干旱区生态环境知识资源中心

The current work includes developing and integrating an irrigation module within the Noah LSM-SLUCM (Single Urban Canopy Model) modelling framework. The model is run over a 49-km(2) urban domain in the Los Angeles metropolitan area at a high resolution (30 m) to understand the temporal variability and spatial heterogeneity of urban energy and water fluxes. The irrigation scheme developed is calibrated using residential water-use data and estimates of outdoor water consumption. Our results indicate that updating soil moisture to 75% of field capacity at a 6-day interval reasonably represents irrigation over this study region. To validate the model performance, we introduce a systematic evaluation process using MODIS-Landsat ET and Land Surface Temperature (LST) products as well as CIMIS- (California Irrigation Management Information System) based landscape ET observations. We conclude that addition of an irrigation scheme is critical to adequately simulate urban hydrological cycles, especially in arid and semi-arid regions.