipient Python application for visualizing the 3D stratigraphic architecture, which is a crucial\u00a0stage for groundwater management and governance.<\/p>\n