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Wendy Welch

Adapting the Arc Hydro Data Model and Tools to a Hydrogeologic Framework Kitsap Peninsula, Kitsap, Mason and Pierce Counties, Washington. Wendy Welch. Presentation outline. Background Research Problem Proposed Methods Geology Component Borehole Component Hydrostratigraphy Component

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Wendy Welch

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  1. Adapting the Arc Hydro Data Model and Tools to a Hydrogeologic FrameworkKitsap Peninsula, Kitsap, Mason and Pierce Counties, Washington Wendy Welch

  2. Presentation outline • Background • Research Problem • Proposed Methods • Geology Component • Borehole Component • Hydrostratigraphy Component • Conclusion • Projected Timeline • Anticipated Results • References

  3. BackgroundU.S. Geological Survey projects • USGS WA Water Science Center • Collects statewide hydrologic data (surface and groundwater data) • Performs water resource investigations (quality and quantity) • Work with federal, state and local agencies to solve water issues

  4. BackgroundHydrogeologic Framework • Definition: 3D model of the subsurface hydrogeologic units; water bearing aquifers and confining units • Needed for greater understanding of groundwater characteristics and flow directions. • Created by incorporating hydrogeologic and geologic maps, well logs with borehole data and cross sections. • Can be used for conceptual understanding or as input to numerical flow and transport simulation models

  5. BackgroundCurrent methods • Surficial geologic maps compiled from variety of sources and merged into one shapefile. • Well data is retrieved from USGS NWIS (National Water Information System) database • MS Excel is used to store and manage well data • Well data is exported to shapefile format for plotting in Arc Map • Cross sections are made using A Prime’s CrossView in Arc Map • Hydrogeologic unit (HGU) assignments are made and edited in Excel tables • Surfaces representing the tops of each HGU are interpolated using Spatial Analyst tools • Final surfaces viewed in CrossView

  6. BackgroundCASE STUDY • Kitsap GW study • ~790 sq. miles • 20 1:24k geologic maps merged • >2,000 wells with lithologic information • 11 unique hydrogeologic units (aquifers and confining units)

  7. BackgroundArc hydro data model components • Arc Hydro Groundwater (AHGW) is a data model and related set of tools for managing, analyzing and visualizing groundwater information • Originally Arc Hydro was developed for surface water resources. Expanded to include groundwater data • Gil Strassberg developed AHGW data model for doctoral studies at University of Texas at Austin Center for Research in Water Resources • Data model components: Image from Strassberg and others, 2010

  8. Backgroundarc hydro groundwater tools 3 Toolsets developed by Esri and AquaveoTM that use groundwater information from the data model as a foundation. • Groundwater Analyst • Import existing data into AHGW data model (geodatabase) • Edit attributes • Manage well data • Subsurface Analyst • Visualizing borehole logs • Creating and editing cross sections • Making 2D sections and volumes • MODFLOW Analyst • Create, archive and visualize MODFLOW models *not used for this project

  9. Research Problemneed for structure • USGS allows for a lot of freedom for scientists to select methods and software that are appropriate for their individual projects. • Benefits: • Fosters curiosity in new technology. • Flexibility in determining best fit. • Challenges: • Difficult to coordinate users if communication is limited. • Inefficient process if individuals are researching new software independently. • Hard to share or incorporate data from other projects, even within one science center if data is not managed in a universal structure

  10. Research Problemwhy ahgw? • Helps to standardize groundwater and hydrogeologic datasets and maintain organization • Geodatabase design is scalable – elements can be added or removed but the basic structure remains • Data model and tools work within ArcGIS - the standard GIS software of the USGS • Tools have 3D visualization and analytic advantages over current methods

  11. Proposed methodsahgw geodatabase • Geodatabase can be imported from tool in Groundwater Analyst • Gdb can be customized to meet project needs • Coded value domains for certain attributes are used to increase efficiency and maintain integrity of data when editing • Features are related using HydroID attribute

  12. Proposed methodsGeology component • Geologic maps form starting point for hydrogeologic studies • Represent geologic units at land surface • Kitsap project required compilation and edge-matching over 20 1:24,000 geologic map quadrangles • When final shapefile of surficial geology is complete, data is loaded into the GeologyArea polygon feature class of the AHGW geodatabase

  13. Proposed methodsborehole component • BoreholeLog table • Represents vertical data along borehole • Relates to HydroID of Well feature class using WellID • Data is loaded from MS Excel into BoreholeLog table using data loader wizard

  14. Proposed methodshydrostratigraphy component • Hydrogeologic units are assigned to different elevations along borehole. • HGU assignments are the basis for further analysis and processing • Subsurface Analyst tools used to create: • Cross sections • Top surfaces • Fence diagrams • Volumes Image from Strassberg and others, 2010

  15. conclusionprojected timeline • December 2012 • Import current data into geodatabase • January 2013 • Create cross sections and assign HGU top elevations to wells • Interpolate HGU surfaces from tops • February 2013 • Build 3D fence diagrams and volumes in Arc Scene • March-April 2013 • Finalize report and presentation for Symposium

  16. conclusionanticipated results • Presentation of results • WA Hydrogeology Symposium, April 2013 • Adapting a universal system design will: • Improve data management • Increase efficiency • Expand ability to communicate 3D concepts

  17. References

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