Integrated Simulation of Groundwater Flow and Nitrate Transport in an Alluvial Aquifer Using MODFLOW and MT3D: Insights into Pollution Dynamics and Management Strategies DOI Open Access
Abdessalam Laoufi,

Abderrezak Boudjema,

Sabrine Guettaia

et al.

Sustainability, Journal Year: 2024, Volume and Issue: 16(23), P. 10777 - 10777

Published: Dec. 9, 2024

This study employs an integrated numerical modeling approach using MODFLOW and MT3D to simulate groundwater flow nitrate transport in the alluvial aquifer of Hennaya plain. The model was calibrated validated against observed hydraulic heads, showing excellent agreement both steady-state transient conditions, with a correlation coefficients (R2) 0.99 0.987, respectively. Meticulous calibration yielded adjusted conductivity values between 10−1 10−11 m/s, effective porosity ranging from 0.03 0.34 total varying 0.29 0.38 across aquifer. Water budget analysis revealed that aquifer’s primary recharge occurs southern side. Nitrate indicated advection is dominant process, contaminants migration predominantly occurring south north, following direction. Pollution levels were found decrease gradually distance sources, confirming agricultural activities sewage disposal as contributors contamination. Predictive scenarios over 40-year period explored various management strategies, which suggest maintaining current nitrogen input rates will lead continued increases pollution, while 50% reduction inputs could significantly improve quality. However, even substantial reductions, concentrations are not expected reach safe for drinking within simulation timeframe. underscores need immediate sustained action address pollution Plain aquifer, emphasizing importance stringent practices, particularly sector.

Language: Английский

Integrated Simulation of Groundwater Flow and Nitrate Transport in an Alluvial Aquifer Using MODFLOW and MT3D: Insights into Pollution Dynamics and Management Strategies DOI Open Access
Abdessalam Laoufi,

Abderrezak Boudjema,

Sabrine Guettaia

et al.

Sustainability, Journal Year: 2024, Volume and Issue: 16(23), P. 10777 - 10777

Published: Dec. 9, 2024

This study employs an integrated numerical modeling approach using MODFLOW and MT3D to simulate groundwater flow nitrate transport in the alluvial aquifer of Hennaya plain. The model was calibrated validated against observed hydraulic heads, showing excellent agreement both steady-state transient conditions, with a correlation coefficients (R2) 0.99 0.987, respectively. Meticulous calibration yielded adjusted conductivity values between 10−1 10−11 m/s, effective porosity ranging from 0.03 0.34 total varying 0.29 0.38 across aquifer. Water budget analysis revealed that aquifer’s primary recharge occurs southern side. Nitrate indicated advection is dominant process, contaminants migration predominantly occurring south north, following direction. Pollution levels were found decrease gradually distance sources, confirming agricultural activities sewage disposal as contributors contamination. Predictive scenarios over 40-year period explored various management strategies, which suggest maintaining current nitrogen input rates will lead continued increases pollution, while 50% reduction inputs could significantly improve quality. However, even substantial reductions, concentrations are not expected reach safe for drinking within simulation timeframe. underscores need immediate sustained action address pollution Plain aquifer, emphasizing importance stringent practices, particularly sector.

Language: Английский

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