Environmental Engineering Reference
In-Depth Information
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Water
0-0.005
0.005-0.1
0.1-0.4
0.4-2.0
>2.0
Figure 5.11
Spatial and temporal distributions of soil erosion in Eurasia and north Africa (mmmonth
-1
).
environmental modelling. Thus, robust algorithms or
simulators are needed to combine various datasets to
produce unified consistent environmental parameters
for spatial modelling.
•
There are mainly two purposes of upscaling a model
to regional or global scales. One is to derive the spatial
distribution of our interests while the second is to
calculate a single value in a large area. The output
modelled on the basis of a distributed dataset may
just represent the spatial distribution of the result in
the resolution of dataset. In many cases, the sum of
the spatially distributed output cannot be taken as the
value in a whole region (globe) since the spatial and
temporal interaction and feedback of the processes may
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