Impact assessment of coal mining on land use/land cover using IRS-1A satellite data
D. P. Semwal*, Varsha Naithani, D. N. Pant & P. S. Roy
Indian Institute of Remote Sensing, Dehradun, Uttranchal.
*Present address- CASS (Environmental Sciences), IARI, New Delhi-12
In Meghalaya, one of the coals producing state in India has been observed
in the form of ecological degradation, depletion of land & forest cover,
soil, air and water pollution, particularly in the Bapung area of Jaintia
Hills. In the present study, multi-spectral and multi-date remote sensing
data has been analyzed using both visual and digital analysis techniques in
conjunction with intensive ground truth information for the detection of
temporal changes and subsequent impacts on land cover. The results showed
that out of total 700.2 Km2 area, 19% has gone under change during the last
12 years (1983-95). Pine forest, grass land, agricultural land and coal
mining areas consisting of coal mine, coal dump and colliery spoils have
increased by 2.9%, 2.8% and 1.2% respectively whereas the broad leaves
forest and agricultural land have decreased by 1.6%, 1.5% respectively. The
changes have effected the socio-economic and ecological condition of the
area. The overall decline in productivity of agricultural crops could be due
to the deposition of coal particles, waterlogging through seepage water.
Soil erosion, depletion and degradation of primary forests may have resulted
in some loss of bio-diversity.