Field comparison of selected methods for vertical soil water content profiling

Vienken, Thomas; Reboulet, Ed; Leven, Carsten; Kreck, Manuel; Zschornack, L.; Dietrich, Peter

doi:10.1016/j.jhydrol.2013.08.004

Cited by 16 publications

(7 citation statements)

References 26 publications

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“…The use of direct push was beneficial as the mobile direct push equipment could be maneuvered easily between existing building infrastructure and trees in public green spaces. Moreover, the advantage of direct push technology over conventional drilling techniques is that quasi-continuous in situ information about the vertical distribution of soil-specific properties, e.g., information about local stratigraphy and hydrogeological properties, can be rapidly obtained by attaching sensor probes at the end of the rod string; see Butler (2005), Dietrich and Leven (2006), Leven et al (2011), Vienken et al (2012Vienken et al ( , 2013 for further information on the used direct push tools.…”

Section: Site Investigationmentioning

confidence: 99%

Monitoring the impact of intensive shallow geothermal energy use on groundwater temperatures in a residential neighborhood

2019

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Households accounted for 25.4% of the final energy consumption in the EU 28 in 2016 of which almost 80% of that energy was used for space heating and warm water provision (see Eurostat 2018). At the same time, only 16% of the final energy consumption of households was derived from renewables, including the renewable part of waste (see Eurostat 2018). Hence, strengthening the share of renewables for space heating and warm water provision is an important piece of the puzzle for the decarbonization of the building sector that plays an important role in reducing global greenhouse gas emissions (Lucon et al. 2014). The use of shallow geothermal energy has increasingly received attention as suitable alternative to fossil fuel-based space heating and cooling, warm water provision, as well as for seasonal heat storage over the last 20 years, e.g., see Sanner (2017) for the development of the German ground source heat pump market. This is because ground source heat pump technology can readily be used to provide sufficient space heating during winter periods even at locations that are not favored by an

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Section: Site Investigationmentioning

confidence: 99%

Monitoring the impact of intensive shallow geothermal energy use on groundwater temperatures in a residential neighborhood

2019

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“…Seibertz et al [at http:// angusplus.de/en/publications/journal-articles (doi:10.1016/ j.jhydrol.2015.12.013)] additionally showed that small changes in lithology, composition and state of compaction have a strong impact on the thermal storage potential, stressing the need for reliable high resolution in situ measurement techniques. A quantitative assessment of established and emerging methods for vertical soil water content profiling and the connected determination of total porosity in the saturated zone was conducted by Vienken et al (2013). The yet little established direct push-based water content profiling method was identified as beneficial in terms of a high vertical resolution, time efficiency and a possible coupling with other direct push-based sensor probes.…”

Section: Characterization Of Heat Storage Sitesmentioning

confidence: 99%

“…Conversely, in times of low production, power shortages may occur, which have to be filled by backup energy. To bridge the gap between periods of excess wind or solar power, energy can be stored in periods of over production and retrieved when the demand exceeds production (VCI 2013). The operation of energy storage utilities can thus contribute to security of energy supply and to the economically viable use of renewable energies at high shares (70-90%) of the energy production (DENA 2014; Deutsche Akademie der Technikwissenschaften et al 2016;Agora Energiewende 2014;Pape et al 2014;Klaus et al 2010;Purr et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Energy storage in the geological subsurface: dimensioning, risk analysis and spatial planning: the ANGUS+ project

et al. 2016

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New techniques and methods for energy storage are required for the transition to a renewable power supply, termed ''Energiewende'' in Germany. Energy storage in the geological subsurface provides large potential capacities to bridge temporal gaps between periods of production of solar or wind power and consumer demand and may also help to relieve the power grids. Storage options include storage of synthetic methane, hydrogen or compressed air in salt caverns or porous formations as well as heat storage in porous formations. In the ANGUS? project, heat and gas storage in porous media and salt caverns and aspects of their use on subsurface spatial planning concepts are investigated. The optimal dimensioning of storage sites, the achievable charging and discharging rates and the effective storage capacity as well as the induced thermal, hydraulic, mechanical, geochemical and microbial effects are studied. The geological structures, the surface energy infrastructure and the governing processes are parameterized, using either literature data or own experimental studies. Numerical modeling tools are developed for the simulation of realistically defined synthetic storage scenarios. The feasible dimensioning of storage applications is assessed in sitespecific numerical scenario analyses, and the related spatial extents and time scales of induced effects connected with the respective storage application are quantified. Additionally, geophysical monitoring methods, which allow for a better spatial resolution of the storage operation, induced effects or leakages, are evaluated based on these scenario simulations. Methods for the assessment of such subsurface geological storage sites are thus developed, which account for the spatial extension of the subsurface operation itself as well as its induced effects and the spatial requirements of adequate monitoring methods.

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“…The study was conducted in an active clay and gravel pit (Vienken et al 2013), which is located in northern Saxony, Germany, close to the city of Taucha (Fig. 3).…”

Section: Study Sitementioning

confidence: 99%

Technique, analysis routines, and application of direct push-driven in situ color logging

et al. 2016

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Color data are a useful proxy for soil/sediment parameterization since they reflect material characteristics. We introduce direct push color logging for real-time and depth-resolved, in situ colorimetric record of colors in unconsolidated sediments in terrestrial environments. Until now, no routines exist on how to handle highly resolved (mmscale) data. To develop such routine, we transform colorimetric data (CIEXYZ) into color surrogates of selected color. We obtain interpretable color logs over depth by filtering with Haar and Daublet4 wavelet functions. We verify the approach, according to repeatability of in situ sediment color measurements, with related lithological determination gathered by state-of-the-art direct push-based cone penetration testing and soil sampling data. The developed routine is appropriate for unambiguous transformation of color data into interpretable color surrogates and filtering small-scale variability. We observe that soil color logs are repeatable and proved to correlate with lithological/chemical changes. Thus, the technique allows enhanced profiling by means of providing a reproducible high-resolution parameter for analysis of soil/ sediment characteristics. This opens potential new areas of application and new outputs for in situ-obtained colorimetric data in and beyond geotechnical site characterization.

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Field comparison of selected methods for vertical soil water content profiling

Cited by 16 publications

References 26 publications

Monitoring the impact of intensive shallow geothermal energy use on groundwater temperatures in a residential neighborhood

Monitoring the impact of intensive shallow geothermal energy use on groundwater temperatures in a residential neighborhood

Energy storage in the geological subsurface: dimensioning, risk analysis and spatial planning: the ANGUS+ project

Technique, analysis routines, and application of direct push-driven in situ color logging

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