scholarly journals An automated dye-dilution based seepage meter for the time-series measurement of submarine groundwater discharge

2003 ◽  
Vol 1 (1) ◽  
pp. 16-28 ◽  
Author(s):  
Edward Sholkovitz ◽  
Craig Herbold ◽  
Matthew Charette
Keyword(s):  
Time Series ◽  
Submarine Groundwater Discharge ◽  
Groundwater Discharge ◽  
Dye Dilution ◽  
Seepage Meter ◽  
Submarine Groundwater ◽  
Series Measurement ◽  
Time Series Measurement

scholarly journals Submarine Groundwater Discharge From Sediments and Sand Boils Quantified by the Mean Residence Time of a Tracer Injection

2021 ◽  
Vol 9 ◽  
Author(s):  
Michael Schlüter ◽  
Philipp Maier
Keyword(s):  
Residence Time ◽  
Mean Residence Time ◽  
Submarine Groundwater Discharge ◽  
Groundwater Discharge ◽  
Tracer Injection ◽  
Discharge Rates ◽  
Seepage Meter ◽  
Submarine Groundwater ◽  
Sand Boils ◽  
The Mean

To quantify submarine groundwater discharge, we developed an inexpensive automated seepage meter that applies a tracer injection and the computation of the mean residence time. The SGD-MRT is designed to measure a wide range of discharge rates from about 30 to 800 cm³/min and allows minimizing backpressures caused by pipe friction or flow sensors. By modifying the inner volume of the flow-through unit, the range of measurement is adjustable to lower or higher discharge rates. For process control and data acquisition, an Arduino controller board is used. In addition, components like temperature, conductivity, and pressure sensors or pumps extend the scope of the seepage meter. During field tests in the Wadden Sea, covering tidal cycles, discharge rates of more than 700 cm³/min were released from sand boils. Based on the measured discharge rates and numerical integration of the time series data, a water volume of about 400 dm3 with a seawater content of less than 12% was released from the sand boil within 7 h.

Extended time series measurements of submarine groundwater discharge tracers (222Rn and CH4) at a coastal site in Florida

2009 ◽  
Vol 113 (1-2) ◽  
pp. 137-147 ◽  
Author(s):  
Isaac R. Santos ◽  
Natasha Dimova ◽  
Richard N. Peterson ◽  
Benjamin Mwashote ◽  
Jeffrey Chanton ◽  
...  
Keyword(s):  
Time Series ◽  
Submarine Groundwater Discharge ◽  
Groundwater Discharge ◽  
Extended Time ◽  
Coastal Site ◽  
Submarine Groundwater

scholarly journals SUBMARINE GROUNDWATER DISCHARGE MEASUREMENT ON THE SANDY UNCONFINED AQUIFER AT THE CARNAVAL BEACH, ANCOL (JAKARTA BAY)

2017 ◽  
Vol 41 (2) ◽  
pp. 59-65
Author(s):  
Hendra Bakti ◽  
Rachmat Fajar Lubis ◽  
Robert M. Delinom ◽  
Makoto Taniguchi
Keyword(s):  
Fresh Water ◽  
Coastal Waters ◽  
Submarine Groundwater Discharge ◽  
Groundwater Discharge ◽  
Unconfined Aquifer ◽  
Groundwater System ◽  
Seepage Meter ◽  
Submarine Groundwater ◽  
Direct Discharge ◽  
Temperature Depth

Submarine groundwater discharge (SGD) is defined as all direct discharge of subsurface fluids into coastal zone. Components of SGD consist of fresh submarine groundwater discharge and the recirculated saline seawater discharge. SGD could act as a pathway for the transport of anthropogenic contaminants and nutrients to coastal waters. Measurement SGD at Carnaval Beach, Ancol, Jakarta was focussed on unconfined groundwater system. The method of quantified used automatic seepage meter for measured of SGD and installed conductivity temperature depth. The average SGD rate was 0.21 mm/min on March 20-31, 2009 consist of 19.05% fresh water, 80.95% recirculated seawater. April 1-23, 2009, the average SGD rate was 0.81 ml/min which consisted of 16.04% fresh water, 83.96% recirculated seawater. SGD fluctuation was opposite with the tide. As a result, submarine groundwater discharge at Jakarta coastal area was defined and can be measured to quantify.

scholarly journals Multi-scale evaluations of submarine groundwater discharge

2015 ◽  
Vol 365 ◽  
pp. 66-71 ◽  
Author(s):  
M. Taniguchi ◽  
M. Ono ◽  
M. Takahashi
Keyword(s):  
Submarine Groundwater Discharge ◽  
Groundwater Discharge ◽  
Daily Basis ◽  
Sea Level Changes ◽  
Point Scale ◽  
Multi Scale ◽  
Seepage Meters ◽  
Seepage Meter ◽  
Submarine Groundwater ◽  
Made In

Abstract. Multi-scale evaluations of submarine groundwater discharge (SGD) have been made in Saijo, Ehime Prefecture, Shikoku Island, Japan, by using seepage meters for point scale, 222Rn tracer for point and coastal scales, and a numerical groundwater model (SEAWAT) for coastal and basin scales. Daily basis temporal changes in SGD are evaluated by continuous seepage meter and 222Rn mooring measurements, and depend on sea level changes. Spatial evaluations of SGD were also made by 222Rn along the coast in July 2010 and November 2011. The area with larger 222Rn concentration during both seasons agreed well with the area with larger SGD calculated by 3D groundwater numerical simulations.

scholarly journals Fresh and Recirculated Submarine Groundwater Discharge Evaluated by Geochemical Tracers and a Seepage Meter at Two Sites in the Seto Inland Sea, Japan

Hydrology ◽  
2018 ◽  
Vol 5 (4) ◽  
pp. 61 ◽  
Author(s):  
Toshimi Nakajima ◽  
Ryo Sugimoto ◽  
Osamu Tominaga ◽  
Masaru Takeuchi ◽  
Hisami Honda ◽  
...  
Keyword(s):  
Submarine Groundwater Discharge ◽  
Groundwater Discharge ◽  
Seto Inland Sea ◽  
Water Fluxes ◽  
Offshore Area ◽  
Geochemical Tracers ◽  
Seepage Meter ◽  
The Seto Inland Sea ◽  
Submarine Groundwater ◽  
Inland Sea Of Japan

Submarine groundwater discharge (SGD) consists of fresh submarine groundwater discharge (FSGD) and recirculated submarine groundwater discharge (RSGD). In this study, we conducted simultaneous 25-hour time-series measurements of short-lived 222Rn and 224Ra activities at two sites with differing SGD rates in the central Seto Inland Sea of Japan to evaluate SGD rates and their constituents. At both sites, we also quantified the total SGD, FSGD, and RSGD using a seepage meter to verify the water fluxes estimated with 222Rn and 224Ra. SGD rates estimated using 222Rn and 224Ra at the site with significant SGD approximated the total SGD and RSGD measured by the seepage meter. However, SGD rates derived using 222Rn at the site with minor SGD were overestimated, since 222Rn activity at the nearshore mooring site was lower than that in the offshore area. These results suggest that the coupling of short-lived 222Rn and 224Ra is a powerful tool for quantification of FSGD and RSGD, although it is important to confirm that tracer activities in coastal areas are higher than those in offshore.

scholarly journals Traditional and novel time-series approaches reveal submarine groundwater discharge dynamics under baseline and extreme event conditions

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Trista McKenzie ◽  
Henrietta Dulai ◽  
Peter Fuleky
Keyword(s):  
Time Series ◽  
Submarine Groundwater Discharge ◽  
Extreme Event ◽  
Groundwater Resources ◽  
Groundwater Discharge ◽  
Time Lags ◽  
Storm Events ◽  
Relative Contribution ◽  
Intense Storm ◽  
Submarine Groundwater

AbstractGroundwater is a vital resource for humans and groundwater dependent ecosystems. Coastal aquifers and submarine groundwater discharge (SGD), both influenced by terrestrial and marine forces, are increasingly affected by climate variations and sea-level rise. Despite this, coastal groundwater resources and discharge are frequently poorly constrained, limiting our understanding of aquifer responses to external forces. We apply traditional and novel time-series approaches using an SGD dataset of previously unpublished resolution and duration, to analyze the dependencies between precipitation, groundwater level, and SGD at a model site (Kīholo Bay, Hawaiʻi). Our objectives include (1) determining the relative contribution of SGD drivers over tidal and seasonal periods, (2) establishing temporal relationships and thresholds of processes influencing SGD, and (3) evaluating the impacts of anomalous events, such as tropical storms, on SGD. This analysis reveals, for example, that precipitation is only a dominant influence during wet periods, and otherwise tides and waves dictate the dynamics of SGD. It also provides time lags between intense storm events and higher SGD rates, as well as thresholds for precipitation, wave height and tides affecting SGD. Overall, we demonstrate an approach for modeling a hydrological system while elucidating coastal aquifer and SGD response in unprecedented detail.

Sign in / Sign up

Export Citation Format

Share Document