ArcHydro the industry-adopted data model for water resources, opens the way to building hydrologic information systems that synthesize geospatial and temporal water resource data to support hydrologic analysis and modeling. The ArcHydro Data Model can be defined as a geographic database containing a GIS representation of a Hydrologic Information System under a case-specific database design that is extensive, flexible, and adaptable to the user’s requirements.

EPA’s STORET and Enviromapper: GDM can increase the level of accuracy, for much of the data listed in the Enviromapper application, from 1:100,000 scale down to 1:24k or better. This will bring all data to similar map accuracy standards. The datasets include Surface Water Monitoring Stations, Ground Water Monitoring Stations, (Others), and air monitoring stations.

USGS NWIS DATA: The National Water Information System (NWIS) provides access to water-resources data collected at approximately 1.5 million sites in all 50 states. NHD is the key to link these datasets, creating a geodatabase to increase your agencies’ application and modeling capabilities. Link millions of datasets from the following databases: Surface Water, Ground Water and Water Quality.

USDA APPLICATIONS: CAFO (Concentrated Animal Feeding Operations) compliance requires ranching operations, or agencies that monitor livestock, to deal with a growing mountain of regulations, compliance and reporting issues. NHD helps ensure that National Pollutant Discharge Elimination System (NPDES) permits conform to the CAFO regulations. NHD is also esstenial for analysis of agricutural pesticide runoff, monitoring, and risk analyses.

Production of High-Resolution NHD: GDM is one of the nations most experienced, accurate and affordable providers of high-resolution 1:24,000 NHD. GDM produces high resolution NHD data for USGS for the State of Texas as a prime contractor under the Strategic Mapping Program (StratMap). To date, GDM has completed over 130 8-digit sub basins with a first-time acceptance rate better than 99%, for over 8% of the United States.