Bridging Subsurface Geologic Databases with Cross-Sections in GIS

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Marcia Lynch
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1 Bridging Subsurface Geologic Databases with Cross-Sections in GIS Eva E. von Thury ESRI International User Conference Padre Associates, Inc. Project Geologist / GIS Analyst June 29, 2016

2 Outline Introduction to Padre ArcGIS for Pre-field Planning Field Data Collection In-Office Data Entry Data Processing Analysis Conclusions

3 Outline Introduction to Padre ArcGIS for Pre-field Planning Field Data Collection In-Office Data Entry Data Processing Analysis Conclusions

unique solutions through a blending of complementary technical service

4 Who We Are and What We Do Padre Associates Inc. Multidisciplinary consulting firm established in 1996 Provide balanced and unique solutions through a blending of complementary technical service areas: Environmental Services Geoenvironmental Services Geotechnical/Civil Engineering Mapping & Spatial Services

5 GIS for Project Planning, Execution, and Reporting

6 Outline Introduction to Padre ArcGIS for Pre-field Planning Field Data Collection In-Office Data Entry Data Processing Analysis Conclusions

7 ( ( ArcGIS Pre-Field Planning Site Map with Proposed Exploration Locations and crosssection lines FEET ³ Area 1 Area 2 r Location d Well Location ll Location (CPT) Location reened Interval Piezometer Location Abandoned Well Location Active Well Location Soil Boring Location # Cone Penetrometer (CPT) Location ED Test Pit Location Cross-Section Location Angled Well Casing Angled Well Casing Screened Interval Parcel Boundary 10' Elevation Contour (2016)! Soil Boring Location Cross-Section Location # Cone Penetrometer (CPT) Location Angled Well Casing ED Test Pit Location Angled Well Casing Screened Interval Cross-Section Location Parcel Boundary Angled Well Casing 10' Elevation Contour (2016) Angled Well Casing Screened Interval Parcel Boundary 10' Elevation Contour (2016) Parcel Boundary 10' Elevation Contour (2016)

8 Outline Introduction to Padre ArcGIS for Pre-field Planning Field Data Collection In-Office Data Entry Data Processing Analysis Conclusions

9 In-Field Locating with GIS Maps Site Maps locate ³ FEET explorations in the field. Area 2

10 Field Data Collection After the exploration location is located, Padre sets up for data collection Padre collects, categorizes, and logs collected soil samples

11 Outline Introduction to Padre ArcGIS for Pre-field Planning Field Data Collection In-Office Data Entry Data Processing Analysis Conclusions

12 Back in the Office. Samples are sent for lab analysis Subsurface data collected in the field is entered in the office into gint to organize survey, lithology, sample types, and lab data for export to GIS

13 gint Subsurface data management reporting software Manages borehole, well logs, CPT, and geophysical logs. Creates fence diagrams, graphs, tables, etc. from entered lithologic, sample, and lab data

14 Back in the Office. gint is comprised of a parent table with coordinates of each drill hole is linked to child tables

15 Back in the Office..containing lab data

16 Back in the Office. and lithologic data that can be plotted on the crosssection in ArcMap based on coordinate and elevation data.

17 SURFACE Topographic survey added into the gint as a TIN

18 Outline Introduction to Padre ArcGIS for Pre-field Planning Field Data Collection In-Office Data Entry Data Processing Analysis Conclusions

19 In ArcMap The gint toolbar is used to select cross-section B-B to run. Area 1 Area 2 Area 3

20 In ArcMap Drill holes to display on B-B are selected gint selection arrow used to highlight B-B and select Output Fence Report with Selected Boreholes Area 1 Area 2 Area 3

21 Back to gint The Output Fence Report opens the gint Output table. Coordinates for B-B will already be populated in the Baseline Coordinate box.

22 gint Export to dxf Set the scale, axes, and select the TIN(s) to display on B-B. Export B-B to a DXF.

23 Convert DXF to GDB In ArcMap

24 CAD to Geodatabase Designate a location to save the geodatabase. Set the Reference Scale to 10, the default will result in fractions.

25 Outline Introduction to Padre ArcGIS for Pre-field Planning Field Data Collection In-Office Data Entry Data Processing Analysis Conclusions

26 Plan and Cross-Section Views Area 1 Area 2 Set to the same scale: 1 inch = 40 feet

27 Plan and Cross-Section Views Area 2 Plan view and crosssection are the same scale Features in the plan view are projected 1:1 in the cross-section. Blue line highlights the intersection of A-A with B-B.

28 Cross-Section View Lab data displayed on B-B based on coordinates and elevations of the sample.

29 Cross-Section View Projection distance calculated in GIS with Linear Referencing toolbar Depth of well screen and drill hole lithology material graphics Lab and lithology data from gint PID TPH data C4-C12

30 Cross-Section View Changes in contaminant concentration vary laterally and with depth

31 Plume Mapping Extent of the contaminant plume mapped in RED based on lab data

32 Plume Mapping Area 1 Area 2 Same scale, so contaminant plume projected onto surface.

33 Outline Introduction to Padre ArcGIS for Pre-field Planning Field Data Collection In-Office Data Entry Data Processing Analysis Conclusions

34 Conclusion Area 1 Area 2 GIS and gint are used together to accurately map contaminant plumes for site clean-up programs and to show progress over time. Red = Current Brown = Historical

35 Contact Information Eva E. von Thury Padre Associates, Inc. Project Geologist / GIS Analyst evonthury@padreinc.com

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