A CASE STUDY OF SHALLOW FLOW PATHS IN A STEEP ZERO-ORDER BASIN

1991 ◽  
Vol 27 (4) ◽  
pp. 679-685 ◽  
Author(s):  
J. J. McDonnell ◽  
Ian F Owens ◽  
M. K. Stewart
Keyword(s):  
Zero Order ◽  
Shallow Flow ◽  
Flow Paths

Structural-permeability favorability in crystalline rocks and implications for groundwater flow paths: a case study from the Aar Massif (central Switzerland)

2018 ◽  
Vol 26 (8) ◽  
pp. 2725-2738 ◽  
Author(s):  
Raphael Schneeberger ◽  
Daniel Egli ◽  
Georg W. Lanyon ◽  
Urs K. Mäder ◽  
Alfons Berger ◽  
...  
Keyword(s):  
Groundwater Flow ◽  
Crystalline Rocks ◽  
Flow Paths ◽  
Massif Central ◽  
Central Switzerland ◽  
Aar Massif

scholarly journals Groundwater surface mapping informs sources of catchment baseflow

2015 ◽  
Vol 19 (4) ◽  
pp. 1599-1613 ◽  
Author(s):  
J. F. Costelloe ◽  
T. J. Peterson ◽  
K. Halbert ◽  
A. W. Western ◽  
J. J. McDonnell
Keyword(s):  
Digital Filter ◽  
Groundwater Discharge ◽  
Independent Data ◽  
Groundwater Extraction ◽  
Shallow Flow ◽  
Surface Mapping ◽  
Flow Paths ◽  
Data Set ◽  
Groundwater Mapping ◽  
Regional Groundwater

Abstract. Groundwater discharge is a major contributor to stream baseflow. Quantifying this flux is difficult, despite its considerable importance to water resource management and evaluation of the effects of groundwater extraction on streamflow. It is important to be able to differentiate between contributions to streamflow from regional groundwater discharge (more susceptible to groundwater extraction) compared to interflow processes (arguably less susceptible to groundwater extraction). Here we explore the use of groundwater surface mapping as an independent data set to constrain estimates of groundwater discharge to streamflow using traditional digital filter and tracer techniques. We developed groundwater surfaces from 88 monitoring bores using Kriging with external drift and for a subset of 33 bores with shallow screen depths. Baseflow estimates at the catchment outlet were made using the Eckhardt digital filter approach and tracer data mixing analysis using major ion signatures. Our groundwater mapping approach yielded two measures (percentage area intersecting the land surface and monthly change in saturated volume) that indicated that digital filter-derived baseflow significantly exceeded probable groundwater discharge during most months. Tracer analysis was not able to resolve contributions from ungauged tributary flows (sourced from either shallow flow paths, i.e. interflow and perched aquifer discharge, or regional groundwater discharge) and regional groundwater. Groundwater mapping was able to identify ungauged sub-catchments where regional groundwater discharge was too deep to contribute to tributary flow and thus where shallow flow paths dominated the tributary flow. Our results suggest that kriged groundwater surfaces provide a useful, empirical and independent data set for investigating sources of fluxes contributing to baseflow and identifying periods where baseflow analysis may overestimate groundwater discharge to streamflow.

scholarly journals Relationship between rainfall and water table in a coastal aquifer: the case study of Castelporziano presidential estate

2019 ◽  
Author(s):  
Francesca Banzato ◽  
Marino Domenico Barberio ◽  
Andrea Del Bon ◽  
Alessandro Lacchini ◽  
Valentina Marinelli ◽  
...  
Keyword(s):  
Coastal Area ◽  
Coastal Aquifer ◽  
Monitoring Network ◽  
Seasonal Effect ◽  
Volcanic Aquifer ◽  
Steady Regime ◽  
Flow Paths ◽  
Groundwater Levels ◽  
Northern Sector

This study is focused on the analysis of seasonal and annual variability in groundwater levels of the coastal aquifer of Castelporziano Presidential Estate, a protected area of 59 Km2 located in the periphery of Rome. A comparison with the local trends of rainfall at “Castello” gauging station at different time scales (monthly, seasonal and annual) has been carried out. The results highlight differences between the coastal area and eastern and northern sector of the Estate. Indeed, the seasonal effect due to local meteoric recharge is direct and regular during the year in the coastal area in respect to the eastern and northern sectors of the Estate. Moreover, annual steady regime and multi-year trend of groundwater levels suggest the contribution from the adjacent volcanic aquifer of Albani Hills. In the latter case, the regional circulation of groundwater is affected by the effects of intense withdrawals. The maintenance of the monitoring network will allow to define the flow paths of the groundwater that characterize the coastal aquifer of Castelporziano.

scholarly journals Groundwater surface mapping informs sources of catchment baseflow

2014 ◽  
Vol 11 (11) ◽  
pp. 12405-12441 ◽  
Author(s):  
J. F. Costelloe ◽  
T. J. Peterson ◽  
K. Halbert ◽  
A. W. Western ◽  
J. J. McDonnell
Keyword(s):  
Digital Filter ◽  
Water Resource Management ◽  
Groundwater Discharge ◽  
Groundwater Extraction ◽  
Shallow Flow ◽  
Surface Mapping ◽  
Flow Paths ◽  
Independent Dataset ◽  
Groundwater Mapping ◽  
Regional Groundwater

Abstract. Groundwater discharge is a major contributor to stream baseflow. Quantifying this flux is difficult, despite its considerable importance to water resource management and evaluation of the effects of groundwater extraction on streamflow. It is important to be able to differentiate between contributions to streamflow from regional groundwater discharge (more susceptible to groundwater extraction) compared to interflow processes (arguably less susceptible to groundwater extraction). Here we explore the use of unconfined groundwater surface mapping as an independent dataset to constrain estimates of groundwater discharge to streamflow using traditional digital filter and tracer techniques. We developed groundwater surfaces from 98 monitoring bores using Kriging with external drift. Baseflow estimates at the catchment outlet were made using the Eckhardt digital filter approach and tracer data mixing analysis using major ion and stable isotope signatures. Our groundwater mapping approach yielded two measures (percentage area intersecting the land surface and monthly change in saturated volume) that indicated that digital filter-derived baseflow significantly exceeded probable groundwater discharge during the high flow period of spring to early summer. Tracer analysis was not able to resolve contributions from ungauged tributary flows (sourced from either shallow flow paths, i.e. interflow and perched aquifer discharge, or regional groundwater discharge) and regional groundwater. Groundwater mapping was able to identify ungauged sub-catchments where regional groundwater discharge was too deep to contribute to tributary flow and thus where shallow flow paths dominated the tributary flow. Our results suggest that kriged unconfined groundwater surfaces provide a useful, empirical and independent dataset for investigating sources of fluxes contributing to baseflow and identifying periods where baseflow analysis may overestimate groundwater discharge to streamflow.

scholarly journals Role of Zero-Order Loop in Protein Unfolding Case Study with Apoazurin

2020 ◽  
Vol 118 (3) ◽  
pp. 197a
Author(s):  
Dirar M. Homouz ◽  
Fabio Zegarra ◽  
Pernilla E. Wittung-Stafshede ◽  
Margaret S. Cheung
Keyword(s):  
Protein Unfolding ◽  
Zero Order
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