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首页> 外文期刊>Journal of Agrometeorology >Performance of radiation-based reference evapotranspiration equation developed for Indian sub-humid conditions
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Performance of radiation-based reference evapotranspiration equation developed for Indian sub-humid conditions

机译：针对印度半湿润条件开发的基于辐射的参考蒸散方程的性能

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摘要

In this study, asite-specific radiation based equation for estimating reference evapotranspiration (ET-0) was developed and its performance was statistically analysed in comparison to widely accepted FAO Penman-Monteith (FAO-56 PM) model and four radiation-based ET-0 methods for sub-humid Hazaribagh region of Jharkhand state. The equation was developed with daily values of incoming solar radiation in conjunction with air temperature (minimum and maximum) by considering daily FAO-56 PM ET0 values as index with weather dataset of 15 years (1990-2004). The performance of developed equation validated with eight years (2005-2012) daily weather dataset revealed that it estimated E-0 values better than other radiation-based methods. The respective higher and lower values of agreement index and root mean square error with FAO-56 PM ET0 values during validation period confirms efficacy of developed equation whose performance tested at another Indian sub-humid location (Pantnagar) confirmed its suitability as well. Considering the limitations associated with reliability and availability of weather data especially in developing countries, developed equation is recommended as practical one to estimate ET0 in sub-humid climatic conditions if FAO-56 PM model cannot be used due to non-availability of required weather parameters at a location.
机译：在这项研究中，开发了用于估计参考蒸散量（ET-0）的基于特定地点辐射的方程，并与广泛接受的FAO Penman-Monteith（FAO-56 PM）模型和四个基于辐射的ET-贾坎德邦亚湿润哈扎里巴格地区的0种方法。通过将FAO-56 PM ET0的每日值作为具有15年（1990-2004年）天气数据集的指数，将太阳辐射的每日值与气温（最低和最高）相结合来开发该方程式。经过八年（2005-2012年）每日天气数据集验证的已发展方程的性能表明，其估计的E-0值优于其他基于辐射的方法。在验证期内，协议指数和均方根误差分别与FAO-56 PM ET0值的较高和较低值，证实了所开发方程的有效性，该方程在另一个印度半湿润地区（潘纳加尔）的性能测试也证明了其适用性。考虑到与天气数据的可靠性和可用性相关的局限性，特别是在发展中国家，建议使用已开发的方程式作为实用的方程式，如果由于无法获得所需天气参数而无法使用FAO-56 PM模型时，在亚湿气候条件下估算ET0在一个位置。

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