Tag: Dam

Post-landslides in Kodagu, sedimentation at Harangi dam increases by 100 times

Kodagu Connect News Network

MADIKERI: Other than causing huge loss in terms of infrastructure, property and crops, the recent floods and landslides in Kodagu have led to indirect losses that are long-term and complex. For example, these landslides have brought significant sediment load in the drainage channels and connected water reservoirs

One such impacted reservoir is the Harangi dam, which is located close to the northern affected areas near Kushalnagar. Using pre-landslides and post-landslide open source satellite images and advanced GIS image processing, WRI India generated map showing Total Suspended Solid (TSS) concentration within the Harangi reservoir has increased by almost 100 times due to flow of increased load of soil and sediment within the reservoir. It is believed such high load of soil and sediment inflow causes sedimentation within the reservoir and thereby significantly reduces the water holding capacity of the dam.

Silting is a natural hydrological and sedimentological process in which sediments flowing from the upstream catchment area get deposited in the reservoir.

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