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hydrological cycle --- hydrogeochemistry --- water management --- groundwater flow --- natural and artificial water treatment --- impact of climate extremes

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In recent decades, the study of groundwater flow and solute transport has advanced into new territories that are beyond conventional theories, such as Darcy’s law and Fick’s law. The studied media have changed from permeable porous and fractured ones to much less permeable ones, such as clay and shale. The studied pore sizes have also changed from millimetres to micro-meters or even nano-meters. The objective of this Special Issue is to report recent advances in groundwater flow and solute transport that push the knowledge boundary into new territories which include, but are not limited to, flow and transport in sloping aquifer/hillslopes, coupled unsaturated and saturated flow, coupled aquifer-vertical/horizontal/slant well flow, interaction of aquifer with connected and disconnected rivers, non-Darcian flow, anomalous transport beyond the Fickian scheme, and flow and transport in extremely small pore spaces such as shale and tight sandstones. Contributions focusing on innovative experimental, numerical, and analytical methods for understanding unconventional problems, such as the above-listed ones, are encouraged, and contributions addressing flow and transport at interfaces of different media and crossing multiple temporal and spatial scales are of great value

Levy stable distribution --- n/a --- permeameter test --- rough single fracture --- seawater intrusion --- the Beishan area --- groundwater flow model --- slenderness effect --- SW–GW interaction --- semi-analytical solution --- assessment --- hydraulic conductivity --- irrigation --- first-order analytical approach --- Ulan Buh Desert --- IUM --- solute longitudinal dispersion --- soil formation --- DSR --- bimsoils --- nuclear waste disposal --- IUV --- infiltration --- TOUGH2 --- sustainable development --- groundwater ERT --- non-Darcian --- non-Fickian --- GFModel --- erosion --- permeability coefficient --- hydrologic exchange --- evaporation calculation --- evolving-scale log-conductivity --- radioactive contaminant --- field measurements --- fractured aquifers --- desert farmland --- analytical solution --- silty clay --- uncertainty --- steady-state vertical flux --- flow modeling --- non-Darcy flow --- percolation --- Monte Carlo --- solute transport --- groundwater flow --- salinity map --- numerical simulation --- stochastic Lagrangian framework --- unsaturated flow --- fractional derivative --- water resource utilization efficiency --- heterogeneity --- perturbation method --- Columbia River --- water flow --- SW-GW interaction

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Geology. Earth sciences --- Geology --- Fluids --- Géologie --- Fluides --- Periodicals --- Périodiques --- Fluid dynamics --- Hydrogeology --- Groundwater --- Fluides, Dynamique des --- Hydrogéologie --- Eau souterraine --- Migration --- Earth (Planet) --- Terre --- Crust --- Croûte --- Earth Sciences --- Physics --- General and Others --- Crust of the Earth. --- Fluid dynamics. --- Groundwater. --- Hydrogeology. --- Earth sciences. --- Geology. --- Migration. --- Earth sciences --- groundwater --- geothermal fluids --- petroleum --- geochemistry --- Hydrology. --- Fluid Mechanics. --- Geohydrology --- Hydrology --- Ground water --- Subterranean water --- Underground water --- Water, Underground --- Water --- Migration of fluids --- Petroleum --- Groundwater flow --- Dynamics --- Fluid mechanics --- Hydraulics --- Mechanics --- Hydrostatics --- Permeability --- Earth --- Dynamique des fluides. --- Eau souterraine. --- Hydrogéologie. --- Croûte terrestre. --- Fluid migration --- Planets --- Crust. --- Crust of the Earth --- Crusts of the planets --- Planetary crusts --- Dynamique des fluides

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Urbanization worldwide is a pervasive phenomenon of our time, and sustainable urban development is one of the greatest challenges faced by the contemporary world. The subsurface plays a range of roles in such developments through the complex processes of urbanization, including building development, constructing roads, and providing water supplies, drainage, sanitation, and even solid waste disposal.Urban groundwater problems are usually predictable; however, they are not predicted early enough. During recent decades, progressive advances in the scientific understanding of urban hydrogeological processes and the groundwater regimes of a substantial number of cities have been documented. This extensive array of subsurface challenges that cities have to contend with lies at the core of the sustainability of the urban water cycle. This is threatened by the increasing scale and downward extent of urban subsurface construction, including utilities (cables, sewage, and drainage), transportation (tunnels, passages), and storage (cellars, parking lots, and thermal energy). The cumulative impact of this subsurface congestion on the surrounding geology, and especially on the groundwater system, has to be constantly studied and addressed.In this volume, key connections amongst urban hydrogeology activities are identified as being consistent with scientific results and good practices in their relationship to subsurface data and knowledge on subsurface systems. The volume supports a useful dialogue between the providers and consumers of urban groundwater data and knowledge, offering new perspectives on the existing research themes.

hydrochemistry --- chalk aquifer --- 1,1,1-trichloroethane --- degradation --- sulphate --- backfill --- leaching test --- urban development --- developing cities --- groundwater policy --- integrated management --- groundwater --- urban hydrology --- drainage --- modeling --- sewer --- baseflow --- urban hydrogeology --- groundwater quality --- sewer system --- agriculture --- groundwater modeling --- urban --- resilience --- sustainability --- hazards --- subsurface --- water cycle --- land-use --- infrastructure --- planning --- catchment --- hydrogeology --- accidental wetland --- road salt --- headwater stream --- groundwater flow --- urban groundwater --- numerical modeling --- water budget --- regional land subsidence --- groundwater abstraction --- numerical simulation --- InSAR --- Semarang City --- cutoff walls --- plastic concrete --- cement-bentonite-water ratio --- infiltration of stormwater --- green infrastructure --- nature-based solutions --- bioretention --- hydrologic performance --- full-scale testing --- drought --- urban planning --- sustainable development --- n/a

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This book on the sustainable use of soils and water addressed a variety of issues related to the utopian desire for environmental sustainability and the deviations from this scene observed in the real world. Competing interests for land are frequently a factor in land degradation, especially where the adopted land uses do not conform with the land capability (the natural use of soil). The concerns of researchers about these matters are presented in the articles comprising this Special Issue book. Various approaches were used to assess the (im)balance between economic profit and environmental conservation in various regions, in addition to potential routes to bring landscapes back to a sustainable status being disclosed.

environmental and economic changes --- overexploitation --- stream flow downscaling --- Recharge --- Institutions --- evaluation --- geo hazards --- marginal land resources --- water resources --- contributions --- land use change --- comprehensive land carrying capacity --- land eco-security --- scale effects --- river basin --- Ghana --- urbanization --- groundwater recharge --- MicroLEIS DSS --- multiple stresses --- forest --- land use conflicts --- soil --- analytic hierarchy process --- heavy metal pollution assessment --- recharge --- environmental degradation --- spatial variation --- debris flow waste-shoal land --- Lankao county --- encounters of interests --- territorial development --- driving forces analysis --- land use policy --- climate conditions --- time series analysis --- arable soil --- urban area --- multi-criterion comprehensive evaluation --- Land Use --- agricultural and livestock products --- evapotranspiration --- hydrological processes --- Trnava district --- macromodel DNS/SWAT --- central Asia --- CA-Markov --- integrative landscape management --- Land use change --- land use and transformation --- weight --- Contemporary Yellow River Delta --- conjunctive water resources management --- set pair theory --- sustainability --- karst aquifer --- withdrawal of agricultural land --- sustainable development --- SWAT --- water resource management --- water footprint --- land-use planning --- Ecosystem service value --- Penman–Monteith equation --- cloud model --- groundwater flow field --- standard deviation --- temporal stability --- landscape as geosystem --- Gross Domestic Product --- geology --- territorial factors --- agriculture --- multi-dimension --- Groundwater --- conflicts --- Green GDP --- temporal-spatial variations --- relief --- recharge zones --- groundwater depth --- Nitrate Vulnerable Zones --- hydrologic modeling --- Managed Aquifer --- soil reclamation --- nitrogen --- discrete wavelet transform --- legislative factors --- developmental factors --- ungauged catchment --- rural households’ behaviors --- arid region --- land use/cover change --- spatialization --- sustainable agriculture