ISWC OpenIR  > 水保所知识产出(1956---)
李京京1; 吕哲敏1; 石小平1; 李 志1,2
Source Publication农 业 工 程 学 报236

域 1986 年、1995 年、2005 年和 2010 年土地利用矢量图,构建土地利用变化图谱和地形位指数,系统分析了土地利用在
地形梯度上的分布特征和变化历程。结果表明:1986-2010 年,土地利用类型以耕地、林地和草地为主,其中耕地减少
的 98.4%,其中,稳定型以低地形梯度的耕地和中高地形梯度的林地为主,反复变化型以低中地形梯度的草地与耕地间
的反复转化为主;其余图谱类型的比例均在 1%以下,主要变化类型均为中低地形梯度下耕地向建设用地的转化。在自然

Other Abstract

Land use/cover change (LUCC) is a key component of global climate change, and it has great impacts on climate,
hydrological processes, biodiversity and ecological processes. Therefore, more attentions have been paid to LUCC. As land
use pattern is significantly influenced by topographical factors that indirectly has impacts on water and surface energy balance,
analysis of land use pattern is thus a useful method to assess the rationality of LUCC according to the variations in their
topographic factors, which will further provide important information for land use management and soil conservation. Fen
River Basin is one of the regions with most severe soil loss on the Loess Plateau, and it has been experiencing great changes in
land use pattern due to the implementation of soil conservation measures. After using land use data of 1986, 1995, 2005 and
2010 to analyze the temporal and spatial variation in land use from 1986-2010, and using terrain niche index derived from
DEM (digital elevation model) to represent the topographical factors of different land use patch, the relationship between
terrain and land use change was systematically analyzed. Results showed that from 1986 to 2010, the main land use types of
the study region were farmland, forest and grassland, which account for 94% of the whole catchment, and the main land use
change types were the decrease of farmland and the increase of urban and residential land. The rate of land use change for the
period of 1986-1995, 1995-2005 and 2005-2010 were 13.2%, 25.8% and 36.4%, respectively, indicating a speed-up land use
changes. But for the whole study period, the land use change rate was 1.3%, which implied that the land use pattern was
recovering the original status with less human disturbance. Our results also showed that the spatial distribution of land use
types had close relationships with terrain gradient. The farmland, urban/residential land and water sources were mainly located
in the areas with low terrain gradient, while grassland in the areas with middle terrain gradient and forest in the areas with
mid-high terrain gradient. According to the land use change TUPU, we found that the primary land use change types were
stable type and repeated change type, which accounted for 98.4% of the whole catchment. The stable land use change type was
mainly composed of forest with large terrain gradient and farmland with small low terrain gradient, while the repeated change
type mainly from the mutual conversion between grassland and farmland at areas with mid-low terrain gradients. In addition,
the results indicated that LUCC in the Fen River Basin was the combined effect of natural processes, human activities and
government policies. The natural processes played a key role in the impacts of terrain gradient effect on land use change, while
human activities and policies were very important drivers that can make land use change rapidly in a short time period. Overall,
the land use pattern in the Fen River Basin has been becoming rational. However, some improper land use change types were
also detected. Based on analyzing the rationality of land use change by topographical factors, this study was meaningful to the
sustainable development of land resources, and it can provide important information for land use management in the Fen River

Keyword土地利用 地形 规划 地形位指数 变化图谱 汾河流域 黄土高原
Indexed By中文核心期刊要目总览
Document Type期刊论文
Affiliation1.西北农林科技大学资源环境学院,杨凌 712100
2.西北农林科技大学,黄土高原土壤侵蚀与旱地农业国家重点实验室,杨凌 712100
Recommended Citation
GB/T 7714
李京京,吕哲敏,石小平,等. 基于地形梯度的汾河流域土地利用时空变化分析[J]. 农 业 工 程 学 报236,2016,32(7):230-236.
APA 李京京,吕哲敏,石小平,&李 志.(2016).基于地形梯度的汾河流域土地利用时空变化分析.农 业 工 程 学 报236,32(7),230-236.
MLA 李京京,et al."基于地形梯度的汾河流域土地利用时空变化分析".农 业 工 程 学 报236 32.7(2016):230-236.
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