GMS, SMS, and WMS User Forum

# Saubhagya Singh

Members

46

## Community Reputation

0 Neutral

• Rank
Senior Member
• Birthday 12/23/1991

## Profile Information

• Gender
Male
• Location
Atlanta (GA), USA
• Interests
Research Interests:
- Groundwater Modelling
- Numerical simulation using FDM and Mesh-free technique
- Fate and Transport of Contaminants in Sub-surface Flows
- Numerical and Analytical Modelling of Transport Processes
- Seawater Intrusion
- Numerical and Analytical Modelling of Density Driven Flows

My hobbies include playing frisbee, horse-riding, mentoring people, listening Sufi and Marwari folk music

## Contact Methods

• Skype
saubhagya.rathore

## Recent Profile Visitors

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1. ## Monte Carlo for Vertical Slice of the Aquifer

Dear Forum Members, I am trying to perform Monte-Carlo simulation in a vertical slice of the aquifer (x-z plane). I want to generate around 100 realizations of the spatially-correlated hydraulic-conductivity random field in 2D (x-z plane). Then I want to solve flow and transport for each realization and analyze the ensemble of results. I explored options in GMS and this is what I found out (correct me if I am wrong): 1) Stochastic Modeling Option: It is not possible to generate 2D field (spatially varying K values) using this option. 2) Interpolation using 2D Scatter Point To
2. ## Importing K Field from Excel

Good Morning Forum Members, Is it possible to import a 2D (x-z plane) K field for a vertical slice of a heterogeneous aquifer? Or my only option is to paste layer-by-layer values in the LPF package? Thank You Saubhagya
3. ## Flow budget in an unconfined aquifer (MODFLOW)

Ah! Now "Rewetted" makes sense to me. Don't know how I missed that haha! Thank you so much!
4. ## Flow budget in an unconfined aquifer (MODFLOW)

The figure in my previous comment shows the result when no rewetting was required as initial heads were equal to the higher boundary-head. But in the case where I have initial heads equal to lower boundary-head, the cells near the higher-head boundary never get wetted. I will try some more combinations of wetting parameters.
5. ## Flow budget in an unconfined aquifer (MODFLOW)

Hi Michael, Thank you for your answer. Yes, I also think that. I did not have rewetting on. However, I tried various combinations of rewetting parameters but nothing helped. Finally, I had initial heads set to higher boundary-head, which then did not require rewetting and it worked (Figure attached). However, do you have any suggestion how can I have rewetting enabled? I used the wetting parameter as low as 0.01 still rewetting did not happen.
6. ## Flow budget in an unconfined aquifer (MODFLOW)

Here is an example of a single-density flow width domain length as 53 cm, hydraulic conductivity as 20 cm/min and boundary heads as 21 cm and 22 cm. Theoretical calculation based on Darcy's law yields 8.11 cm^2/min, however, the flow budget in the model described below shows 7.9186 cm^2/min as the flow near the inland boundary which is exactly the value we would obtain if we consider a confined aquifer of thickness 21 cm and other parameters same as above. This suggests that flow budget does not account for the flow above the elevation equal to the lower boundary head. Also, there are not velo
7. ## Flow budget in an unconfined aquifer (MODFLOW)

Dear community members, I am trying to numerically evaluate the discharge in an unconfined coastal aquifer with a constant head as the inland boundary. After performing SEAWAT simulation, the flow rate value in the flow-budget for any cross-section close to the inland boundary reflects only the flow below the sea-level. I also confirmed this by plotting velocity-vector plot, in which there were no velocities plotted in the region above the sea-level and below the water table. I have attached the picture for clarity. Is there a way I can get the total value of the freshwater discharge in t
8. ## Uncoupling in SEAWAT

I am trying to simulate HENRY's problem in SEAWAT. But I would like to remove the effect of density on flow and simulate uncoupled flow conditions. Can anyone suggest how to do that? I tried to make slope of density to concentration equal to zero then that doesn't seems to be working. Thank you
9. ## Constant Concentration Condition in Grid Approach

Thanks Bill. It was really helpful
10. ## Constant Concentration Condition in Grid Approach

I am not able to find a way to give constant concentration boundary condition in Grid Approach. The option is only for starting concentration. Any help in this regard will be appreciated. Thank You
11. ## Specified Flow or HFB (Horizontal flow Barrier) for No flow boundary condition

Thanks Chaachoua and Alan
12. ## Specified Flow or HFB (Horizontal flow Barrier) for No flow boundary condition

Thanks Alan, Still can you tell will both methods goes fine with no flow boundary ?
13. ## Specified Flow or HFB (Horizontal flow Barrier) for No flow boundary condition

Hello Everyone, I have a doubt in specifying no-flow boundary condition, Should it be done with making specified flow 0 , or should it be by horizontal barrier? Any help will be appreciated, Thanks in advance Saubhagya
14. ## Thickness of aquafer, Aquitard

Thanks Lance, Actually I was making a transient MT3D model, that is why there was no check box for steady state.