Estimation of Evapotranspiration using CROPWAT 8.0 Model for Taung-Nyo Dam Cultivated Area, Myanm
Journal Title: Invention Journal of Research Technology in Engineering & Management - Year 2019, Vol 3, Issue 5
Abstract
The estimate of actual evapotranspiration is very important not only in the study of climate changes and evaluation of water resources but also in crop water requirement scheduling etc. This study was conducted to estimate the evapotranspiration using CROPWAT 8.0 Model for Taung-Nyo dam cultivated area. It was collected the long term daily meteorological data including maximum temperature, minimum temperature, relative humidity, wind speed and sunshine hours from the Meteorological and Hydrological Department to calculate the reference evapotranspiration, ETO. Crop coefficient, KC was multiplied with ETO which is a measure of evaporative demand to get actual evapotranspiration, ET. The major crops in this cultivated area are Monsoon season crops which are paddy, sesame and maize and dry season crops which are green gram, bean, sugarcane and groundnut. The study observed that the maximum actual ET are 170.6 mm and 186.8 mm in the month of April for the average period and for each year, respectively due to high temperature and the minimum are 89.093 mm and 85.513 mm in December. So, it can be concluded from the observation that as the temperature increases, the ET increases and as the temperature decreases, it also decreases.
Authors and Affiliations
Mi Yin San
Keywords
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