There are 2 repositories under hydrology-modeling topic.
Code for the General Lake Model
Port of Generalized Watersheds Loading Functions - Enhanced (MapShed)
ECO3D: A three-dimensional land surface model
FOSS4G 2021 r.topmodel workshop
KarstID R package: a Shiny application for analyzing karst spring hydrographs
Stevens et al. (2022): Nature Communications. Tidewater-glacier response to supraglacial lake drainage.
Stevens et al. (2018): JGR:ES. West Greenland subglacial hydrology model.
Western Water Use Model CLI written in GO
UISCEmod: Python code for modelling water level time series focused on ephemeral karstic wetlands