Abstract:

Based on Landsat satellite imagery with a resolution of 30 meters covering the period from 1990 to 2020， land use/land cover information was interpreted and extracted. The study used dynamic change rate and land use transfer matrix methods to systematically analyze the spatiotemporal patterns of land use changes in the Ten Tributaries Basin over the past three decades. Additionally， using the Random Forest models， the driving forces of the structural transformation of land use were explored. The results showed that： （1） During the study period， forest area continued to expand， while sandy areas gradually decreased. The most significant increase was observed in construction land （47.5%）， followed by forest land （36.8%）， with no drastic changes in the structure of other components. （2） Frequent attribute transformations occurred among land use types， with mutual transformation between farmland land and grassland， and conversions from grassland and sandy land to forest land and construction land being the main characteristics. （3） In comparison to climate change， human activities played a predominant role in driving the structural transformation of land use in the basin， which were particularly reflected in the input of forest land， the output of grassland and construction land， and the transformation dynamics of sandy land.

Key words: land use, spatiotemporal characteristics, change patterns, driving forces, Ten Tributaries Basin