Simulation of groundwater recharge from direct seeded and transplanted rice fields

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dc.contributor.advisorSatpute, Sanjay
dc.contributor.authorGulati, Dinesh
dc.date.accessioned2021-10-26T09:26:07Z
dc.date.available2021-10-26T09:26:07Z
dc.date.issued2021
dc.description.abstractA field study was conducted for assessment of potential groundwater recharge in direct seeded and transplanted rice fields at Research farm of Department of Agronomy, Punjab Agricultural University, Ludhiana using soil water balance method and simulation with HYDRUS-1D. The soil of the research farm belongs to alluvial sandy loam in texture and climate of region is semi-arid with average annual rainfall of 598.9 mm. Two treatments viz direct seeded (DSR) and transplanted rice (TPR) with three replications each were sown/transplanted during kharif season of year 2019. The irrigation amount of 1200 and 1100 mm was applied in TPR and DSR, respectively during crop period. The deep percolation from the rice fields was determined and predicted in order to assess potential groundwater recharge from both treatments. The daily crop evapotranspiration was estimated by Penman-Monteith method using climate data collected from meteorological observatory located near the field and daily soil moisture content was recorded using Delta PR2 probe for model calibration and validation. In soil water balance method, deep percolation which represent the potential groundwater recharge was estimated by mass balance of total water input and output in TPR and DSR fields and found to be 1139 and 1305.6 mm for TPR and DSR respectively. The daily potential groundwater recharge in TPR and DSR fields was also predicted using unsaturated flow model HYDRUS-1D represented as bottom flux and it was found to be 1131 and 1336 mm, respectively. The performance of the HYDRUS-1D model was evaluated using statistical parameters viz. RMSE, NSE and R2 and found to be performing well. The percentage change between estimated and model predicted potential groundwater recharge was found to be 0.7% and 2.32% respectively, for TPR and DSR. From the study, it was concluded that 9% more irrigation water was applied in TPR fields and there was 14.6% more deep percolation in DSR as compared to TPR that may potentially contribute to groundwater recharge.en_US
dc.identifier.citationGulati, Dinesh (2021). Simulation of groundwater recharge from direct seeded and transplanted rice fields (Unpublished M.Tech. thesis). Punjab Agricultural University, Ludhiana, Punjab, India.en_US
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810177319
dc.keywordsDirect seeded rice, HYDRUS-1D, Groundwater recharge, Transplanted rice, Water balance methoden_US
dc.language.isoEnglishen_US
dc.pages61en_US
dc.publisherPunjab Agricultural University, Ludhianaen_US
dc.research.problemSimulation of groundwater recharge from direct seeded and transplanted rice fieldsen_US
dc.subSoil and Water Engineeringen_US
dc.themeSimulation of groundwater recharge from direct seeded and transplanted rice fieldsen_US
dc.these.typeM.Tech.en_US
dc.titleSimulation of groundwater recharge from direct seeded and transplanted rice fieldsen_US
dc.typeThesisen_US
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