Author(s)

Y.Chemin, T.Alexandridis

Abstract

Irrigation water consumption through remote sensing. Comparison at different scales in Zhanghe irrigation system, China T. Alexandridis & Y. Chemin International Water Management Institute, Sri Lanka Abstract Despite being particularly essential for improving the productivity of agriculture, water management in large-scale irrigation systems is often lacking of even the basic information. Techniques for estimation of the water consumption have recently been developed using the low-cost satellite images covering large agricultural areas. Appealing as it may be, the new techniques raise the question of accuracy, especially in the context of the measurement scale. Comparison of different scales of images and their influence in the calculation of the global volumes of water evaporated is giving critical information on the applicability of these advanced tools in a water management perspective. The Surface Energy Balance Algorithm for Land (SEBAL), calculating evaporation o

Keywords