| Session Details | |
| Section | HS - Hydrological Sciences |
| Session Title | Monitoring and Modelling SPAC Hydraulic Gradient to Improve Estimation of Plant Transpiration and Water Stress |
| Main Convener | Dr. Huade Guan (Flinders University, Australia) |
| Co-convener(s) | Dr. Hailong Wang (The University of Aberdeen, United Kingdom) Dr. Hugo Gutierrez (The University of Texas at El Paso, United States) |
| Session Description | Dynamic plant transpiration is driven by hydraulic gradient along the soil-plant-atmosphere continuum (SPAC), and modulated by plant hydraulic response to environmental stress. Thus, the SPAC hydraulic gradient and its dynamics provide valuable information to simulate transpiration, and to understand plant response to environmental (particularly water) stress. However, such information has not been well utilised either in modelling transpiration, to estimate plant water stress, or to understand plant drought response. This situation is partly due to a lack of reliable techniques to measure SPAC hydraulic gradient, and partly resulted from a lack of hydrological models to incorporate such information. Fortunately, recent technology and modelling development have opened up a range of opportunities to monitor and model SPAC hydraulic gradients to improve our understanding of SPAC and its response to changing environmental conditions. This session aims to bring together colleagues and peers who are interested in this new development, to share experience, findings, and opinion on SPAC hydraulic monitoring and modelling. We solicit contributions in, but not limited to (1) Technologies to monitor hydraulic state and gradient in SPAC (2) Models to incorporate hydraulic gradient in SPAC simulations (3) Transpiration and root water uptake modelling incorporating hydraulic data (4) Plant water stress from hydraulic response investigation (5) Root zone hydraulic redistribution (6) Night-time transpiration (7) Direct foliage absorption (8) Remote sensing plant hydraulic states |