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National Hydrography Dataset Applications Overview

National Hydrography Dataset Applications Overview. Symposium on Terrain Analysis for Water Resources Applications Austin, Texas December 16, 2002. 2. 1. 3. The National Hydrography Dataset Provides:. Rich cartographic feature content for making maps

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National Hydrography Dataset Applications Overview

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  1. National Hydrography Dataset Applications Overview Symposium on Terrain Analysis for Water Resources Applications Austin, Texas December 16, 2002

  2. 2 1 3 The National Hydrography Dataset Provides: • Rich cartographic feature content for making maps • A stream addressing system for linking water-related information to the national drainage network • Upstream/downstream modeling along the drainage network • Infrastructure for maintenance and enhancement

  3. NHD Modeling Components • Upstream and downstream navigation • Reach-to-reach relationships • Computed attributes • Reach drainage areas (catchments) connect the land surface to the drainage network • Flow volume and velocity for dilution modeling ( Watershed and Stream Characteristics Track, 9:30 – 5:00 Wednesday )

  4. (Draft)

  5. WATERS (Watershed Assessment, Tracking and Environmental ResultS) Total Waters Reach Characteristics Reach Address Database Permitted Dischargers Ask WATERS (Web Interface) 303(d) Events National Hydrography Dataset Impaired Waters & Total Maximum Daily Loads EnviroMapper for Water (Web Interface) TMDL Events NHD Reach Addressing Tools 305(b) Events Internet Nutrients 319 Events WQS Events STORET Events Water Quality Assessments Water Quality Monitoring (STORET) NHD Reach Addressing Tools Non-Point Source Grants Water Quality Standards Fish Advisories No-Discharge Zones Current Planned Drinking Water Supplies Recreational Beaches

  6. The Water Quality Standards Database contains information on the designated uses for water bodies, such as drinking water, swimming, and fishing. As part of a State's water quality standards, designated uses provide a regulatory goal for the water body and define the level of protection assigned to it. WATERS combines water quality information that describes the water bodies of the United States http://www.epa.gov/waters 2 1 EnviroMapper for Water is an Internet tool that displays these water bodies and associated water quality information (items 2-5). It enables users, from concerned citizens to environmental scientists, to view environmental data and make informed decisions. 3 The Water Quality Standards Database also contains the scientific criteria to support these designated uses. 4 The National Assessment Database contains information on the attainment of water quality standards. Assessed waters are classified as Fully Supporting, Not Assessed or Not Supporting their designated uses. 5 The Total Maximum Daily Load (TMDL) Tracking System contains information on waters that are Not Supporting their designated uses. TMDLs are pollution budgets used to restore the health of these impaired waters. The graphic above is for illustrative purposes only. The database reports shown do not necessarily describe actual water bodies displayed on the map. The water bodies identified through WATERS are those found on topographic maps as represented in the EPA/USGS produced National Hydrography Dataset (http://nhd.usgs.gov).

  7. AskWATERS

  8. AskWATERS Report for NPS Grants vs Impaired Waters Impaired Waters in Watershed 050400004 NPS Grants for Watershed 050400004 Overlap of Impaired Waters and NPS Grants

  9. For More Information • Watershed and Stream Characteristics Track, 9:30 – 5:00 Wednesday • Web Sites • NHD, http://nhd.usgs.gov • see NHD Applications link • WATERS, http://www.epa.gov/waters • Tommy Dewald, USEPA/Office of Water dewald.tommy@epa.gov

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