Arc Hydro and the Regional Watershed
Modeling System in Texas
William Burmeister, P.E.
PBS&J, San Antonio, Texas
Pre Conference Seminars
1
Presentation Overview
• RWMS Background
• Data Management
• Key Components
– Interface Data Models
– Workbench
– Internet Portal
• Additional Tools
• Next Steps
Pre Conference Seminar
2
Watershed Data Management - Modular Solutions
Feature Maintenance
Standard Feature Maintenance Tailored Model Maintenance
The Digital Watershed (and Model Information System)
Note the digital watershed database has a standard design (schema), but different features within it are
used to describe different types of watersheds
Tier One: National
Standard
All Watersheds
are Modeled with
HEC Software
“Florida” Mixed Watersheds
Dendritic Watersheds
1
Smart Translator
Model Maintenance
Mixture of
Models, AdICPR,
SWMM5, etc.
RWMSHEC
Tier Two: Model
Specific Standards
DCS* and
DFIRM
Databases
RWMS Tools
Model Maintenance
2
HEC-RAS
HEC-HMS
3
Smart
Translators
RWMS SWMM5
AdICPR,
etc
4
Pre Conference Seminar
3
Regional Watershed Modeling System (RWMS)
• Developed by PBS&J for the San Antonio River Authority
– Contributions from UT Austin and Texas A&M University
• Will ultimately use an Arc Hydro compliant data model for
the underlying watershed and stream network
• Defines “Interface Data Models” for HEC-HMS and HECRAS
– Entire content of models ingested into an ArcGIS Geodatabase
Pre Conference Seminar
4
RWMS Concept
• Efficiently Manage Updates to Hydrologic, Hydraulic and
other Models
– Regional Integration
– Maintain “Current” Models
• Web Portal for End Users
– Checkout and submittal of models
– Management of study workflow
• Ensure Notification and Coordination
• Enforce Standards and Facilitate Study Review
Pre Conference Seminar
5
RWMS Data Management
Pre Conference Seminar
6
Underlying RWMS Database Concepts
GIS
Geo
Database
RWMS
Data Model
Interface
Data Models
Models
HMS
IDM
HMS
RAS
IDM
RAS
OTHER
IDMS
OTHER
MODELS
AND DATA
Pre Conference Seminar
7
RWMS Development Approach
• ESRI ArcGIS-Based
– Data Management: ArcSDE with SQL Server
– System Interaction: ArcGIS Desktop and ArcIMS
• Model Specific Geodatabases (IDMs)
– Manage, maintain and integrate models
• Administrator and End User Tools
– Administrator: Workbench (ArcGIS Desktop)
– End User: Web Portal (ArcIMS)
• Tools for Model Review and Integration
• Tools to Link Models
• Platform Independent for End User
Pre Conference Seminar
8
Feature Class Elements of HEC-HMS IDM
• HMS Basin Feature Class
• HMS Project Feature Class
– Gages
– Rainfall Grids
Pre Conference Seminar
9
HEC-HMS Interface Data Model
Pre Conference Seminar
10
Feature Class Elements of HEC-RAS IDM
Pre Conference Seminar
11
HEC-RAS Interface Data Model
Pre Conference Seminar
12
RWMS Version 1.0 - Key Components
•
•
•
•
•
Geodatabase (IDMs+)
Work Bench
Web Portal
Standards and Coordination Tools
Analysis and Visualization Tools
– Automated Floodplain Mapping
(Map2Map)
– Hydrograph Viewer
Pre Conference Seminar
13
RWMS Workflow Details
Study Review Workflow
Existing
Post
version
Checkout
Notification
Review per
Standards
Submittal
Regulatory
Review
Submittal of
As-built Version
(if needed)
Approval
Construction
Pre Conference Seminar
14
ArcGIS 9.2 RWMS Workbench
with ArcToolbox Tools for Model Management
• Administrators and
Internal Users
Pre Conference Seminar
15
Study Areas and Notification
• Hydrologic Study Area
• Initial Hydraulic Area
• Impacted Hydraulic Area
Pre Conference Seminar
16
Internet Portal for Study Management
Engineering Community End Users
Pre Conference Seminar
17
Model Check-out and Check-in
Pre Conference Seminar
18
Study Management and Coordination
Pre Conference Seminar
19
Automated Floodplain Mapping (Map2Map)
Using the Integrated Regional Models
• NEXRAD Rainfall
Figure 3: Bexar County IDF Curves
16
Series1
Series2
Series3
10-Year
25-Year
50-Year
100-Year
500-Year
14
Rainfall (inches)
12
• Design Storm
Rainfall
10
8
6
4
2
0
0
4
8
12
16
20
24
Duration (hours)
Pre Conference Seminar
20
Automated Floodplain Mapping (Map2Map)
Pre Conference Seminar
21
Next Steps for the RWMS
• Water Quality Modeling (HSPF)
– Prototype and database completed
• FEMA Compatibility
– LOMCs, Data Standards, Map Maintenance
• Enhanced Management of Support Data
– Documents, imagery, topography
• Flood Forecasting
• HEC-RAS Unsteady Flow Capabilities
• Integration of Other Models
– Hydrology/hydraulics, instream flow, etc.
• Enhanced Management, Review and Visualization Tools
Pre Conference Seminar
22