陕西黄土台塬区土地系统变化特征分析
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国家自然科学基金项目"西北黄土高原台塬区土地资源开发利用与生态安全动态分析"(41071057);国家自然科学基金项目"关中-天水经济区种植业生态服务功能的时空变异性与尺度效应"(41001388)


Land System Change Features in Shaanxi Loess Platform Region
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    摘要:

    基于GIS和RS支持,采用土地利用变化系列指标对陕西黄土台塬区1985-2010年土地利用变化特征进行了分析。结果表明,2010年黄土台塬区耕地984337.30 hm2,草地143030.47 hm2,建设用地105871.35 hm2,分别占总面积77.89%,11.32%和8.38%;研究时段内耕地、草地、林地、水域依次减少20866.61,11065.22,1186.44和748.96 hm2,分别比1985年减少了2.08%,7.18%,4.60%和11.64%;建设用地增加33902.8 hm2,为1985年的47.11%;建设占用耕地26668.8 hm2,占建设用地转入流的96.26%;草地转耕地18923.9 hm2,占草地转出流的93.24%;1985-1990年土地系统较为稳定,综合动态度为0.52;1990-1995土地利用变化活跃,综合动态度达到3.60,其后逐渐降低,到2005-2010降低为1.16,土地系统趋于稳定。空间上,耕地转建设用地在城镇周边幅度较大,草地和耕地互转主要在渭南台塬东部、咸阳塬北部以及宝鸡台塬区。

    Abstract:

    Based on GIS and RS, landuse variation features in the Shaanxi loess platform region from 1985 to 2010 were analyzed by a series of landuse change indexes. Results are as follows:In 2010, cultivated land, grassland and built-up land occupied 984 337.30, 143 030.47 and 105 871.35 hm2, whose percentages over the total area of the loess platform region were 77.89%, 11.32% and 8.38%, respectively. During the research period, cultivated land, grassland, forestry land and water area decreased by 20 866.61, 11 065.22, 1 186.44 and 748.96 hm2, respectively, accounting for 2.08%, 7.18%, 4.60% and 11.64% of each of land types in 1985, while built-up land increased by 33 902.8 hm2, which took up 47.11% of built-up land in 1985. There were 26 668.8 hm2 cultivated land changed into built-up land, accounting for 96.26% of the total area changed into built-up land, and 18 923.9 hm2 grassland changed into cultivated land, accounting for 93.24% of the total area changed from grassland. The land system was relatively stable during 1985-1990 (synthetic dynamic index was 0.52), and the landuse change was active during 1990-1995 (synthetic dynamic index was 0.36). Since then, the synthetic dynamic index gradually decreased, the land system tended to be stable, and the value of synthetic dynamic index decreased to 1.16 from 2005 to 2010. In space, cultivated land changed into construction land was tremendously distributed around cities and towns, the mutual transformation between the cultivated land and grassland mainly occurred in the eastern part of Weinan platform region, the northern part of Xianyang and Baoji platform region.

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马彩虹,任志远.陕西黄土台塬区土地系统变化特征分析[J].水土保持通报,2014,(1):237-241

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  • 收稿日期:2013-01-14
  • 最后修改日期:2013-04-01
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  • 在线发布日期: 2016-03-29
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