Why is the Zambezi River difficult to use as a trade route?

The Zambezi River is of limited economic significance as a trade route due to several persistent natural and physical barriers that impede consistent navigation.1

These challenges include:

• Natural Obstructions: The river’s course is frequently interrupted by rapids, cataracts, and waterfalls, such as Victoria Falls and the Ngonye and Chavuma falls, which prevent continuous travel.21
• Delta Conditions: At its mouth, the river splits into a wide, marshy delta that is heavily obstructed by sandbars, making access difficult.21
• Depth Constraints: Large sections of the river are shallow, restricting use to only shallow-draft steamers.1
• Infrastructure: While the river features navigable stretches, these are often separated by dams, such as the Kariba Dam and the Cahora Bassa Dam, which create further breaks in the waterway.1

Because of these combined factors, the river cannot support a continuous, efficient trade route across its entire length.1