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The Effect of Riparian Zones on Nitrate Removal by Denitrification at the River Basin Scale
The riparian zone plays an important role in nitrogen removal, despite the minor proportion of the land area that it covers. The main objective of this thesis is to enhance the SWAT model by adding (i) a landscape routing concept across different landscape units, and (ii) a Riparian Nitrogen Model to simulate the denitrification process in riparian zones. Case study results show that SWAT_LS is able to evaluate the effect of denitrification in riparian zones, taking into account their specific locations as interfaces between terrestrial and aquatic ecosystems. These modifications enable the SWAT model to be used for flow and nitrogen modelling in riparian zones.
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