THE LOCAL STORAGE COEFFICIENT OF A LAYERED SOIL

Autor:	E. Chiorescu, Ş. Popescu, D. Prepeliţă
Rok vydání:	2009
Předmět:	Environmental Engineering Water retention curve Soil morphology Soil science Management Monitoring Policy and Law Pollution Soil gradation Physics::Geophysics Field capacity Soil structure Pedotransfer function Soil water Water content Physics::Atmospheric and Oceanic Physics Mathematics
Zdroj:	Environmental Engineering and Management Journal. 8:447-452
ISSN:	1843-3707 1582-9596
DOI:	10.30638/eemj.2009.060
Popis:	Analytical equations for the variation of soil moisture content and for the local storage coefficient for a layered soil with a relatively shallow water table were developed in this study, based on a linear distribution law of the moisture retention on soil’s profile, and the van Genuchten-Mualem parametrical model for the moisture–suction curve. By considering this mathematical model, an original computer code was written in MATLAB to determine and then to graphically represent the functions of moisture variation (for a constant depth of the water table), and the variation law of the local storage coefficient as a function of a variable water table depth, both for a layered soil and also for a homogenous one, with the same total thickness. Theoretical results and the computer code were applied for a representative case study. Thus, it was possible to obtain a valid comparative analysis concerning the nature of the soil (layered / homogeneous), and a graphical representation of the moisture distribution and the local storage coefficient.
Databáze:	OpenAIRE
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