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Stacking of sandbags combined with the use of ground improvement technology

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UNEP-DHI Partnership, UNEP-DTU, CTCN
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To access the full technology description, please refer to the Document link above

Summary:

Sandbags are one of the most simple and used responses to containing floods. Sand-filled cloth bags are stacked to create stable structures that can hold back water and sediment flow during flooding or storm events. Sandbag barriers are temporary blockades that protect buildings and populations from inundation damage and associated economic loss. Sand bag stacking procedures can additionally be combined with simple and low cost techniques to reinforce the ground, further strengthening the defence. Reinforcement techniques usually take the form of sediments and cements that are used to create a rigid base on which the sandbags can be stacked. The bags can be created with loose flaps attached to them, so that they can be interconnected for added stability. Cheap, local fibrous materials can often be used to weave the bags, for example jute, which is found in many southern Asian countries. This technology is usually employed along roads, dikes, embankments or other areas that are prone to damage during heavy rains or flood events. The increase in the number and severity of flooding and storm events due to climate change make this technology an important adaptation response to reduce potential risks, with relatively low costs and simple implementation.

https://www.ctc-n.org/resources/climate-change-adaptation-technologies-…