Determination of evapotranspiration on Dicle Basin

Abstract

The use of water in agriculture is a necessity for plant production, and it is necessary to determine the water consumption of the plant to meet the water needs of the plant in a sufficient and efficient way. Water consumption by plants varies not only with weather conditions, but also with plant variety. The use of suitable methods for calculating the water consumption of plants in the planning of irrigation systems at the basin level facilitates operations. Today, as a result of population growth, industrialization and especially climate change, the importance of water has increased as a result of global warming, use efficiency and performance criteria have gained importance. In this study, we intend to determine important parameters such as water consumption and plant biomass in large areas with satellite technology, which is one of the most important application areas of remote sensing. Evapotranspiration; It is the transfer of water from the soil to the atmosphere by evaporation and from plants to the atmosphere by transpiration. For this purpose, the SEBAL model was used, which is the Surface Energy Balance Algorithm for Land, which is one of the most preferred methods in the literature for mapping true evapotranspiration. With the execution of the model, data on reference evapotranspiration, plant coefficient, true evapotranspiration, indices of plant vegetation and biomass production were obtained. These values ​​were compared with climatic data and results obtained at field level. It is thought that remote sensing techniques, which produce much faster and less expensive results than climate data and calculation methods, will be used more in the near future.