Abstract
An attempt was made to assess the sedimentation in Nanak Sagar reservoir using multi-dated Remote Sensing (RS) images. IRS LISS III and Landsat-8 (OLI) remote sensing data were taken in the year 2007 and 2015, respectively. The original capacity curve (1962) was optimized for the study of the capacity loss to various water levels. Results showed that the morphology of the reservoir has been changed significantly due to sedimentation from 1962 to 2015. The reservoir has lost a total of 2934.64 hectares (ha) by dint of sedimentation which is accounted for 59.89 % of the total water spread area during last 53 years and average deposition was computed as 1.13% per year. From the year1962 to 2007 maximum siltation deposited in Full Storage Level (FRL) of the reservoir and from 2007 to 2015 in Dead Storage Level (DRL)in the period 2007 to 2015. It can be concluded that multi-dated remote sensing images can be used as a valuable tool for the study of temporal as well as spatial changes in any large water body.
Highlights
The purpose of creating reservoirs are for irrigation, drinking water, hydropower generation, and fish production
Operational Land Imager (OLI) and Thermal Infrared Sensor (TIRS) for the year 2014-2015 of the study area were freely downloaded from the USGS Glovis website in the “GeoTIFF plus Metadata” format, all images are available in terrain corrected format
The original areas of the particular elevation during the satellite pass in a reference to the year of establishment of the reservoir were calculated from the original capacity curve using interpolation technique (Figure1)
Summary
The purpose of creating reservoirs are for irrigation, drinking water, hydropower generation, and fish production. The reservoirs in the world are subjected to sedimentation with a rate of approximately 1% per year (WCD, 2000). Remote sensing and Geographical Information Systems (GIS) can play a vital role in assessment and management of water resource for inland fisheries and aquaculture. Remote sensing and GIS are very useful when resources are remotely located Several workers such as Best and Moore (1979) and Eckhaedr and Lirke (1988) used remote sensing and GIS as tools to assess the water bodies. Nanak Sagar reservoir located in Tarai region of Ingole et al, Curr. The aim of present study is to assess the temporal geomorphological changes in Nanak Sagar for a sustainable fishery and water management. Five images of landsat-8 were processed in same software on different dates.
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