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| 河西走廊荒漠化区域景观动态及变化机理分析 | |
| 引用本文： | 徐向宏,王辉,徐当会,陈翔舜.河西走廊荒漠化区域景观动态及变化机理分析[J].干旱区资源与环境,2004,18(3):44-49. |
| 作者姓名： | 徐向宏 王辉 徐当会 陈翔舜 |
| 作者单位： | 1. 甘肃农业大学林学院,兰州,730070 2. 兰州大学干旱农业生态国家重点实验室,兰州,730000 3. 甘肃省林业勘查设计研究院,兰州,730020 |
| 基金项目： | 甘肃省林业厅“河西走廊荒漠化土地景观格局变化机理及调控对策研究”项目资助 |
| 摘 要： | 应用马尔科夫模型法 ,对河西走廊荒漠化区域景观动态及变化机理进行分析研究 ,结果表明 :河西走廊的景观基质以沙漠和戈壁为主 ,在过去近半个世纪里没有发生根本性变化 ;各景观要素的斑块大小及变化特点是戈壁、流动沙地和半固定沙地等类型的平均斑块面积较大 ,且呈增大态势。而林地、固定沙地、水域和耕地等类型的平均斑块面积较小 ,并且呈减小态势 ;1 949～ 1 995年 ,景观要素转化速率较高的类型主要为耕地、草地、林地、固定沙地和半固定沙地 ,主要的转化形式有流动沙地与固定沙地、半固定沙地间的相互转化 ,盐碱地、耕地、草地、固定沙地、水域等向半固定沙地的转化 ,草地和水域向固定沙地的转化 ,各种不同土地类型向潜在沙化土地转化 ,以及耕地、林地、草地三者之间的相互转化。景观动态表明 ,该区域土地退化极易发生 ,而生态恢复则相对困难 ,区域景观格局总体上呈现向荒漠化方向发展态势。 |
| 关 键 词： | 河西走廊 荒漠化 景观动态 变化机理 |
| 文章编号： | 1003-7578(2004)03-044-06 |
| 修稿时间： | 2003年12月11 |
Dynamic Variation and Change Mechanism of Landscape of Desert Area in Hexi Corridor |
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| XU Xiang-hong,WANG Hui,XU Dang-hui,CHEN Xiang-shun.Dynamic Variation and Change Mechanism of Landscape of Desert Area in Hexi Corridor[J].Journal of Arid Land Resources and Environment,2004,18(3):44-49. | |
| Authors: | XU Xiang-hong WANG Hui XU Dang-hui CHEN Xiang-shun |
| Institution: | XU Xiang-hong 1 WANG Hui 1 XU Dang-hui 2 CHEN Xiang-shun 3 |
| Abstract: | The Markov model was applied to study the dynamic variation and change mechanism of landscape of desert area in Hexi Corridor. The results showed that landscape matrix of Hexi Corridor mainly is desert and Gobi , which have not fundamentally changed in the past semi-century;Characteristics of landscape elements were that the mean area of unused land ,flowing sand dune, semi-flowing sand dune and Gobi patches had become larger and larger , while the mean patch area of forest land, regular sand, arable land had decreased. During 1949 to 1995, landscape elements with high transforming speed mainly were arable land ,forest land ,grass land ,fixed sandy plain and semi-sandy plain , the main transforming forms were from flowing sand dune to fixed or semi-fixed sand dune, from alkali-saline land ,arable land ,grass land ,fixed land and aquatic area to semi-fixed sandy land ,from grass land and aquatic area to fixed land ,from different land types to desert land and inter-transform of arable land , forest land and grass land . Dynamic variation of landscape showed that this area was facing the problem of land degradation and hard to restore the ecological balance , while regional landscape pattern ,as a whole, showed the developing trend of desertification. |
| Keywords: | Hexi corridor desert land landscape dynamics change mechanism |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |