| 摘要: |
| 对影响黄河三角洲土地利用和土地覆盖变化的自然及人文因子进行了分析，筛选确定了该地区不同时期土地利用及土地覆盖变化的主导驱动因素。研究表明，50年代以前，该地区土地覆盖变化主要受气候因素、风暴潮和黄河改道等自然因素驱动；50～70年代，人类的大量开荒、胜利油田的开发使耕地、建设用地等迅速增加，但同时导致对土地自然生态系统的较大破坏，使土地地力下降、土壤盐渍化程度加重，土地生态趋于脆弱；80年代以来，蒸降比大的气候条件和淡水资源缺乏的水文状况成为该地区土地利用变化的主导自然驱动因子，不合理用水，林草、荒地的大量开垦等人类农业开发利用活动是该区土地利用变化的主导人文驱动因子，二者结合驱动该区土地利用的快速变化。 |
| 关键词: 黄河三角洲 土地利用 土地覆盖变化 驱动因子 |
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| 基金项目:教育部留学回国人员科研启动资金资助项目(教外司留[2002]247号);山东省科技攻关项目(02BS044) |
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| Analysis of driving forces of the land use and land cover change at the Yellow River Delta |
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| Abstract: |
| This paper analyzes the determinative factors of the land use and land cover change at the Yellow River Delta.The result shows that before 1950 s,the land cover change was mainly drived by natural factors,including climate,storm tide and the Yellow River changing its course;From 1950 s to 1970 s,the cultivated land and construction area increased rapidly,along with the virgin soil being reclaimed,but,at the same time,it damaged the land natural ecosystem and resulted in heavier soil salinity.Since 1980s,the large evaporation-precipitation ratio and shortage of freshwater became its determinative natural driving factors and the unreasonable human agricultural reclamation actions such as unreasonable water usage and large amount of virgin or grass land reclamation are the main human driving factors,both of which drives the land use and land cover changing rapidly. |
| Key words: the Yellow River Delta land use land cover driving factors |
