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Water insufficiency in the irrigation canals during the dry season in the rice-growing plain of Bama means that barely 20% of the plots is cultivated with rice during this period, causing losses of over 1,500,000. US $ per year. So, groundwater is used as an alternative by some producers without control. This study aims to assess the current use of groundwater for off-season production in blocks 5 and 7 of the Bama plain. The diagnosis was made during the 2019 dry season by means of focus group, then an individual survey in order to inventory the sinks and speculations produced. Then, around twenty large-diameter rice irrigation wells were followed to determine the volumes of water supplied. The results showed that, the small wells are mainly intended for manual irrigation of market gardening during the cold dry season and large-diameter wells for pumping rice cultivation in the hot dry season. Finally, over-irrigation of more than 2.5% of rice needs was observed.

Status of the Use of Groundwater during the Dry Season at 5 and 7 Blocks of the Irrigated Rice Plain of Bama, Burkina Faso