Mary lear l.jpg
This presentation is the property of its rightful owner.
Sponsored Links
1 / 15

Mary Lear PowerPoint PPT Presentation


  • 182 Views
  • Uploaded on
  • Presentation posted in: General

Mary Lear. Global Hydrology and Resampling Flow Direction Data April 22, 1999. Outline. Introduction Global Hydrology and Climate System Model Resampling Programs Methodology Interesting Concepts River Networks. Global Hydrology. Tele-Connections Interdisciplinary Studies .

Download Presentation

Mary Lear

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Mary lear l.jpg

Mary Lear

Global Hydrology and Resampling Flow Direction Data

April 22, 1999


Outline l.jpg

Outline

  • Introduction

    • Global Hydrology and Climate System Model

  • Resampling Programs

    • Methodology

    • Interesting Concepts

    • River Networks


Global hydrology l.jpg

Global Hydrology

  • Tele-Connections

  • Interdisciplinary Studies


Climate system model l.jpg

Climate System Model

National Center for Atmospheric Research (NCAR)

Boulder, Colorado

  • Predict greenhouse gas effects

  • Predict El Nino - La Nina

  • Precipitation-Evaporation

  • Deforestation changes

  • Ocean heating/cooling system

  • Historical Analysis


Model output l.jpg

Model Output

  • Model output from 6 year run with 1% of land surface accounted for as surface water


Ocean model l.jpg

Ocean Model

  • Compliments of LANL Parallel Ocean Program


Global river network l.jpg

Global River Network

  • Create manageable river network using fine resolution data

  • View of the world

    • Grid cells

    • Watersheds


Resampling programs l.jpg

Resampling Programs

  • Fine Resolution Flow Direction Data - 1 km

  • Coarse Resolution Output - 2.814°


Resampling methods l.jpg

Resampling Methods

  • Two Methods

    • Inverse Maximum

    • Maximum Flow Accumulation

  • Written in Arc Macro Language (AML)


Inverse method l.jpg

Inverse Method

  • Inputs

    • Flow Direction Grid

    • Scale Factor

    • Stream Delineation Threshold

  • Concept

1 ELEVATION

MAXFAC


Inverse method output l.jpg

Inverse Method Output

Fine Resolution River Network

Inverse Output, ~200 scale factor


Maximum method l.jpg

1

2

10

12

Maximum Method

  • Input

    • Flow Direction Grid

    • Projected Coarse Resolution Mesh

    • Checking Distance

1

2

FAC1

FAC2

10

12

  • Concept

FAC10

Downstream

FAC12


Maximum output l.jpg

Maximum Output

  • Export the PAT to Excel, Word

  • Generate Line Coverage


Future work l.jpg

Future Work

  • Examine Inverse Method Completely

  • Add perks to Maximum Method

    • Code for Continental Margin

    • Flowlength Column

  • Write Comparison


Appreciations l.jpg

Appreciations

Thank you

Jay Famiglietti

Francisco Olivera

Kwabena Asante


  • Login