PhD, HDR, Soil Scientist, DR IRD

Deputy Director of the Institute of Ecology and Environmental Sciences, Paris

Deputy Director of the Research Federation on Environment of Ile de France

Member of the French Academy of Agriculture

Address: 32 av. H. Varagnat, 93143 Bondy cedex, FRANCE

Phone: +33 (0)6 43 67 87 22

Email: christian.valentin|DONTWANTSPAM|


Main fields of research and expertise

Christian Valentin, agronomist by training, PhD and HDR in soil science, gained over 40 years of experience in conducting and coordinating interdisciplinary research in ORSTOM and IRD, in soil erosion, agronomy, hydrology and ecology, mainly in West Africa and Southeast Asia. His publishing credits (h-index WoS =28) include more than 100 articles in refereed journals.


Recent publications (2014-2018)

Lacombe G., Valentin C., Sounyafong P., , de Rouw A., Soulileuth B., Silvera N., Pierret A., Sengtaheuanghoung O., Ribolzi O., in press. Linking crop structure, throughfall, soil surface conditions, runoff and soil detachment: 10 land uses analyzed in Northern Laos. Science of the Total Environment. In press.

Valentin C. (ed.), in press. Soils as a key component of the Critical Zone: Degradation and rehabilitation. ISTE ed., London, 255 p

Valentin C., in press. Soil degradation and rehabilitation. In: Soils as a key component of the Critical Zone: Degradation and rehabilitation. ISTE, London, 5-24 p.

Valentin C., in press. Soil surface crusting and water harvesting. In: Soils as a key component of the Critical Zone: Degradation and rehabilitation. ISTE, London, 25-45 p.

Valentin C., Rajot J. L., in press. Soil erosion and principles of conservation. In:Soils as a key component of the Critical Zone: Degradation and rehabilitation. ISTE, London, 46-90 p.

Ribolzi O., Evrard O., Huon S., de Rouw A., Silvera N., Latsachack K., Soulileuth B., Lefèvre, I., Pierret A., Lacombe G., Sengtaheuanghoung O., Valentin C., 2017. From shifting cultivation to teak plantation: effect on overland flow and sediment yield in a montane tropical catchment, 2017. Scientific Reports, Nature, 7: 3987.

Beaugendre N, Malam Issa O., Cerdan O., Choné, A., Desprats J.F., Rajot J.L., Sannier C., Valentin C., 2017. Developing a predictive environment-based model for mapping biological soil crusts patterns at local scale in the Sahel. Catena,158 :250-265.

Khatteli H., Ramadan Ali R., Bergametti G., Bouet C., Hachicha M., Hamdi-Aissa B., Labiadh M., Montoroi J.P., Podwojewski P., Rajot J.L., Mohamed Zaghloul A., Valentin C.. Soils and desertification in the Mediterranean region. In : Thiébault S. (ed.), Moatti J.P (ed.). The Mediterranean region under climate change : a scientific update. Marseille : IRD ; AllEnvi, 2016, p. 617-625. (Synthèses). ISBN 978-2-7099-2219-7

Lacombe, G., Ribolzi, O., de Rouw, A., Pierret, A., Latsachak, K., Silvera, N., Pham Dinh, R., Orange, D., Janeau, J.-L., Soulileuth, B., Robain, H., Taccoen, A., Sengphaathith, P., Mouche, E., Sengtaheuanghoung, O., Tran Duc, T. and Valentin, C. 2016. Contradictory hydrological impacts of afforestation in the humid tropics evidenced by long-term field monitoring and simulation modelling. Hydrology and Earth System Sciences, 20, 2691-2704,

Rochelle-Newall E.J., Ribolzi O., Viguier M., Thammahacksa C., Silvera N., Latsachack K., Dinh Rp, Naporn P., Sy H.T., Soulileuth b., Hmaimum N., Sisouvanh P., Robain H., Janeau J.-L., Valentin C., Boithias L., Pierret A., 2016. Effect of land use and hydrological processes on Escherichia coli concentrations in streams of tropical, humid headwater catchments. Scientific Reports, Nature Pub., 6:32974.

Toure A. (ed.), Bergametti G. (ed.), Bielders C. (ed.), Bouet C. (ed.), Callot Y. (ed.), Dupont S. (ed.), Khatteli H. (ed.), Labiadh M.T. (ed.), Marticorena B. (ed.), Rajot J.L. (ed.), Valentin C.(ed.). Erosion éolienne dans les régions arides et semi-arides africaines : processus physiques, métrologie et techniques de lutte. Revue des Régions Arides, 2015, 36 (1), 258 p. ISSN 0330-7956

Griffon M., Jacquet F., Lemaire E., Avelange I., Barbier M., Chevassus-au-Louis B., Hubert B., Treyer S., Valentin C., Gielen J., Fillon M., 2015. Emergence de l’agroécologie et perspectives pour le futur : les programmes ADD Systerra Agrobiosphère. Cahiers de l’ANR, 2015, 8, 50 p. [+ 198 p. sur clé USB] ISSN 2492-9565

Valentin C. (edit), 2015. Les sols. 2013-2015 Livre blanc. CNRS, Paris, 68 p.
Griffon M., Valentin C. (edit), 2015. Quelles recherches sur les sols agricoles ? ANR, Paris, 23 p.

Bertrand I., Ehrarhdt F., Alavoine G., Joulian C., Malam Issa Oumarou, Valentin Christian. Regulation of carbon and nitrogen exchange rates in biological soil crusts by intrinsic and land use factors in the Sahel area. Soil Biology and Biochemistry, 2014, 72, p. 133-144. ISSN 0038-0717

Chotte J.-L., Bernoux L., Valentin C., Dugué P., Faure G., Lifran R., 2014. Le Programme Rime-PAMPA : des SCV à l’agroécologie. Grain de Sel, 63-66 :32-33.

Janeau Jean-Louis, Gillard L.C., Grellier S., Jouquet Pascal, Le Thi Phuong Quynh, Luu Thi Nguyet Minh, Ngoc Quoc Anh, Orange Didier, Pham Dinh Rinh, Tran Duc Toan, Tran Sy Hai, Trinh Anh Duc, Valentin Christian, Rochelle Newall Emma. Soil erosion, dissolved organic carbon and nutrient losses under different land use systems in a small catchment in northern Vietnam. Agricultural Water Management, 2014, 146, p. 314-323. ISSN 0378-3774

Pham Dinh Rinh, Tran Duc Toan, Nguyen Duy Phai, Orange Didier, Janeau Jean-Louis, Valentin Christian. Nghien cuu quan ly xoi mon dat tren quy mo luu vuc : ket qua nghien cuu dal han anh huong cua thay doi su dung dat den dong chay va xoi mon dat tai luu vuc Dong cao. In : Ket qua nghien cuu khoa hoc va chuyen giao cong nghe. Quyen 6 : Ky niem 45 nam thanh lap Vien (1969-2014). Hanoï : SFRI, 2014, p. 50-58. ISBN 9786046014027

Rumpel C., Chaplot Vincent, Ciais P., Chabbi A., Bouahom B., Valentin Christian. Composition changes of eroded carbon at different spatial scales in a tropical watershed suggest enrichment of degraded material during transport. Biogeosciences, 2014, 11 (12), p. 3299-3305. ISSN 1726-4170

Valentin Christian. L’alliance pour l’environnement et sa composante “sol” : tribune. In : Varet J. (ed.) Les sols. Géosciences, 2014, 18, p. 2-3. ISSN 1772-094X