Automated H&H and Advanced Terrain Processing Symposium on Terrain Analysis For Water Resources Applications Austin, TX December 16th – 18th , 2002 Joseph B. Chapman, PE, CFM Senior Vice-President Gray Minton, PE (not in TX) Senior Software Engineer Austin – Charlotte - Cary - Greensboro

Overview of Presentation Issues Related to Terrain Management Overview of WISE Terrain Processing Techniques Automated Hydrology Functions Automated Hydraulics Functions Automated Floodplain Mapping

Terrain Data and Management of Terrain is Key to any Automated H&H Process

IF YOU DON’T KNOW THIS YOU MUST HAVE BEEN ASLEEP FOR 2 DAYS! WHAT IS LIDAR? LIDAR = LIght Detection and Ranging 20-25 cm RMSE Accuracy Multiple LIDAR Returns Trees (canopy) Bare Earth Our acquisition strategy is based on the theme of capability, capacity and commitment. Our capability is defined by our choice of multiple return and high altitude LIDAR systems that make it possible for us to do the whole project in one flight season. Our capacity to accomplish this will be demonstrated later in the presentation with resources in reserve for contingencies. Our team made a commitment two months ago to develop a detailed “Command and Control Plan” which contains completed flight plans and mobilization protocols for coordination and communication. We are already organized down to the last detail, including the names and phone numbers of aircraft mechanics and fuel vendors at each of the eight North Carolina airports we have identified as base stations. When I say we are ready to go upon Notice to Proceed, I mean we are ready to put airplanes in the air. IF YOU DON’T KNOW THIS YOU MUST HAVE BEEN ASLEEP FOR 2 DAYS!

How Much Data is LIDAR Data? LIDAR Points

How Much Data is LIDAR Data? One (1) Project Tile: 20k x 20k (14 Square Miles) 950,000 Mass Points 215 MB Shape File

How Much Data is LIDAR Data? 1,228 Tiles in Phase I !! (4 Eastern Watersheds)

Here’s Where We Store It!

What is WISE? Tool for managing and utilizing data for watershed studies Provides integration of GIS and standard engineering calculation programs Modules for: Terrain Storage Inventory Management Hydrologic Analysis Closed System Analysis Open Channel Analysis Water Quality Analysis Master Planning This is primarily an engineering project, however terrain data development is critical to achieving the project schedule. We have designed an approach to acquire all of the terrain data for the first six watersheds in one flight season. We are ready to fly immediately if selected. PAUSE. Our team has capability and experience in all of the remote sensing technologies noted in the RFQ, notably photogrammetry, IFSAR and LIDAR. Based on our understanding of the technical requirements, schedule and budget, LIDAR is our technology of choice.

WISE is Based on? Written in Visual Basic with a few DLL’s in C. Based on ESRI’s MapObjects Interfaces with Standard Calculation Engines WISE IS NOT A MODEL This is primarily an engineering project, however terrain data development is critical to achieving the project schedule. We have designed an approach to acquire all of the terrain data for the first six watersheds in one flight season. We are ready to fly immediately if selected. PAUSE. Our team has capability and experience in all of the remote sensing technologies noted in the RFQ, notably photogrammetry, IFSAR and LIDAR. Based on our understanding of the technical requirements, schedule and budget, LIDAR is our technology of choice.

WISE Terrain Module The Terrain module in WISE is an integrated suite of tools that: Imports terrain data in numerous different formats Stores and provides quick access to very large amounts of data Combines terrain data based on user-assigned priorities Generates TIN’s and DEM’s Hydrologically corrects the terrain data Provides the foundation for tools in other modules such as basin delineation and cross section takeoff

WISE Terrain Import WISE allows the user to import terrain data in numerous formats, including: LIDAR data AutoCAD DXF’s Numerous ASCII formats WISE stores all of this data in a unique storage system with unlimited storage capacity.

WISE currently stores complete TIN for 15,000 Square miles and growing WISE currently stores complete TIN for 15,000 Square miles and growing! (4 + billion points) TINs that will be established during the first phase of the projedfct

Blending of Terrain Data WISE allows the user to combine multiple different types of terrain data based on user-defined priorities

TIN and DEM Generation WISE creates TIN’s from the blended terrain data WISE also creates DEM’s, which are later used during the hydrological correction process. These DEM’s can be exported for use in other programs such as ArcView. Once new Terrain data becomes available, TIN’s can be regenerated for an area without having to recreate the whole model

Hydrological Correction Typically the most time-consuming part of the project WISE speeds up this process dramatically by automatically fixing sinks, peaks, and flat areas using its own program, FAUCET Advantages of FAUCET Allow for use of unlimited size data sets by tiling data Handles negative values Extra precision has been added (not critical for NED Data) Doesn’t Fill Sinks! – This is important in preserving integrity of as much of the data as possible

Example FAUCET Correction

Tools that use the Terrain Output Hydrology: Raindrop Tool, Drainage Area Tracking, Basin Delineation, Time of Concentration Calculation Hydraulics: Cross Section Placement, Cross Section Takeoff Water Quality: Spill Response Modeling

Compatibility/Usability of Results Manage TIN in WISE – export to any program that accepts dxf or shapefile Generate a hydrologically correct DEM that can be used by any program that can except standard data formats Standard GIS and CADD programs do not have to store the data

Automated Hydrology Tools WISE has numerous tools that help a user manage and create hydrologic data including: Automatic Basin Delineation Automatic Time of Concentration Calculation Curve Number Calculation HEC-1/TR-20 model creation

Basin Delineation WISE will allow a user to automatically delineate basins based on a target basin size

Time of Concentration Calculation WISE will automatically determine the longest TC for a basin based on longest flow length or longest flow time WISE currently allows the user to calculate TC’s based on 5 different methods, including SCS TR-55 WISE also determines Routing Time of Concentration flowpaths, and calculates the stage/storage curves for each routing

Curve Number Calculation WISE will calculate Curve Numbers for a given set of basins

Hydrologic Model Creation WISE will automatically create a complete hydrologic model for a given area

Metadata Already Created Tracking How Model was Created!

Automated Hydraulic Tools WISE has numerous tools that help a user manage and create hydraulic data including: Automatic Cross Section Placement Cross Section and n-value takeoff HEC-RAS model creation Floodplain mapping Flood profile creation

Automatic Cross Section Placement

Manual Cross Section Edits

Survey Data Import

Feature Code Library Add notes on how we collect the data. Standard Code Library has been used for thousands of structure surveys

HEC-RAS Model Creation

Floodplain Mapping

Efficient Management of Terrain Data Make All These Other Processes Possible Hydrology: Raindrop Tool, Drainage Area Tracking, Basin Delineation, Time of Concentration Calculation Hydraulics: Cross Section Placement, Cross Section Takeoff Water Quality: Spill Response Modeling

QUESTIONS? www.watershedconcepts.com www.ncfloodmaps.com Austin – Charlotte - Cary - Greensboro