Modelling Freshwater Availability Using SWAT Model at a Catchment-Scale in Ivory Coast

Abstract

Sustainable management of Ivory Coast's freshwater reserve at a catchment scale is an essential way in the policies of land use sustainable management. Thus, the implementation of physical conceptual semi-distributed SWAT model required a good knowledge of the watershed and a large number of physic-chemical data available that have been prior adapted to Ivory Coast's climatic and soil conditions. The whole simulation span was divided into calibration set (1982)(1983)(1984)(1985)(1986) and validation set (1987)(1988)(1989)(1990). The SUFI-2 algorithm was used for parameters optimization. The sensitivity analysis focused on 8 parameters related to runoff, soil, evaporation, main channel and groundwater. The performance criteria were based on the P-factor, R-factor and the two objective functions which are Nash-Sutcliffe coefficient and the coefficient of determination. Although Taabo river basin like African basins suffers from a significant lack of data, the objective functions showed the robustness of the model to climate variability. The calibration launched during a wet period gave objective functions higher than 0.7 while validation performed in less humid period gave performance criteria around 0.6. During the simulation period, Taabo river basin daily green water ranged from 0.044 to 50.257 mm/day with a total average of 3,090.9 mm per year. As for blue water, it is ranged from 0.032 to 0.552 mm/day with an annual total average of 29.19 mm.

Sustainable Hydroelectric Dam Management in the Context of Climate Change: Case of the Taabo Dam in Côte D’Ivoire, West Africa

“…The Kossou lake formed after building the dam in 1971. The lake has a length, area, and an estimated volume of 150 km, 1855 km 2 and 28.8 × 109 m 3 , respectively, at full capacity [33,34]. The Taboo lake is 120 km downstream of the Kossou Dam, formed later in 1975 after the construction of the dam (Figure 1).…”

“…The Taboo lake is 120 km downstream of the Kossou Dam, formed later in 1975 after the construction of the dam (Figure 1). The area and stock volume of the Taabo Lake are about 69 km 2 and stocks and 630 × 106 m 3 , respectively [33][34][35]. The Taabo Dam catchment area is about 59,506.66 km 2 , in which 2975.33 km 2 (about 0.05%) is located in Mali.…”

“…The normalized risk matrix considers the impact and the probability associated with the impact normalized on a scale of 0 to 1. Thus, the risk is defined here as the product of the impact and the probability of the impact, mathematically expressed by Equation (34).…”

Analysis of the SWAT (Soil and Water Assessment Tool) Semi-distributed Model Input Data for the Hydrological Simulation of the Lobo Water Reservoir (Central West of Côte d'Ivoire)

“…In Côte d'Ivoire, SWAT has been used successfully to simulate flows and assess the impacts of climate change in the Buyo Lake watershed [13,14,15].…”

Integrating Field Experiments with Modeling to Evaluate the Freshwater Availability at Ungauged Sites: A Case Study of Pingtan Island (China)

“…The main methods are based on the principle of water balance [16], although there are no widely used evaluation models. Regional-scale assessment of soil water resources can use hydrological models, especially distributed models, to simulate the spatial and temporal distribution, which can be combined with the estimation of surface water resources and groundwater resources to evaluate the total water resource [17].…”