FLOOD HAZARD ZONES PREDICTION USING MACHINE-LEARNING-BASED GEOSPATIAL APPROACH IN LOWER NIGER RIVER BASIN, NIGERIA

Natural Hazards Research, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

---

Optimizing nature-based solutions for urban flood risk mitigation: A multi-objective genetic algorithm approach in Gdańsk, Poland

The Science of The Total Environment, Journal Year: 2025, Volume and Issue: 963, P. 178303 - 178303

Published: Jan. 20, 2025

Language: Английский

---

Integrating Hydrological Models for Improved Flash Flood Risk Assessment and Mitigation Strategies in Northeastern Thailand

Water, Journal Year: 2025, Volume and Issue: 17(3), P. 345 - 345

Published: Jan. 26, 2025

This study focuses on assessing flash flood risks in Northeastern Thailand, particularly within the Lam Saphung, Phrom, and Chern River Basins, which are highly susceptible to floods debris flows. Using HEC-RAS hydraulic model integrated with GIS tools, research analyzes historical scenario-based events evaluate impact of land use changes hydrological dynamics. The was calibrated validated statistical metrics such as R2 values ranging from 0.745 0.994 NSE between 0.653 0.893, indicating strong agreement observed data. also identified high-risk areas, up 5.49% 5.50% increases flood-prone areas Phrom respectively, 2006 2019. Key findings highlight critical role proactive risk management targeted mitigation strategies enhancing community resilience. integration advanced modeling detailed datasets enables precise hazard mapping, including depths exceeding 1.5 m certain zones covering 105.2 km2 during severe events. These results provide actionable insights for emergency response planning. significantly contributes assessments by advancing techniques delivering practical recommendations sustainable management. outcomes relevant stakeholders, urban planners, officials, policymakers, who aim strengthen resilience vulnerable regions. By addressing complexities robust quantitative evidence, this not only enhances understanding dynamics, but lays groundwork developing adaptive mitigate adverse impacts floods, safeguarding both communities infrastructure region.

Language: Английский

---

A comprehensive review of flood monitoring and evaluation in Nigeria

International Journal of Energy and Water Resources, Journal Year: 2025, Volume and Issue: unknown

Published: April 8, 2025

Language: Английский

---

Assessing the impact of climate change on flood patterns in downstream Nigeria using machine learning and geospatial techniques (2018-2024)

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: April 18, 2025

Climate change has increased flood risks in downstream Nigeria, driven by altered hydrology, dam operations, and land-use changes threatening infrastructure, livelihoods, ecosystem stability with growing frequency severity. This study analyzes patterns, identifies key environmental drivers, predicts flood-prone areas through an integrated machine learning geospatial analysis approach. Data sources included Synthetic Aperture Radar (SAR) imagery from Sentinel-1, rainfall measurements, Shuttle Topography Mission (SRTM) elevation data, surface water level records. Machine models Random Forest (RF), Support Vector (SVM), Artificial Neural Network (ANN) were applied using tools such as Google Earth Engine ArcGIS 10.5 to assess dynamics 2018 2024. Downstream regions (elevation: 78–235.1 m) exhibited greater susceptibility than upstream (up 1399.43 m). Flood extents rose 10.9% August (from 2441.91 km² 2707.75 2024) 39.8% October 3083.44 4311.55 km²). The RF model achieved the highest accuracy (92%), outperforming SVM (88%) ANN (85%). Inundated 20–35% of zones. Rainfall intensity 15–20%, annual totals exceeding 4311 mm some areas. cover declined further exacerbating risks. findings demonstrate that climate change, alteration, operations are major contributors flooding. Mitigation strategies include 10–15% reforestation, embankment construction, learning–driven early warning systems, which can reduce damage up 30%. These approaches support sustainable risk management Nigeria.

Language: Английский

---

Long-term trends and chemometric analysis of atmospheric air quality matrices in Nigeria (2003–2023) using NASA GIOVANNI satellite data

Deleted Journal, Journal Year: 2025, Volume and Issue: 7(5)

Published: May 2, 2025

Language: Английский

---

Social dimensions of climate‐induced flooding in Jakarta (Indonesia): The role of non‐point source pollution

Water Environment Research, Journal Year: 2024, Volume and Issue: 96(9)

Published: Sept. 1, 2024

Because of its low-lying location, urbanization, and inadequate infrastructure, Jakarta (Indonesia) has experienced an increase in annual flooding events, rising from average five significant floods per year the 1990s to over 20 annually (2010-2020). With climate change exacerbating extreme weather encounters escalating risks flooding. Although recurrent is exacerbated by non-point source (NPS) pollution such as urban runoff agricultural discharge that contribute 40% total pollutants leading flood-related issues Jakarta, none investigated this research gap. To reflect novelty, work explores implications on focusing NPS analyzes their impacts social perspectives. This also underscores livelihoods, health, cohesion Jakarta. Focus group discussion with affected residents was used shed light coping strategies employed response floods, ranging community-based initiatives reliance informal networks. The empirical findings show extend beyond physical damages. Displacement communities, loss disruption essential services, increased health are among local residents. Vulnerable populations, including low-income communities residing settlements, bear consequences. Economic losses amount USD 500 million annually, impacting 1 However, recent interventions have led a 15% reduction peak flood levels 20% duration areas. Community resilience improved, 25% insurance coverage rise community initiatives. Overall, study highlights exacerbates significantly vulnerable through pollution. Addressing challenges requires integrated approaches combining effective control, resilient engagement mitigate long-term environmental impacts. PRACTITIONER POINTS: Climate-induced disproportionately affects Non-point contributes severity Waterborne diseases, reduced access clean water major concerns identified study. importance adaptation impact

Language: Английский

---

Applicability of Indigenous knowledge and methods in flood risk management in a nigerian city

Natural Hazards Research, Journal Year: 2023, Volume and Issue: 4(2), P. 239 - 245

Published: Sept. 9, 2023

The incidence of flooding is set to rise due climate impacts in the coming years. Nigeria one countries increasingly experiencing flooding. Its urban areas are expected suffer more from concentration economic activities therein and projected population growth. To sustainably manage flood risks, there a growing call incorporate indigenous knowledge practices contemporary risk management. This work engaged with experts working field management public institutions understand if methods could positively inform modern Port Harcourt, major prone Nigerian city. It finds that applicability limited given poorly managed transformation, growth, evolution city has experienced over time. However, some practice rooted Indigenous like planting certain trees mangrove species still have utility today. government encouraged halt reclamations conversions wetlands instead, seek ways restoring bringing back these important ecosystems their natural role mitigation control. Developing forests can also play an integral managing rainwater runoff while improving overall environmental quality.

Language: Английский

---

We all share the blame: Analyzing the root causes of flooding in African cities with specific reference to Harper City, Liberia

Environmental Challenges, Journal Year: 2023, Volume and Issue: 13, P. 100790 - 100790

Published: Nov. 14, 2023

Flooding is a major problem facing many cities worldwide. However, developing countries lagged behind in terms of knowledge on the causes and mechanisms to withstand mitigate ravaging effects flood disasters. Using root cause analytical lens, this study explored informal city dwellers' understanding flooding African cities. Qualitative data involving focus group discussions key informant interviews were sourced from flood-prone settlement Harper City, Liberia supported with desk review. Findings show that human factors are predominant disasters as against natural or climatic factors. Human such poor urban planning development city, drainage system, solid waste management non-enforcement laws, rules regulations guiding building codes highlighted. Considering, fact contributory can be controlled, there urgent need for planners stakeholders prioritize mitigation strategies along anthropogenic causes. The argues attainment sustainable goal 11—safe, inclusive, resilient by 2030 Africa rests robust policies focused mitigating

Language: Английский

---

Understanding the Evolving Nature of Urban Flood Risks in Sub-Saharan Africa: The Case of Kampala City, Uganda

IntechOpen eBooks, Journal Year: 2024, Volume and Issue: unknown

Published: July 10, 2024

The escalation of urban flood occurrences in Sub-Saharan African cities necessitates a nuanced comprehension evolving catalysts beyond the realms large-scale rapid urbanisation and climate change discourse. Whilst current research policy discussions primarily focus on these aspects, flooding remains persistent challenge for stakeholders. This chapter addresses this disparity by presenting precise alternative conceptual lens understanding changing triggers. Through multi-method approach involving key informant semi-structured interviews web-based surveys supported review GIS, study examines Kampala City as case study. findings highlight intricate interplay socio-economic, institutional, environmental, infrastructural factors within diverse socio-spatial contexts dynamics processes. By emphasising context-specific drivers, advocates tailored risk policies, urging authorities to move ‘one-size-fits-all’ approaches sustainable management cities.

Language: Английский

---