Failure of inland valleys development : a hydrological diagnosis of the Bankandi valley in Burkina Faso Yira, Y. Bossa, Y.A. Keita, A. Fusillier, J.L. /Serpantié, Georges Yaméogo, B. T. Idrissou, M. Lidon, B. Several developed inland valleys for rice production were abandoned due to poor design or implementation. The Bankandi inland valley (BIV) is a contour bunds system developed in 2006 by a development project, currently experiencing a sys-tematic waterlogging. This study assessed: (1) the waterlogging vs. changing hydro-climatic conditions relationship; (2) the hydrological design and implementation of water control infrastructures; and (3) how digital elevation models (DEMs) data could be used for inland valleys development. To investigate the waterlogging vs. changing hydro-climatic conditions (precipitation and discharge), the conceptual HBV model was applied; coupled with break and trend detections tests. To evaluate the accuracy of the location of drainage flume and contour bunds, a topographic survey using a D-GPS was per-formed. To explore free DEMs as support tool in the development of inland valley, the Shuttle Radar Topography Mission 1 and the Advanced Spaceborne Thermal Emission and Reflection Radiometer 1, were used. The results show that: (1) the waterlogging was not related to changing environmental conditions; (2) major flaws including bunds not implemented on contour lines contribute to the waterlogging; (3) free DEMs were not accurate enough for valley development. The overall diagnostic of BIV entails conducting basic hydrological investigations prior to implementation. 2019 text https://www.documentation.ird.fr/hor/fdi:010076896 fdi:010076896 Yira Y., Bossa Y.A., Keita A., Fusillier J.L., Serpantié Georges, Yaméogo B. T., Idrissou M., Lidon B.. Failure of inland valleys development : a hydrological diagnosis of the Bankandi valley in Burkina Faso. 2019, 5 (4), 1733-1741 EN BURKINA FASO