|1||Behrendt et al., 1999||
Basing on MS-Excel with a temporal resolution of a 5-year-mean, spatial resolution > 500 km².
|2.01 to 2.15.008||
Basing on VBA, temporal resolution yearly with the possibility to disaggregate to monthly values. Differentiation of tile drainages and nitrogen surplus under grassland and under arable land. Spatial resolution at least 50 km².
|3.0||Venohr et al. 2011||
Basing on C#; temporal resolution: yearly, basing on monthly input data. Hydrologic module was adjusted to calculate negative water balances.