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

被引：0
|
作者：
Abam, TKS [1 ]
机构：
[1] Rivers State Univ Sci & Technol, Inst Geosci & Space Technol, Port Harcourt, Nigeria
来源：
HYDRO-ECOLOGY: LINKING HYDROLOGY AND AQUATIC ECOLOGY | 2001年 / 266期
关键词：
Niger delta; ecology; dynamic equilibrium; dams; sediment delivery; coastal erosion; morphology; riverine; river modification; wetlands; saline intrusion;
D O I：
暂无
中图分类号：
Q14 [生态学（生物生态学）];
学科分类号：
071012 ; 0713 ;
摘要：
The Niger Delta is a 40-km(2) 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 / 29
页数：11
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