Dr. Kunwar Mrityunjai Sharma

Dr. Kunwar Mrityunjai Sharma

Engineering Geologist, Hydrogeologist & Subsurface Scientist

Ph.D. researcher specializing in engineering geology, hydrogeology, MODFLOW-USG / USG-Transport numerical modeling, Connected Linear Networks (CLN), density-dependent flow, PFAS transport, and custom scientific Python pipelines (pychan3d) for water resources and safety assessments.

Recent Updates

What's New

USGT v2.8.0 Simulator August 2026

Hydrological flow and contaminant transport simulator

Advanced process-based simulator incorporating unstructured grids, Connected Linear Networks (CLN), PFAS precursor chain decay, Borehole Heat Exchangers (BHE), and density-dependent flow.

Launch USG Simulator
Geotechnical Simulator August 2026

Slope Stability & Critical Failure Assessor

Limit Equilibrium Method calculator evaluating Factor of Safety ($FS$), critical slip arcs, and multi-layer soil stratigraphy with 1:1 metric edge rulers.

Launch Slope Model
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Interactive Simulations

Dedicated Computational Process Models

MODFLOW-USG / USG-Transport v2.8.0 Simulator

Simulates advanced groundwater flow & transport using unstructured Control Volume Finite Difference (CVFD) grids, Connected Linear Networks (CLN), PFAS precursor chain decay, geothermal BHE loops, Richards vadose flow, and IMS adaptive matrix solvers.

Launch MODFLOW-USG Model

Slope Stability & Multi-Layer Stratigraphy Assessor

Computes Factor of Safety ($FS$) across user-defined multi-layer soil/rock profiles, cohesive-frictional layers ($c', \phi'$), pore water pressure ($r_u$), and crest surcharges with Ordinary Method of Slices.

Launch Slope Model

KBS-3 DGR Canister Spacing & Thermal Sandbox

Examines thermal decay and plume interference across KBS-3 nuclear waste canisters at -450 m depth as a function of canister/tunnel spacing ($S$), decay age, and rock thermal conductivity ($k$).

Launch Canister Spacing Model

Soil-Atmosphere Carbon & GHG Flux Model

Simulates trace gas exchanges (CO₂, CH₄, N₂O), soil temperature/moisture coupling, and land-atmosphere carbon fluxes under dynamic weather drivers.

Launch GHG Model

2D Aquifer Contaminant Plume Model

Features FDM groundwater flow solver, interactive point-source placement, extraction pumping capture zones, no-flow barrier walls, dispersion dynamics (αL, αT), and radioactive decay.

Launch Transport Model

2D Channel Network Model (CNM)

Features FDM Gauss-Seidel hydraulic solver, log-normal conductance distributions (σ), and flow-proportional 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
Career History

Research Experience

Senior Scientist
VTT Technical Research Centre of Finland | May 2023 – Dec 2025
  • Led numerical groundwater flow, MODFLOW-USG transport, and slope stability modeling in rock masses and engineered barrier caps for national safety frameworks.
  • Developed customized Python packages to convert 3D fracture networks into calculation matrices and integrated finite-element modeling 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. 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

Contact Information

Espoo, Uusimaa, Finland

Sharmamrityunjai@gmail.com