ABE 6254
Simulation of Agricultural Watershed Systems
Outline for Critique of Models
This paper is to be done individually, not in your model
team groups. Your model critique paper should include, but not necessarily
be limited to, the following information.
I. Model comparisons
Compare and discuss the models presented in class (FHANTM,
Opus, EAAMOD, ACRU2000, WAM, SWAT2000) with respect to the following
characteristics and processes: time scale, spatial approach,
areal scope, intended uses, infiltration, runoff, evapotranspiration,
subsurface flow, erosion, nutrients, pesticides, and other aspects of
your choice.
--How would you describe the different approaches to simulation
of the hydrology with these models?
--List a variety of potential best management practices (BMPs)
for control of sediment and nutrients. How, and to what extent, can
the effects of these BMPs be accounted for in the different models?
II. Runoff relationships
In terms of runoff volumes and the timing of runoff from a continuous
model, discuss the physical limitations of each model used in class.
--Which model(s) would be most appropriate for use in a moderate
to highly sloped field that has silty clay soils? Why? What are
the potential concerns in such an area? How well does each model address
them?
--Which model(s) would be most appropriate for use in a low
sloped field that has sandy, high-water-table soils? Why? What
are the potential concerns in such an area? How well does each model
address them?
--What if anything, in your opinion, should be added to these
models (and is not currently in any of them) to make continuous simulation
more physically realistic? If nothing why not, and if so, what effect do you
think this would have?
III. Model applicability
Rank the models used in class in order of their applicability
to a broad range of field situations (according to the model’s generality).
Justify your answer by listing some reasons why some models are more broadly
applicable than others.
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