Impact of dam construction on the hydrological regime and quality of a Sahelian lake in the River Senegal basin

Water Quality Characteristics and Integrated Assessment Based on Multistep Correlation Analysis in the Danjiangkou Reservoir, China

“…A similar result has also been observed downstream of the nearby Three Gorges Dam (Müller et al, 2008). This result is probably due to the long water retention time for nutrients in the reservoir (Cogels et al, 1997;Soares et al, 2008). A change of hydraulic regime may cause alteration of nutrient availability and further change of the structure of the aquatic ecosystem in the Reservoir, for example the conversion from lotic benthos to lentic organisms (Baxter, 1977;Stevenson et al, 1996;Cogels et al, 1997;Wei et al, 2009;).…”

“…This result is probably due to the long water retention time for nutrients in the reservoir (Cogels et al, 1997;Soares et al, 2008). A change of hydraulic regime may cause alteration of nutrient availability and further change of the structure of the aquatic ecosystem in the Reservoir, for example the conversion from lotic benthos to lentic organisms (Baxter, 1977;Stevenson et al, 1996;Cogels et al, 1997;Wei et al, 2009;). The natural hydraulic regime has been altered by the dam construction and impoundments, consequently, some features of lakes, e.g.…”

Feasibility Analysis of MERIS as a Tool for Monitoring Lake Guiers (Senegal) Water Quality

“…[20] and [21] found that the new hydrological conditions generated by the regulating dams (viz., the stabilization of the lake stage at fairly constant elevation of 2 m above mean sea level (see Figure 2) and, hence, the permanent softening of the lake water quality) are ecological factors that encouraged the expansion of an important aquatic vegetation of free floating and fixed macrophyte (essentially Typha, Phragmites, Pistia stratiotes, Echinochloa and Nymphea). According to [22], this proliferation of aquatic plants best explains the rapid spread of schistosomiasis, the larval forms of parasitic blood flukes that currently affect the health of populations living in lakeside villages. Lake Guiers' main uses are domestic, agricultural, industrial water supply and fisheries.…”

A blooming business : Identifying limits to Lake Taihu's nutrient input

“…A comparison with the model outcomes indicate that 8 lakes might have alternative stable states (Table 2.1) including Lake Apopka (USA) where literature previously presumed alternative stable states as well (Bachmann et al, 1999;Lowe et al, 2001). The majority of the other lakes that are indicated by the model to potentially have alternative stable states are reported to support macrophytes, which in some lakes became too excessive, resulting in problems with boating access and flooding as in Lake Guiers (Senegal) (Cogels et al, 1997;Hellsten et al, 1999) and Loktak (India) (Singh et al, 2011). Other lakes are largely turbid such as the Boraphed Reservoir in Thailand (Mizuno et al, 1970).…”

“…Here the lake is shallow. The rest of the lake is turbid (Mizuno et al, 1970 (Cogels et al, 1997;Hellsten et al, 1999;Thiam et al, 2013 (Lock, 1973). (Carrick et al, 1994;Havens et al, 2005;Rodusky et al, 2013 3 -Around 42% of the lake used to be covered by macrophytes, mainly in the south of the lake growing at sheltered and shallow conditions (Torres A et al, 1989;Torres, 1993).…”