More than Just Lines on a Map: Best Practices for U.S Bike Routes
Presentation in ENTRO - Eastern Nile hydrological Work
1. The Application of the Soil Water Assessment
Tool (“SWAT”) in Easter Nile River Basin
Jorge Escurra
October, 2011
Ethiopia - Workshop, 2011
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2. ENPM seeks to encourage use of public-
domain modeling tools especially using
available public-domain global and local
datasets
Soil and Water Assessment Tool (SWAT)
is a popular tool for water modeling –
especially water balance assessments
LOGO
Ethiopia - Workshop, 2011
4. Solving a Problem
Disaster happened : DC - Irene
Hurricane (2011)
Webpage Models
GPS - Pictures/Photos
Or - Coordinates Lat and Long
Cell phones - Physical characteristics such as,,,,
- “Unique code” Database
“Update” –
autonomous way
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Ethiopia - Workshop, 2011
5. SWAT
Soil water Assessment Tool is a long term
continuous watershed simulation model.
It was developed by Jeff Arnold for the USDA
Agriculture Research Service (ARS) in 1998.
SWAT was developed to predict the impact of
land management practices on
water, sediment, climate change, and agriculture
chemicals yields.
Daily time steps.
Physically based (hydrology, plant
growth, nutrients, pesticides and land
management)
LOGO
Ethiopia - Workshop, 2011
8. How to Use SWAT
SWAT model allows users to:
• Use a GIS interface.
• Consider the topographical characteristics.
• Use Hydrological Response Units.
• Download and use open source code.
• Access SWAT2009.mdb
SWAT model uses the following equations
(SWAT Manual and J Schuol, 2005):
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Ethiopia - Workshop, 2011
9. SWAT Process - Bolivia
INPUT
Digital Elevation Model Basin delineation Climate data Soil types Land use
Kc
SWAT
Infrastructure dams and irrigation schemes
Crop calendar and agriculture practices
OUTPUT
Precipitation Evapotranspiration Sediments Water yield Soil water moisture
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Ethiopia - Workshop, 2011
