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Evaluation of Spatio-Temporal Evapotranspiration Using Satellite- Based Approach and Lysimeter in the Agriculture Dominated Catchment

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Title Evaluation of Spatio-Temporal Evapotranspiration Using Satellite- Based Approach and Lysimeter in the Agriculture Dominated Catchment
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Creator Utkarsh Kumar Ankur Srivastava Nikul Kumari Rashmi Bhabagrahi Sahoo Chandranath Chatterjee Narendra Singh Raghuwanshi
 
Subject Potential evapotranspiration Crop coefficient Landsat 8
 
Description Not Available
Crop coefficient (Kc) represents the actual crop growth of the crop. It plays an important role in estimating waterrequirements at the different growth stages of the crop. However, FAO 56 Penman–MonteithKcmethod does not accountfor spatial heterogeneity and uncertainty for regional climatic conditions significantly. Therefore, this study aims todevelop the relation betweenKcand normalized difference vegetation index (NDVI) using a linear regression and backcalculations. These relationships were adjusted to local conditions using information from survey data obtained duringRabi season (2014–2015). The NDVI–Kcmodel (r2= 0.86) has developed using NDVI–Kcfrom a fine resolution Landsat 8remote sensing data. NDVI–Kcregression equation was utilized for generating crop coefficient for different month ofseason. The Vegetation Index-based AET estimated was evaluated with lysimeter data for different crop growth stageacross the season. The results have shown that NDVI–Kcestimated AET has been better correlated with NDVI–Kcremotesensing model. Thus, the output of this research can help to calculate actual water demand in a command area and behelpful in allocating water from less demand area toward more demand area.
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Date 2021-06-19T06:03:22Z
2021-06-19T06:03:22Z
2021-04-06
 
Type Article
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/47342
 
Language English
 
Relation Not Available;