Application of geospatial technique and hydrological modelling in evaluating reservoir sedimentation in Chhattisgarh state of India
Article
Soni, S, Dewangan, CL, Ahmad, I et al. (2023). Application of geospatial technique and hydrological modelling in evaluating reservoir sedimentation in Chhattisgarh state of India
. 29(sup1), 419-433. 10.1080/09715010.2023.2236985
Soni, S, Dewangan, CL, Ahmad, I et al. (2023). Application of geospatial technique and hydrological modelling in evaluating reservoir sedimentation in Chhattisgarh state of India
. 29(sup1), 419-433. 10.1080/09715010.2023.2236985
Soil erosion and sediment deposition in the reservoirs are both consequences of the change in precipitation pattern that has been observed over the past decade. For the purpose of storing water in reservoirs built before the 1980s, the Indian state of Chhattisgarh has a few irrigation projects. As the state has grown, agricultural land has increased while the proportion of forest area has decreased. Due to this development, runoff is introducing more sediment into the reservoirs, resulting in a reduction in intended storage. The effects of sediment deposition in the Kodar reservoir, located in the Mahasamund district of Chhattisgarh State, are evaluated in present study. Prior to five years, the reservoir reported a 30% deficit in actual irrigation. To quantify the sediment load, Remote Sensing (RS), Geographic Information System (GIS), and the Hydrologic Engineering Centre–Hydrologic Modelling System (HEC-HMS) were effectively employed. From 2012 to 2014, the reservoir received an average sediment load of 1.11 million tonnes. In order to preserve soil in the watershed’s erosion-prone area, a treatment plan is developed. It includes numerous thematic maps that are overlaid in order to provide preventive measures against reservoir sedimentation and is further proposed in the form of best management practices.
