https://matjournals.net/engineering/index.php/JoEES en-US Journal of Environmental Engineering and Studies https://matjournals.net/engineering/index.php/JoEES/article/view/4041 <p><em>Agriculture is one of the largest consumers of global freshwater resources and a major contributor to water pollution through runoff containing fertilizers, pesticides, organic matter, pathogens, and heavy metals. The discharge of agricultural wastewater poses significant risks to human health and aquatic ecosystems by promoting eutrophication, groundwater contamination, and biodiversity loss. Effective management of agricultural wastewater requires an integrated approach that combines pollution prevention, sustainable management practices, and efficient treatment technologies. Management strategies such as source reduction, hydraulic segregation, containment systems, vegetative buffer strips, and wastewater reuse help minimize pollutant generation and improve water-use efficiency. In addition, treatment technologies including coagulation-flocculation, membrane filtration, adsorption, electrochemical processes, and microalgae-based systems play a vital role in removing contaminants and enabling the safe reuse of wastewater for agricultural purposes. A combination of sustainable management practices, advanced treatment technologies, and effective regulatory measures is essential for reducing environmental pollution, conserving water resources, and supporting long-term agricultural productivity and food security.</em></p> Aakankshya Pradhan Swetaleena Tripathy Copyright (c) 2026 Journal of Environmental Engineering and Studies 2026-08-25 2026-08-25 1 10 https://matjournals.net/engineering/index.php/JoEES/article/view/4284 <p><em>Accurate characterization of site-specific environmental loading is essential for realistic fatigue assessment of fixed steel jackets. This paper presents a terrain-specific methodology for transforming long-term Gulf of Guinea (GoG) metocean data into directional stress-range histories suitable for tubular-joint fatigue analysis. Ten-year wave, current, and wind records from the Okpokonam field were discretized into eight sea states (Hs = 1.0–7.5 m). This study applied a modified Morison equation incorporating a terrain influence factor, mild-slope wave transformation, and marine-growth amplification to a three-dimensional space-frame model. Rainflow counting of the resulting member stress time histories produced long-term stress-range spectra for six critical joints. Results show that moderate sea states (Hs 2.0–4.5 m) contribute 49%–56% of total fatigue damage, while severe and extreme states contribute 35%–46%. The lower-bay wave-facing K-joint (J5) experiences the highest hot-spot stress range of 68 MPa under the design sea state. The derived stress histories provide the necessary input for subsequent S–N and fracture-mechanics assessments and for system-reliability calculations. The derived occurrence-weighted stress-range histograms constitute a reusable data product that supplies the necessary loading input for the companion fatigue-criticality assessment of the same platform and for subsequent integrity-management studies of Gulf of Guinea jackets.</em></p> Wali Stanley Aleruchi Daniel Tamunodukobipi Samson Nitonye Copyright (c) 2026 Journal of Environmental Engineering and Studies 2026-10-13 2026-10-13 11 23