LU Chui-yu 1, QIN Da-yong 1, ZHANG Jun-e 1, WANG Run-dong 1, 2

1. China Institute of Water Resources & Hydropower Research, Beijing 100038, China,
2 . North China University of Water Resources and Electric Power, Zhengzhou 450011, China

Abstract: The article introduced a distributed hydrologic model named MODCYCLE. The model is physically based, aimed at using for long-term basin-scale water balance analysis. In space discretization the model uses sub-basin division method based on DEM, and land use or soils dissimilarity can be taken into account as well. The model allows simulating a number of different physical processes in a watershed, delineating complicated water transformation processes and relations among precipitation, soil water, surface water and groundwater, and several main kinds of human activities are also taken into account in the model, which enables the model to be used in complicated simulation conditions with human intervention. In addition, MODCYCLE has some other advanced features. Firstly, the model is developed in Object-Oriented-Programming method (OOP) by C ++ language, so it has a clear modularized structure and flexible for extension of function. Secondly, the input and output system of the model is based on database using ADO database interface to facilitate data management. Thirdly, a leveled water balance analysis mechanism is developed in the model, not only for displaying detailed water balance relations in and among different water sub-systems, but also for the convenience of model debugging. Furthermore, benefited from the modularized structure of the model, parallel computation capacity is realized in the model, which dramatically enhances simulation efficiency under multi-core computing environment.

Key words: distributed hydrological model, object oriented, four waters transformation, parallel computation, MODCYCLE

Published in: Journal of Hydraulic Engineering, Vol. 43, No. 10, 2012