scholarly journals SEDIMENTATION STUDIES ON THE NIGER RIVER DELTA

1976 ◽  
Vol 1 (15) ◽  
pp. 125 ◽  
Author(s):  
Ramiro Mayor-Mora ◽  
Preben Mortensen ◽  
Jorgen Fredsoe
Keyword(s):  
Feasibility Studies ◽  
River Delta ◽  
Preliminary Design ◽  
Port Facilities ◽  
Navigation Channel ◽  
Niger River ◽  
Western Portion

An area of the Niger River Delta was studied from October 1974 to October 1975 in connection with feasibility studies and preliminary design for the development of a deep draught port in the Western portion of the Delta. The provision of a"100-kilometer, 8 or 10 m navigation channel through one of the entrances from the sea, up to new port facilities at Warri required comprehensive hydraulic, hydrographic and sedimentation surveys over such period.

scholarly journals THE BRANCHING CHANNEL NETWORK IN THE YANGTZE ESTUARY

2012 ◽  
Vol 1 (33) ◽  
pp. 69
Author(s):  
Zheng Bing Wang ◽  
Pingxing Ding
Keyword(s):  
Yangtze Estuary ◽  
River Delta ◽  
Sediment Supply ◽  
Channel Structure ◽  
The South ◽  
Channel Network ◽  
The Yangtze Estuary ◽  
The North ◽  
Navigation Channel ◽  
The Impact

The channels in the Yangtze Estuary have an ordered-branching structure: The estuary is first divided by the Chongming Island into the North Branch and the South Branch. Then the South Branch is divided into the North Channel and South Channel by the Islands Changxing and Hengsha. The South Channel is again divided into the North and South Passage by the Jiuduansha Shoal. This three-level bifurcation and four-outlet configuration appears to be a natural character of the estuary, also in the past (Chen et al., 1982), although the whole system has been extending into the East China Sea in the southeast direction due to the abundant sediment supply from the Yangtze River. Recently, the natural development of the system seems to be substantially disturbed by human interferences, especially the Deep Navigation Channel Project. For the understanding of the behaviour of the bifurcating channel system in the estuary we present analysis on two aspects: (1) the equilibrium configuration of river delta distributary networks, and (2) influence of tidal flow on the morphological equilibrium of rivers. Based on the analyses we conclude that the branching channel structure of the Yangtze Estuary can be classified as tide-influenced river delta distributary networks. Its basic structure is the same as in case of river dominated delta. The empirical relations describing the basic features of the river-dominated distributary delta networks can be explained by theoretical analysis, although they are not fully satisfied by the Yangtze Estuary because of the influence of the tide. Two major influences of the tide are identified, viz. increasing the resistance to the river flow into the sea and increasing the sediment transport capacity. As consequence of these two influences the cross-sectional area of the river/estuary increases in the seawards direction and the bed slope decreases. The insights from the analyses are helpful for the understanding of the impact of the Deep Navigation Channel Project on the large scale morphological development of the estuary.

scholarly journals The Dynamics of Oil and Social Movements in the Niger Delta of Nigeria

2006 ◽  
Vol 3 (1) ◽  
Author(s):  
Victor Ojakorotu
Keyword(s):  
Social Movements ◽  
Civil Society ◽  
Niger Delta ◽  
Oil Production ◽  
River Delta ◽  
Local People ◽  
Heavy Burden ◽  
Niger River ◽  
The Government

The discovery of oil in Nigeria since 1956 has inflicted a heavy burden on the local people of the Niger River Delta who have had to contend with the consequences of oil production. The grievances of these local people have persisted for more than three decades without concrete efforts on the part of the government or oil multinationals to address them. The global triumph of capitalism and the fall of communism gave the local people an opportunity to organize social movements with similar interests to international civil society to challenge the policies of successive governments and the activities of oil multinationals in the Niger Delta. This paper addresses the factors that led to a sudden upsurge in the number of social movements in the Niger Delta and how foreign NGOs have played an important role in addressing the plight of the local people of the region.

Hydrological-morphological and landscape features of the Niger River delta

2008 ◽  
Vol 35 (2) ◽  
pp. 121-136 ◽  
Author(s):  
V. I. Kravtsova ◽  
V. N. Mikhailov ◽  
A. S. Kozyukhina
Keyword(s):  
River Delta ◽  
Landscape Features ◽  
Niger River

scholarly journals Long-Term Changes in Mangrove Landscape of the Niger River Delta, Nigeria

2016 ◽  
Vol 12 (3) ◽  
pp. 248-259 ◽  
Author(s):  
Ping Wang ◽  
Aroloye O. Numbere ◽  
Gerardo R. Camilo
Keyword(s):  
River Delta ◽  
Long Term Changes ◽  
Niger River
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