The Centre-West region is one of Burkina Faso’s thirteen regions. This region is immersed in two climatic zones: the Sahel-Sudanian zone, which covers the vast majority of the region, and the Sudanian zone further south. Long-term climate studies are a key indicator that not only help us understand current and future changes in the region’s climate, but also enable better planning of agricultural activities for better resource management and production optimization. This article therefore aims to decipher the region’s rainfall projections over a century and understand their implications for irrigated agriculture at different levels.

This study analyzes the environmental impacts of ecological BCERs on local ecosystems, their socio-economic impacts both in terms of improving income and food and nutritional security. It was conducted on the basis of surveys carried out with thirty (30) producers benefiting from said BCERs, including two (02) women. The Kobotoolbox mobile application was used for data collection. The data collected was exported to EXCEL software for processing and analysis. The analysis of the survey data made it possible to identify enormous trends in positive impacts linked to the main impacts studied. On the environmental level, respondents are unanimous on the fact that BECRs improve soil fertility, 97% believe that they allow better resilience to climate variability. The increase in productivity and income by more than 50% as well as the securing of production as affirmed by 100% of respondents, are some results recorded on the socio-economic level. The second important point concerns a case study which made it possible to develop an operating account of a respondent, illustrating the financial profitability of the ecological BCER. This forecast operating account reveals that from the third year, the cash flow (2,387,835 FCFA) largely covers the investment cost of the BCER which is estimated at 1,800,000 CFA francs. Some negative effects were noted in particular on the social level. They are linked to the risks of drowning of children that could be caused by the installation of the BECR. In light of the results, a proposal for improvement was made to the administrative authorities and their partners involved in the BCER issue. This, in order to deepen the analysis of this theme in terms of securing BECR structures, their economic and ecological profitability for a better approach to the subject.

Economic activities in the Central West region of Burkina are dominated by agriculture. This agriculture, dependent on climatic parameters (rainfall, temperature), is under the influence of climate change. Understanding the state of the climate and its evolution can guide effective adaptation measures. This article aims to contribute to knowledge of the state of the climate, its variabilities and trends in the Central West region of Burkina Faso. The results of the analyzes indicate that the region is characterized by a tropical climate subdivided into two types. The North Sudanian type characterizes the northern part and the South Sudanian type the southern part. There is strong variability in rainfall and temperatures from 1991 to 2020. This variability is marked by a relatively dry period (1988-2002) characterized by an average rainfall of 705.95 mm and nine years of rainfall deficit, the excesses of which are recorded in 1997, 2000 and 2005. The second period (2003-2017), wetter, is characterized by an average of 828.58 mm, with ten years of excess rainfall. The year 2012 recorded very excess rainfall. Temperatures have fluctuated with an average for the same period of 29.11°C. High temperature values ​​are observed in 2020 and 2005 with 29.60°C and 29.55°C respectively. The low averages were recorded in 1992 and 1991 with 28.04°C and 28.41°C respectively. The analyzes conclude a trend towards a slight increase in precipitation and a regular and significant trend towards an increase in temperatures.