Developing a predictive understanding of the terrestrial water cycle at local to global scale is essential for accurate assessment of water resources, agricultural production, and energy generation given current climate variability. TDycores project was launched in 2018 under DOE’s Scientific Discovery through Advanced Computing (SciDAC) program, a partnership between DOE’s Advanced Scientific Computing Research (ASCR) and Biological and Environmental Research (BER) Offices. TDycores is focused on developing rigorously verified, spatially adaptive, scalable, multi-physics dynamical cores for global-scale modeling of three-dimensional processes in the land and two-dimensional processes in the river component of the Energy Exascale Earth System Model (E3SM).