Agricultural University of Athens Green Roof Lysimeters Dataset

This dataset documents hydrological, soil, and meteorological measurements collected at the Green Roof Lysimeters Facility of the Agricultural University of Athens (AUA). The facility consists of thirty thermally insulated rooftop lysimeters located on the Library building of AUA (Iera Odos 75, Athens, Greece; 37.984460° N, 23.706663° E, elev. 40 m). The dataset was generated to analyze rainfall–runoff dynamics, infiltration capacity, and substrate water retention under varying green roof configurations in a Mediterranean climate. Measurements were obtained within the Urban BioRoof project (code 12CHN136) funded by the Hellenic General Secretariat of Research and Innovation. Monitoring included: Rainfall and runoff via tipping bucket collectors and rain gauges. Substrate moisture and temperature data were acquired using Turfguard™ dielectric wireless sensors (TORO, USA) with substrate-specific calibration (accuracy ±0.01 cm³ cm⁻³). These calibrated datasets are stored in the "total" sheet of the primary Excel file, while all other sheets contain raw data. Meteorological parameters (air temperature, humidity, wind speed, solar radiation, evapotranspiration) from a nearby weather station (~1 km from the site). The lysimeters were configured with two substrate depths (8 cm and 16 cm) and planted with three vegetation types, Festuca arundinacea (turfgrass), Sedum sediforme (succulent), and Origanum onites (xerophyte), plus bare and non-vegetated controls. Each treatment was replicated four times.