Development of novel embedded system for evapotranspiration estimation in Central India
by Vijaya S. Rahangadale; A.K. Mittra
International Journal of Instrumentation Technology (IJIT), Vol. 1, No. 4, 2015

Abstract: Automation in the agriculture domain has gained importance due to the need of effective water utilisation. Developed countries have centralised irrigation management information systems, which uses a network of automated weather stations across the country to record real-time data of solar radiation, soil temperature, air temperature, vapour pressure, wind speed, relative humidity, and precipitation. This data helps in estimating evapotranspiration (ET) which is further used for irrigation scheduling. Developing and under developed countries do not have networked weather stations, hence the estimation of ET becomes difficult, time consuming and cost prohibitive. Such countries have an indirect method using meteorological data as the only alternative. This problem leads to a high importance of finding cost effective ways to estimate ET using real time data. A major challenge is to collect weather data. This paper describes a proposed embedded system for the estimation of reference ET for irrigation control. The Penman-Monteith equation is used to compute the reference ET. The real time weather parameter has been recorded for the computation and the result has been compared with the Hargreaves ET equation for missing climatic data. The designed system is cost prohibitive and comparatively simple.

Online publication date: Sat, 16-Apr-2016

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