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1 Yira, Y.; Diekkruger, B.; Steup, G.; Bossa, A. Y. 2016. Modeling land use change impacts on water resources in a tropical West African catchment (Dano, Burkina Faso). Journal of Hydrology, 537:187-199. [doi: https://doi.org/10.1016/j.jhydrol.2016.03.052]
Land use ; Land cover change ; Water resources ; Hydrology ; Models ; Water balance ; Groundwater ; Water levels ; Flow discharge ; Catchment areas ; Soil moisture ; Evapotranspiration ; Farmland ; Savannas ; Tropical zones ; Maps / West Africa / Burkina Faso / Dano
(Location: IWMI HQ Call no: e-copy only Record No: H047556)
(0.85 MB)
This study investigates the impacts of land use change on water resources in the Dano catchment, Burkina Faso, using a physically based hydrological simulation model and land use scenarios. Land use dynamic in the catchment was assessed through the analysis of four land use maps corresponding to the land use status in 1990, 2000, 2007, and 2013. A reclassification procedure levels out differences between the classification schemes of the four maps. The land use maps were used to build five land use scenarios corresponding to different levels of land use change in the catchment. Water balance was simulated by applying the Water flow and balance Simulation Model (WaSiM) using observed discharge, soil moisture, and groundwater level for model calibration and validation. Model statistical quality measures (R2 , NSE and KGE) achieved during calibration and validation ranged between 0.6 and 0.9 for total discharge, soil moisture, and groundwater level, indicating a good agreement between observed and simulated variables. After a successful multivariate validation the model was applied to the land use scenarios. The land use assessment exhibited a decrease of savannah at an annual rate of 2% since 1990. Conversely, cropland and urban areas have increased. Since urban areas occupy only 3% of the catchment it can be assumed that savannah was mainly converted to cropland. The conversion rate of savannah was lower than the annual population growth of 3%. A clear increase in total discharge (+17%) and decrease in evapotranspiration ( 5%) was observed following land use change in the catchment. A strong relationship was established between savannah degradation, cropland expansion, discharge increase and reduction of evapotranspiration. The increase in total discharge is related to high peak flow, suggesting (i) an increase in water resources that are not available for plant growth and human consumption and (ii) an alteration of flood risk for both the population within and downstream of the catchment.
2 Houessionon, P.; Fonta, W. M.; Bossa, A. Y.; Sanfo, S.; Thiombiano, N.; Zahonogo, P.; Yameogo, T. B.; Balana, Bedru. 2017. Economic valuation of ecosystem services from small-scale agricultural management interventions in Burkina Faso: a discrete choice experiment approach. Sustainability, 9(9):1-16. [doi: https://doi.org/10.3390/su9091672]
Ecosystem services ; Economic value ; Sustainable agriculture ; Small scale farming ; Water management ; Resource recovery ; Wastewater ; Water reuse ; Drip irrigation ; Organic matter ; Climate change ; Farmers attitudes ; Willingness to pay ; Estimation ; Models ; Welfare / Burkina Faso / Ouagadougou / Dano
(Location: IWMI HQ Call no: e-copy only Record No: H048370)
(0.74 MB) (768 KB)
The main purpose of this paper is to estimate farmers’ preferences and their willingness to pay (WTP) for ecosystem services derived from four agricultural water management (AWM) and resource recovery and reuse (RRR) intervention options in Burkina Faso, using a choice experiment (CE). These include; small water infrastructure, drip irrigation, recovery of organic matter from waste, and treated wastewater. The design decisions relating to attribute selection, the level of attributes, alternatives and choice tasks were guided by literature, field visits, focus group discussions, expert input and an iterative process of the STATA software to generate an orthogonal main-effects CE design. The data used was generated from a random sample of 300 farm households in the Dano and Ouagadougou municipalities in Burkina Faso. Results from conditional logit, latent class logit and mixt logit models show that farmers have positive and significant preferences for drip irrigation, treated wastewater, and organic matter. However, they are WTP on average more for drip irrigation and organic matter for agricultural sustainability. In line with economic theory, the cost of an intervention reduces demand for a given intervention. These findings can provide policy makers with evidence for agricultural policy design to build farmers’ resilience in the Sahel.
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