Using δ 18 O and δ 2 H to Detect Hydraulic Connection Between a Sinkhole Lake and a First‐Magnitude Spring

Ground Water ◽  
2021 ◽  
Author(s):  
Nur Ahmed ◽  
Ming Ye ◽  
Yang Wang ◽  
Tom Greenhalgh ◽  
Karlee Fowler
Keyword(s):  
Hydraulic Connection ◽  
Sinkhole Lake

Quantitative investigations of the hydraulic connection between a large reservoir and a buried valley aquifer in southern Alberta

2005 ◽  
Vol 42 (5) ◽  
pp. 1461-1473 ◽  
Author(s):  
B D Smerdon ◽  
C A Mendoza ◽  
A M McCann
Keyword(s):  
Groundwater Flow ◽  
Flow Model ◽  
Hydraulic Head ◽  
Water Levels ◽  
Groundwater Flow Model ◽  
Reservoir Level ◽  
Hydraulic Connection ◽  
Southern Alberta ◽  
Approximate Location ◽  
Pumping Rates

Quantitative investigations, including two aquifer tests and development of a three-dimensional (3D) groundwater flow model, were required to determine the hydraulic connection between an irrigation reservoir and a buried valley aquifer in southern Alberta. Evidence of seepage was detected in the buried valley aquifer 10 km east of the Pine Coulee reservoir at the onset of filling in 1999, when the reservoir level exceeded an elevation of 1035 m above sea level (a.s.l.). Concern for an increase in the local water table and the creation of artesian conditions in the aquifer prompted this study to determine the approximate location of a seepage window that appeared to be connecting the reservoir and aquifer. Observations of hydraulic head in the aquifer during the pumping tests revealed a barrier boundary when the reservoir level was at an elevation of 1035 m a.s.l. and a recharge boundary condition when the elevation exceeded 1039 m a.s.l. These data were used to calibrate a 3D groundwater flow model, which was needed to determine the hydraulic properties and approximate location of the leakage zone. The quantitative investigation showed that seepage likely occurred through the sideslopes of the flooded coulee, rather than through the low-permeability coulee floor sediments or the embankment dam. Further simulations illustrated the expected seepage rates at various reservoir supply levels and the pumping rates required for relief wells installed in the buried valley aquifer to maintain historic aquifer hydraulic head. A brief postanalysis indicated that the forecasted pumping rates were only 15% lower than have been required to maintain preconstruction water levels in the buried valley aquifer.Key words: dams, seepage analysis, groundwater modelling, buried valley aquifer, pumping test.

Plant wax evidence for precipitation and vegetation change from a coastal sinkhole lake in the Bahamas spanning the last 3000 years

2020 ◽  
Vol 150 ◽  
pp. 104120
Author(s):  
Anne E. Tamalavage ◽  
Peter J. van Hengstum ◽  
Patrick Louchouarn ◽  
Patricia L. Fall ◽  
Jeffrey P. Donnelly ◽  
...  
Keyword(s):  
Vegetation Change ◽  
The Bahamas ◽  
Plant Wax ◽  
Sinkhole Lake

scholarly journals Hydrodynamics in Evaporate-Bearing Fine-Grained Successions Investigated through an Interdisciplinary Approach: A Test Study in Southern Italy—Hydrogeological Behaviour of Heterogeneous Low-Permeability Media

Geofluids ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-15 ◽  
Author(s):  
E. Petrella ◽  
A. Bucci ◽  
K. Ogata ◽  
A. Zanini ◽  
G. Naclerio ◽  
...  
Keyword(s):  
Southern Italy ◽  
Interdisciplinary Approach ◽  
Flow Conditions ◽  
Hydraulic Connection ◽  
Fine Grained ◽  
Test Study ◽  
Aquifer Systems ◽  
Hydraulic Heterogeneity ◽  
Microbiological Data

Messinian evaporates are widely distributed in the Mediterranean Sea as outcropping sediments in small marginal basins and in marine cores. Progressive filling of subbasins led to the formation of complex aquifer systems in different regions where hypersaline and fresh water coexist and interact in different manner. It also generates a significant diversification of groundwater hydrochemical signature and different microbial communities. In the case study, the hydrogeology and hydrochemistry of the whole system are influenced by good hydraulic connection between the shallower pyroclastic horizon and the underlying evaporate-bearing fine-grained Messinian succession. This is demonstrated by the merge of hydrogeological, chemical, isotopic, and microbiological data. No mixing with deep ascending waters has been observed. As shown by geophysical, hydraulic, and microbiological investigations, the hydraulic heterogeneity of the Messinian bedrock, mainly due to karstified evaporitic interstrata/lenses, causes the hydraulic head to significantly vary with depth. Somewhere, the head increases with the depth’s increase and artesian flow conditions are locally observed. Moreover, the metagenomic investigations demonstrated the existence of a poor hydraulic connection within the evaporate-bearing fine-grained succession at metric and decametric scales, therefore leading to a patchwork of geochemical (and microbiological) subenvironments.

Groundwater governance and the Law of the Hidden Sea

Water Policy ◽  
2009 ◽  
Vol 11 (6) ◽  
pp. 742-762 ◽  
Author(s):  
Elena Lopez-Gunn ◽  
W. Todd Jarvis
Keyword(s):  
Groundwater Resources ◽  
Interdisciplinary Approach ◽  
Hydraulic Connection ◽  
Groundwater Governance ◽  
Resource Governance ◽  
Natural Resource Governance ◽  
Surface Water Resources ◽  
Deep Aquifers ◽  
Governance Model ◽  
Traditional Approaches

The paper offers an alternative interdisciplinary approach to dealing with the complexity associated with groundwater resources, providing a new angle that integrates deep groundwater systems as defined by hydro-geologists with a paradigm shift in natural resource governance, developed by political scientists. It questions the piecemeal approach to governance of groundwater resources, coupled with the lack of acknowledgment regarding the hydraulic connection of vast deep aquifers—or a hidden sea of groundwater. Rather than relying on traditional approaches to groundwater governance, which treat the resource like a mineral resource underlying the boundaries of a sovereign nation, the “post-sovereignty” and “multi-level” governance model proposed here for groundwater resources acknowledges that groundwater is hydraulically connected to the ocean and is equally complex with respect to predictive modeling. Existing legal instruments associated with the ocean that fall under the global “contract” of the UNCLOS, together with ongoing efforts to develop a legal instrument for transboundary aquifers, offer useful lessons. The paper concludes that a “world water contract” or Law of the Hidden Sea could be adapted to incorporate groundwater as a global common, deep aquifers that are not in direct hydraulic connection with surface water resources and that are part of the developing common heritage of mankind.

Linking biogeochemical processes and historic primary producer communities in a SE USA sinkhole lake from the mid-Holocene to present

2017 ◽  
Vol 57 (4) ◽  
pp. 295-306 ◽  
Author(s):  
Sean Michael Earley ◽  
Matthew Neal Waters ◽  
Donald Thieme ◽  
Joseph McDonald Smoak
Keyword(s):  
Biogeochemical Processes ◽  
Primary Producer ◽  
Sinkhole Lake

A Study on the Groundwater Tracer Test in the Dragonmount Tailing Pond, Guangxi Province

2011 ◽  
Vol 243-249 ◽  
pp. 3325-3330
Author(s):  
Yuan Li ◽  
Jian Feng Qi ◽  
Lei Jia ◽  
Ying Zhang
Keyword(s):  
Dispersion Model ◽  
Water Source ◽  
Tracer Test ◽  
Concentration Curve ◽  
Hydrodynamic Dispersion ◽  
Hydrogeological Condition ◽  
Tailing Pond ◽  
Guangxi Province ◽  
Hydraulic Connection ◽  
Leakage Path

The dragonmount tailing pond which is taken as the study area has complex hydrogeological condition. It lies in Jingxi county, Guangxi province. In this paper, it gives out the time-concentration curve for the groundwater tracer test, makes use of single-dimensional hydrodynamic dispersion model to figures out the velocity of groundwater, coefficient of dispersion and dispersity. The mechanism of multimodal and double-humped phenomena was also investigated in the tracer test. In this paper, some situations such as leakage path, the trend of groundwater, hydraulic connection were analyzed. The research provides necessary hydrogeological basis for the design of the tailing pond and it’s of great significance to evaluate the pollution of its water source and conduct the construction.

Use of a hydrogeochemical approach in determining hydraulic connection between porous heat reservoirs in Kaifeng area, Henan, China

2007 ◽  
Vol 22 (2) ◽  
pp. 276-288 ◽  
Author(s):  
Xueyu Lin ◽  
Aboubacar Tabouré ◽  
Xinyi Wang ◽  
Zisheng Liao
Keyword(s):  
Hydraulic Connection

scholarly journals Dyes and Isotopes Track Groundwater from Sink to Spring

Eos ◽  
2021 ◽  
Vol 102 ◽  
Author(s):  
J. Besl
Keyword(s):  
Karst Aquifers ◽  
Hydraulic Connection ◽  
Natural Spring

The hydraulic connection between a sinkhole and a natural spring—the longest and largest yet documented—could help reduce the guesswork in mapping karst aquifers.

scholarly journals Interpretation of the results of monitoring of the piezometric measurements of the Chańcza dam in 2014–2017

2019 ◽  
Vol 42 (1) ◽  
pp. 117-123
Author(s):  
Stanisław K. Lach
Keyword(s):  
Least Squares ◽  
Water Level ◽  
Linear Function ◽  
Least Squares Method ◽  
Atmospheric Precipitation ◽  
Statistical Test ◽  
Water Levels ◽  
Hydraulic Connection ◽  
Control Devices ◽  
The Town

Abstract The occurrence of a hydraulic connection between piezometers is identified based on similar changes in water levels. Some piezometers react to changing upper or lower water levels, some may also react to atmospheric precipitation. If the reaction to variable upper water levels is significant, then leakage of seepage control devices is identified and the dam is subjected to repair works. The aim of this research paper is to present and analyse the dynamics of variability of water levels in open piezometers of the Chańcza dam, located at the 36 km of the Czarna Staszowska River in the town of Korytnica in Świętokrzyskie province (Poland). Before the analysis of the piezometric data was commenced, the Grubbs statistical test was used to identify and reject the outliers. The scope of the research includes the data captured between January 14, 2014 and January 13, 2017. A hypothesis was formulated that the change in the trend occurred after the spring of 2015 when the water level in the reservoir was reduced by approx. 1.5 m. Two trend lines were adapted for the water levels of each piezometer using the least squares method – the first one for the period from January 2014 to May 2015, and the second one from June 2015 to January 2017. In this way, two slopes of the linear function were obtained together with an estimation of their errors. These slopes were compared using a statistical parallelism test.

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