Author(s) :

Fiston Kayembe Kayembe, Abdelhadi Ammari , Génie-Spirou Kiala Lutonadio, Patty Mayo Aluda, Landry Nzamipiele Nkaba, Yves Aseke Lukuke, Jean Shikayi Kalume, Pascal Masawula Kazwenga, Raphael Muamba Tshimanga.

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Abstract :

The aim of this study is to optimise the engineering of irrigation systems in the N'djili River watershed in order to increase rice productivity and farmers' incomes. A holistic approach was adopted, incorporating surveys to evaluate farmers' perceptions, analysis of hydro-climatic indices, soil data collection, water quality analysis and hydraulic modelling of the rice-growing area. The Masina Rail 1 rice perimeter has the potential to increase rice production, but rice farmers are currently restricted to growing rice during the rainy season. Irrigated rice cultivation takes place from mid-September to January and from March to mid-June, highlighting the high dependence of production on rainfall. Production trends show low annual growth, limited to yields during the rainy season. The lack of effective irrigation systems during the dry season represents untapped potential for increased yields. Water requirements for cultivation vary, being highest in May. An average flow of 22.3 m³/s would be sufficient to meet these requirements, even during the dry season. Analyses of irrigation water quality comply with USDA and FAO standards and pose no risk to crops. The development plan requires the upgrading of the dilapidated irrigation infrastructure. Hydraulic model simulations show that optimal water velocities range from 0.65 m/s to 1.46 m/s, with pipe pressures varying from 1.07 m.c.e. to 21.51 m.c.e.

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