Ijraset Journal For Research in Applied Science and Engineering Technology
Authors: Chavan Vaishnavi V, Patil Payal K, Fulpagare Abhijit S, Dixit Siddesh V, Prof. S. Y. Sonawane, Prof. J. P. Bhadane, Prof. D. S. Bedse, Prof. N. R. Borase
DOI Link: https://doi.org/10.22214/ijraset.2024.65712
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The effective management of municipal solid waste (MSW) landfills is vital for minimizing their environmental and public health impacts. The Hydrologic Evaluation of Landfill Performance (HELP) model and HYDRUS-1D are widely used tools for modeling landfill hydrology and leachate dynamics, respectively. This review consolidates recent advances in their application for evaluating MSW landfills. The HELP model\'s capabilities in simulating landfill hydrological behavior and HYDRUS-1D’s precision in modeling leachate transport through porous media are explored. The paper highlights the advantages, limitations, and future directions for integrating these models in landfill studies to promote sustainable waste management practices.
I. INTRODUCTION
Municipal Solid Waste (MSW) landfills are engineered systems designed for long-term waste disposal. Effective management requires understanding the hydrological and solute transport processes to mitigate environmental impacts, particularly groundwater contamination. Leachate, a liquid effluent rich in contaminants, forms as water percolates through waste. Modeling tools such as the HELP and HYDRUS-1D provide predictive capabilities for assessing landfill performance.
This section introduces the need for combined modeling approaches to holistically evaluate landfill dynamics.
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II. THE HELP MODEL
A. Overview
The Hydrologic Evaluation of Landfill Performance (HELP) model, developed by the U.S. Army Corps of Engineers, is a quasi-two-dimensional simulation tool. It divides the landfill into vertical layers and computes water balance using empirical and analytical methods. Key inputs include:
B. Applications in Landfill Studies
The HELP model's flexibility has enabled various applications:
C. Limitations
Despite its simplicity, the HELP model assumes homogeneous landfill layers, which may not reflect the complex nature of waste heterogeneity. Additionally, it does not account for solute transport, limiting its utility in contamination risk assessments.
III. HYDRUS-1D
A. Overview
HYDRUS-1D is a versatile numerical model for simulating water, solute, and heat transport in variably saturated porous media. Using a finite element approach, it solves the Richards equation for water flow and advection-dispersion equations for solute transport. Key parameters include:
B. Applications in Landfill Studies
C. Limitations
HYDRUS-1D requires detailed site-specific data, which can be difficult to obtain. Its computational demands may also be a challenge for large-scale simulations.
IV. LITERATURE REVIEW
V. INTEGRATING HELP AND HYDRUS-1D
A. Combined Approach
The integration of HELP and HYDRUS-1D combines macroscopic water balance analysis with detailed solute transport modeling. HELP provides boundary conditions such as infiltration and leachate generation rates, which serve as inputs for HYDRUS-1D.
B. Benefits of Integration
C. Challenges
VI. STRENGTHS AND LIMITATIONS
A. HELP Model
1) Strengths
2) Limitations
B. HYDRUS-1D
1) Strengths
2) Limitations
VII. FUTURE DIRECTIONS
This review highlights the potential of integrating HELP and HYDRUS-1D for evaluating MSW landfills. While HELP efficiently models hydrological processes, HYDRUS-1D adds precision in leachate migration analysis. Together, these tools provide a comprehensive framework for sustainable landfill management. However, continued advancements in model integration and site-specific data collection are essential for maximizing their utility.
[1] Schroeder, P. R., Aziz, N. M., & Lloyd, C. M. “The HELP Model: Hydrologic Evaluation of Landfill Performance”, (1994). [2] Šim?nek, J., Šejna, M., & van Genuchten, M. T., “The HYDRUS-1D Software Package for Simulating the Movement of Water, Heat, and Multiple Solutes in Variably-Saturated Media”. (2008). [3] Singh, R. K., & Prakash, V. \"Leachate Generation and Control in MSW Landfills: A Review.\" Environmental Engineering Journal. (2021). [4] K. R. Reddy, G. Kumar, R. K. Giri, Int. J. Geomech. 18 (2018) [5] L. Alibardi, R. Cossu, Leachate Generation Modeling, in Solid Waste Landfilling: concepts, processes and technologies (Elsevier, Amsterdam, 2019) [6] D. E. Daniel (Ed.), Geotechnical Practice for Waste Disposal (Chapman & Hall, London, 1993) [7] J. Šim?nek, M. Šejna, H. Saito, M. Sakai, and M. Th. van Genuchten, The HYDRUS-1D Software Package for Simulating the One-Dimensional Movement of Water, Heat, and Multiple Solutes in Variably-Saturated Media (University of California Riverside, Riverside, 2013)
Copyright © 2024 Chavan Vaishnavi V, Patil Payal K, Fulpagare Abhijit S, Dixit Siddesh V, Prof. S. Y. Sonawane, Prof. J. P. Bhadane, Prof. D. S. Bedse, Prof. N. R. Borase. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Paper Id : IJRASET65712
Publish Date : 2024-12-02
ISSN : 2321-9653
Publisher Name : IJRASET
DOI Link : Click Here