Outline 1.Introductions 2.What is the NHD? 3.Why is it important to Tribes?

Kimberly Johnston-Dobbs Christina Boggs Carol Ostergren National Geospatial Program Hank Nelson Technical NHD Lead USGS Contacts

What is the NHD and why is it important to Tribes?

What is the National Hydrography Dataset? Essentially the surface water features found on topographic maps

High Resolution National Hydrography Dataset Statistics Area FeatureKm 2 Mi 2 # Features Lakes 1 134,07351,7666,237,938 Rivers 2 49,74119,205 Water Plants 3 2, ,447 Swamp/Marsh 4 107,17641,381942,072 Ice Mass69,23626,73321,643 Inundation Area 5 10,3523, Not including the Great Lakes 2 - Including only river polygon area, not single-line river area 3 - Typically water filtration, sewage treatment, fish hatcheries 4 - Based on USGS topographic mapping standards – not National Wetland Inventory 5 - Difference between normal pool area of lakes and area at spillway height

High Resolution National Hydrography Dataset Statistics Linear FeatureKmMiAdditional Data Streams 1 10,463,1366,501,479 Perennial 5 – 3,207,571 Km Intermittent 5 – 7,190,124 Km Artificial Path 2 1,139,929708,318 In River ~ 353,378 Km In Lake ~ 638,360 Km Canal/Ditch528,909328,648 Water Pipeline16,82610,455 Connector 3 29,70618,458 Coastline 4 151,70594,265 1 – Generic, perennial, and intermittent single-line streams 2 – Linear pathway distance through lakes, river polygons, canal polygons, and some marsh/swamp 3 – Pathway known to exist, but not seen on imagery 4 – Including Great Lakes 5 – Not conclusive

Streams – Creating the fundamental network Swan Creek Perennial Intermittent Ephemeral

Flow Direction – Providing intelligence to the data

Navigation – The basis for analysis

Navigation – Where does a toxic spill go?

Reach Reach Linear Referencing – Stream “Reaches”

Linear Referencing – Stream addresses

USGS Streamgage Address: Reach – Measure – Coordinate W N Linear Referencing – Data “Events”

The river gains intelligence about streamflow

Connecting the streamgage to the network Streamgage Dam Blue River Artificial Path (Blue River) Green Mountain Reservoir

Dams and Streamgages Integrated with the NHD

nationalmap.gov

The National Map Hydrography Elevation Orthoimagery Transportation Structures National Hydrography Dataset Watershed Boundary Dataset Lakes Streams Fish Habitat Chemistry Cutthroat Trout Map Portal

PASSAGE BARRIERS IN CALIFORNIA

Flow volume estimates in the NHDPlus do not account for diversions NHDPlus estimates only natural stream flow Colorado River Photo courtesy of Jonathan Waterman

Trans - Basin Diversions Subregional Regional Subbasin 3 Levels

Inter- Regional

Colorado River Aqueduct Diversion 242 miles long 1.2 million acre-feet per year Colorado River Aqueduct Diversion 242 miles long 1.2 million acre-feet per year

Inter- Subregional

California Aqueduct 444 miles long 2.6 million acre-feet per year California Aqueduct 444 miles long 2.6 million acre-feet per year Inter- Subregional

Inter- Subbasin

California Diversions

32 A cartographic curiosity - Any guesses what this is? Thank for your attention this afternoon! More info at