Spatio-temporal Evolution Analysis of Land Use in Henan Province (1995-2015)

Abstract

Aiming at the change of land use types and their formation mechanism, based on Digital Elevation Model and the land use grid data, this paper uses the spatial analysis method to quantitatively analyze their spatial-temporal evolution characteristics, formation mechanism in Henan Province. The results show that, from 1995 to 2015, the rate of linear decrease of farmland is higher than that of linear increase of construction land. The area of forest grassland remains stable, and the area of water land is gradually increasing. The area decrease rate of farmland in the elevation of 50-100m is obviously higher than that in other regions, the decrease proportion of farmland in the elevation of 150-200m is the highest, and the water land are mainly distributed in low elevation region. More than 72% of the construction land concentrates in the region of elevation 0-100m, the area increase rate of construction land in the elevation of 50-100m is obviously higher than that in other regions, the increase proportion of construction land in the elevation of 150-200m is the highest. The reduced farmland is mainly converted into construction land, forest grassland and water land, the area of returning farmland to forest and grassland is basically occupied by construction land, the increased water land area mainly comes from farmland and forest and grassland, The increase area of construction land mainly occupies farmland, forest and grassland and water land.