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Table 3 Compact summary of Catchment II

From: Natural attenuation along subsurface flow paths based on modeling and monitoring of a pesticide metabolite from three case studies

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"