The effects of irrigation tank rejuvenation in the semi-arid region of Warangal, south India.
Abstract
Irrigation tanks have been a key source of agriculture in South India since ancient times. A considerable chunk of groundwater extraction was begun as part of the green revolution for intensive irrigation. As a result, the tanks were neglected, and storage was lowered as well. In recent years, Telangana state, India rejuvenated all small and medium irrigation tanks to restore their full capacity. Understanding of the hydrological processes that contribute water to these systems will be critical to the success of these types of programs in South Asia. As a result, the hydrological impact of rejuvenated tanks must be evaluated at both a local and watershed level. The present study focused on Warangal district rejuvenated tanks, and volume time series were extracted using Water Body Information System (WBIS) provided by Bhuvan, National Remote Sensing Centre (NRSC), India. The increase in tank volume was observed in the time series from 2017, and this was validated at a local scale by recorded piezometric levels of surrounding bore wells. The hydrological modeling was performed with and without considering tanks on a basin scale. The streamflow was reduced due to the presence of the large number of tanks in the catchment. This study found that irrigation tank rejuvenation had a positive impact on a local scale but a negative impact on a catchment scale.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2021
- Bibcode:
- 2021AGUFM.H15N1206R