Use of Multi-Method Approach for a Gravity Irrigation Network Diagnosis: Case of Karfiguela Paddy Field in Burkina Faso

Burkina Faso is an agricultural and landlocked country whose agriculture dependent on climatic hazards. Irrigated therefore appears as alternative to secure, intensify sustainably increase production. However, irrigation systems in suffer from numerous technical, organizational, land structural problems, which strongly undermine their performance. This the case of irrigated perimeter Karfiguéla since its development 1977, has experienced insufficient water. research contributed reflection performance operation gravity networks contribution satellite images mapping perimeters. Then, approach based a hydraulic four main diagnostic methods were used: 1) networks, 2) detailed visual inspection infrastructure, 3) estimation canals’ efficiency, 4) surveys various actors involved management perimeter. These lead same results concerning state degradation functioning wet seasons. In terms results, net area 360 ha supplied by network made up supply canal, primary (4) secondary canals, 37 tertiary ones, quaternary ones for plots water supply, all ordinary concrete except are rammed soil. The efficiency canals rainy season, greater than 100%, shows that during this period functions drainage while real disorderly non-functional. damage network, siltation, grassing, erosion, overturning, large cracks many others more severe we advance toward Quaternary. Strickler roughness coefficient values order 68 feeder, 47 primary, between 32 52 secondaries 31 tertiaries also reflect high channels. Upkeep maintenance rare generally poorly executed. Improving requires complete rehabilitation reinforcement capacity operators’ works search resource complementary Comoé River support irrigation, example, exploitation alluvial aquifer unfolds under easily accessible through rudimentary wells sumps. All essential ensure sustainability rice-growing activity, concentration nearly 1200 farmers.