1. Pollution of aquatic ecosystems due to opium alkaloids and related pharmaceutical products: An overview 2. Pharmaceutical, and antibiotics waste in the river ecosystem 3. Heavy metal contamination in the river ecosystem of theme 4. Factors influencing the alteration of microbial and heavy metals characteristics of River systems in the Niger Delta region of Nigeria 5. Impact of climate change on the river ecosystem 6. Geomorphologic concepts and application of remote sensing and GIS for the conservation of the river ecosystem 7. Chemical and isotopic variability of the upper Ganga river, Uttarakhand, India 8. Occurrence and distribution of perfluoroalkyl acids in rivers: Impact and Risk Assessment 9. Socio-economic effects of water pollution in a River: A case study 10. Sources of ions in the river ecosystem 11. Nutrients conatamination and eutrophication in river ecosystem 12. Current status of available techniques for removal of heavy metal contamination in the river ecosystem 13. River Biodiversity, Potential Threat, And Conservational Challenges 14. Alteration of river ecosystems: in the light of nematode community structure 15. Human-Induced Stresses on the Rivers beyond their Assimilation and Regeneration Capacity 16. Ecological Engineering Approaches for Riparian Ecosystems' 17. Integrated River Basin Management and Future Prospectus 18. Engineer Substantiation Of Estimated Characteristics Of Maximum Rivers' Runoff During Floods Under Climate Change 19. Palaeoclimatic imprint on fluvial sediments: case studies from Indian Phanerozoic successions 20. Sustainability assessment of Jumar river in Ranchi district of Jharkhand using River Sustainability Bayesian Network (RSBN) model approach 21. Prospects of microbes in mitigations of environmental degradation in the river ecosystem 22. Sustainable fisheries/Aquaculture of Hilsa, Tenualosa ilisha in changing and dynamic riverine ecosystem of India and its neighborhood 23. Water Quality Status in Bagmati River of Kathmandu Valley, Nepal