Modeling of Water Flow in Reclaimed Mine Spoil with Embedded Lignitic Fragments Using Hydrus-1D

Autor: Qing-xiang Cai, Fengxi Wang, Jun Fan, Cong-an Ma, Zhuye Shi, Ming’an Shao, Hui Wang
Rok vydání: 2014
Předmět:
Zdroj: Mine Water and the Environment. 34:197-203
ISSN: 1616-1068
1025-9112
DOI: 10.1007/s10230-014-0299-z
Popis: Lignitic mine soils represent a dual-porosity medium consisting of a technogenic mixture of overburden sediments that include porous fragments embedded within a mostly coarse-textured matrix. Flow and transport process in such soils are not sufficiently understood. The objective of this study was to identify the most appropriate conceptual model for describing small-scale heterogeneity effects on flow based on the physical structure of the system. HYDRUS-1D was used to simulate water flow under field conditions. We compared a dual-porosity (mobile–immobile) model simulation of the field soil water with field monitoring results. The predicted and observed water content were in good agreement. Since the heterogeneity of the lignitic mine soil may lead to preferential flow, Coomassie brilliant blue dyes were applied to the reclaimed surface, revealing preferred flow paths through macro-pores surrounding the numerous, large rock fragments.
Databáze: OpenAIRE
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