Linking satellite derived LAI patterns with subsoil heterogeneity using large-scale ground-based electromagnetic induction measurements

Abstract

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Estimation and Validation of RapidEye-Based Time-Series of Leaf Area Index for Winter Wheat in the Rur Catchment (Germany)

“…Using more precise and high resolution estimates of remotely sensed LAI in hydrological and radiative transfer models may improve soil moisture [85] and evapotranspiration retrieval [86]. Remotely sensed fine resolution LAI maps identify the field scale variability of vegetation and it could be used to identify the subsoil heterogeneity in addition to geophysical methods [59]. Moreover, the analysis of the red-edge spectral band impact to LAI estimation provides basic information also for the upcoming Sentinel-2 mission [87].…”

“…The area is covered with Quaternary sediments, mostly fluvial deposits from the Rhine/Maas River and the Rur river system [59]. They form the underlying sediments, whereas floodplain sediments belong to Pleistocene and Holocene sediments.…”

“…Difference in k(θ) is apparently due to the surface heterogeneity (in LAI) at both test sites. The Selhausen test field is more heterogeneous [59] as compared to the Merzenhausen site. Vegetation at the Merzenhausen test site is more homogeneous, healthier and dense, hence more light is trapped by the canopy causing higher k(θ) ( Table 4).…”

Monitoring and Modeling the Terrestrial System from Pores to Catchments: The Transregional Collaborative Research Center on Patterns in the Soil–Vegetation–Atmosphere System

“…Precipitation is continuously monitored at 5-min intervals by the twin dual-polarized X-band Doppler radars BoXPol in Bonn and JuXPol in Jülich on the Sophienhöhe (e.g., Ryzhkov et al 2014), a hill created from open-cast mining and jutting roughly 200 m out of the surrounding terrain. 2; for details, see von Hebel et al (2014) and Rudolph et al (2015)] showed a clear link between subsoil patterns of higher clay content originating from paleorivers (red dashed lines in Fig. The area is also covered by four C-band radars of DWD, which have been recently catchment (see Fig.…”

Validation of Spaceborne and Modelled Surface Soil Moisture Products with Cosmic-Ray Neutron Probes

“…In accordance with these local hydrogeological and climatic differences, land use and vegetation is clearly distinguishable: Forest and grassland characterize the south, whereas in the north fertile agricultural land predominates [76][77][78]. Soils can be locally very heterogeneous due to their origin in floodplain deposits and loess [79]. The Rur catchment is part of the Terrestrial Environmental Observatories (TERENO) network [80,81].…”