Norbert SILVERA

Electronic engineer, IRD

Address: Ban Naxay, Saysettha District, P.O. Box 5992, Vientiane, Laos

Phone: +856 20 54 61 74 03

Email: norbert.silvera|DONTWANTSPAM|@ird.fr

Main fields of research and expertise

Norbert Silvera is an electronics engineer of the French Institute of Research for Development (IRD), with 34 years of experience in working with agronomists, hydrologists and soils scientists. He is used to train local colleagues and students in electronics designing, testing and maintenance. He participates in publishing papers specialized on the impacts of land use changes on soil erosion and hydrology. He tooks out international patents on several original systems dealing with water level, velocity and discharge measurements. Since October 2020 he is posted at DALaM (Department of Agricultural Land Management), Vientiane, Laos. His activities aims at managing M-TROPICS/MSEC hydro-erosion and climatic database including the small catchments of Laos, Thailand and Vietnam. He also develops a new generation of water level sensors dedicated to hydrological stations of the MSEC network, and recently develops low cost acquisition systems based on ARDUINO technology.

Selected publications

Silvera N., Planchon O. “Method and device for measuring the velocity of shallow water flow”. Patent issued on 12/16/05 by the INPI (National Institute of Industrial Property, France) reference nb. FR03/11672.

Silvera N., Janeau JL, Bricquet JP “Device for the automatic sampling in a continuous flow”. Submitted on 2/8/06 at the INPI (National Institute of Industrial Property, France) with the firm Grosset-Fournier and Demachy, Paris, reference nb. 06/01104. International Application (Patent Cooperation Treaty) nb. PCT/FR2007/000092 extension filed on 01/18/07. Request for extension reference nb. PCT WO2007/090941 and Application for extension in Thailand, a non-signatory country of the PCT.

Silvera N., O. Ribolzi “Device for sampling water at the surface in a river during floods. Submitted on 10/09/06 at the INPI (National Institute of Industrial Property, France) with the firm Grosset-Fournier and Demachy, Paris, reference nb. 06/08841. International Application (Patent Cooperation Treaty) nb. PCT/FR2007/001640 extension filed on 10/09/07. Patents issued in France on 12/12/08 reference nb. FR 06 08 841, extension request reference nb.PCT WO2008/043908 and Application for extension in Thailand, a non-signatory country of the PCT, reference nb. 0701005092.

Kim M., Boithias L., Cho K.H., Silvera N., Thammahacksa C., Latsachack K.O., Rochelle-Newall E., Sengtaheuanghoung O., Pierret A., Pachepsky Y.A., Ribolzi O. Hydrological modeling of Fecal Indicator Bacteria in a tropical mountain catchment. 2017. Water Research. DOI: 10.1016/j.watres.2017.04.038.

Lacombe G., Valentin C., Sounyafong P., de Rouw A., Soulileuth B., Silvera N., Pierret A., Sengtaheuanghoung O., Ribolzi O.. Linking crop structure, throughfall, soil surface conditions, runoff and soil detachment: 10 land uses analyzed in Northern Laos. 2017. Science of the Total Environment. DOI: 10.1016/j.scitotenv.2017.10.185.

Ribolzi O., Evrard O., Huon S., De Rouw A., Silvera N., Latsachack K.O., Soulileuth B., Lefèvre I., Pierret A., Lacombe G., Sengtaheuanghoung O., Valentin C. From shifting cultivation to teak plantation: effect on overland flow and sediment yield in a montane tropical catchment. 2017. Scientific Reports. DOI: 10.1038/s41598-017-04385-2.

Robain H., Ribolzi O., de Rouw A., Silvera N., Souniaphong P., Soulileuth B., Latchasak K., Sengtaheuanghoung O., Valentin C., Gaillardet J. Long term (2006-2016) seasonal and inter-annual variability of soil electrical resistivity in a Laotian catchment of the OZCAR network. Impact of land use change, soil type and rainfall. 2017. Geophysical Research Abstracts Vol. 19, EGU.

Boithias L., Choisy M., Souliyaseng N., Jourdren M., Quet F., Buisson Y., Thammahacksa C., Silvera N., Latsachack K.O., Sengtaheuanghoung O., Pierret A., Rochelle-Newall E., Becerra S., Ribolzi O. Hydrological Regime and Water Shortage as Drivers of the Seasonal Incidence of Diarrheal Diseases in a Tropical Montane Environment. 2016. PLOS Neglected Tropical Diseases. DOI: 10.1371/journal.pntd.0005195.

Lacombe G., Ribolzi O., De Rouw A., Pierret A., Latsachak K.O., Silvera N., Dinh P.R., Orange D., Janeau J.-L., Soulileuth B., Robain H., Taccoen A., Sengphaathith P., Mouche E., Sengtaheuanghoung O., Duc T.T., Valentin C. Contradictory hydrological impacts of afforestation in the humid tropics evidenced by long-term field monitoring and simulation modelling. 2016. Hydrology and Earth System Sciences. DOI: 10.5194/hess-20-2691-2016.

Robain H., Ribolzi O., Sengtaheuanghoung O., Souniaphong P., Silvera N., Le Troquer Y. Etude de la variabilité spatiale et temporelle des sols et des flux d’eau par Tomographie de Résistivité Electrique. Poster. Réunion CRITEX, Rennes, 21-22/01/2016.

Rochelle-Newall E., Viguier M., Thammahacksa C., Silvera N., Latsachack K.O., Dinh P.R., Naporn P., Tran Sy H., Soulileuth B., Hmaimum N., Sisouvanh P., Robain H., Janeau J.-L., Pierret A., Boithias L., Ribolzi O. Effect of land use and hydrological processes on Escherichia coli loads in streams of tropical, humid headwater catchments. 2016. Scientific Reports. DOI: 10.1038/srep32974.

Lacombe G., Ribolzi O., De Rouw A., Pierret A., Latsachak K.O., Silvera N., Dinh P.R., Orange D., Janeau J.-L., Soulileuth B., Robain H., Taccoen A., Sengphaathith P., Mouche E., Sengtaheuanghoung O., Tran Duc T., Valentin C. Afforestation by natural regeneration or by tree planting: examples of opposite hydrological impacts evidenced by long-term field monitoring in the humid tropics. 2015. Hydrology and Earth System Sciences. DOI: 10.5194/hessd-12-12615-2015.

Ribolzi O., Evrard O., Huon S., Rochelle-Newall E., Henry des Tureaux T., Silvera N., Thammahacksac C., Sengtaheuanghoung O. Use of fallout radionuclides (7Be, 210Pb) to estimate resuspension of Escherichia coli from streambed sediments during floods in a tropical montane catchment. 2015. Environmental Science and Pollution Research. DOI: 10.1007/s11356-015-5595-z.

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