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Reservoir Monitoring Using Satellite Altimetry: A Case Study Over Mayurakshi Reservoir
Satellite altimetry-based studies on monitoring the inland water bodies are limited in the Indian context due to small and medium size of these water bodies. The present study demonstrates the utilization of altimeters in monitoring reservoirs with a surface area <100 km2 and Altimeter data from SARAL/AltiKa and RA-2 radar altimeter of ENVISAT having similar ground track were used in this study for the period 2002–2010 and 2013–2014, respectively. This study was carried out for both monsoon and non-monsoon seasons to assess the seasonal dependence between in-situ and satellite data. Reservoir water levels obtained from ENVISAT and SARAL were compared with in-situ gauge data. The root mean square error (RMSE) between the in-situ and ENVISAT data is 0.34 with R2 of 0.97 during the monsoon season compared to the non-monsoon values of 0.70 and 0.88, RMSE and R2, respectively) Further, it was observed that the 40 Hz data of SARAL/AltiKa is in good agreement (RMSE of 0.44 m and R2 = 0.95) with in-situ data than ENVISAT 20 Hz data. Further, elevation-capacity rating curves were generated using both ENVISAT and SARAL/AltiKa observations. Overall, a 35-day time resolution of ENVISAT and SARAL/AltiKa data are insufficient for reservoir monitoring at a daily scale. However, this study has showcased the application of altimeter data in estimating the capacity of smaller water bodies.
Reservoir Monitoring Using Satellite Altimetry: A Case Study Over Mayurakshi Reservoir
Satellite altimetry-based studies on monitoring the inland water bodies are limited in the Indian context due to small and medium size of these water bodies. The present study demonstrates the utilization of altimeters in monitoring reservoirs with a surface area <100 km2 and Altimeter data from SARAL/AltiKa and RA-2 radar altimeter of ENVISAT having similar ground track were used in this study for the period 2002–2010 and 2013–2014, respectively. This study was carried out for both monsoon and non-monsoon seasons to assess the seasonal dependence between in-situ and satellite data. Reservoir water levels obtained from ENVISAT and SARAL were compared with in-situ gauge data. The root mean square error (RMSE) between the in-situ and ENVISAT data is 0.34 with R2 of 0.97 during the monsoon season compared to the non-monsoon values of 0.70 and 0.88, RMSE and R2, respectively) Further, it was observed that the 40 Hz data of SARAL/AltiKa is in good agreement (RMSE of 0.44 m and R2 = 0.95) with in-situ data than ENVISAT 20 Hz data. Further, elevation-capacity rating curves were generated using both ENVISAT and SARAL/AltiKa observations. Overall, a 35-day time resolution of ENVISAT and SARAL/AltiKa data are insufficient for reservoir monitoring at a daily scale. However, this study has showcased the application of altimeter data in estimating the capacity of smaller water bodies.
Reservoir Monitoring Using Satellite Altimetry: A Case Study Over Mayurakshi Reservoir
Water Sci.,Technol.Library
Pandey, Ashish (editor) / Chowdary, V. M. (editor) / Behera, Mukunda Dev (editor) / Singh, V. P. (editor) / Sai Krishnaveni, A. (author) / Jayaram, Chiranjivi (author) / Chowdary, V. M. (author) / Jha, C. S. (author)
Geospatial Technologies for Land and Water Resources Management ; Chapter: 18 ; 295-310
2021-12-07
16 pages
Article/Chapter (Book)
Electronic Resource
English
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