Despite the extensive coverage of the Niger-Benue river system through major commercial zones in Nigeria, inland water transport accounts for a minimal share of long-distance agricultural export freight compared to rail and road networks. Which of the following physical and operational factors primarily limits the year-round navigability and commercial viability of the Niger-Benue waterways?
- Severe seasonal discharge fluctuations, extensive siltation, and shifting sandbars that drastically reduce draft depth during dry months.Cevap
- BThe complete concentration of major commercial trade markets within nucleated inland settlements that lack physical access to river channels.
- CFriction from environmental push factors in coastal ports that actively deter river barges from accessing maritime export terminals.
- DA total reversal of regional transport pull factors where agricultural hinterlands strictly prioritize air freight over surface water corridors.
Cevap
Severe seasonal discharge fluctuations, extensive siltation, and shifting sandbars that drastically reduce draft depth during dry months.
The Niger-Benue river system suffers from severe hydrological limitations, including intense seasonal variation in water volume between wet and dry seasons, high rates of silt deposition creating shifting sandbars, and rapids in certain stretches. These physical barriers reduce the draft depth, rendering large sections unnavigable for heavy commercial barges during several months of the year.
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Anahtar Kavram
Hydrological Bottlenecks of Nigerian Inland Waterways