Environmental Engineering Reference
In-Depth Information
Present
Production
Land Cover Classes
Row Crops
Strip Intercropping
Perennial Herbaceous Cover
Woodland / Woody Cover
Water / Wetland
Urban / Residential / Roads
Water Quality
Biodiversity
Fig. 10.16 Present landscape (top right) and alternative future scenarios for the Walnut Creek catchment area in Iowa, USA.
In comparison to the present situation, note the increase in row crops at the expense of perennial cover in the Production
scenario. In the Water Quality scenario, note in particular the increase in perennial cover (pasture and forage crops) and
wider riparian buffers. Finally in the Biodiversity scenario, note the increase in strip intercropping, the wide riparian
buffers and the extensive prairie, forest and wetland restoration reserves. (From Santelmann et al., 2004.) (This fi gure also
reproduced as color plate 10.16.)
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