Groundwater - Science topic

I am looking to obtain global-level groundwater extraction data for various sectors, including agriculture, industry, domestic use, and reservoir changes, with both spatial and monthly temporal resolution. Could anyone kindly provide data links or references to such datasets? Your assistance would be greatly appreciated. Thank you in advance.

Hello everyone,

I am a PhD student in Hydraulic Engineering at the School of Environmental Studies at China University of Geosciences (Wuhan), currently working on groundwater modeling. This research is essential for understanding and predicting aquifer behavior to contribute to sustainable water resource management, a crucial challenge in light of current climatic and human pressures.

To advance my work, I am looking for various types of hydrogeological data. Any information, regardless of location or format, would be incredibly helpful! Here are some examples of the data I particularly need:

I am open to any proposals or suggestions that could help me in this endeavor. Any contribution, even partial, would be invaluable for my research. Thank you in advance to those who may offer support or share this post.

Best regards,

ABARA A BIABAK INDRICK

Hello everyone,

My name is Abara Indrick, and I am a PhD student in Hydraulic Engineering at the School of Environmental Studies at China University of Geosciences (Wuhan). I am currently conducting research on groundwater modeling, with a focus on sustainable water resource management. My work aims to predict aquifer behavior in response to climate change and human pressures, helping to address some of today’s pressing environmental challenges.

However, I am facing a major obstacle in accessing the essential data needed to advance my project. Hydrogeological and hydrological data are crucial for constructing an accurate and representative model, but they remain challenging to obtain in my current situation.

I am open to data from any geographic region and any type of data, even partial, that could enrich my analysis. Here are some specific types of data I am seeking:

I am sincerely open to any proposals—whether raw data, guidance on reliable sources, or potential collaborations. If any researcher or professor has access to data relevant to these research areas, I humbly request your assistance in providing these resources. Such information would be foundational for the progress of my PhD thesis and would significantly contribute to scientific understanding of groundwater resources in arid and semi-arid contexts.

Every contribution, no matter how small, would make a real difference in the success of my work. I am deeply grateful to anyone who can assist or share this message to increase my chances of obtaining the necessary data.

Warm regards,

Abara Indrick

When I try to put the "water table" command in flac 2d version 7.0, I get a response that "Command not appopriate for used Configuration". How did I manage to solve this problem? Or does anyone know how to tell me the correct command for this version of FLAC?

To measure groundwater, a common technique is installing piezometers. However, inserting them can be somewhat difficult and time-consuming.

What are the main causes of salts in groundwater?

Are mountains a large reservoir of groundwater?

Is blue clay a cause of groundwater salinity?

Hi All,

I am looking for the Groundwater Vistas 6 manual which would help to work with MODFLOW. Is there anyone who could help me by providing version 6 in pdf?

Thank you.

Kind Regards,

Rahena

Is it better to drill groundwater wells in or near valleys?

Can groundwater be explored and detected by satellites?

How can groundwater salinity be reduced?

Does the deeper the wells are dug, the more abundant the groundwater is?

Is blue clay a sign of no groundwater?

Can it be said that groundwater is present in all areas?

Hello, I'm doing research on the degree of optimization of a groundwater monitoring network for a study area in The Netherlands. I'm conducting an elimination approach; monitoring wells that do not have informational relevance to the network are eliminated from the network. Now, I would like to analyze the sensitivity of the input data (groundwater level data of all monitoring wells) to understand how variations in the input data can affect the output of the model (optimal number of monitoring wells, monitoring wells that area eliminated). The sensitivity analysis would give insight into the reliability of the model, thinking of the eliminated monitoring wells and how I can minimize the RMSE of the model and MAE of the eliminated monitoring wells. What would be a suitable method for a SA in Python? I heard things about Monte Carlo and Sobol, but I'm not sure if those will fit in my Python script.

Many thanks in advance!

The recharge of deep sandy groundwater is slow. Does the high level of nitrate promote bacteriological activity knowing that it requires a high level of O2? Thanks

CO2 sequestration

[Homogeneous fluids; Heterogeneous fluids]

1. CO2 sequestration in deep-saline-aquifers/depleted-oil/gas-reservoirs: Does it pertain to a case of homogeneous fluid - corresponding

to a single-fluid phase?

If not, whether, the presence of a mixture of the two fluids (CO2 & brine) – resulting in CO2-brine gas-liquid interfaces,

which amounts to -

characterizing CO2 bubbles dispersed throughout the brine –

would really pertain to a homogeneous fluid scenario?

2. In case, if the injected CO2 is not exactly in pure gaseous form,

say, in super-critical form, then,

the injected super-critical fluid may also contain dissolved CO2 gas.

In case, if the aquifer/reservoir fluid pressures

fall below the saturation pressure, there could be a possible release of free CO2 gas within the aquifer/reservoir.

In such cases, can we still address such CO2 sequestration process –

to remain associated with a homogeneous fluid?

3. Eve when CO2 is injected in it’s pure gaseous form,

it may still contain a condensible vapor; and in case,

if such vapors are not in equilibrium with its condensed phase @ aquifer/reservoir temperature, then,

can we still address such CO2 sequestration process – to remain associated with a homogeneous fluid?

Do we really have a mixture of CO2-brine fluids,

which remain completely miscible, and

which, remains so, throughout the aquifer/reservoir –

in order claim it as a homogeneous fluid?

If not, then, how would - porosity and homogeneous-fluid permeability - allow to characterize the deep saline aquifer system,

with solid-grains acting as a carrier of a ‘heterogeneous fluid’?

In worst case scenario, if the fundamental aquifer/reservoir units (constants of a saline aquifer) are no more determined directly from field studies, then, how would the absolute values of liquid flux from an aquifer bearing CO2-brine mixture would really represent the in-situ heterogeneous fluid?

4. Just because heterogeneous fluids remain associated with complexities

in terms of deducing their solution, are we going to characterize a CO2 sequestration process associated either with a deep saline aquifer, or a depleted oil/gas reservoir system - based on the assumption of the homogeneity of the fluids?

If so, then, how about, future CO2 leakage?

5.  Whether the CO2 sequestration problem

is supposed to begin only @ the sand-face exposed by the well-bore?

Won’t the wellbore affect the conditions of CO2 pressure or CO2-flux

@ the sand face?

Suresh Kumar Govindarajan

Professor (HAG)    IIT-Madras

Underground Hydrogen Storage (UHS) in Aquifers

1. Since, hydrogen no more directly exists as a gas, how easy would it remain to separate hydrogen, either from water, or, from fossil fuels, despite its abundance in the universe?

2. Whether subsurface hydrogen(H2) storage has been tested in a commercial-scale environment – either in deep saline aquifers, or, in depleted oil/gas reservoirs (apart from salt caverns, practiced in Texas/UK), where, temporarily stored hydrogen has been produced back on demand?

3. Whether, saline aquifers, and/or, oil/gas reservoirs, towards H2 storage, is expected to ensure sustainability and resilience of the planned clean hydrogen economy in order to meet the global de-carbonization goal?

4. In the absence of H2 storage, in a thick, porous and permeable saturated subsurface formation (like a salt cavern), will we be able to satisfy required storage capacity and sufficient injectivity for acceptable well operating rates – either in saline aquifers, or, depleted oil/gas aquifers?

5. Whether, UHS is expected to provide storage capacity in order to balance seasonal supply and demand fluctuations; and also, to meet peak demand towards stabilizing the power grid?

6. How exactly to handle

(a)        The enhanced physical risk of hydrogen leakage (higher tendency of H2 to spread laterally in a porous reservoir increases the probability of escape of the stored H2 either through the abandoned/leaky wells or through the leaking faults)?

(b)       Reduced recoverability of stored H2 product – either in depleted oil/gas reservoirs, or, in deep saline aquifers – given the fact that the H2 remains associated with reduced viscosity and enhanced diffusivity (with reference to natural-gas)?

7. Unlike the minimum requirement of cushion gas in salt caverns, to what extent, cushion gas (employed to ensure sufficient pressure maintenance and adequate withdrawal rates) gets factored into the subsurface storage costs in saline aquifers and depleted oil/gas reservoirs?

8. Towards storing hydrogen in depleted oil/gas reservoirs, how easy would it remain to handle the dynamics of reservoir wettability (that impacts H2 injection and storage); viscous fingering (providing means for hydrogen loss); and the reactivity of H2 with the organic constituents of depleted oil/gas reservoirs (including kerogen, residual hydrocarbons and microbes – leading to H2 losses resulting from chemical or microbial interaction)?

9. Whether the greater compressibility of a cushion gas would really improve the H2 production rate @ the end of a production cycle

? 10.                  Whether the application of standard diffusion models would remain to suffice towards the estimation of the amount of H2 lost through dissolution into formation brine; and diffusing away from the aquifer of interest into the overlying caprock?

Suresh Kumar Govindarajan

Professor (HAG)  IIT-Madras

25-July-2024

CO2 Sequestration

[Isoplanes; normal gradients/vectors]

How exactly to deduce a system of isoplanes; and normal gradients, vectors and traces of the planes, in the three-dimensional space, in a CO2 sequestration application, associated with a deep saline aquifer,

(A) towards predicting the behavior of CO2 and brine?

(B) towards deducing representative pathways along which CO2 would most likely to travel in 2 or 3 dimensions (with reference to the resulting gradients)?

(C) towards predicting CO2-brine contact planes/surfaces?

(D) towards deducing the orientations of the planes of constant potential energy for CO2 occurring within the 3-dimensional space of the aquifer? &

(E) towards deducing an overall movement of CO2 that finds its way into leakage pathways?

Suresh Kumar Govindarajan

Professor (HAG) IIT-Madras

24-July-2024

CO2 sequestration [Reservoir Hydrodynamics 01]

With CO2 and brine being mobile, and in the presence of a complex coupled forces between viscous, gravity and capillarity, whether, the resulting pressure gradient would remain oriented non-vertically?

Following CO2 injection, whether the planes of constant pressure (isopressure planes) would remain to be non-horizontal?

Despite the fluctuating levels of potential energy within the fluid body, would it still diminish in the direction of CO2 movement?

Whether CO2-brine interface would remain to be non-horizontal following CO2 injection? If so, then, would it remain tilted in the direction of CO2 movement or potential energy decrease?

Since buoyancy is the major force acting on CO2 within a hydrodynamic deep saline aquifer, can we still expect the potential energy minima to remain located at the highest point in the aquifer?

Under hydrodynamic conditions, whether, the factors causing CO2 trapping would remain to change markedly in terms of aquifer geometry, size and location of CO2-plume pools?

Whether, compactional squeeze or tectonic uplift would lead to increasingly strong hydrodynamic forces, following CO2 injection? In such cases, whether, CO2 would remain to be pushed farther and farther from structural trapping sites until they are totally displaced and the original CO2 trapping features would remain to be completely filled with flowing brine?

In CO2 sequestration application, in deep saline aquifers, whether, the maximum internal pressure gradient (the direction in which the rate of pressure increase remains to the greatest) would remain to be perfectly vertical – given the internal migration of CO2 and brine?

With buoyant force playing a critical role, in the early stages, whether, all the internal forces would remain orientated vertically?

Whether the CO2-brine fluid contacts would remain to be parallel to the isopotential traces and normal to the specific force vectors?

Feasible to reorganize the probable migration paths of CO2-phase; and feasible to predict the orientation of CO2-brine interfaces, if the levels of potential energy associated with moving formation brine are mapped?

Suresh Kumar Govindarajan

Professor (HAG)  IIT-Madras

24-July-2024

What is the behavior of anaerobic bacteria in deep salty groundwater with high level of chlorine? Is the nitrate level deceasing and is denitrification controlled by excess chlorine? Thanks

CO2 Sequestration [Deep Saline Aquifers; Reservoir Simulation]

1.  While deducing a potential CO2 storage site,

(a) how to deduce the maximum & optimal CO2 storage volumes (considering geological uncertainty) – for an aquifer – with an average aquifer porosity varying between 20 and 30%; and with an average residual brine saturation between 15 and 30%?

(b) What kind of pressure regimes – are supposed to be favorable – for an aquifer, say, at a depth between 2 & 4 km below sea level; with an average formation thickness varying between 50 & 200 m; with lateral extensions spanning around 100 km each in north-south direction as well as in east-west direction?

(c) How should be the associated well access framework, if we have a large number of abandoned and potentially leaky wells (associated with a layered formation)?

(d) How to deduce the promising geological/hydrogeological properties – in the absence of having enough, log and core based porosity and permeability values from exploration wells?

OR

Will there be a need to drill wells – in the proposed CO2 injection location – for data analysis and geo-modelling?

(e) What are the encouraging seal/cap-rock properties?

(f) How to ensure an optimal proximity to the power-plant (taking into account the long-term pipeline solution from the field)?

2.  Feasible to have an evolving ‘conceptual model’ – considering the fact that the estimation of CO2 storage capacity in deep saline aquifers remains to be extremely challenging as a function of multiple (and coupled) CO2 trapping mechanisms that remain acting @ multiple time-scales?

If so, then, evolving models on risk and capacity analysis would remain to have - varying dominant effects - that should be accounted for?

3.  How exactly to deduce the volume of CO2 leakage that escapes through the aquifer boundaries – within a given time frame?

Feasible to locate, monitor and comment on the consequences of CO2 leakage at the early stages (in the absence of fault/fracture zones providing pathways for CO2 leakage)?

4.  How exactly to deduce an ideal geological model in the absence of having a complete data set associated with CO2/brine flow?

In such cases, whether a finer, vertical grid resolution would be of help – towards capturing the CO2-plume, which follows the impermeable roof of the formation – due to gravity override?

5.  What exactly dictates an appropriate boundary condition for a given aquifer – considering a possible CO2 leakage scenario in the near future – given the fact that – different choices of boundary conditions - would significantly influence - the time variation of pressure field and its associated CO2-plume spread?

6.  How exactly to delineate the ‘numerical diffusion’ emanating from grid refinements, which otherwise appear to be CO2 leakage into the formations above?

I have analyzed groundwater of the middle indo-gangetic plain and detected the Na ion concentration (90 mg/L) and Cl ion (1.7 mg/L). Is it possible?

Groundwater Resources and Climate Change

1. Asia uses 65% of groundwater, worldwide on an annual basis, while rest of the continents use significantly smaller fraction. If so, groundwater remains to be a threatened resource only for Asian countries; and no more a global threat?

2. Following the concept of sustainable energy use (Paris Agreement / COP28) across the globe, can we expect sustainable (ground) water use @ global-scale? Or, Is it a problem of only Asian countries? ‘Sustainable water use’ remains to be different from ‘sustainable energy use’?

3. Whether warming-climate mitigate groundwater availability uniformly in arid, semi-arid & humid regions?

4. 124 cubic-meter per capita in 1950 (groundwater use of 0.3 tera cubic-meters by 2.5 billion people) to 155 cubic-meter per capita in 2022 (1.2 tera cubic-meters by 8 billion people): How does climate-change influence groundwater usage? Or, is it energy usage (13 GWh per person in 1965 to 22GWh per person in 2022) that has influenced groundwater usage?

5. Does climate-change enhance over-draft (the condition of protracted groundwater withdrawal in excess of aquifer recharge that distresses multiple aquifers); and in turn, whether, climate-change (as against groundwater pollution) directly threatens groundwater ‘sustainability’ (safe yield of aquifers: the capacity of groundwater to offer helpful services to humans, while protecting the environment and groundwater-dependent ecosystems in permanency)? If so, what exactly is the role of ‘extreme (precipitation) events’ and its associated (new) recharge techniques?

6. Whether declining precipitation and surface-air temperature remain directly related across the globe?

7. How exactly sea water intrusion into coastal aquifers influence the intensity of groundwater depletion?

8. With increasing number of extreme rainfall events, how exactly, the recharge of storm-water and diverted surplus streamflow into aquifers would remain to be efficient?

9. Water-food-energy nexus: Corrective measures sufficient @ regional-scale, or, required @ global-scale – in the near future?

10. To what extent, the nature of new recharge technique – resulting from extreme rainfall events (associated with climate change) – remain to be different from conventional groundwater recharge technique (associated with a conventional rainfall-run-off event)?

Are we permanently losing groundwater?

How exactly climate-change gets connected with groundwater storage and transportation?

Although global aquifer storage capacity remains to be disappearing at the rate of around 20 cubic-kms per annum, the extreme rainfall events resulting from the current climate change would not make such loss of groundwater storage to remain to be permanent - resulting from the fact that the way the groundwater gets infiltrated from run-off, the way groundwater gets stored and the way the groundwater gets transported no more follows the conventional groundwater hydraulics in those regions that experience the extreme rainfall events. Thus, from the climate change effects, the physics or the drainage mechanism of the amount of groundwater that remains captured, stored and transported has altered significantly from the conventional groundwater hydraulics principle (and that’s the whole reason behind, whether, why this particular groundwater storage loss problem is not only associated with arid regions).

Although subsidence happens over those areas, where, groundwater has been exploited beyond threshold limits (such as in US and China, where land subsidence hangs around 40 – 60 mm per annum; but subsidence, in other places, mostly, remain to be less than 10 mm per annum), the groundwater at some other regions gets replenished (and again not by conventional means) and as such we require not just an improved groundwater management at the local-scale but we require groundwater management at the larger continental-scales spanning across the countries. Before we get into groundwater management, we got to investigate the modified drainage principles of fundamental groundwater flow mechanism, following extreme rainfall events. The essence is that the relation between surface-hydrology and sub-surface hydrology connected through unsaturated zone deserves a special attention towards understanding the way, groundwater gets recharged resulting from extreme rainfall events, and in fact, in a much faster way than expected. Nature never harms any living species as long as the nature is not getting disturbed, I suppose.

I am newbie in Plaxis 3d. I am trying to model a embankment for fly ash pond. I am facing the following error "Ultimate state not reached in groundwater flow analysis". The manual is suggesting to check the input parameters. Can anyone help me to understand what the error is about and what are all the parameters which i have to check for rectifying this error.

Importantly the features and the parameters to be considered

I just wanted to understand the objectives on groundwater exploration.

Dear Colleague,

I hope this message finds you well.

I am excited to announce the Call for Chapters for our upcoming book project titled "Applying Remote Sensing and GIS for Spatial Analysis and Decision-Making," scheduled to be published by IGI Global.

We are seeking contributions from researchers and practitioners who are passionate about exploring the application of remote sensing and GIS technologies in spatial analysis and decision-making processes. Your expertise and insights would greatly enrich the content of our book, and we cordially invite you to submit a proposal for a chapter.

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Should you have any inquiries or require further information, please do not hesitate to contact me . I am more than happy to assist you throughout the submission process.

Thank you for considering this opportunity to contribute to our publication. We look forward to receiving your proposals and collaborating with you on this exciting project.

Best regards,

Adil Moumane

University of Ibn Tofail. Kenitra, Morocco

Travertine is common to see in hot spring, its main component is calcite. The solubility of calcite decreases with increasing temperature, and seems CO2 degassing makes calcite harder to deposit. So if calcite is saturated in deep-hot aquifer, it won't saturated when fountain? But why we can see travertine nearby a hot spting?

Subject Areas and Keywords:

Groundwater Prospecting

Borehole Siting

Safe Yield

Groundwater Recharge

Groundwater Quality

Groundwater Contamination

Aquifer Mapping

Geophysical Surveys

Aquifer Hydraulic Tests

Groundwater Discharge

Emerging Organic Contaminants

Hydrogeochemical Processes

Can the actual display of snow be shown as a map? Like snow border - snow depth - scDs snow levels - snow covered days - to find out the water storage in the seasons?

what is the best geophysical machine or device for detecting groundwater? Are there any machine that can detect the depth and the type of water? do I have to buy one machine or more than one to get the accurate result?

Nutrient input through submarine groundwater discharge (SGD) reveals the river inputs as well as groundwater input and may play a significant role in nutrient cycling and primary productivity in the coastal ocean. Can submarine groundwater discharge be identified using phytoplankton or chlorophyll's data in seawater?

I am looking to grow vegetables. I want to prepare the ground soil and ground water in my farm to optimum conditions. Like to know how to do it.

I have groundwater level data. How can I measure the groundwater recharge?

What is the easiest way?

How do I generate ROC AUC specifically in ArcGIS environment for validation of Groundwater Potential zones?

I have generated groundwater potential zones using AHP technique with 3 classes.

and I want to validate my result with existing yield data (212 wells). what are the steps to Feloow?

can anyone please share with me the old version of ArcSDM too with ROC tool ?

Hellow!

Actually, I want to delineate the groundwater potential zone by using the FR model.

But I am confused about groundwater well data that is used for in different research purposes. Most of the paper divides the data into two sets (training and testing) for validation and FR calculation. But, for my study area, that falls into only 19 wells. So i am confused that, can i divided it training and testing datasets or 19 well used for both validation and FR calculation?

Please suggest me.

Thanks in advance.

I am trying to set up groundwater flow model over the Ganga Basin (0.4 million sq km) using Modflow. I am using Visual Modflow Classic and Modflow 2005 engine. I had set up the transient model but I am facing some difficulties. Therefore I am attempting to set up steady state simulation using lone term average values of pumping at each of the 3800 locations of pumping wells and similarly long term average for recharge, lateral inflow, boundary conditions. However, the model shows an error as soon as I click the run button (after model translation). I have attached the.LST file. The error in the file refers to row 1 and column 500 but the corresponding grid is an inactive cell in the model. Can you please help me decode the error and rectify it?

we need books and lectures on the interaction of seawater with groundwater. can you help me please.

During my field sampling, I collected one set of unfiltered groundwater samples i.e. acidified with a few drops of concentrated HCl. Can someone please help me how to prepare samples and get data from the TOC ANLYSER?

In Water Resources Engineering, the sizing of reservoirs depends on accurate estimates of water flow in the river that is impounded. For some rivers, long-term historical records of such flow data are difficult to obtain. In contrast, meteorological data on precipitation have often been available for many yearst. Therefore, it is often useful to determine a relationship between flow and precipitation. This relationship can then be used to estimate flows for years when only precipitation measurements were made. For example, the following data are available for a river that is to be dammed:

Precipitation=[88.9 108.5 104.1 139.7 127 94 116.8 99.1]

Flow=[14.6 16.7 15.3 23.2 19.5 16.1 18.1 16.6]

How can I put the best line with linear regression to predict the annual water flow on the data?

if the drainage area is 1100 km2, estimate what fraction of the precipitation is lost via processes such as evaporation, deep groundwater infiltration, and consumptive use.

What is the most easy-to-use and effective software that helps with groundwater studies?

Oceans and seas are very salty, we suppose that because they are of very low ground,waters come to them and water evaporates and then become salty.

Dear scientific comunity I want to know the main differences between the groundwater recharge zones and groundwater potential zones ? And how can I predict each one of them

Thank you for considering my question

Organic pollutants in ground 💧 water.

is Modflow 6 adequate to model the interactions between the river and the groundwater using the package (river) or I have to use another version like GSFLOW or any other one.

I am looking at tidally influenced groundwater at Longview, WA. This is 67 miles upriver from the mouth of the Columbia River but there is tidal influence.

Hi,

I am using MODFLOW5 within Groundwater Vistas. I inserted pumping shapefile and well data into it with negative sign (as pumping is going out from the system). But after simulation it shows as positive value and counts as input value in water balance. May be I am doing/counting something in a wrong way.

Could you please share your experience/expertise regarding this issue?

Thank you.

Rahena

We are looking for temperature variations in shallow aquifers (fresh water) and deep aquifers (saline water) in ganga plane.

If there is any relevant data or papers, kindly share.

Bests regards and thanks

Amar

Springs sourced by shallow aquifers often exhibit a temperature signal that mimics the seasonal harmonic air temperature signal, albeit significantly damped and lagged. If conduction does not dominate, it seems possible that numerical models could be employed to gain an understanding of shallow subsurface flow regimes from the degree of damping or lagging in the spring temperature. I suspect that it could be an unconstrained problem unless either the aquifer dimensions or thermal properties were known.

This would be somewhat analogous to how the damping of the stable isotope ratio seasonality is used as a tracer in catchment hydrology. In the present case, the groundwater discharge temperature would have to be recorded prior to mixing with the surface water.

Suggestion on any particular software? Please mention below...

I am a PhD student working in groundwater studies. Please provide a reference for hydrated radius of various uranyl complexes viz. UO2(2+), UO2(CO3)3(4-), UO2(CO3)2(2-) and UO2CO3(aq)

Is Canadian Council of Ministers of the Environment Water Quality Index (CCME WQI) applied for groundwater to check water quality?

Does anybody know the caprock of an aquifer for CO2 disposal that is mainly made of calcite and siderite?

Thanks in advance.

i need a complete guide on how to undertake M.Sc Project on the above topic

The Department of Analysis of marine ecosystems and anthropogenic impacts of the Ukrainian Scientific Center of Ecology of the Sea, where I work, is going to apply for EURIZON Fellowship and we need a partnership from European Union. Here are the details of the program https://indico.desy.de/event/38700/.  The deadline is on 8/05. The name of the project is " The investigation of small saline groundwater dependent ecosystems biodiversity the arid zone (Odesa region, Ukraine) and evaluation it pre-war conditions. ". We have an archive with samples of zoobenthos and zooplankton, collected at ~190 sampling points on different substrates within ~ 30 limnocrenes, rheocrenes and helocrenes with salinity over 5 ‰ different seasons during the free time 2017-2021. We are planning to use this archive for the EURIZON fellowship, but because of war, our institution has no opportunity to take new samples in the Black Sea and limans.

I have to several colleges from Finland and Germany, but now they can take part. So I hope for the help of RG community.

Hello dear scientific community i want to know the steps to follow to determine the groundwater flow direction in fractured system using arcgis?

Thank you for considering this question

Hello,

I have a technical question, I want to create a groundwater table map for a mountainous area characterized by a discontinuous aquifer. the main issue I'm facing is the lack of borewell data (I have a few numbers of wells data with information on depth to groundwater table). However, this region is characterized by numerous springs which I know the coordinates.

Is it possible to merge the spring data with the wells to create a groundwater table map of this region?

Thank you for your consideration

Assessment of the PAHs contamination threat on groundwater: a case study of the Niger Delta region of Nigeria

Chimezie Anyakora and Herbert Coker

Published Online:15 Dec 2009

Hello there, respected researchers.

From where I can get the data of Volume of Aquifer ?

CO2 Sequestration

1.  At the laboratory-scale investigation, how do we justify, the selection of suitable geological formations for storing CO2 - associated with the field-scale investigation that includes

(a) a relatively larger aquifer/reservoir permeability that will allow injection of CO2 with a relatively higher injection rate;

(b) a relatively larger reservoir/aquifer porosity that would allow, a relatively larger volume of CO2 storage;

(c) an impermeable cap rock with a relatively high capillary entry pressure;

(d) a geological formation that would necessarily impede the upward movement of CO2 and subsequently arresting the possible escapement of CO2 into the atmosphere?

2.  In a real field scenario, we require a minimum depth of 800 m in order to ensure that the injected CO2 is in supercritical state. However, by just maintaining CO2 density range (200 – 900 kg/m3) and CO2 viscosity range (4e-05 – 7e-05 Pa-s) with temperature exceeding 31 degrees C and pressure exceeding 7.4 MPa, CO2 will automatically be in a supercritical state thermodynamically at the laboratory-scale.

Thus, in the absence of a complex porous medium with its associated depth factor at the laboratory-scale, would it remain feasible to upscale the laboratory-scale observations to a real field scenario towards CO2 sequestration?

Does laboratory-scale investigation on CO2 capture and sequestration also include (a) the costs; (b) the regulatory factors; (c) the legal logistical frameworks - associated with capture, transport and monitoring of CO2?

What is the fraction of the total anthropogenic release of CO2 (roughly 40 billion tonnes per annum globally) that has been sequestrated so far globally?

3.  With varying spatial as well as temporal scales - associated with the structural, residual, solubility and mineralization trapping, how would it remain feasible to track the trapping mechanisms - associated with the injection and storage of CO2 at the laboratory-scale?

4.  To what extent, we had been successful in reducing anthropogenic greenhouse gases, particularly, CO2’s share in total emissions: (a) between 2015 – 2020 (5 years following Paris agreement); and (b) between 2021 – 2022 (last couple of years); which is conceived to be one of main drivers of climate change in terms of global temperature rise?

5.  To what extent, the major sources of atmospheric CO2 keep reducing – following the Paris agreement in 2015 – resulting from the consumption of fossil fuels by (a) industrial activities; (b) electricity generation; and (c) transportation sector?

All the above three sources of atmospheric CO2 remain to be in descending trend from 2015?

6.  Albeit the abundant availability and a relatively lower cost of fossil fuels, whether the use of fossil fuels remains to be steadily vanishing and keep losing its place from the position of world’s most important and primary source of energy?

Problems associated

methodology

recommendations

During my field study, I collected Groundwater samples and filtered them sequentially using 0.2um, 50kDa, and 3kDa. But when I analyzed these samples in the Shimadzu TOC analyzer, I got DOC concentration is high in 50 and 3 kDa in comparison to 0.2um.

3kDa = 44ppm

How is it possible? Can anyone please explain?

hello, I am looking for some good groundwater geochemistry models for my research. Can you please s suggest a few?

The interpolation of the initial heads in Modflow yields values above the ground surface. I supplied a grid file of initial heads, containing the already interpolated head values using rigging with external drift to ensure the ground surface elevation is also taken into account. However, MODFLOW still interpolates the head values. However,, the result is not good. I do not have Groundwater Vistas to convert the grid file into .HEADS file. I checked the .VIH and .BAS files, but I don't think I will be able to edit these files since the study area is vast and very confusing. Has anyone faced a similar problem? Please help.

Dear colleagues,

Do you know a source for groundwater time series data covering Jordan or the Levant?

I am particularly interested in

- daily, monthly, and annual data from

- spatial distribution across Jordan/Levant deriving from

- public domain/research institutions/NGOs over the

- time period 2001-2022

Many thanks for your suggestions and feedback!

For data sharing and questions or just a quick chat drop me an email:

kempf(a)geographie.uni-kiel.de

Cheers!

Michael

______

contact:

Dr. Michael Kempf

Christian-Albrechts-Universität zu Kiel Department of Geography Physical Geography -- Landscape Ecology and Geoinformation Ludewig-Meyn-Str. 8 (R. 04.032) 24098 Kiel, Germany