Description: Time-series of soil column soil moisture (down to 22.5 cm depth) estimated from networks of 5TE capacitance sensors at the three field site locations. Data is available from 2013-2019 for Voulund Farmland and Gludsted Plantation, and from 2014-2019 at Harrild Heathland.

Description: A handheld TDR soil moisture meter was used to map soil moisture in the area of the CRN detectors at the three field site locations. The measurements were made over the top 20 cm of the soil profile and each map consists of 121-163 measurement points collected within an area of 300-500 meters. Soil moisture was mapped 6-8 times at the three field sites in the period March to August 2016. Here, we provide the area average of the measurement points collected for each map.

Description: The dataset contains: 1) Cosmic-ray neutron (CRN) height profiles (of thermal and epithermal neutron energies) were estimated from bare and moderated detector measurements at three field site locations in the western part of Denmark. The measurements were collected in the period 2013-2015 and the field sites represent the three main land cover types in the catchment (i.e. agriculture "Voulund Farmland", forest "Gludsted Plantation" and heathland "Harrild Heathland"). The procedure to estimate thermal and epithermal neutrons from measurements of bare and moderated detectors is described in the manuscript submitted to WRR (title: "The effect of land cover on cosmic-ray neutron transport and soil moisture estimation"). One neutron height profile was measured directly using a cadmium shielded moderated neutron detector. 2) Time-series of hourly epithermal neutron intensity estimated from measurements of the bare neutron detector and/or the moderated neutron detector. For all three field sites, the data are collected at ground level (i.e. 1.5 m above the ground surface). The datasets are used to estimate soil moisture using the standard N0-calibration function and site-specific conversion functions determined based on neutron transport modeling (MCNP6). The soil moisture estimates are presented as daily moving averages. 3) A handheld TDR soil moisture meter was used to map soil moisture in the area of the CRN detectors at the three field site locations. The measurements were made over the top 20 cm of the soil profile and each map consists of 121-163 measurement points collected within an area of 300-500 meters. Soil moisture was mapped 6-8 times at the three field sites in the period March to August 2016. Here, we provide the area average of the measurement points collected for each map. 4) Time-series of soil column soil moisture (down to 22.5 cm depth) estimated from networks of 5TE capacitance sensors at the three field site locations. Data is available from 2013-2019 for Voulund Farmland and Gludsted Plantation, and from 2014-2019 at Harrild Heathland.

Description: The dataset includes all major terms of the water and energy balance at an agricultural field site in the western part of Denmark. Precipitation, recharge, evapotranspiration, latent heat flux, sensible heat flux, ground heat flux and net radiation is given as daily sums, while soil moisture content is given as daily moving average. Soil moisture content is measured by three different methods: 1) a point capacitance sensor (5 sensors at three depths) and a capacitance sensor network (30 sensors at three depths), 2) Time Domain Reflectometry (TDR) and 3) a cosmic-ray neutron sensor (CRNS). All measurements were collected in the period 2010-2015. The procedures of the measurements, including, measurement height and depths, is described in Denager et al, 2020.

Description: Cosmic-ray neutron (CRN) height profiles (of thermal and epithermal neutron energies) were estimated from bare and moderated detector measurements at three field site locations in the western part of Denmark. The measurements were collected in the period 2013-2015 and the field sites represent the three main land cover types in the catchment (i.e. agriculture "Voulund Farmland", forest "Gludsted Plantation" and heathland "Harrild Heathland"). The procedure to estimate thermal and epithermal neutrons from measurements of bare and moderated detectors is described in Andreasen et al (submitted). One neutron height profile was measured directly using a cadmium shielded moderated neutron detector.

Description: Time-series of hourly epithermal neutron intensity estimated from measurements of the bare neutron detector and/or the moderated neutron detector. For all three field sites, the data are collected at ground level (i.e. 1.5 m above the ground surface). The datasets are used to estimate soil moisture using the standard N0-calibration function and site-specific conversion functions determined based on neutron transport modeling (MCNP6). The soil moisture estimates are presented as daily moving averages.

Description: The data was collected in November, 2015 and consists of crosshole ground penetrating radar (GPR) data collected between two boreholes 3.367 m apart and down to approximately 8 m depth. The equipment used to collect the data was Sensors & Software pulseEKKO PRO equiped with 1000 V transmitter. The time window used is 340 ns, sampled every 0.4 ns, resulting in 850 samples per trace. Every trace is stacked 64 times to increase signal-to-noise ratio. Antennae frequency is 100 MHz. Both Zero-Offset Profiling (ZOP) data and Multiple-Offset Gather (MOG) data, with corresponding Calibration files, are available, both as raw data, but also picked travel times and amplitudes of the signal. The GPR data contains information on the one- and two-dimensional changes in electromagnetic properties between the boreholes.