Research Activities -

Publications

1- Land subsidence dynamics in the Douala Coastland

Gergino Chounna , Philip S. J. Minderhoud, Leonard Ohenhen, Katharina Seeger, Manoochehr Shirzaei, Pietro Teatini (2026). Land subsidence dynamics and their interplay with spatial and temporal land-use transitions in the Douala coastland, Cameroon . Natural Hazards and Earth System Sciences (NHESS).

2- Global subsidence of river deltas

Ohenhen, L. O., Shirzaei, M., Davis, J. L., Tiwari, A., Nicholls, R., Dasho, O., Sadhasivam, N., Seeger, K., Werth, S., Chadwick, A. J., Onyike, F., Lucy, J., Atkins, C., Daramola, S., Ankamah, A., Minderhoud, P.S.J, Gergino Chounna (2026). The Global Threat of Sinking Deltas . Nature.

3- Strategic Material recovery

Ateh Suh N. N., Roberto R., Abdou Nasser N. M., Paula Ngo F. T., and Gergino Chounna (2024). Material recovery as a strategy for landfill remediation: a case study of Nkolfoulou landfill, Cameroon . Journal of Material Cycles and Waste Management.

4- Hydrogeochemistry of low agricultural soil yield

Wilson Y. FANTONG, Gergino Chounna , Therese L. L. Jokam NENKAM, Alain T. FOUEPE, Ernest CHI FRU4, Yaya FODOUE, Claire CARLIER, Sara VASSOLO, Yollande NKWESSE, Pierre NBENDAH, George E. NKENG, Nelly MONTCOUDIOL (2023). Hydrogeochemistry of low agricultural soil yield in Sahelian and Sub-Tropical watersheds, Northern Cameroon . Journal of African Earth Sciences 199 (2023) 104823.

5- Groundwater in the Sudano-Sahelian zone

Haman J.B. Didier, Wilson Y. Fantong, Ewodo G. Mboudou, Auguste Ombolo, Therese L.L. Nenkam Jokam, Gergino Chounna ,and Gabriel Messi, (2023) . Hydrogeochemistry and stable isotopes of groundwater in the Sudano-Sahelian zone: a case of the Mayo Bocki watershed in North Cameroon . Journal of HydroResearch 6 (2023) 36–51.

6- Groundwater Contamination & Human Health Risk

Haman J.B. Didier, Ewodo G. Mboudou, Wilson Y. Fantong, Auguste Ombolo, Gergino Chounna ,, Line Laure N. Jokam, Gabriel Messi, (2023). Potentially toxic elements contamination in groundwater and human health risk assessment in the Mayo Bocki watershed, North Cameroon. Arabian Journal of Geosciences (2023) 16:479.

7- Agricultural Water Security

Alain Fouépé Takounjou · Wylliam Foano Dandjio · Yaya Fodoué · Wilson Fantong · Mohamed Ngah · Thérèse Jokam Nenkam · Claire Carlier · Sara Vassolo · Nelly Montcoudiol · Carine Enow Tarkang Gergino Chounna . Robert Kringel, (2022). Assessment of water availability for agricultural activities in the Savanna Plateau of Adamawa, Cameroon . Environ Monit Assess (2022) 194:813.

Conference Presentations and Posters

1- Gergino Chounna, Philip Minderhoud and Pietro Teatini. Will Douala’s Coastland sink faster than sea-level rise? Investigating coastal subsidence and relative sea-level rise until 2050. WACA-VAR (West Africa Coastal Areas – Mapping Vulnerability, Adaptability and Resilience to a Changing Climate) Workshop 2025, Grand-Bassa (Cote d’Ivoire), 30th September to 02nd October 2025.

2- Gergino Chounna, Caterina Millevoi, Philip Minderhoud and Pietro Teatini. Assessing urbanization-induced land subsidence in Douala (Cameroon): A Deep Learning integration of remote sensing and soil data. Joint SIMP-SGI Congress, Padova (Italy), 16th – 18th September 2025. May 12-15, 2025, Kraków, Poland.

3- Gergino Chounna, Philip Minderhoud, Leonard Ohenhen, Katharina Seeger, Manoochehr Shirzaei, Pietro Teatini. Land Subsidence and Coastal City Vulnerability: Elevation Data Challenges in Douala Coastland, Cameroon. IAG-Urban Geomorphology-2025 Working Group Workshop: Geomorphology, geodiversity, and geosites in urban areas. May 12-15, 2025, Kraków, Poland.

4- Gergino Chounna, Philip Minderhoud, Leonard Ohenhen, Katharina Seeger, Manoochehr Shirzaei, Pietro Teatini. Land Subsidence and Coastal City Vulnerability: Elevation Data Challenges in Douala Coastland, Cameroon. West African International Workshop on Coastal Land Subsidence, 04 to 10 December 2024, in Accra (Ghana).

5- Gergino Chounna, Philip Minderhoud, Leonard Ohenhen, Manoochehr Shirzaei, Pietro Teatini. Vulnerability of coastal cities and mangroves to the combined effects of Land subsidence, relative sea-level rise, and groundwater extraction along the low-lying coastland of Cameroon. European Geological Union (EGU) 2024, Vienna (Austria), 14th-18th April 2024.

6- Gergino Chounna, Philip Minderhoud, Leonard Ohenhen, Manoochehr Shirzaei, Pietro Teatini. Estimating Land Subsidence Dynamics in Rapidly Developing Coastal Urban Environments: Case of Douala City in Cameroon. URBIS24, Frascati (Italy), 16th-18th September 2024.

7- Gergino Chounna, Philip Minderhoud, Leonard Ohenhen, Manoochehr Shirzaei, Pietro Teatini. Estimating Land Subsidence Dynamics in Rapidly Developing Coastal Urban Environments: Case of Douala City in Cameroon. AAEES Autumn Summit 2024, Online, 17th October 2024.

8- Gergino Chounna, Philip Minderhoud and Pietro Teatini. Vulnerability of Coastal Cities and Mangroves to the Combined Effects of Land Subsidence, Relative sea-level rise, and Groundwater Extraction along the low-lying coastland of Cameroon. WACA-VAR Workshop, December 04 to 08, 2023, at Douala, Cameroon.

Gergino Chounna Y.