Flow Time Time Series Hydro FeaturesHydro Network Channel System Drainage System ArcGIS Hydro Data Model

HEC tools and ArcHydro Flow Time Time Series Hydro FeaturesHydro Network Channel System Drainage System HEC-GeoHMS HEC-GeoRAS DSS National Hydro Data CWMS

GIS in Water Resources Consortium Bringing together these two communities by using a common geospatial data model GIS CRWR Water Resources

Arc Hydro Milestones Feb 1999 project initiated July 1999 Consortium established August 1999 kickoff meeting of Consortium Feb 2000 GIS in Water Resources Conference in Austin June 2000 First draft data model and book completed for GIS Hydro 2000 workshop in San Diego Dec 2000 NHD Applications Symposium in Austin Feb 2001 Arc Hydro design completed July 2001 Revised book to be completed for GIS Hydro 2001 workshop in San Diego

Geodatabase Book Series General Geodatabase in ArcInfo 8 Geodatabase models for application areas

CD-ROM at back of book ArcGIS Hydro UML diagrams, Repository, Example Geodatabases

ArcGIS Hydro Data Model Hydrography Hydrology

ArcGIS Hydro Implementation Geodatabase Feature Dataset Feature Class Geometric Network Object Class Relationship

GIS in Water Resources Consortium ArcGIS Hydro Data Model Feb 28, 2001 Hydro Features

GIS in Water Resources Consortium ArcGIS Hydro Data Model Feb 28, 2001 Hydro Network

GIS in Water Resources Consortium ArcGIS Hydro Data Model Feb28, 2001 Drainage

GIS in Water Resources Consortium ArcGIS Hydro Data Model Feb 28, 2001 Channels

GIS in Water Resources Consortium ArcGIS Hydro Data Model Feb 28, 2001 Time Series

National Hydro Data Programs National Elevation Dataset (NED) National Hydrography Dataset (NHD) Watershed Boundary DatasetNED-Hydrology

Watersheds of the US 2-digit water resource regions 8-digit HUC watersheds

Hydrologic Unit Code Watersheds ~ 2000 for US, about the size of counties

Watershed Hierarchy 8 HUC NED-H AvailableIn Progress Digit #

Watershed Boundary Dataset National Program by USGS and USDA (NRCS) Boundaries for 10- and 12- digit watersheds First cut is by automated delineation from NED Hand checked and edited 10-digit watersheds

National program by USGS and NWS 5000 cell threshold on a 30m DEM (~ 8 km 2 average drainage area) ~ 1 million catchments for US when completed Includes grid derived products e.g. topmodel index

EPA River Reach File 1 (RF1)

River networks for 8-digit HUC watersheds

Lower West Fork, Trinity River Basin HUC =

NHD River Reaches 412 River Reaches In Upper West Fork

River Reach Codes Rch_Code = Rch_Code = HUC# Segment#

National Water Information System Web access to USGS water resources data in real time

National Hydro Data Programs National Elevation Dataset (NED) National Hydrography Dataset (NHD) Watershed Boundary DatasetNED-Hydrology

How do we combine these data? DEMs WatershedsStreamsWaterbodies

An integrated raster-vector database

Data Model Based on Inventory NHD Points Gages NHD Areas NHD Lines Dams Bridges Make an inventory of all features of a given type in the region What is it? Where is it?

Data Model Based on Behavior Follow a drop of water from where it falls on the land, to the stream, and all the way to the ocean.

Integrating Data Inventory using a Behavioral Model Relationships between objects linked by tracing path of water movement

Where Does the Raindrop Go? Dale Honeycutt’s concept, May 2000

Water Flows from an Area to a Line Problems with this: Areas and lines are not always consistent with one another. Sometimes many lines within one area.

How to Connect Areas to Hydronetwork? Outlet Points Areas connect to lines at points Regardless of where the drop falls in the area, its runoff is on the network at the outlet point

Where Does the Raindrop Go? Watershed DEM Flow direction and DEM streams Drainage area and raindrop path

HydroNetwork Watershed and Stream Reaches Catchments and Outlet Junctions Downstream trace

Traces and Relationships Upstream Trace Selected Catchments + Downstream trace

Basins and Watersheds Upper Washita Basin (HUC8)10-digit watersheds and outlets Watershed

Downstream Trace Watershed NHD for the Upper Washita

Scales of Analysis Network for larger areas DEM for smaller areas (Up to 20 million cells)