Parallel Algorithms in a Physically-Based Hydrologic Soil Model

Abstract:

Enormous river basin information has been collected by for high resolution of the physically-based distributed hydrological model, while the scales of computational domain are often restricted by the intensive calculation. The parallel algorithms of physically-based regional hydrologic soil model (P-RHSM) in OpenGeoSys are brought forward in this paper. The object-oriented C++ programming in the model approaches the two objectives: one is data structure organizations including the spatial discretization of the computation domain with nodes density arrangement and solutions communication of temporal variables, the other is computational efficiency by parallel computing. The Message passing interface (MPI) communication is implemented in P-RHSM which is carried out on Linux supported symmetric multiprocessing computers. P-RHSM is applied to Heihe basin in the northwest China. The high-resolution results of temporal soil moisture content distribution, front movement and parallel performance is presented.

• Periodical: Applied Mechanics and Materials (Volumes 536-537)
• Pages: 1634-1638
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.536-537.1634
• Online since: April 2014
• Authors: Yan Liang Du, Shi Yan Wang, Shu Hua Yin, Zhan Po Mao, Su Zhen Yang
• Keywords: Distributed Hydrologic Soil Model, Heihe Basin, Object-Oriented Programming, OpenGeoSys, Parallel Computation

References

[1] Mayer, K. U., Frind, E. O., Blowes, D. W., Multi component reactive transport modeling in variably saturated porous media using a generalized formulation for kinetically controlled reactions. Water Resources Research, Vol. 38, (2002), p.1174–1195.

DOI: 10.1029/2001wr000862

[2] Hurk, V., Hirschi, M., Schar, C., Lenderink, G., Meijgaard, E. V., Soil control On runoff response to climate change in regional climate model simulations. Journal of Climate 17. (2004), p.595–605.

DOI: 10.1175/jcli3471.1

[3] O. Kolditz, Computational methods in environmental fluid mechanics. Springer, (2002).

[4] Wang, W., Kolditz, O., 2007. Object-oriented finite element analysis of thermo hydro-mechanical (thm) problems in porous media. International Journal of Numerical Methods in Engineering 69, 162–201.

DOI: 10.1002/nme.1770

[5] OpenGeoSys: http: /www. opengeosys. org/home.

[6] Memory, D. S., http: /www. ics. uci. edu/ javid/dsm. html.

[7] MPICH, on http: /www-unix. mcs. anl. gov/mpi/mpich1.

[8] Interface, M. P., on http: /www. mpi-forum. org.