Sediments and Soils in the Floodplain of Bangladesh: Looking up to the Himalayas?

Grosjean, Martin; Hofer, Thomas; Liechti, R; Messerli, Bruno; Weingartner, Rolf; Zumstein, S (1995). Sediments and Soils in the Floodplain of Bangladesh: Looking up to the Himalayas? In: Challenges in Mountain Resource Management in Nepal: Processes, Trends, and Dynamics in Middle Mountain Watersheds (pp. 25-32). Kathmandu: ICIMOD

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In this article, we illustrate the Himalaya-Bangladesh inleractions by using the example of sediments and sedimenl transport. Can we find the Himalayan land use degradation signal. in the floodplain of Bangladesh? What controls sedimentation in the floodplain, and where is the material coming from? First we look al the relationship between the Quaternary history, sedimentation and soils in Bangladesh, which represents the large-scale and long-term component. Then we will give two examples on lhe effects of sedimentation on soil fertility and the dynamics of erosion and accumulation processes. This represenls the short-term view (1-10 years) al the local-regional scale. Finally, we try to pul the findings into the context of the highland-lowland inleractions lo contrast the impact of natural versus anthropogenic processes. We hope to conlribute to the view that processes need to be examined at different scales in time and space, and all complexities need lo be included if we hope to gain a better underslanding of the 'real' highland-lowland interaction processes.

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