A number of models and analytical tools have been developed by the group. Source codes will be shared upon request (email to basudev[at]iitb.ac.in). If you are interested to collaborate with us, we will be happy to talk to you.   

Geomorphological Hydrological Response Model (GHRM) 

GHRM is designed for outing flow in river basins using channel-network morphology information. The model essentially has two modules that generates unit hydrographs separately for pure surface flow (PSF) and mixed surface-subsurface flow (MSSF). It has three free/adjustable parameters. One can set up the model for a basin using its digital elevation model (DEM). The model is available in C as well as in MATLAB. Note that GHRM requires an effective rainfall generating model to perform discharge simulation. A MATLAB code has been developed to combine GHRM with the PDM rainfall-runoff model for continuous streamflow simulation. For more details, see https://www.sciencedirect.com/science/article/pii/S0309170816305322. Also see https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2010GL045415 for some of the basics.    

Calibration-free Dynamic Budyko (DB) Model 

The classic Budyko model is getting a lot attention lately due to its simplicity and its ability to explain hydrological processes. However, it cannot perform continuous streamflow simulation. The dynamic budyko (DB) overcomes this limitation by introducing a 'universal' decay function that allows us to express instantaneous-dryness index quantitatively. At the same time, it preserves the true essence of the original Budyko model -- calibration-free simulation capability. The model code is available in C. For more details about the model, see https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2016GL070173.

Recession Flow Analysis 

Hydrological processes responsible for transforming rainfall into streamflow and evapo-transpiration are infinitely complex and largely un-observable. Therefore, we generally utilize limited information to understand catchment hydrology through novel analysis. Recession flow analysis in particular provides us opportunities to understand the relationship between catchment storage (un-observable) and discharge. We have developed novel methods for recession flow analysis. Source codes are available in C as well as in MATLAB. For details, see https://www.sciencedirect.com/science/article/pii/S0309170814000116, https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/wrcr.20379, https://www.sciencedirect.com/science/article/pii/S002216941500445X, and https://onlinelibrary.wiley.com/doi/full/10.1002/hyp.11441.