Soil water sensing for water balance, ET and WUE

Evett, Steven R.; Schwartz, Robert C.; Casanova, Joaquin; Heng, Lee

doi:10.1016/j.agwat.2011.12.002

Cited by 145 publications

(96 citation statements)

References 37 publications

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“…For example, in our study EnviroSCAN ® sensors were used to measure the profile water content. The probes were properly calibrated during installation; however, measurements with capacitance probes are highly variable and sensitive to bulk electrical conductivity, temperature, and change in storage estimates [48]. The capacitance sensors used in access tubes may generate consistent errors ≤ 0.05 cm 3 cm -3 , which is similar to the variation observed in our study between EnvironSCAN measured and simulated values.…”

Section: Comparison Of Error Indicessupporting

confidence: 77%

Statistical Assessment of a Numerical Model Simulating Agro Hydrochemical Processes in Soil under Drip Fertigated Mandarin Tree

Skewes¹

2015

Irrigat Drainage Sys Eng

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Section: Comparison Of Error Indicessupporting

confidence: 77%

Statistical Assessment of a Numerical Model Simulating Agro Hydrochemical Processes in Soil under Drip Fertigated Mandarin Tree

Skewes¹

2015

Irrigat Drainage Sys Eng

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“…All components of the water balance (e.g., precipitation, evapotranspiration, runoff, soil water content) are continuously monitored using state-of-the-art instrumentation, providing detailed information about the spatial and temporal variation of the local water cycle for the evaluation of hydrological models (Bloschl and Sivapalan, 1995;Thompson et al, 2011). In addition, using water balance data within the context of hydrological modeling helps to determine measurement errors, to diagnose such errors, and to avoid misattribution of water balance components (Evett et al, 2012;Kampf and Burges, 2010;Vasilenko, 2004). Finally, quantification of water balance components is helpful for understanding the availability of water resources, the potential of hydrologic extremes such as floods and droughts, and the interactions between the land surface and the atmosphere (Flerchinger and Cooley, 2000;Huntington, 2006).…”

Section: Introductionmentioning

confidence: 99%

The integrated water balance and soil data set of the Rollesbroich hydrological observatory

Bogena

Huisman

et al. 2016

Earth Syst. Sci. Data

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Abstract. The Rollesbroich headwater catchment located in western Germany is a densely instrumented hydrological observatory and part of the TERENO (Terrestrial Environmental Observatories) initiative. The measurements acquired in this observatory present a comprehensive data set that contains key hydrological fluxes in addition to important hydrological states and properties. Meteorological data (i.e., precipitation, air temperature, air humidity, radiation components, and wind speed) are continuously recorded and actual evapotranspiration is measured using the eddy covariance technique. Runoff is measured at the catchment outlet with a gauging station. In addition, spatiotemporal variations in soil water content and temperature are measured at high resolution with a wireless sensor network (SoilNet). Soil physical properties were determined using standard laboratory procedures from samples taken at a large number of locations in the catchment. This comprehensive data set can be used to validate remote sensing retrievals and hydrological models, to improve the understanding of spatial temporal dynamics of soil water content, to optimize data assimilation and inverse techniques for hydrological models, and to develop upscaling and downscaling procedures of soil water content information. The complete data set is freely available online (http://www.tereno.net, doi:10.5880/ TERENO.2016.001, doi:10.5880/TERENO.2016.004, doi:10.5880/TERENO.2016 and additionally referenced by three persistent identifiers securing the long-term data and metadata availability.

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“…This comparison resulted in a RMSD of 0.025 cm 3 cm -3 between soil water contents measured by TDR and those estimated by gravimetry (Beyrich and Mengelkamp 2006). In other studies, corresponding RMSD values ranged from 0.01 to 0.05 cm 3 cm -3 (Wegehenkel 2005, Paige and Keefer 2008, Abbas et al 2011, Evett et al 2012. Therefore, it is unlikely that significant measurement errors by TDR probes are a reason for these discrepancies between simulated and measured soil water contents at 45, 60 and 90 cm depth.…”

Section: Hydrus-1dmentioning

confidence: 92%

Modelling hourly evapotranspiration and soil water content at the grass-covered boundary-layer field site Falkenberg, Germany

Wegehenkel

Beyrich

2014

Hydrological Sciences Journal

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The study analyses a 2-year period of hourly rates of real evapotranspiration (ETr) derived from eddy covariance measurements and soil water contents at depths from 8 to 90 cm, monitored by time domain reflectometry probes at the grass-covered boundary-layer field site Falkenberg of the Lindenberg Meteorological Observatory -Richard-Aßmann-Observatory, operated by the German Meteorological Service (DWD). The ETr rates and soil water contents were compared with the results of a modelling approach consisting of the Penman-Monteith equation and the soil water balance model Hydrus-1D using a noncompensatory and a compensatory root-water uptake model. After optimization of soil hydraulic parameters by inverse modelling, using measured soil water contents as the objective function, simulated and measured model outputs showed good agreement for soil water contents above 90 cm depth and for ETr rates simulated by our modelling approaches using noncompensatory root-water uptake. The application of a compensatory root-water uptake model led to a decrease in the simulation quality for the total investigation period.

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Soil water sensing for water balance, ET and WUE

Cited by 145 publications

References 37 publications

Statistical Assessment of a Numerical Model Simulating Agro Hydrochemical Processes in Soil under Drip Fertigated Mandarin Tree

Statistical Assessment of a Numerical Model Simulating Agro Hydrochemical Processes in Soil under Drip Fertigated Mandarin Tree

The integrated water balance and soil data set of the Rollesbroich hydrological observatory

Modelling hourly evapotranspiration and soil water content at the grass-covered boundary-layer field site Falkenberg, Germany

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