| By dint of RS and GIS technology,this paper analyzed the quantities,inner structure,types and spatial distribution features of land-use/coverage change(LUCC) on Loess Plateau of east Gansu in the last fifteen years in 20th century,and the driving forces of LUCC were discussed in detail.It was discovered that all types of land-use were decreased to some extent,except for the construction land and grassland.The cultivated land area was decreased by 20 691 hm2, which was generally fertile land with high quality in plain location and was mainly changed into construction land;the woodland area was decreased by 12 269.1 hm2, which was mainly changed into grassland,farmland and construction land;the grassland area was increased by 33 488 hm2, which was mainly derive from the conversion of woodland and farmland;the construction land area was increased by 9 278.8 hm2 in fifteen years.The main driving forces of LUCC on Loess Plateau of east Gansu were the natural factors,the economic development,the population pressure,the adjustment of macro policies,and so on. |