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| 陕北榆林地区沙漠化土地类型及时空变化分析 | |
| 引用本文： | 张 莉 王飞跃,张铁军.陕北榆林地区沙漠化土地类型及时空变化分析[J].中国地质,2002,29(4):426-430. |
| 作者姓名： | 张 莉 王飞跃 张铁军 |
| 作者单位： | 1. 中国科学院广州地球化学研究所,广东,广州,510640 2. 中煤航测遥感应用中心,陕西,西安,710054 3. 广东核电集团岭奥公司,广东,深圳,518000 |
| 基金项目： | 中国地质调查局资助项目(200112300004) |
| 摘 要： | 根据1987年和1999年两个时相TM遥感影像解译成果，运用地理信息系统空间分析方法及数理统计方法，分析了陕北榆林地区1987-1999年间土地沙漠化程度和土地沙漠化时空分布变化特征。并有所好转，这主要得益于当地政府对土地沙漠化的积极治理和有效政策，生态环境脆弱，气候干燥，多风是本区土地沙漠化的主要自然驱动因素，不合理的人类活动则是沙漠化的诱因，人为的积极治理措施可以有效控制沙漠化的进程。 |
| 关 键 词： | 土地类型 榆林地区 沙漠化 地理信息系统 时空变化 陕西 GIS |
| 文章编号： | 1000-3657(2002)04-0426-05 |
Types and temporal-spatial change of desertized land in the Yulin area, northern Shaanxi |
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| ZHANG Li,WANG Fei-yue,zhang Tie-jun.Types and temporal-spatial change of desertized land in the Yulin area, northern Shaanxi[J].Chinese Geology,2002,29(4):426-430. | |
| Authors: | ZHANG Li WANG Fei-yue zhang Tie-jun |
| Institution: | ZHANG Li 1,WANG Fei-yue 2,ZHANG Tie-jun 3 |
| Abstract: | According to the results of TM remote sensing image interpretat io n of two time phases in1987and1999and using the space analysis and ma thematic statistics of the geographic information system,the paper analyzes th e degree of land desertization and features of the temporal-spatial change of land desertiza-tion in the Yulin area,northern Shaanbei,in1987-199 9and discusses the cause of land desertization.The analytic results indicate that since the late1980s the process of the land desertization of the area as a whole has tended to be stable and taken a more or less favorable turn.Th is mainly benefits from the policies of active and effective control of land desertization implemented by the local government.The fragile ecologi-cal envi ronment ,arid climate and plenty of wind are main natural driving factors for land desertization,while irrational human activities are a factor of inducin g land desertization.Measures of active control and improvement can effectiv ely control the process of desertization. |
| Keywords: | Yulin area desertizatio n geographic information system temporal-spatial change |
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