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The impact of underground longwall mining on prime agricultural land: A review and research agenda

Citation

Lechner, AM and Baumgartl, T and Matthew, P and Glenn, V, The impact of underground longwall mining on prime agricultural land: A review and research agenda, Land Degradation and Development: Management of Terrestrial Environments, 27, (6) pp. 1650-1663. ISSN 1085-3278 (2014) [Refereed Article]

Copyright Statement

Copyright 2014 John Wiley & Sons, Ltd.

DOI: doi:10.1002/ldr.2303

Abstract

Coal mining and agriculture have repeatedly come into conflict when they co-occur. Although seemingly benign when compared with surface mining, underground coal extraction techniques (including longwall mining) cause subsidence of agricultural land and loss of productivity. Despite growing concerns for global food security and increasing demand for coal resources, there is little peer-reviewed literature on the impacts of longwall mining in prime agricultural areas. In this paper, we examined the present knowledge of subsidence impacts of longwall mining on agriculture and how this may be interpreted for specific locations such as Australia. The review found that subsidence affects soil properties, hydrology and topography. The main impacts on agriculture are altered soil and groundwater hydrology, modified topography associated with increased erosion or waterlogging risk, and zones of compaction or cracking that cause soil physical and chemical changes. Agricultural productivity is also reduced through altering the types of farming practices that are suited to subsided non-uniform landscapes, decreasing farming efficiency through increasing paddock heterogeneity and decreasing ease of workability. There is a need to consider these multiple impacts under local conditions, with particular regard to the interaction of mine subsidence-associated disturbances with farming practices. We conclude by describing future research directions required for Australia and other countries outside of the USA—where most of the research has been conducted. Australia has unique soil and climatic conditions making extrapolation of studies from the USA on subsidence impacts and mitigation problematic.

Item Details

Item Type:Refereed Article
Keywords:agriculture, crop productivity, longwall mining, coal mining, subsidence, food security, impact mitigation
Research Division:Environmental Sciences
Research Group:Environmental Science and Management
Research Field:Environmental Impact Assessment
Objective Division:Environment
Objective Group:Land and Water Management
Objective Field:Mining Land and Water Management
Author:Lechner, AM (Dr Alex Lechner)
ID Code:117365
Year Published:2014
Web of Science® Times Cited:14
Deposited By:Centre for Environment
Deposited On:2017-06-08
Last Modified:2017-10-23
Downloads:0

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