遥感与地理信息系统学报

抽象的

Estimation and Mapping Spatiotemporal Variability of Crop Water Requirement for Sugarcane in Arjo Dedessa Sugar Factory and its Surrounding

Etefa Tilahun Ashine, Mamuye Busier Yesuf, Andualem Shigute Bokke

To meet the ever-growing demand of sugar, a great focus has to be given to its input, which is a sugar cane crop, and management of the crop’s water requirements. This study was initiated with the objective of estimating and mapping the spatiotemporal variability of ratton sugar cane (Saccharum officianarum) crop water requirements at the Arjo-Dedessa sugar factory and nearby areas. Arc GIS 10.4.1 and CROPWAT 8.0 software were the materials used. Fourteen meteorological stations were delineated, and data from ten stations were used for analysis. The measured data and predicted value proved the geostastical tool’s applicability. According to the mapping, the annual crop water need varied from 1296.5 millimetres to 1752.36 millimetres using the inverse distance weighting method. The apparent regional variation in the yearly water need of sugar cane crops was attributable to variation in reference evapotranspiration caused by elevation. The influence of altitudinal variations, higher elevation as opposed to lowland areas, was the result for the likelihood of a rise in crop water demand values from a high elevation to a relatively low elevation location.