A Discussion of Assumptions and Solution Approaches of Infiltration into a Cracked Soil
A model for predicting rain infiltration into a swelling/shrinking/cracking soil was proposed (Romkens, M. J. M., and S. N. Prasad. 2006. Agricultural Water Management. 86: 196-205). Several simplifying assumptions were made. The model consists of a two-component process of Darcian matrix flow and Hortonian flow on the walls of the cracks. Model assumptions include: ? Water enters into the soil horizontally from the vertical cracked surfaces exclusively by diffusive flow, ? Vertical infiltration through the soil surface was negligible because of a severe surface sealing condition, ? Water flow along the vertical surfaces of the cracks is uniform over its circumference, and ? Wetting front advance interactions between adjacent vertical crack surfaces are assumed to be negligible. These assumptions will be examined and their effect on infiltration will be assessed. Also, alternative approaches involving different modular concepts for predicting infiltration and incipient ponding estimates will be examined.
cracked soil infiltration model predict examine
M. J. M. Romkens S. N. Prasad
USDA ARS National Sedimentation Laboratory, Oxford, MS USA Dept. of Civil Engineering, The University of Mississippi, University, MS USA
国际会议
山东东营
英文
392-400
2007-10-16（万方平台首次上网日期，不代表论文的发表时间）