2. Material and Methods
2.1. Irrigation Demand Simulation
A plant growth model SUNFLO [6] [7] is the core to simulate sunflowers’ growth, with considering
environmental impacts and genotype diversity. It models plant functions, such as photosynthesis,
morphogenesis, transpiration, biomass production, and biomass distribution. Its water cycle is mainly co-
functioned by root water absorption and transpiration from the plant side, and rain, irrigation, and
evaporation from the environment side (see Figure 1). Irrigation information is integrated to analyze
agricultural water use and agricultural impacts on water resources.