eCite Digital Repository

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, 27 pp. 1650-1663. ISSN 1085-3278 (2016) [Refereed Article]


Preview
PDF
Not available
544Kb
  

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:Agricultural and Veterinary Sciences
Research Group:Agriculture, Land and Farm Management
Research Field:Agricultural Land Management
Objective Division:Energy
Objective Group:Mining and Extraction of Energy Resources
Objective Field:Coal Mining and Extraction
Author:Lechner, AM (Dr Alex Lechner)
ID Code:117771
Year Published:2016
Deposited By:Centre for Environment
Deposited On:2017-06-27
Last Modified:2017-07-17
Downloads:0

Repository Staff Only: item control page