Demarcation of Protection Perimeters for Surface Waters of Taabo (Ivory Coast) Watershed Using Gis and Multicriteria Analysis

Abstract

The lake system of Taabo watershed contributes at 35% in the country electrification. Besides this use, water is also used in agriculture, fishing and for drinking water. The increasing human activities in its basin led to siltation of Kossou's Lake and eutrophication of 26% of Taabo's Lake total area. However, no study has yet been performed to protect or prevent this resource against pollution. This study is the first in Ivory Coast intending to delineate three protection areas around the watershed lakes. It tries firstly to define all parameters involved in the surface water intrinsic vulnerability. Their integration in multicriteria analysis coupled to use of Geographic Information System (GIS) has then used to delineate protection area around the basin lakes. Three zones were proposed: (1) the immediate protection zone, with a radius of 2000 m around the lake including water, its islands and coastal strip; (2) the near protection perimeter, limited to intense vulnerability zones in the immediate sub-basins of lake; (3) the distance protection perimeter has been estimated to the whole catchment in order to take into account diffuse pollution. As conclusion of protection perimeters elaboration, assistance must be provided for restoring quality and quantity of basin water.

Vízgazdálkodás – Ghána

“…This may also cause the conductivity of the water to rise, reduce dissolved oxygen posing danger to aquatic organisms in the water. Another source of surface water pollution is the gradual evolution of sediment (ANOH et al 2012) and this may require dredging to restore its depth. Iron ore mining in Liberia and India was found to be potential contamination of surface water and groundwater (GLEEKIA and SAHU, 2016).…”

“…They therefore proposed expansion of water quality monitoring to other sources of water and not only on pipe water. Identification of lakes vulnerability areas of pollution can help in taking immediate steps to curb the pollution (ANOH et al 2012). NARE et al (2011) suggested community participation in the monitoring and management of rivers and lakes.…”

Dynamics of Land Use in the Basin of Ancient Lagoons (Toho, Todougba, Ahouangan, Dati, Djonou) in South Benin from 1990 to 2020 and Their Current Vulnerability to Pollution

“…The vulnerability of a surface water to pollution depends on several parameters including slope, soil type, land use, runoff, density of the watershed network (Ake et al, 2020;Ake et al, 2019;Anoh et al, 2012Anoh et al, , 2018Macary et al, 2010).…”

Cartography for the Aquifer Potential Recharge Areas of the Base of the Department of Aboisso (South-East Cote d’Ivoire)

“…In fact, the setting up of priorities allows Table 2. Scale of several parameters opposite to infiltration (Haouchine et al, 2010 to synthetize our appreciations from a mathematical view in order to check their coherences (Anoh et al, 2012).…”