Modification of Niger Delta physical ecology: The role of dams and reservoirs

被引：0
|
作者：
Abam, T.K.S. [1 ]
机构：
[1] Inst.of Geosciences and Space Tech., Rivers State Univ.of Sci. and Tech., PMB 5080, Port Harcourt, Nigeria
来源：
IAHS-AISH Publication | 2001年 / 266期
关键词：
Dams - Floods - Reservoirs (water) - Saline water - Settling tanks;
D O I：
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学科分类号：
摘要：
The Niger Delta is a 40-km2 sedimentary basin with a complex river network and a fragile ecology in which fresh and saline water ecosystems maintain a dynamic equilibrium. Large-scale upstream impoundment in dams and reservoirs have over the years drastically reduced flow and sediment delivery to the coast resulting in adjustments to ecological boundaries, coastline geometry, lowered flood water levels and upstream migration of tidal influences. However, as the reservoirs get silted up, they no longer function as effective flow buffers, occasioning increased floods towards the pre-dam levels.
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页码：19 / 30
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