Table 3 Compact summary of Catchment II
Crops and use history | ||||
|---|---|---|---|---|
Treated crops | Apples | |||
Application | 1996–2000; application in late spring and summer, BBCH growth stages > 60 | |||
Observation | ||||
Leachate sampling | none | |||
Position of monitoring wells | Immediately next to the treated field (downstream side) | Close to treated field | Middle of downstream area | Raw water abstraction well |
Distance of treated area to downstream monitoring wells [m] | < 10 | ~ 200 | ~ 400 | ~ 650 |
Geology/Lithology | ||||
Leaching profile | Holocene loam/clay loam (Cambisol) from relict high flood alluvium covering Pleistocene loamy sands | |||
Aquifer material | Quaternary fluviatile sand and gravel terraces | |||
Basement | Tertiary fine sediment layers composed of sand and clay of marine origin | |||
Location | Western Germany, Lower Rhine Bay | |||
Topography | Rhine plain (east of the river) with slope < 1°, agricultural land use | |||
Aquifer properties | ||||
Groundwater level below treated orchard [m] | 7.5–12.5 | |||
Thickness [m] | 16–22 | |||
Slope of aquifer [m]/[m] | 1/1100 | |||
Hydraulic conductivity [m/d] | 138–691 (mean 285) | |||
Dispersivity (longitudinal/vertical) [m]; [m] | Transport not simulated | |||
Used models | ||||
Leaching modeling | PEARL | |||
Aquifer modeling | "Bayerwerk Leverkusen" | |||