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The National Hydrographic Dataset As the Basis for Idaho ’ s Water Data. Zach Maillard GIS Analyst Idaho Dept. Of Water Resources. Overview. Acquiring and Processing NHD Incorporating Existing Water Right Data Into NHD NHD Network Analysis Integrating Real Time Stream Gauge Data Into NHD

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The national hydrographic dataset as the basis for idaho s water data

The National Hydrographic Dataset As the Basis for Idaho’s Water Data

Zach Maillard

GIS Analyst

Idaho Dept. Of Water Resources


Overview
Overview

  • Acquiring and Processing NHD

  • Incorporating Existing Water Right Data Into NHD

  • NHD Network Analysis

  • Integrating Real Time Stream Gauge Data Into NHD

  • Future Projects


Acquiring the national hydrographic dataset nhd
Acquiring The National Hydrographic Dataset (NHD)

  • Download each Basin (85 for Idaho)

  • Each Basin Is In Personal Geodatabase format


Processing the nhd
Processing the NHD

  • Append

    • Incorporate each basin into one statewide dataset

  • Re-Project

    • NHD is distributed in Geographic NAD 83.

    • IDWR uses Idaho Transverse Mercator

  • Load Into ArcSDE

    • Maximum size of Personal Geodatabase: 2GB

  • Clean data

    • Remove duplicate arcs

    • Remove overlapping hydrologic basins

    • Verify network connectivity between basins


Nhd issues
NHD Issues

  • Editing the NHD

  • Missing 2 ½ NHD basins (Jordan Creek, Lower Snake/Asotin, and part of Lake Pend Oreille)

  • NHD data quality

    • Names

    • Canal Names

    • Gaps in network



Using the nhd as a water right framework
Using The NHD As A Water Right Framework

  • Extending the NHD to handle water rights

  • A water right consists of two (spatial) components

    • Point of Diversion (POD): Diversion from live flow.

    • Place of Use (POU): Area where the water will be used.


Adding existing water rights to nhd

Before Snap

After Snap

Adding Existing Water Rights To NHD

  • Attach points to network

    • Current framework is 100K streams, and GCDB. Need to migrate those points to the more detailed 24K stream network.



Network analysis

Stream Showing Flow Direction

Network Analysis

  • Flow direction

    • Can model water flow


Network analysis tasks trace downstream

Trace Results: All Segments

Downstream of Flag

Network Analysis TasksTrace Downstream

Place Network Flag


Network analysis tasks trace downstream1
Network Analysis TasksTrace Downstream

  • Follows stream flow direction to the lowest point in the system basin

    • In Idaho can trace downstream from Palisades Res. on the Snake River at the Wyoming border, to the Snake/Clearwater River confluence in Lewiston


Network analysis tasks trace downstream2
Network Analysis TasksTrace Downstream

Snake/Salmon

Confluence

Palisades Res.


Network analysis tasks find upstream accumulation

Trace Results: All Stream

Segments Upstream Of Flag

Are Selected

Place Network Flag

Network Analysis TasksFind Upstream Accumulation


Network analysis tasks find upstream accumulation1
Network Analysis TasksFind Upstream Accumulation

  • Find all segments upstream of a network flag

    • Can be used to find all Point of Diversions upstream from a location of a new water permit application.

    • Find the oldest priority date above a diversion.


Using the nhd as a water right framework1
Using The NHD As A Water Right Framework

Find Total Upstream Diversion Rate


Using the nhd as a water right framework2
Using The NHD As A Water Right Framework

All Diversions Upstream Of Network Flag


Using the nhd as a water right framework3
Using The NHD As A Water Right Framework

Results: Selected Diversions and Total Diversion Rate


Real time gauge information
Real Time Gauge Information

  • USGS

    – NWIS Web

  • Bureau Of Reclamation

    • Hydromet: Stream Gauges

    • Hydromet: Lake levels and storage

  • Idaho Power

    • Lake levels in Hells Canyon

    • Stream Gauges


Integrating stream gauge into nhd
Integrating Stream Gauge Into NHD

  • View stream flow in real time

  • Use data stored from multiple internet sources as a single GIS layer

  • Can be used to verify upstream diversion rates


Real time gauging station data
Real Time Gauging Station Data

Bureau of Rec. Gauging Stations and NHD


Real time gauging station data1
Real Time Gauging Station Data

Retrieving Gauging Stations Attributes In ArcMap


Real time gauging station data2
Real Time Gauging Station Data

Retrieving Gauging Stations Charts In ArcMap


Reservoir data
Reservoir Data

Retrieving Reservoir Storage Data In ArcMap



Future projects
Future Projects

  • Migration From ArcView 3.x to ArcGIS

    • Desktop/Server/Engine?

  • Web-based Water Right Applications

    • Have applicant create digital boundary of POU on the web.

    • Digitize POD on screen


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