GIS in Water Resources Consortium

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GIS in Water Resources Consortium
Water Resources

• Bringing together these two communities by using
  a common geospatial data model

2
Goals for the Conference

• Describe GIS object modeling process for water
  resources
• Obtain feedback on Arc Hydrology Data Model
• Form a larger core group of people to work on the
  model
• Discuss how to make the Consortium more effective

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Conference Program

• Wednesday morning
• ESRIs Technical Vision for Object Modeling in
  GIS (Dale Honeycutt, ESRI)
• Object Modeling for GIS in Water Resources (David
  Maidment, CRWR)

• Wednesday afternoon
• Building the Arc Hydrology Data Model (Kim Davis
  and Tim Whiteaker)
• Implementation perspectives
• Roy Dodson
• Tom Evans
• Michael Blongewicz
• Cindy McKay

Wednesday evening Conference Party at the
Renaissance Hotel, 630-930
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Conference Program

• Thursday morning
• Detailed Structure of the Data Model
• Attaching Behavior to Objects and Programming in
  the Geodatabase
• Thursday afternoon
• Breakout sessions for feedback

• Friday morning
• The role of grid and TIN in the Geodatabase
  context (Steve Kopp, ESRI)
• Future activity of the GIS in Water Resources
  Consortium

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Consortium Membership

• Research Members 25,000 per year to support
  basic investigations
• ESRI, Texas Natural Resources Conservation
  Commission (TMDL WAM), Lower Colorado River
  Authority
• Technical Members 10,000 per year by donation
  or in-kind support
• Dodson and Associates Camp, Dresser McKee
• Business Members ESRI business partners
• Cooperating Members Anyone wishing to help!

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Applying for Consortium Membership
http//www.crwr.utexas.edu/giswr/member/member.htm
l
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ArcObject Model in ArcInfo 8
This is the foundation of the basic
network package provided by ESRI with ArcInfo 8.
Edges and Junctions are highly evolved
versions of Arcs and Nodes that do new cool stuff.
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Arc Hydrology Data Modelhttp//www.crwr.utexas.ed
u/giswr/models/models.htm
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Data Model Extensions
Extension for National Hydrography Dataset
Hydrologic Engineering Center models
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Goal of the Consortium

• Develop an ArcInfo 8.0 data model for
  representing surface hydrology /hydrography
• Drainage networks and objects for water resources
  applications

A practical implementation template for all users
and foundation for developers and researchers
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Objectives

• GeoObject Model Research, Development,
  Implementation, Education
• Feedback into ESRI core software development
• Strengthen water resources user community
• Book on GeoObject Model and its Application

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The Book Arc Hydrology Object Model

1. Introduction
2. GeoDatabase Modeling
3. River Network
4. Landscape and Watersheds
5. Channels and floodplains

1. Time Variation
2. Implementation Case Study (1)
3. Implementation Case Study (2)
4. Implementation Case Study (3)
5. Conclusions

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Goals for the Arc Hydrology Data Model
Linear Referencing on the River Network
ArcHydro
Dynamic modeling of water resources
Mapping of Hydrologic Features
General purpose geospatial database
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Arc Hydrology Data Model
Water Resources Model
GIS representation of the spatial data structure
of a water resources model
Water Modeling
Water movement and properties
The river system represented as a network of
flowlines on which location is defined
Linear Referencing
The water environment
Cartographic representation of water features on
maps
Water Mapping
ArcObject Model
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Complex Edge Object

• Edge is a concept from graph theory ( link in
  network)
• Can have interior nodes, interior junctions with
  other edges
• Will be used for a river reach between two
  tributary reaches

Gage
Hydraulic structure
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Concepts from Fluid Mechanics
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One-Dimensional Channel Flow System
Cross-Section
Flow Line
s
Stream Banks
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2-D and 3-D Flow Systems Flow Elements
Finite element mesh
Finite difference mesh
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Water Resources Objects

• Flowline - a line tracing the principal path of
  water movement through a flow system
• A streamline for a 1-D flow system
• Flow system an assembly of objects representing
  a region of space through which water flows
• A flow system could represent a channel, lake,
  bridge, watershed, aquifer, stream habitat zone,
  reservoir, ..

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Object Model of Rivers and Watersheds
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Supported Data Types for Eurotas Integrated
Catchment Model
TimeSeries Locations
Branches
Catchments
Cross Sections
Boundary Features
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3-Dimensional River Channel
ProfileLine
Each point has (x,y,z) coordinates
CrossSectionLine
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Geomorphic Classification of Rivers
Geomorphic province
Source Naiman and Bilby River Ecology and
Management Fig. 2.3, 1998
Watershed
Geomorphic units
Large woody debris
Valley Segment
Channel Reach
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Hierarchical Organization of a Stream and its
Ecological Habitats
Source Naiman and Bilby River Ecology and
Management Fig. 5.2, 1998
Segment
Riparian zone
Reach
Transect
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Lower West Fork, Trinity River Basin HUC
12030102
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(No Transcript)
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NHD River Reaches
412 River Reaches In Upper West Fork
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Water Body Reaches(Lakes and Ponds)
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DEM extracted from 1 NED
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Local Drainage Area for each Reach
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Incremental Watersheds for River Reaches
Accumulate incremental areas down the network to
get cumulative drainage areas
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River Reach Codes
Rch_Code 12030102000151
Rch_Code 12030102000005
Segment
HUC
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National Stream Addressing System
Location is described by what reach you are on,
and what distance along the reach you are
located at, e.g. 12030102000005, 67.2
0
Rch_Code 12030102000005
100
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Stream Addressing
Relative Addressing
0
67.2
100
1434 ft
Relative addressing is independent of units of
measure and more robust when changes of scale of
maps occur Absolute addressing is more common in
water resources models
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Direction of Stream Addressing
US Army Corps of Engineers, USGS (positive going
upstream)
River Stationing
0 feet or miles
Chainage
0 meters
Danish Hydraulic Institute (positive going
downstream)
There is no single, consistent, absolute
addressing system
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Colorado River Network
1100,000 scale Developed from National
Hydrography Dataset
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City of Austin Stream Network
Developed from 1100 Capco Areal
photogrammetry 11200 scale
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Colorado River at Mansfield Dam
From NHD 1100,000 scale
River Reaches
Lake Travis
City of Austin Stream network 11200 scale
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Synthesis of GIS and Hydrologic Modeling
GIS
Hydrologic Modeling
Environmental description
Process representation
Input
Data
Model
Results
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Linkage to Models
Water mapping
Flow Schematic
GIS Analysis
Flowlink
Export to Water Resources Model
Flownode
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Linking Temporal and Spatial Models
Hydrologic Simulation model
Time series data
Users
Real World
GIS
Spatial data
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Dealing with Time Variation
? Continuous time hourly, daily
t
? Steady state mean annual
t
? Seasonal monthly
t
Q
I
? Single event
t
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Space, Time, and Variables
A data value, D, is measured at spatial feature
L, at time T, for variable, V, and so it
exists in a 3-D space D(L, T, V)
Time
D
Variables
T
V
Space
L
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USGS Time Series Format
U.S.Geological Survey NWIS data Rdb data file
created 06/11/1999 1904 Columns in this file
include station USGS station number dd
Data descriptor, unique data base
identifier datetime date or date and time of
reading value value stored for this data
descriptor for this datetime 08176500 01 00060
DISCHARGE, IN CUBIC FEET PER SECOND station
dd datetime value 08176500 01
01/01/1998 1140.00 08176500 01
01/02/1998 1340.00 08176500 01
01/03/1998 1220.00 08176500 01
01/04/1998 1110.00 08176500 01
01/05/1998 1090.00 08176500 01
01/06/1998 1200.00 08176500 01
01/07/1998 1620.00 08176500 01
01/08/1998 2880.00 08176500 01
01/09/1998 3030.00 08176500 01
01/10/1998 2820.00
V
T
D
L