Arc Hydro Copyright © 2003 ESRI. All rights reserved. 3-1 Arc Hydro Tools  Arc Hydro tools  Key concepts  Global delineation – scaling issues  Tools overview  Walk-through

Arc Hydro Copyright © 2003 ESRI. All rights reserved. 3-2 Key Concepts  Transitions between the raster and vector worlds – integrated operations  “Relationships between objects linked by tracing path of water movement” RasterNetworkVector Logical SchemaExtended Network

Arc Hydro Copyright © 2003 ESRI. All rights reserved. 3-3 Terrain Processing Start with the terrain model Identify drainage patterns Identify catchments

Arc Hydro Copyright © 2003 ESRI. All rights reserved. 3-4 Network Generation Start with the drainage pattern Define hydro edges from drainage lines Generate junctions at confluences Build the geometric network

Arc Hydro Copyright © 2003 ESRI. All rights reserved. 3-5 Connecting Catchments to Junctions Start with the catchments Identify drainage points Link drainage points to junctions

Arc Hydro Copyright © 2003 ESRI. All rights reserved. 3-6 Extended (Hydrologic) Network Combination of hydro network and drainage areas connected through junctions. Allows tracing through network and selection on drainage areas

Arc Hydro Copyright © 2003 ESRI. All rights reserved. 3-7 Node-Link Schematization (1) Start with the catchments Find centroids Continue with drainge lines Find junctions Connect nodes

Arc Hydro Copyright © 2003 ESRI. All rights reserved. 3-8 Transition from geo representation to logical representation Node-Link Schematization (2) Support for various modeling efforts

Arc Hydro Copyright © 2003 ESRI. All rights reserved. 3-9  A set of tools that “exercises” the Arc Hydro model  Integral with standard ArcGIS functionality  Key field (property) management.  HydroID & related IDs  Length/Area measures  Core functions  DEM-based watershed delineation  Network generation  Attribute and network tracing and summary operations Arc Hydro tools overview (1)

Arc Hydro Copyright © 2003 ESRI. All rights reserved Arc Hydro tools overview (2)  Distribution (version 1.1 beta & constantly changing)  A toolbar with packaged menus and buttons  Supporting documentation/help  ApFramework  Simplify boring development tasks  Consistent development structure  Starting point for additional functionality development  ApUtilities  Set of utilities common to most ArcObject-based applications developed at ESRI Professional Services in water resources area

Arc Hydro Copyright © 2003 ESRI. All rights reserved  The Arc Hydro Toolbar  Terrain Preprocessing  Watershed Processing  Attribute Tools  Network Tools  ApUtilities  Buttons Arc Hydro tools overview (3)

Arc Hydro Copyright © 2003 ESRI. All rights reserved Arc Hydro tools overview (4)  Terrain Preprocessing  Set of functions for processing of DEMs  Preprocessing of DEM-based data needed for watershed delineation and watershed characteristics extractions

Arc Hydro Copyright © 2003 ESRI. All rights reserved Arc Hydro tools overview (5)  Watershed Processing  Set of tools for watershed delineation and characteristics extraction  Every menu has a Data Management form for setting up the layers to be used in operations associated with that menu (not required as each tool will request input and output data if necessary).

Arc Hydro Copyright © 2003 ESRI. All rights reserved Arc Hydro tools overview (6)  Attribute Tools  Set of tools for attribute management (some of the tools require geometric network)

Arc Hydro Copyright © 2003 ESRI. All rights reserved Arc Hydro tools overview (7)  Network Tools  Network specific tools

Arc Hydro Copyright © 2003 ESRI. All rights reserved Arc Hydro tools overview (8)  ApUtilities  Various utilities common to multiple applications

Arc Hydro Copyright © 2003 ESRI. All rights reserved  Buttons  Flowpath tracing  Point delineation  Batch point generation  Assign related identifier  Global point delineation  Trace by NextDownID Arc Hydro tools overview (9)

Arc Hydro Copyright © 2003 ESRI. All rights reserved HydroID – Cornerstone of Arc Hydro tools  Together with relationships, key element in operation of tools !

Arc Hydro Copyright © 2003 ESRI. All rights reserved Walk-through  Local delineation  Trace on the network using standard network tracing techniques  Trace using NextDownID  Accumulate  Schematization