Dr. Kunwar Mrityunjai Sharma

Interactive Simulations

Dedicated Computational Process Models

2D Aquifer Contaminant Transport

Features interactive point-source placement, directional groundwater velocity gradients, dispersion dynamics ($\alpha_L, \alpha_T$), radioactive decay, and glowing concentration heatmaps.

Launch Transport Model

2D Channel Network Model

Features FDM Gauss-Seidel hydraulic solver, log-normal conductance distributions (σ), and flow-proportional 50-particle advective transport built with pychan3d principles.

Launch CNM Model

Matrix Infiltration Dynamics

Simulates variably saturated infiltration across clay barriers and soil profiles using Richards' equation dynamics, suction head (ψ), and transient wetting fronts.

Launch Infiltration Model

KBS-3 DGR Thermal Layout

Examines thermal decay and plume interference across 8 KBS-3 canisters at -450 m depth as a function of canister/drift spacing (S) and host rock thermal conductivity (k).

Launch DGR Thermal Model

Career History

Research Experience

Senior Scientist

VTT Technical Research Centre of Finland | May 2023 – Dec 2025

Led numerical flow and solute transport modeling in low-permeability rock and engineered barrier caps for national safety frameworks (SAFER, SAGE, HAGEN).
Developed customized Python packages to convert 3D fracture networks into calculation matrices and coupled finite-element output with GoldSim.

Researcher & Postdoctoral Fellow

Uppsala University, Sweden | Dec 2019 – Dec 2022

Developed tracer transport models for deep geological repository safety programs funded by the Swedish Radiation Safety Authority (SSM).
Refactored and optimized the open-source pychan3d Python package to translate Discrete Fracture Networks into Channel Network Models.

Peer-Reviewed Research & Proceedings

Scientific Publications

1. Impact of Rainfall Patterns on a Near-Surface Radioactive Waste Disposal Facility: Climate Change and Long-Term Perspectives

Park, J.B., Sharma, K.M. (2025)

Journal of Nuclear Fuel Cycle and Waste Technology, 23(2), 239-264.

DOI: 10.7733/jnfcwt.2025.016

2. Characteristics of flow and transport in low-permeability fractured rock based on a channel network model

Sharma, K.M., Tsang, C.-F., Geier, J., Pensado, O., Stothoff, S., Niemi, A. (2025)

Advances in Water Resources, 202, 105016.

DOI: 10.1016/j.advwatres.2025.105016

3. Channel Network Model of Flow and Transport in Low-Permeability Fractured Rock and its Characteristics

Sharma, K.M., Tsang, C.F., Geier, J., Pensado, O., Stothoff, S., Niemi, A. (2023)

SSRN Electronic Journal, 5012672.

DOI: 10.2139/ssrn.5012672

4. Channel network modeling of flow and transport in fractured rock at the Äspö HRL: Data-worth analysis for model development, calibration and prediction

Dessirier, B., Sharma, K.M., Pedersen, J., Tsang, C.F., Niemi, A. (2023)

Water Resources Research, 59(5), e2022WR033816.

DOI: 10.1029/2022WR033816

5. Apparent flow-dimension approach to the study of heterogeneous fracture network systems

Sharma, K.M., Dessirier, B., Tsang, C.F., Niemi, A. (2023)

Hydrogeology Journal, 31(4), 873-891.

DOI: 10.1007/s10040-023-02796-3

6. An investigation into flow and transport in a complex fracture network in deep crystalline rock based on a channel network model

Sharma, K.M., Geier, J., Dessirier, B., Stothoff, S., Pensado, O., Tsang, C.F. (2022)

The XXIV International Conference on Computational Methods in Water Resources (CMWR 2022), Gdańsk, Poland.

7. Calibration of a channel network model against Äspö field data and its application to long term prediction of tracer transport

Dessirier, B., Sharma, K.M., Tsang, C.F., Niemi, A. (2022)

European Geosciences Union (EGU) General Assembly 2022, Vienna, Austria.

DOI: 10.5194/egusphere-egu22-9706

8. Simplified Computations of Radionuclide Transport in Complex Fracture Networks in Deep Crystalline Rock

Pensado, O., Stothoff, S., Sharma, K.M., Geier, J., Niemi, A., Tsang, C.F. (2022)

Proceedings of the 2022 International High-Level Radioactive Waste Conference.

9. Use of apparent flow dimension in transient pressure analysis to evaluate non-uniform flow in heterogeneous porous media

Sharma, K.M., Dessirier, B., Tsang, C.F., Niemi, A. (2022)

EGU General Assembly Conference Abstracts, EGU22-9617.

DOI: 10.5194/egusphere-egu22-9617

10. Three-dimensional simulation of fluid flow through a discrete fracture and matrix

Sharma, K.M., Sharma, L.K., Ansari, M.T.A., Singh, T.N. (2021)

Geolinks Conference Proceedings.

11. Empirical Slope Stability Assessment Along the Road Corridor NH-7, in the Lesser Himalayan

Ansari, T.A., Sharma, K.M., Singh, T.N. (2019)

Geotechnical and Geological Engineering, 37, 5391-5407.

DOI: 10.1007/s10706-019-00988-w

12. Micro-pores and fluid flow - a numerical study

Sharma, K.M., Sirdesai, N.N., Tripathy, A., Singh, T.N. (2018)

ARMA US Rock Mechanics/Geomechanics Symposium, ARMA-2018-933.

13. Experimental study to examine the independent roles of lime and cement on the stabilization of a mountain soil: A comparative study

Sharma, L.K., Sirdesai, N.N., Sharma, K.M., Singh, T.N. (2018)

Applied Clay Science, 152, 183-195.

DOI: 10.1016/j.clay.2017.11.012

14. Physical and Numerical Model to Investigate Shallow Tunnel Instabilities in Loose Soil

Das, R., Sharma, K.M. (2018)

International Conference on Geomechanics, Geo-energy and Geo-resources (IC3G-2018), Chengdu, China.

15. Parametric study of factors affecting fluid flow through a fracture

Sharma, K.M., Roy, D.G., Singh, P.K., Singh, T.N. (2017)

Arabian Journal of Geosciences, 10, 362.

DOI: 10.1007/s12517-017-3142-6

16. Evaluating the modulus of elasticity of soil using soft computing system

Sharma, L.K., Singh, R., Umrao, R.K., Sharma, K.M., Singh, T.N. (2017)

Engineering with Computers, 33(3), 497-507.

DOI: 10.1007/s00366-016-0486-6

Computational Hydrogeologist & Subsurface Scientist

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2D Aquifer Contaminant Plume Model

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pychan3d Framework Update