scholarly journals Using 222-radon surveys and regional scale groundwater models to evaluate groundwater discharge to Lake Simcoe

2019 ◽  
Author(s):  
C Robinson ◽  
H Wallace ◽  
E J Wexler ◽  
S Malott
Keyword(s):  
Regional Scale ◽  
Groundwater Discharge ◽  
Lake Simcoe

Königshafen Submarine Groundwater Discharge Network (KiSNet)

2020 ◽  
Author(s):  
Ulf Mallast ◽  
Hannelore Waska ◽  
Nils Moosdorf
Keyword(s):  
Temporal Variability ◽  
Submarine Groundwater Discharge ◽  
Chemical Constituents ◽  
Regional Scale ◽  
Groundwater Discharge ◽  
Interdisciplinary Approach ◽  
Biological Indicators ◽  
Spatial And Temporal Variability ◽  
Flux Data ◽  
Submarine Groundwater

<p>Submarine groundwater discharge (SGD) as a pathway for water and chemical constituents between land and ocean is a rather young topic. For a long time it has been neglected by the scientific community and coastal managers. However, it has increasingly attracted attention since the turn of the millennium. Yet, SGD is mostly investigated either by terrestrial or marine disciplines although a broader, interdisciplinary approach would benefit SGD research. Moreover, so far reported SGD flux data at local to regional scale are a) hardly comparable as, to our best knowledge, only a few, mostly isolated studies directly compared available SGD methods in a quantitative fashion and b) flux data contain large uncertainties, either because they were up-scaled from local discrete (point) measurements to regional scales or because they were derived from modelling/ budgeting of regional or even global matter fluxes despite the known high spatial and temporal variability. </p><p>In order to pave the way for a more standardized and interdisciplinary SGD research that would reduce inherited measurement/ extrapolation uncertainties, the Königshafen Submarine Groundwater Discharge Network (KiSNet)  seeks to contribute through three concrete aims:  </p><ol><li>forming an interdisciplinary group of SGD experts to initiate and intensify collaborative ties across disciplines</li> <li>improving individual methodologies by groundtruthing through interdisciplinary intercomparison, which includes a focus on spatial and temporal variability, and</li> <li>providing a method catalogue which outlines optimal combinations for qualitative and quantitative SGD investigations that may serve as basis for future standardized SGD research.</li> </ol><p>The network will convene at the bay of Königshafen on Sylt, Germany, during two different points in time. Each time, all members of the network will apply qualitative (remote sensing, marine and terrestrial ground-based geophysics, biological indicators and socio-scientific methods) and quantitative (seepage meters, temperature rods, natural tracers, numerical simulation) methods from terrestrial and marine disciplines to investigate SGD synchronously and provide a robust basis to tackle above mentioned aims. </p><p>Here, we will outline exact procedures, methods and anticipated results the network will produce and provide an overview on future actions the network anticipates.</p>

scholarly journals Latvijas hidroģeoloģiskā modeļa LAMO izveidošana, izmantošana un pilnveidošana

2019 ◽  
Vol 57 ◽  
pp. 5-14
Author(s):  
Aivars Spalviņš ◽  
Kaspars Krauklis ◽  
Oļģerts Aleksāns ◽  
Inta Lāce
Keyword(s):  
Regional Scale ◽  
Groundwater Discharge ◽  
Open Data ◽  
Geographical Information ◽  
Development Fund ◽  
European Regional Development Fund ◽  
Model Set ◽  
Near Future ◽  
European Regional

Pasaules un Eiropas Savienības valstīs reģionāli hidroģeoloģiskie modeļi (HM) apkopo ģeoloģisko un ģeogrāfisko informāciju, kuru izmantojot, var aprēķināt sarežģītus telpiskus pazemes ūdens līmeņu un plūsmu sadalījumus, kā arī pazemes un virszemes (upju, ezeru) ūdensobjektu mijiedarbību. Izmantojot reģionālos HM, var racionāli plānot valsts ūdens resursu ilgtspējīgu izmantošanu. Izmantojot lokālus detalizētus HM, kurus iegūst, papildinot reģionālā HM datus, var efektīvi veikt vides un dabas aizsardzības un atveseļošanas darbus. Rīgas Tehniskās universitātes (RTU) Vides modelēšanas centra (VMC) zinātnieki 2011.–2015. gadā izveidoja Latvijas HM (LAMO) versijas: LAMO1→LAMO2→LAMO3→LAMO4. Versija LAMO4, kas dod nozīmīgus HM iespēju un rezultātu kvalitātes uzlabojumus, tika pārbaudīta laikā no 2016. gada līdz 2018. gadam, īstenojot pazemes ūdens procesu pētījumus (kas iespējami tikai reģionālā HM vidē) un risinot praktiskus uzdevumus, izmantojot lokālus HM. LAMO4 dati, kas veido ģeotelpiskās informācijas kopu,  ir brīvi pieejami RTU VMC tīmekļa vietnē. Šie unikālie dati jāievieto portāla “geolatvija.lv” iedaļā “Hidroģeoloģiskie dati” kā valsts budžeta finansēts bezmaksas pakalpojums. Izmantojot LAMO4 aprēķinātos datus par upju pazemes pietecēm, var izveidot Latvijas upju tīkla datormodeli upju piesārņošanas procesu pētīšanai. Ir iespējama LAMO4 pilnveidošana – LAMO4→LAMO5→LAMO6 –, kas ietver HM detalizācijas uzlabošanu un pazemes ūdens kvalitātes ievērošanu. RTU ir īstenojusi LAMO projektu, izmantojot Eiropas Reģionālā attīstības fonda (2011.–2012. g.) un valsts pētījumu programmas “EVIDEnT” (2014.–2018. g.) finansējumu.  Regional hydrogeological models (HM) are founded on geological and geographical information of a country. By processing this information, HM can provide complex spatial distributions of groundwater heads and flows, data on groundwater discharge into rivers and lakes as their joining with groundwater bodies. Appliance of the regional HM considerably improves the quality of the country’s sustainable water management, because HM provides consolidated knowledge on the interaction between surface water and groundwater and on their accessible resources. For solving practical problems of environmental protection and recovery, local HM are applied. They are created by completing the data of regional HM by more detailed information. In 2011–2015, scientists of Environment Modelling Centre (EMC) of Riga Technical University (RTU) developed four successive versions of the regional HM of Latvia: LAMO1→LAMO2→LAMO3→LAMO4. The current version LAMO4 has been tested and approbated in 2016–2018, by carrying out the research on nature processes on regional scale and also by using local HM. Presently, the information regarding the development and appliance of LAMO4 is available at the RTU EMC web site. In the near future, this information, as the set of geospatial data, will be inserted in the section “Hydrogeological data” of the portal “geolatvija.lv”. By using information provided by LAMO4 on the groundwater discharge in rivers, it will be possible to develop a computer model for the research of pollution processes in the river network of Latvia. In the future, the development of LAMO4→LAMO5→LAMO6 will considerably improve the credibility and quality of the data provided by modelling. For the next version LAMO5, the model set of lakes and rivers will be increased and the plane approximation step of 125 meters will be used (LAMO4 has the step of 250 meters). The version LAMO6 is the expansion of LAMO5 by adding information on groundwater quality and by providing advanced open data options. The research on LAMO development was supported by the European Regional Development Fund (2011–2012) and by the Latvian State Research Program “EVIDEnT” (2014–2018).

scholarly journals Applicability of Landsat 8 Thermal Infrared Sensor to Identify Submarine Groundwater Discharge Springs in the Mediterranean Sea Basin

2020 ◽  
Author(s):  
Sònia Jou-Claus ◽  
Albert Folch ◽  
Jordi Garcia-Orellana
Keyword(s):  
Mediterranean Sea ◽  
Submarine Groundwater Discharge ◽  
Regional Scale ◽  
Groundwater Discharge ◽  
Thermal Infrared ◽  
Landsat 8 ◽  
Infrared Sensor ◽  
Hydrogeological Characteristics ◽  
Submarine Groundwater ◽  
The Mediterranean

Abstract. Submarine groundwater discharge (SGD) has received increasing attention over the past two decades as a source of nutrients, trace elements and pollutants to the ocean that may alter coastal biogeochemical cycles. Assessing submarine groundwater flows and their impacts on coastal marine environments is a difficult task since it is not easy to identify and measure these water flows discharging into the sea. The aim of this study is to prove the great usefulness of the freely-available thermal infrared (TIR) imagery of the Landsat 8 thermal infrared sensor (TIRS) as an exploratory tool to identify SGD springs worldwide, from local to regional scales, for long-term analysis. The use of satellite thermal data as a technique to identify SGD springs in seawater is based on the identification of thermally-anomalous plumes obtained from the thermal contrasts between groundwater and sea surface water. We propose a conceptual framework to apply this technique worldwide and also discuss the limitations of using this technique in SGD studies. The study was developed on a regional scale in karstic coastal aquifers in the Mediterranean Sea basin at different seasons and diverse meteorological conditions. Although this study demonstrates that the freely-available satellite TIR remote sensing is a useful method to identify coastal springs in karst aquifers both locally and regionally, the limiting factors include technical limitations, geological/hydrogeological characteristics, environmental and marine conditions and coastal geomorphology.

Regional-scale mapping of groundwater discharge zones using thermal satellite imagery

2013 ◽  
Vol 28 (23) ◽  
pp. 5662-5673 ◽  
Author(s):  
G. Z. Sass ◽  
I. F. Creed ◽  
J. Riddell ◽  
S. E. Bayley
Keyword(s):  
Satellite Imagery ◽  
Regional Scale ◽  
Groundwater Discharge

Koreans across the Sea: Migration of Laborers to the Metropole, 1910–1937

2019 ◽  
pp. 161-200
Author(s):  
Mikwi Cho
Keyword(s):  
Capital Accumulation ◽  
Regional Scale ◽  
Living Conditions ◽  
Colonial Period ◽  
Global City ◽  
Japanese Empire ◽  
Chain Migration ◽  
Free Mobility

This paper is concerned with Korean farmers who were transformed into laborers during the Korean colonial period and migrated to Japan to enhance their living conditions. The author’s research adopts a regional scale to its investigation in which the emergence of Osaka as a global city attracted Koreans seeking economic betterment. The paper shows that, despite an initial claim to permit the free mobility of Koreans, the Japanese empire came to control this mobility depending on political, social, and economic circumstances of Japan and Korea. For Koreans, notwithstanding poverty being a primary trigger for the abandonment of their homes, the paper argues that their migration was facilitated by chain migration and they saw Japan as a resolution to their economic hardships in the process of capital accumulation by the empire.

Zooplankton community responses to regional-scale weather variability: a synoptic climatology approach

2015 ◽  
Vol 62 (3) ◽  
pp. 189-198 ◽  
Author(s):  
AL Primo ◽  
DG Kimmel ◽  
SC Marques ◽  
F Martinho ◽  
UM Azeiteiro ◽  
...  
Keyword(s):  
Regional Scale ◽  
Zooplankton Community ◽  
Synoptic Climatology ◽  
Community Responses ◽  
Weather Variability
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