1 / 9

Runoff Generation and Routing in the TOPMODEL

Runoff Generation and Routing in the TOPMODEL. Venkatesh Merwade. Recap. E. Overland Flow. Gravity Zone. Saturated Zone. P. Root Zone. R. Soil Moisture Deficit. Key Points. Z i (The distance between the land surface and the groundwater table) Topographic Index

rozene
Télécharger la présentation

Runoff Generation and Routing in the TOPMODEL

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. Runoff Generation and Routingin the TOPMODEL Venkatesh Merwade

  2. Recap E Overland Flow Gravity Zone Saturated Zone P Root Zone R Soil Moisture Deficit

  3. Key Points • Zi (The distance between the land surface and the groundwater table) • Topographic Index • Drainage Area (Contributing area)

  4. Topographic Index • What is Topographic Index ? • x = ln(a/tanb) • a = A/(nL) • Index Curve • It defines the percentage of the total drainage area that contributes to the surface runoff.

  5. Index Curve Area Ln(a/tanb)

  6. Run off Generation ContributingArea Still No Runoff! GroundSurface Zi Water Table Z To Outlet Channel Datum

  7. Runoff Generation Cont’d

  8. Routing • The transfer component is divided into two phase • Overland flow within the contributing area which is routed at a velocity proportional to the local gradient with overland flow velocity constant. • Flow to the outlet

  9. The saturation excess and the overland flow is routed through a routing model to get the resulting run-off. Routing cont’d Saturation excess and Overland flow Channel (Linear Routing) Runoff

More Related