Evapotranspiration over heterogeneous vegetated surfaces
Models and Applications
This work focuses on developing models to estimate evapotranspiration (ET), exploring the partitioning between soil evaporation and plant transpiration at both field and regional scales, and calculating ET over heterogeneous vegetated surfaces. Various algorithms with differing complexities, spatial, and temporal resolutions are created to estimate ET from diverse data inputs. A novel approach utilizing remote sensing to link water and carbon cycles is proposed. At the field scale, a hybrid dual source model (H-D model) is introduced, verified with observations from four ecosystems, and coupled with a soil water and heat transfer model to simulate interactions in the soil-plant-atmosphere continuum. At the regional scale, a hybrid dual source scheme and trapezoid framework-based ET model (HTEM) is developed using remote sensing images, validated with data from the USA and China, and analyzes the impact of agricultural water-saving on ET across different land use types. The potential of employing a remote sensing ET model for real water resource management in large irrigation districts is discussed. This work is particularly relevant for hydrologists, micro-meteorologists, and ecologists engaged in ET estimation and the interconnectedness of water and carbon cycles. Land evapotranspiration is a crucial topic in hydrology, meteorology, ecology, and agricultural sciences. Dr. Yuting Yang is affiliated with CSIRO Land and Water in
