1 / 5

Effect of DEM Resolution on Global Hydrologic Derivatives

Effect of DEM Resolution on Global Hydrologic Derivatives. Jim Monty. Objectives. Utilize 2 or 3 different DEM resolutions to compare the effects on a model Investigate if there are differences based on the topology of the watershed (“flat”, “hilly”, “mountainous”). Flat (IN).

neal
Download Presentation

Effect of DEM Resolution on Global Hydrologic Derivatives

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Effect of DEM Resolution on Global Hydrologic Derivatives Jim Monty

  2. Objectives • Utilize 2 or 3 different DEM resolutions to compare the effects on a model • Investigate if there are differences based on the topology of the watershed (“flat”, “hilly”, “mountainous”)

  3. Flat (IN) Hilly (MI or SC) Au Sable Upper Wabash Mountainous (CO) • Upper Colorado

  4. Required Data • Watershed information • Moderate network of stream gauges • Rainfall data • Land Use/Land Cover • Other data dependant on model inputs??

  5. Methodology • At each resolution • Extrapolate rainfall amounts • Estimate land cover data (depending on method) • Use one year of data to validate the model • Track how long simulations take to run • Expectations • Resolution versus terrain type (how great are the improvements?) • Computation time (how do the improvements in resolution balance against computation needs?)

More Related