The geothermal potential of cities

Renewable and Sustainable Energy Reviews, Journal Year: 2019, Volume and Issue: 106, P. 17 - 30

Published: Feb. 27, 2019

Language: Английский

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Global patterns of shallow groundwater temperatures

Environmental Research Letters, Journal Year: 2017, Volume and Issue: 12(3), P. 034005 - 034005

Published: Feb. 10, 2017

Only meters below our feet, shallow aquifers serve as sustainable energy source and provide freshwater storage ecological habitats. All of these aspects are crucially impacted by the thermal regime subsurface. Due to limited accessibility however, temperature measurements scarce. Most commonly, groundwater temperatures approximated adding an offset annual mean surface air temperatures. Yet, value this is not well defined, often arbitrarily set, rarely validated. Here, we propose usage satellite-derived land instead 2 548 measurement points in 29 countries compiled, revealing characteristic trends between Here it shown that evapotranspiration snow cover impact on globally, through latent heat flow insulation. Considering two processes only, global estimated a resolution approximately 1 km × km. When comparing with measured ones coefficient determination 0.95 root square error 1.4 K found.

Language: Английский

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Groundwater fauna downtown – Drivers, impacts and implications for subsurface ecosystems in urban areas

Journal of Contaminant Hydrology, Journal Year: 2022, Volume and Issue: 248, P. 104021 - 104021

Published: May 11, 2022

Groundwater fauna (stygofauna) comprises organisms that have adapted to the dark subterranean environment over a course of thousands and millions years, typically having slow metabolisms long life cycles. They are crucial players in groundwater oxygenic aquifers, contribute various ecosystem services. Today's knowledge their sensitivity anthropogenic impacts is incomplete critical analysis general relevance local findings lacking. In this review, we focus on those areas with highest interference between humans stygofauna: cities. Here where pollution by contaminants heat strongly stresses unique ecosystems. It demonstrated it difficult discern influence individual factors from reported field studies, extrapolate laboratory results conditions. The effects temperature increase chemical vary tested species test general, previous indicate heating, especially long-term, will mortality, less at risk vanishing habitats. same may be true for salinity caused road de-icing cold urban areas. Furthermore, high sensitivities were shown ammonium, which probably even more pronounced rising temperatures resulting altered biodiversity patterns. Toxicity heavy metals, variety invertebrates, increases time chronic exposure. Our current reveals diverse potential pollution, but our insights gained so far can only validated standardized long-term concepts.

Language: Английский

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Sustainable urban designs integrating aboveground microclimates and underground heat islands: A systematic review and design strategies

Renewable and Sustainable Energy Reviews, Journal Year: 2025, Volume and Issue: 212, P. 115445 - 115445

Published: Feb. 2, 2025

Language: Английский

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Is thermal use of groundwater a pollution?

Journal of Contaminant Hydrology, Journal Year: 2021, Volume and Issue: 239, P. 103791 - 103791

Published: Feb. 26, 2021

Language: Английский

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The silent impact of underground climate change on civil infrastructure

Communications Engineering, Journal Year: 2023, Volume and Issue: 2(1)

Published: July 11, 2023

Abstract Urban areas increasingly suffer from subsurface heat islands: an underground climate change responsible for environmental, public health, and transportation issues. Soils, rocks, construction materials deform under the influence of temperature variations excessive deformations can affect performance civil infrastructure. Here I explore if ground caused by islands might The Chicago Loop district is used as a case study. A 3-D computer model informed data collected via network sensors to characterize variations, deformations, displacements change. These are significant and, on case-by-case basis, may be incompatible with operational requirements structures. Therefore, impact infrastructure should considered in future urban planning strategies avoid possible structural damage malfunction. Overall, this work suggests that represent silent hazard other worldwide, but also opportunity reutilize or minimize waste ground.

Language: Английский

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Combining monitoring and modelling tools as a basis for city-scale concepts for a sustainable thermal management of urban groundwater resources

The Science of The Total Environment, Journal Year: 2018, Volume and Issue: 627, P. 1121 - 1136

Published: Feb. 6, 2018

Language: Английский

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Climate Change Yields Groundwater Warming in Bavaria, Germany

Frontiers in Earth Science, Journal Year: 2020, Volume and Issue: 8

Published: Nov. 13, 2020

Thermodynamic coupling between atmosphere and ground yields increasing aquifer temperatures as a consequence of global warming. While this is expected to manifest gradual warming in groundwater temperature time series, such continuous long-term recordings are scarce. As an alternative, the present work examines use repeated temperature-depth profiles 35 wells southern Germany, that were logged during campaigns early 1990s 2019. It revealed have increased nearly all cases. We find moderate good depth-dependent correlation trends air temperature, which however strongly influenced by local hydrogeological climate conditions. last three decades, rate 0.35 K (10a)-1 on average, increase subsurface decreasing with depth, median values 0.28 20 m only 0.09 60 depth. Still, slow damped bodies remarkable, especially considering naturally very minor changes pristine predictions atmospheric temperatures. This entails implications for temperature-dependent ecological hydro-chemical processes, also heat stored shallow ground. Moreover, it demonstrated annual gain below 15 due change range 10% state’s total demand, underlines geothermal potential associated natural fluxes at surface.

Language: Английский

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Assessing the Cooling Effect of Four Urban Parks of Different Sizes in a Temperate Continental Climate Zone: Wroclaw (Poland)

Forests, Journal Year: 2021, Volume and Issue: 12(8), P. 1136 - 1136

Published: Aug. 23, 2021

Urban parks have been known to form park cooling islands (PCI), which can effectively alleviate the effect of urban heat (UHI) in cities. This paper presents results obtained for four different size city Wroclaw, is located a temperate continental climate. The number publications areas this type climate and cities low compared sites hot humid areas. Land surface temperature (LST) maps were developed from Landsat 8 Thermal Infrared Sensor (TIRS) data acquired during three hottest weather periods between 2017 2019. Metrics spatial statistics characterising selected analysis based on their calculated. These included: perimeter, area, landscape shape index (LSI) PLC (forest area) metrics, Park Cooling Area (PCA), Efficiency (PCE), Gradient (PCG), Island (PCI) Extended (PCIe) indexes. averaged PCIe values ranged 2.0 3.6 °C, PCI 1.9 PCG 0.7 2.2 PCE 5.3 11.5, PCA 78.8 691.8 ha depending park. distance varied 110 m 925 size, forest area land use park’s vicinity. study provides new insight into effects medium sized climate, role regulation mitigate UHI effect.

Language: Английский

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Thermal influences on groundwater in urban environments – A multivariate statistical analysis of the subsurface heat island effect in Munich

The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 810, P. 152193 - 152193

Published: Dec. 7, 2021

Shallow aquifers beneath cities are highly influenced by anthropogenic heat sources, resulting in the formation of extensive subsurface urban islands. In addition to factors, natural factors also influence temperature. However, effect individual is difficult capture due high temporal dynamics environments. Particularly case shallow aquifers, seasonal temperature fluctuations often override existing sources or sinks. For city Munich, we identify dominant and influences on groundwater analyse how change with increasing depth subsurface. this purpose, use profiles from 752 selected monitoring wells. Since measurements were taken at different times, developed a statistical approach compensate for using passive tracing. Further, propose an indicator spatially assess thermal stress aquifer. A multiple regression analysis four nine identified surface sealing as strongest district heating grid weak but significant warming influence. The aquifer thickness, depth-to-water Darcy velocity show cooling addition, that local drivers, like uses, waters underground structures do not significantly contribute city-wide distribution. subsequent depth-dependent revealed thickness increases depth, whereas decreases, remain relatively constant. conclusion, study shows most critical factor mitigation future minimize further ground, restore permeability heavily sealed areas retain open landscapes.

Language: Английский

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