2.2.5 Model scenarios
The verified model was used to study the nitrogen cycle in the riparian
zone under the coexistence of water level fluctuation and
other factors at the site. The amplitude and duration of the water
level fluctuation are A =0.6m, T =3d respectively.
The initial groundwater level (7.74m) was assigned of the average base
flow water-level at the site from 2014 to 2015. This paper aims to
explore the methods and principles of improving the denitriding capacity
in the riparian zone from many aspects. For example, biological method
such as adding denitrifying bacteria into the aquifer; chemical
methods include increasing DOC concentration of surface water
and groundwater; hydrogeological methods include enhancing hydrological
connectivity and initial surface water-groundwater hydraulic gradient;
topography methods include changing the slope and concave and convex
shape of the bank. All the numerical test cases are shown in Table 2.