Developed by Qiuhong Tang

Distributed Biosphere-Hydrological Model System

The University of Tokyo

Evolution of Hydrological Modeling

Key Features

E-mail: qiuhong (at)

DBH model is unique

 Use nontraditional datasets from remote sensing, in situ observation, and surveys

 Can model the connections among hydrology, the rest of the earth systems and human society.


DBH model gives the new direction of hydrological modeling

 The first generation hydrological model was based on statistical relationship or integration in a lumped/fake-distributed way.

 The second generation model, distributed model, solve the differential equation on discretized grids.

 The latest new (third) generation models, DBH model, used modern theories relating biosphere to provide a more realistic description of land surface hydrology. It incorporates the advanced schemes to understand the response of hydrological cycle to the change of biosphere, human society and climate system.


DBH model is versatile

 Can be linked to ESRI's ArcView for advanced GIS applications

 Support diverse global datasets

 Can simulate most of the Earth’s land with global datasets


DBH model is easy to use

 Links to original data rather than importing the data

 Allows you to update your original data

 Has automatic data and model verification routines


DBH model system includes advanced module for

 Manipulating time varying data

 Model calibration

 Mass and energy balance analysis

To contact the model maker:

Q. Tang, T. Oki, and S. Kanae