GIS in Water ResourcesFall 2011

Groundwater Tools for GIS

Built-in Tools

Time-enabled LayersGroundwater and Hydrology Toolsets

Arc Hydro Groundwater Tools• Groundwater Analyst

• MODFLOW Analyst

• Subsurface Analyst- 3D Features- 2D Cross Sections

Groundwater Analyst

Import and Manage Well Data

Point and Click Graphing Tool

Compute Time Series Statistics

MODFLOW Analyst

Import and Export MODFLOW models

Run MODFLOW from ArcGIS

Subsurface Analyst

3D Features

2D Cross Sections

Subsurface Analyst – 3D

CreateGeoSections

Create GeoVolumes

Create and Edit Borehole Data

Representing 2D cross sectionsXS2D Component

Outline• You can create 2D cross sections in ArcGIS

• Cross sections are made of real GIS features

• Cross sections use a (S, Z) coordinate system

• Subsurface Analyst helps you create cross sections within ArcMap

• Manage cross sections within a geodatabase

Subsurface visualization

Layers of 3D volumes that are largely unseen? ?

Visualizing the subsurface can be challenging

Cross sections

…And interpret the rest

We can sample the subsurface…

A A’

A

A’

Wells

Section A-A’

Cross sections help us understand local geology

Map

GIS datasets

Spatial and attribute relationships tie features together …

Borehole log

Section lines

Wells

Raster surfaces

…Creating the connectivity we need to construct meaningful cross sections

You can create cross sections from GIS datasets

Geologic features

GIS features

Works with your ArcGIS tools

Layer symbology, attributes, geodatabase storage, editing…

Cross section features are real GIS features

XS2D component• Part of the Arc Hydro Groundwater data model• Included in the hydrostratigraphy component• XS2D feature classes have a XS2D prefix• They exist in a special coordinate system that

translates vertical coordinates so they can be viewed in ArcMap

Additional data: XS2D_Line, XS2D_Polygon, XS2D_Point…

Common cross section features

Cross Section

Pane

l Div

ider

Bor

elin

e

Major Grid

Minor Grid

Panel

Additional featuresYou can add additional features using the Arc Hydro Groundwater Tools

Saltwater Interface

Surficial Geology

Or create your own features and annotation

Section line featuresCross sections belong to a section line

A set of cross section feature classes per section line…

Simple 2D polylines Define the cross

section in map view

XS2D Catalog• Central part of the XS2D component• Keeps track of feature classes in all cross sections• SectionID is a key attribute = HydroID of a

SectionLine feature

Cross section data

A A’

A A’

Adding Nearby Wells

Built from Standard GIS Operations Like ‘Select By Location’ and ‘Intersect’

Add data by proximity to the section line

Cross section data

A A’

A A’

Adding Outcrops

Add data by overlaying layers with the section line

Cross section coordinatesCross sections use a (Distance, Elevation) coordinate system

And includes vertical exaggeration…

Each system is unique to the cross section…

xy

SZ

S

Data frameThe Data Frame is the canvas where cross sections are drawn

EditPrint

Draft

2D and 3D transformationsYou can convert from 2D to 3D and back again

Building cross sectionsYou can create your own workflows for building cross sections

Example workflow1. Select wells – wells are related with

borehole data

Tip: Select wells within a distance of a section line

Example workflow2. Run the cross section wizard

• Click on the Section Line• Choose:

Features to Include Vertical Exaggeration Grid Line Spacing

Output is a new cross section data frame with features created

Example workflow3. Import additional data

Example workflow4. Sketch panels using standard ArcMap editing

tools

Example workflow5. Arrange the layout

Add:• Legends• Annotation• More Cross Sections

Set:• Data Frame Properties• Grid Line Appearance

Additional workflow – image registration• Start from existing cross section images.• Load and register the images to an existing

SectionLine.

• Wizard helps create necessary features (grid lines,

panel dividers, panels) based on the image registration

process.

Image registration wizard

Register the image using vertical and horizontal lines

Image registration wizardResult is a new data frame with registered image + XS2D feature classes

Key points You can create 2D cross sections in ArcGIS

Cross sections are made of real GIS features - Can

take advantage of all the ArcMap capabilities

Cross sections use a (S, Z) coordinate system

Subsurface Analyst helps you create cross sections

– basic tools, XS2D Wizard, Image registration

Water levels in a cross sectionXS2D Animation

Creating 2D cross sectionsSubsurface Analyst Demo