Spatio-temporal variability in evapotranspiration and moisture availability in different agroclimatic regions of Punjab

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dc.contributor.advisorKingra, P. K.
dc.contributor.authorAatralarasi S
dc.date.accessioned2019-08-21T04:58:27Z
dc.date.available2019-08-21T04:58:27Z
dc.date.issued2019
dc.description.abstractWater scarcity is faced by the state of Punjab due to depletion of groundwater resources. This situation urges more detailed study, in terms of region-wise water availability over long-term period. A number of studies have been conducted in the past examining the supply side of hydrological cycle i.e precipitation. But the current study deals with demand side i.e reference evapotranspiration (ETO), a parameter directly relating climate change in terms of water requirements. In addition to this, two other parameters viz. Aridity Index (AI) and Moisture Index (MI) were also studied. Computation of ETO was done by HS method, MI by Krishnan and Singh method and AI by UNESCO method. Trend analysis was studied with Mann- Kendall test and classical statistical procedures. Spatial interpolation was done in Arc GIS 10.4 software. The results concluded that annual ETO increased in north-east region and south-west @ 1.46 mm year-1 and 0.97 mm year-1 respectively. Rabi season ETO increased in north-east region @ 1.27 mm year-1. Annual MI was observed to be dry during first decade (1971-80), there was increase in water availability during the next two decades and again dry from 2000 onwards. Annual and seasonal AI values were observed to be highest in north-east followed by Central and lowest in south-west. A critical analysis of the study indicated decreased ETO till 2000 contributed to higher AI & MI values denoting more moisture availability till 2000 and decreased thereafter annually as well as seasonally due to higher ETO. The results also indicated spatial variability in moisture availability in the state from north-east to south-west. There was prominent difference in moisture ranges during earlier decades, but this difference was reduced in recent decades which might be due to huge impact of climate change in the north-east region. To conclude, south-west region faced severe water crisis even from earlier decades, but under recent conditions of climate change north-east region is also coming under the stress situation. This alarms the need for judicious water management in all regions of state.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810122795
dc.keywordsReference Evapotranspiration, Rainfall, Moisture index, Aridity index, Water availabilityen_US
dc.language.isoenen_US
dc.pages127en_US
dc.publisherPunjab Agricultural University, Ludhianaen_US
dc.research.problemSpatio-temporal variability in evapotranspiration and moisture availability in different agroclimatic regions of Punjaben_US
dc.subAgricultural Meteorologyen_US
dc.subjectnullen_US
dc.themeSpatio-temporal variability in evapotranspiration and moisture availability in different agroclimatic regions of Punjaben_US
dc.these.typeM.Scen_US
dc.titleSpatio-temporal variability in evapotranspiration and moisture availability in different agroclimatic regions of Punjaben_US
dc.typeThesisen_US
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