Civil and Structural Engineering, Water Science and Technology, Waste Management and Disposal, Oceanography
32
Scopus Publications
157
Scholar Citations
7
Scholar h-index
4
Scholar i10-index
Scopus Publications
Evaluating Surface Water-Groundwater Interactions and Water Quality in the Indravati River Basin Using Conceptual and MCDM Models Venkateswarlu Challa, Manjula Renganathan Journal of Water Resources Planning and Management, 2026 Water resources worldwide are increasingly stressed due to population growth, urban expansion, climate change, and land use changes. Fertilizers, irrigation runoff, wastewater, and industrial pollution notably impact the Indravati River basin in India. This study addressed the critical gap in previous research by developing a hydrological and water quality model using QSWAT and performing uncertainty analysis through global sensitivity analysis (GSA). GSA, conducted using the SWAT-CUP with the SUFI-2 algorithm, identified key sensitive parameters, including Manning’s n for the main channel, soil water capacity, and curve number for moisture condition II. Model validation indicated strong performance, with R2 values ranging from 0.78 to 0.84 and NSE values between 0.77 and 0.81, demonstrating good alignment with observed streamflow and water quality data. QSWATMOD was subsequently applied to assess the surface water-groundwater (SW-GW) conditions by addressing the limitations of the previous research. Additionally, twenty-five subwatersheds were prioritized using novel SWAT-integrated multicriteria decision-making (MCDM) ensemble techniques, including SWAT–BayBWM-FuzVIKOR, SWAT-VIKOR, and SWAT-SAW, based on water quality criteria. The hybrid SWAT–BayBWM-FuzVIKOR model outperformed the other methods based on the proportion of changes (PoCs) and severity of changes (SoCs), demonstrating superior capability in capturing the complex, nonlinear dynamics of the basin. These findings in this research provide valuable insights for guiding targeted conservation and remediation efforts across any river basin under study.
Experimental study on lateral behaviour of piles on sloping ground subjected to combined active and passive loads Jegatheeswaran Boompandi, Kasinathan Muthukkumaran, Manjula R International Journal of Geotechnical Engineering, 2026 Pile foundations often experience lateral loads from environmental forces, nearby construction, or ground movements, particularly in sloping or seismic-prone areas. This study experimentally examines the lateral response of a single pile embedded in dry cohesionless soil under combined active and passive loading conditions. Active loads were applied at the pile head in both forward (downslope) and reverse (upslope) directions, while passive loads were induced by a surcharge placed at twice the depth of fixity (2×Lf) behind the pile. Tests were performed on horizontal ground and slopes of 1 V:2 H and 1 V:1.5 H. Results show that reverse loading yields higher resistance, whereas sloping ground reduces passive resistance and increases initial displacement. Bending moment profiles and head displacements were recorded and analysed. Regression models were developed to predict deflection, and maximum moment, offering valuable insights for designing pile foundations in complex loading and terrain conditions.
A study on groundwater quality and its characteristics in Tuticorin coastal region using geo-statistical approaches, Tamil Nadu, India Indian Journal of Geo Marine Sciences, 2021
Wave attenuation by coastal heterospecific vegetation-modeling of synthetic plant meadows by Response Surface Methodology (RSM) Indian Journal of Geo Marine Sciences, 2021
Assessment of saline water intrusion using geospatial techniques along the tuticorin coast of Tamil Nadu Indian Journal of Environmental Protection, 2019
Deflection of slender cylindrical member under breaking wave impact Proceedings of the International Offshore and Polar Engineering Conference, 2012
RECENT SCHOLAR PUBLICATIONS
Enhancing daily streamflow prediction: A comparative analysis of univariate LSTM and N-BEATS models with coupled SWAT-LSTM and SWAT-N-BEATS models incorporating influential … RY Priya, R Manjula Journal of Earth System Science 134 (2), 112 , 2025 2025 Citations: 6
and the Assessment of Nutrient Loadings C Venkateswarlu, R Manjula, P Yuvaraja, S Hemavathi Developments and Applications of Geomatics: Proceedings of DEVA 2022, 467 , 2024 2024
Lateral Response of Pile Under Passive Loading Conditions in Horizontal and Sloped Grounds J Boompandi, K Muthukkumaran, R Manjula Indian Geotechnical Journal 54 (1), 134-153 , 2024 2024 Citations: 2
Univariate streamflow forecasting using deep learning networks RY Priya, R Manjula International Journal of Hydrology Science and Technology 17 (2), 198-219 , 2024 2024 Citations: 2
Simulation and Forecasting of Groundwater Levels of Gadilam River Basin of India Using Artificial Intelligence Techniques C Venkateswarlu, R Manjula International Conference on Hydraulics, Water Resources and Coastal … , 2023 2023
Enhanced streamflow prediction using SWAT’s influential parameters: a comparative analysis of PCA-MLR and XGBoost models R Manjula Earth Science Informatics 16 (4), 4053-4076 , 2023 2023 Citations: 8
A Comparative Analysis of Ensemble MLP, ANFIS and CART Models with Wavelet Transform in Daily Streamflow Prediction of Lower Godavari River Basin of India V Challa, R Manjula AGU Fall Meeting Abstracts 2023, H19-06 , 2023 2023
Coherent Population Trapping Based Atomic Sensors for Space Application K Rajaiah, P Tiwari, R Manjula, N Thakur, MJ Kappen, SB Umesh, ... Advances in Small Satellite Technologies: Proceedings of National Conference … , 2023 2023 Citations: 1
Assessment of Water Quality in Indravati Sub-basin Using Arcswat P Yuvaraja, R Manjula, C Venkateswarlu International Association for Hydraulic Environmental Engineering and … , 2022 2022
Simulation of streamflow and the assessment of nutrient loadings for the indravati river basin of India using SWAT C Venkateswarlu, R Manjula, P Yuvaraja, S Hemavathi International Virtual Conference on Developments and Applications of … , 2022 2022 Citations: 1
Parametric Study of CPT Resonance in Rubidium Vapor Cell for Application in Atomic Clock R Kaitha, R Manjula, P Tiwari, MJ Kappen, S Biswas, B Raha, S Pradhan, ... Indian Journal of Pure & Applied Physics (IJPAP) 60 (6) , 2022 2022
Behavior of pile in sloped grounds under the influence of surcharge loads J Boompandi, K Muthukkumaran, R Manjula Indian Geotechnical Conference, 165-175 , 2021 2021 Citations: 2
A review for comparing SWAT and SWAT coupled models and its applications RY Priya, R Manjula Materials Today: Proceedings 45, 7190-7194 , 2021 2021 Citations: 35
A study on groundwater quality and its characteristics in tuticorin coastal region using geo-statistical approaches, Tamil Nadu, India. G Sakthivel, R Manjula 2021
Wave attenuation by coastal heterospecific vegetation-modeling of synthetic plant meadows by Response Surface Methodology (RSM) S Hemavathi, R Manjula Indian Journal of Geo-Marine Sciences (IJMS) 50 (03), 193-202 , 2021 2021 Citations: 1
Reduction of wave energy due to monotypic coastal vegetation using response surface methodology (RSM) S Hemavathi, R Manjula Nature Environment and Pollution Technology 19 (5), 1965-1971 , 2020 2020 Citations: 2
Wave attenuation by heterospecific coastal vegetation–modelling through response surface methodology on synthetic plant meadows S Hemavathi, R Manjula Current Science 119 (3), 497-506 , 2020 2020 Citations: 4
Wave attenuation by coastal vegetation–An Empirical study on synthetic models S Hemavathi, R Manjula IJMS 49, 1143-1152 , 2020 2020 Citations: 1
A comparative study of empirical models for the analysis of wave attenuation by two different coastal plant meadows-A synthetic model lab study S Hemavathi, R Manjula, S Thiru 2020 Citations: 4
Study Of Two Synthetic Models Of Aquatic Meadow Vegetation To Analyse Wave Dissipation From A Laboratory Flume S Hemavathi, R Manjula International Journal of Grid and Distributed Computing 13 (1), 1528-1535 , 2020 2020
MOST CITED SCHOLAR PUBLICATIONS
A review for comparing SWAT and SWAT coupled models and its applications RY Priya, R Manjula Materials Today: Proceedings 45, 7190-7194 , 2021 2021 Citations: 35
Geomorphology based semi-distributed approach for modeling rainfall-runoff modeling using GIS S Saravanan, R Manjula Aquatic Procedia 4, 908-916 , 2015 2015 Citations: 33
Response of a slender cylindrical member under breaking wave impact R Manjula, SA Sannasiraj Journal of Hydrodynamics 31 (2), 345-357 , 2019 2019 Citations: 14
Laboratory measurements of breaking wave impact pressures on a slender cylindrical member R Manjula, SA Sannasiraj, K Palanichamy The International Journal of Ocean and Climate Systems 4 (3), 151-169 , 2013 2013 Citations: 11
Effects of treated wastewater irrigation on soil properties–A case study at NIT Trichy R Antony, S Saravanan, R Manjula International Journal of Earth Sciences and Engineering 9 (6), 2041-2047 , 2016 2016 Citations: 9
Enhanced streamflow prediction using SWAT’s influential parameters: a comparative analysis of PCA-MLR and XGBoost models R Manjula Earth Science Informatics 16 (4), 4053-4076 , 2023 2023 Citations: 8
Experimental Investigations of acceleration on slender cylindrical member under breaking waves R Manjula, SA Sannasiraj, K Palanichamy The International Journal of Ocean and Climate Systems 5 (3), 117-125 , 2014 2014 Citations: 8
Experimental investigation of response of vertical slender cylinder under breaking wave impact R Manjula, SA Sannasiraj, S Saravanan Aquatic Procedia 4, 227-233 , 2015 2015 Citations: 7
Enhancing daily streamflow prediction: A comparative analysis of univariate LSTM and N-BEATS models with coupled SWAT-LSTM and SWAT-N-BEATS models incorporating influential … RY Priya, R Manjula Journal of Earth System Science 134 (2), 112 , 2025 2025 Citations: 6
Wave attenuation by heterospecific coastal vegetation–modelling through response surface methodology on synthetic plant meadows S Hemavathi, R Manjula Current Science 119 (3), 497-506 , 2020 2020 Citations: 4
A comparative study of empirical models for the analysis of wave attenuation by two different coastal plant meadows-A synthetic model lab study S Hemavathi, R Manjula, S Thiru 2020 Citations: 4
Numerical modeling for wave attenuation by coastal vegetation using flow-3d S Hemavathi, R Manjula International Journal of Recent Techonology and Engineering (IJRTE) 7, 65 , 2019 2019 Citations: 3
Lateral Response of Pile Under Passive Loading Conditions in Horizontal and Sloped Grounds J Boompandi, K Muthukkumaran, R Manjula Indian Geotechnical Journal 54 (1), 134-153 , 2024 2024 Citations: 2
Univariate streamflow forecasting using deep learning networks RY Priya, R Manjula International Journal of Hydrology Science and Technology 17 (2), 198-219 , 2024 2024 Citations: 2
Behavior of pile in sloped grounds under the influence of surcharge loads J Boompandi, K Muthukkumaran, R Manjula Indian Geotechnical Conference, 165-175 , 2021 2021 Citations: 2
Reduction of wave energy due to monotypic coastal vegetation using response surface methodology (RSM) S Hemavathi, R Manjula Nature Environment and Pollution Technology 19 (5), 1965-1971 , 2020 2020 Citations: 2
Coherent Population Trapping Based Atomic Sensors for Space Application K Rajaiah, P Tiwari, R Manjula, N Thakur, MJ Kappen, SB Umesh, ... Advances in Small Satellite Technologies: Proceedings of National Conference … , 2023 2023 Citations: 1
Simulation of streamflow and the assessment of nutrient loadings for the indravati river basin of India using SWAT C Venkateswarlu, R Manjula, P Yuvaraja, S Hemavathi International Virtual Conference on Developments and Applications of … , 2022 2022 Citations: 1
Wave attenuation by coastal heterospecific vegetation-modeling of synthetic plant meadows by Response Surface Methodology (RSM) S Hemavathi, R Manjula Indian Journal of Geo-Marine Sciences (IJMS) 50 (03), 193-202 , 2021 2021 Citations: 1
Wave attenuation by coastal vegetation–An Empirical study on synthetic models S Hemavathi, R Manjula IJMS 49, 1143-1152 , 2020 2020 Citations: 1
