scholarly journals Discharge and groundwater flow processes based on the hydrological observation in a high mountain headwater/first order watershed

2020 ◽  
Vol 50 (2) ◽  
pp. 99-103
Author(s):  
Koichi SAKAKIBARA ◽  
Keisuke SUZUKI
Keyword(s):  
Groundwater Flow ◽  
High Mountain ◽  
First Order ◽  
Flow Processes

scholarly journals Combined method of 3H/3He apparent age and on-site helium analysis to identify groundwater flow processes and transport of perchloroethylene (PCE) in an urban area

2021 ◽  
Vol 238 ◽  
pp. 103773
Author(s):  
Christian Moeck ◽  
Andrea L. Popp ◽  
Matthias S. Brennwald ◽  
Rolf Kipfer ◽  
Mario Schirmer
Keyword(s):  
Groundwater Flow ◽  
Urban Area ◽  
Combined Method ◽  
Flow Processes ◽  
Apparent Age

Ground-based thermal imaging of groundwater flow processes at the seepage face

2009 ◽  
Vol 36 (14) ◽  
Author(s):  
Richard S. Deitchman ◽  
Steven P. Loheide
Keyword(s):  
Groundwater Flow ◽  
Thermal Imaging ◽  
Flow Processes ◽  
Seepage Face

scholarly journals Groundwater Flow Processes and Human Impact along the Arid US-Mexican Border, Evidenced by Environmental Tracers: The Case of Tecate, Baja California

2018 ◽  
Vol 15 (5) ◽  
pp. 887 ◽  
Author(s):  
Jürgen Mahlknecht ◽  
Luis Daessle ◽  
Maria Esteller ◽  
Juan Torres-Martinez ◽  
Abrahan Mora
Keyword(s):  
Groundwater Flow ◽  
Human Impact ◽  
Baja California ◽  
Environmental Tracers ◽  
Flow Processes

scholarly journals Groundwater flow processes and mixing in active volcanic systems: the case of Guadalajara (Mexico)

2015 ◽  
Vol 12 (2) ◽  
pp. 1599-1631
Author(s):  
A. Hernández-Antonio ◽  
J. Mahlknecht ◽  
C. Tamez-Meléndez ◽  
J. Ramos-Leal ◽  
A. Ramírez-Orozco ◽  
...  
Keyword(s):  
Groundwater Flow ◽  
Agricultural Practices ◽  
Principal Component ◽  
Distribution Patterns ◽  
Groundwater Chemistry ◽  
Polluted Water ◽  
Regional Flow ◽  
Flow Processes ◽  
Production Wells ◽  
Hydrothermal Water

Abstract. Groundwater chemistry and isotopic data from 40 production wells in the Atemajac and Toluquilla Valleys, located in and around the Guadalajara metropolitan area, were determined to develop a conceptual model of groundwater flow processes and mixing. Multivariate analysis including cluster analysis and principal component analysis were used to elucidate distribution patterns of constituents and factors controlling groundwater chemistry. Based on this analysis, groundwater was classified into four groups: cold groundwater, hydrothermal water, polluted groundwater and mixed groundwater. Cold groundwater is characterized by low temperature, salinity, and Cl and Na concentrations and is predominantly of Na-HCO3 type. It originates as recharge at Primavera caldera and is found predominantly in wells in the upper Atemajac Valley. Hydrothermal water is characterized by high salinity, temperature, Cl, Na, HCO3, and the presence of minor elements such as Li, Mn and F. It is a mixed HCO3 type found in wells from Toluquilla Valley and represents regional flow circulation through basaltic and andesitic rocks. Polluted groundwater is characterized by elevated nitrate and sulfate concentrations and is usually derived from urban water cycling and subordinately from agricultural practices. Mixed groundwaters between cold and hydrothermal components are predominantly found in the lower Atemajac Valley. Tritium method elucidated that practically all of the sampled groundwater contains at least a small fraction of modern water. The multivariate mixing model M3 indicates that the proportion of hydrothermal fluids in sampled well water is between 13 (local groundwater) and 87% (hydrothermal water), and the proportion of polluted water in wells ranges from 0 to 63%. This study may help local water authorities to identify and quantify groundwater contamination and act accordingly.

Modeling of groundwater flow velocity and aquifer recharge in a Cenozoic multi-aquifer system – a case study from Eastern Brandenburg (Germany)

2020 ◽  
Author(s):  
Silvio Janetz ◽  
Christoph Jahnke ◽  
Frank Wendland ◽  
Hans-Jürgen Voigt
Keyword(s):  
Groundwater Flow ◽  
Groundwater Resources ◽  
Turnover Time ◽  
Aquifer Recharge ◽  
Deep Groundwater ◽  
Near Surface ◽  
Aquifer System ◽  
Deep Aquifers ◽  
Regional Flow ◽  
Flow Processes

<p>In recent years, deep aquifers (> 50 m below ground level) have become increasingly interesting for the supply of drinking and irrigation water or geothermal use. Understanding the regional flow processes between near-surface and deep aquifer systems is an important criterion for the sustainable management of deep groundwater resources. However, hydrogeological conditions, regional flow rates and aquifer recharge in deep aquifers are largely unknown in many cases. The aims of the present study are therefore to determine (i) groundwater flow velocities in a Cenozoic multi-aquifer system, and (ii) proportion of aquifer recharge into the individual Cenozoic aquifers and timescales to completely replace water in the Cenozoic aquifers (turnover time).  </p><p>The numerical study was carried out in three adjacent groundwater catchment areas in the region of Eastern Brandenburg. In a first step, a hydrogeological 3D model of the entire Cenozoic aquifer system (85 km × 73 km and down to a depth of 0.5 km) was developed, which comprises up to 12 unconsolidated sandy aquifers and 10 confining units (glacial tills, silts and clays). In a second step, a steady-state flow modelling was performed including calibration using natural hydraulic head data from both regional main and deep aquifers.</p><p>The modeling results show that the average groundwater flow velocities decrease from 20-50 m/a in the near-surface Pleistocene main aquifers to 1-2 m/a in the deep Oligocene aquifers. At the same time, the aquifer recharge in the aquifer system decreases substantially with increasing depth. Depending on the catchment geology, the Pleistocene main aquifers are recharged by 65-70 % of infiltration water, while the aquifer recharge of the deep Oligocene aquifers is only 4.5-9.5 %. The calculations of turnover time indicate that the time periods to completely flush the deep aquifers are very long (approx. between 90 and 4600 years). The results thus allow a first quantification of the flow processes between near-surface and deep aquifers as well as the identification of flow paths to develop a utilization concept for deep groundwater resources in the region of Eastern Brandenburg.</p>

First order analysis of uncertainty in numerical models of groundwater flow part: 1. Mathematical development

1981 ◽  
Vol 17 (1) ◽  
pp. 149-161 ◽  
Author(s):  
Michael D. Dettinger ◽  
John L. Wilson
Keyword(s):  
Groundwater Flow ◽  
Numerical Models ◽  
Mathematical Development ◽  
Order Analysis ◽  
First Order ◽  
Flow Part

scholarly journals Hydrological connectivity from glaciers to rivers in the Qinghai-Tibet Plateau: roles of suprapermafrost and subpermafrost groundwater

2017 ◽  
Author(s):  
Rui Ma ◽  
Ziyong Sun ◽  
Yalu Hu ◽  
Qixing Chang ◽  
Shuo Wang ◽  
...  
Keyword(s):  
Groundwater Flow ◽  
Stream Flow ◽  
Cold Season ◽  
Tibet Plateau ◽  
High Mountain ◽  
High Mountains ◽  
Piedmont Plain ◽  
Quaternary Aquifer ◽  
Water Conduction ◽  
Qinghai Tibet Plateau

Abstract. The roles of subsurface groundwater flow in the hydrological cycle within the alpine area characterized by permafrost and/or seasonal frost are poorly known. We studied the role of permafrost in controlling groundwater flow and the hydrological connections between glaciers in high mountain and river in the low plain with hydraulic head, temperature, geochemical, and isotopic data. The study area was a catchment in the headwater region of the Heihe River in the northeastern Qinghai-Tibet Plateau. The groundwater in the high mountains mainly occurs as suprapermafrost groundwater, and in the moraine and fluvio-glacial deposits on the planation surfaces of higher hills suprapermafrost, intrapermafrost, and subpermafrost groundwater co-occur. Glacier and snow-meltwater are transported from the high mountains to the plain through stream channels, slope surfaces, and supra- and subpermafrost aquifers. Groundwater in the Quaternary aquifer under the piedmont plain is recharged by the lateral inflow from permafrost groundwaters and the infiltration of streams, and is discharged as baseflow to the stream in the north. Groundwater maintained stream flow over the cold season and significantly contributed to the stream flow during the rainy season. 3H and 14C data indicated that the age of supra- and sub-permafrost groundwater, and groundwater in Quaternary aquifer of seasonal frost zone, ranges from 30–60 years. Two proposed mechanisms contribute to seasonal variation of the aquifer water-conduction capacity: (1) surface drainage through the stream channel during the high-flow period, and (2) subsurface drainage to an artesian aquifer confined by stream icing and seasonal frost during the cold season.

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