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| 2010—2015年贵州省关岭县石漠化时空演变及人类活动影响因素 | |
| 引用本文： | 姚永慧,索南东主,张俊瑶,胡宇凡,寇志翔.2010—2015年贵州省关岭县石漠化时空演变及人类活动影响因素[J].地理科学进展,2019,38(11):1759-1769. |
| 作者姓名： | 姚永慧 索南东主 张俊瑶 胡宇凡 寇志翔 |
| 作者单位： | 中国科学院地理科学与资源研究所 资源与环境信息系统国家重点实验室,北京 100101 中国科学院大学,北京 100049 |
| 基金项目： | 国家自然科学基金项目(41571099);国家自然科学基金项目(41001278) |
| 摘 要： | 石漠化是中国西南喀斯特地区面临的重要环境问题之一,其演化过程和驱动机制分析一直是相关研究领域的难点和热点,尤其是人类活动的影响分析方面仍有待于进一步研究。论文选择贵州石漠化极其严重的关岭县为研究区,利用2010年SPOT5/ALOS数据、2015年的高分一号/资源三号数据等,结合地面调查、采用目视解译的方法获得了2010—2015年石漠化分布、演化过程及驱动因素等信息;在系统分析石漠化的空间分布及演化过程的基础上,着重分析土地利用类型、社会经济水平及石漠化治理工程等人类活动因素对贵州石漠化演化的影响。研究结果表明：① 关岭县石漠化土地占有很大比重(2015年占总土地面积的45%以上)且以中度石漠化为主;② 石漠化总体上得到明显改善,石漠化土地面积逐年减少,尤其是重度石漠化和极重度石漠化土地明显减少,但仍有部分石漠化土地的状况在恶化。③ 人类活动对石漠程度和演化过程具有重要的影响,首先,土地利用类型尤其是灌木林、旱地和有林地对石漠化演化起着重要的作用;其次,人口密度较大和GDP较高的地区,石漠化程度也较高且石漠化恢复治理的效果越不明显;另外,关岭县的各类石漠化治理工程取得了显著的成果,约1/3的处于稳定和得到改善的石漠化土地是通过治理工程来实现的。本文查明了土地利用类型、人口及石漠化治理工程与石漠化演化的关系,研究结果可为石漠化治理与生态恢复工作提供科学的依据。 |
| 关 键 词： | 喀斯特 石漠化 时空格局 演化过程 驱动机制 贵州 |
| 收稿时间： | 2018-09-18 |
| 修稿时间： | 2019-04-11 |
Spatiotemporal characteristics of karst rocky desertification and the impact of human activities from 2010 to 2015 in Guanling County,Guizhou Province |
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| YAO Yonghui,SUONAN Dongzhu,ZHANG Junyao,HU Yufan,KOU Zhixiang.Spatiotemporal characteristics of karst rocky desertification and the impact of human activities from 2010 to 2015 in Guanling County,Guizhou Province[J].Progress in Geography,2019,38(11):1759-1769. | |
| Authors: | YAO Yonghui SUONAN Dongzhu ZHANG Junyao HU Yufan KOU Zhixiang |
| Institution: | State key Laboratory of Resources and Environment Information System, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China University of Chinese Academy of Sciences, Beijing 100049, China |
| Abstract: | Karst rocky desertification (KRD) is one of the most important environmental problems in the karst area of Southwest China. Studies of KRD process and its driving mechanism have been the hot spots in the related research fields and particularly, the impact of human activities on KRD remains to be further studied. In this study, Guanling County of Guizhou Province, where KRD is extremely serious, was selected as the research area. Using SPOT5/ALOS data in 2010, GF-1/ZY-3 data in 2015, and information from field investigations, the KRD spatial distribution and KRD change data were obtained by visual interpretation. Based on the examination of the spatiotemporal change characteristics of KRD, the impact of human activities such as land use, socioeconomic development level, and KRD restoration projects were analyzed. The results of this study show that: 1) The KRD land in Guanling County is dominated by moderate KRD, and it occupies more than 45% of the total land area in 2015. 2) The deteriorating trend of KRD in Guanling County has been effectively controlled. The area of KRD land is decreasing year by year, and most of the KRD land is in a stable state, especially that the severe KRD land and the extremely severe KRD land are clearly reduced, but some of the KRD land is still deteriorating. 3) Human activities play important roles on KRD change. First, land use types, especially shrub forest land, non-irrigated farmland, and forestry land have important influences on the change of KRD. Second, the higher the population density and GDP, the higher the degree of KRD and the less the effect of restoration. The KRD restoration projects in Guanling County have made remarkable achievements, where about one-third of the stable and improved KRD lands were a result of these restoration projects. |
| Keywords: | karst karst rocky desertification (KRD) spatial pattern evolution process driving mechanism Guizhou Province |
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