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GIS支持下的盐池县土地沙漠化动态遥感监测与预估 被引量:8
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作者 李元科 全志杰 +1 位作者 吕恒 张美亮 《干旱环境监测》 北大核心 1998年第4期213-217,共5页
以2个不同时期遥感图像为主要信息源,分别解译编制2期土地沙漠化类型图,在ARC/INFO地理信息系统支持下,建立空间数据库,获得了盐池县1985—1995年土地沙漠化动态图和动态转移数据矩阵,可以定位、定性、定量地显示出前后两期间动... 以2个不同时期遥感图像为主要信息源,分别解译编制2期土地沙漠化类型图,在ARC/INFO地理信息系统支持下,建立空间数据库,获得了盐池县1985—1995年土地沙漠化动态图和动态转移数据矩阵,可以定位、定性、定量地显示出前后两期间动态演变格局。并用Markov链模型对未来演变趋势进行模拟和预测。说明盐池县属于正在发展的沙漠化地区,沙漠化程度进一步加剧,同时存在着“一边治理,一边破坏”的双重现象。 展开更多
关键词 土地 沙漠化动态 GIS 遥感监测 土壤监测
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基于landsat-8 OLI影像的沙漠化动态分析--以锡林郭勒盟为例 被引量:3
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作者 王艳琦 银山 +3 位作者 郭恩亮 彭秀清 郭连发 李雨薇 《内蒙古农业大学学报(自然科学版)》 CAS 北大核心 2018年第5期58-63,共6页
土地沙漠化问题作为生态环境脆弱性表现之一,以锡林郭勒盟沙漠化动态变化为研究对象,采用2000年、2010年、2015年3期Landsat-8 OLI影像,利用SPEI(标准化降水蒸散指数)、转移矩阵及动态度结合气象数据分析研究锡林郭勒盟地区沙漠化动态... 土地沙漠化问题作为生态环境脆弱性表现之一,以锡林郭勒盟沙漠化动态变化为研究对象,采用2000年、2010年、2015年3期Landsat-8 OLI影像,利用SPEI(标准化降水蒸散指数)、转移矩阵及动态度结合气象数据分析研究锡林郭勒盟地区沙漠化动态变化及其驱动力因素。结果表明:2000—2015年沙漠化动态度为-0.15,SPEI值为0.28,说明沙漠化程度总体呈现逆转趋势;2010—2015年动态度为0.01,且期间存在发展趋势。进一步研究表明,2000—2015年,降水量、气温、人口、大牲畜数量呈上升趋势,起沙风速≥4.5 m/s天数呈现减少趋势,造成沙漠化逆转与发展的驱动因素包括区域气候变化的响应与人类活动的干预,以期为沙漠化治理提供理论依据与支持。 展开更多
关键词 Landsat-8 OLI 锡林郭勒盟 沙漠化动态 驱动因素
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THE DYNAMIC MONITORING OF HORQIN SAND LAND USING REMOTE SENSING 被引量:1
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作者 HU Yuan-man JIANG Yan +3 位作者 CHANG Yu BU R en-cang LI Yue-hui XU Chong-gang 《Chinese Geographical Science》 SCIE CSCD 2002年第3期238-243,共6页
Horqin Sand Land is regarded as the typical region for studying the problemof desertification. The integration of 3S(GIS, GPS and RS) techniques offer a roost helpful methodto study and monitor the dynamics of deserti... Horqin Sand Land is regarded as the typical region for studying the problemof desertification. The integration of 3S(GIS, GPS and RS) techniques offer a roost helpful methodto study and monitor the dynamics of desertification. Based on the data derived from 3 periods'multitemporal Landsat TM imagery of the 1990s, the regional land use and dynamics of desertificationin Horqin Sand Land were studied. The main results revealed that: 1) as long as the general changetendency was concerned, the desertification of Horqin Sand Land would continue to spread; 2) therewas a gradual decrease in the area of both moving sand dunes and semi-stabilized ones, which meantthat fruitful progress had been made to control the desertification during the 1990s; 3) as a resultof unreasonable cultivation, the total area of stabilized sand dunes and grassland in the middleand western region decreased obviously. It suggested that the increasing damage caused by human wasleading to the hazard of further desertification. So in the future, it is necessary to take moreeffective measures to control the spread of desertification and restore the degraded ecosystems forthe purpose of optimizing the global eco-environment in Horqin Sand Land. 展开更多
关键词 horqin sand land DESERTIFICATION remote sensing dynamic monitoring
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Deep soil water infiltration and its dynamic variation in the shifting sandy land of typical deserts in China 被引量:22
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作者 YANG WenBin TANG JinNian +2 位作者 LIANG HaiRong DANG HongZhong LI Wei 《Science China Earth Sciences》 SCIE EI CAS 2014年第8期1816-1824,共9页
Soil moisture is the key resource constraint in arid ecosystems, and has been a focus of research on restoration. However, quantitative studies on the contribution of rainfall to deep soil rainfall infiltration are la... Soil moisture is the key resource constraint in arid ecosystems, and has been a focus of research on restoration. However, quantitative studies on the contribution of rainfall to deep soil rainfall infiltration are lacking. In this study, we used the YWB-01 Deep Soil Infiltration Water Recorder which had been invented by ourselves to measure the quantity of rain infiltration into deep soil, 150 cm below ground, in four locations in China: Mu Us Sandy Land and Ulan Buh, Tengger, and Badan Jilin deserts over a 2-year period. We found:(1) Deep soil rainfall infiltration decreased progressively from east to west and from semiarid to arid areas, with two locations completely lacking rainfall infiltration. Heavy rain was important to deep soil infiltration in shifting sandy land of arid and semiarid areas.(2) Seasonal variation of infiltration was correlated with rainfall, with a time lag that was less apparent in areas with more rainfall.(3) For single intense rainfall events, infiltration maximums occurred 40–55 h after the rainfall, during which the infiltration rates increased rapidly before reaching a peak, and then decreased slowly. Continuous infiltration could last about 150 h. Rainfall infiltration was determined by the combined action of intensity, quantity and duration. Rainfall with low intensity, long duration, and large quantity was most favorable for deep soil infiltration. Our results can be used in water resource assessments and protection during eco-restoration in the arid and semiarid areas in China. 展开更多
关键词 deep soil water infiltration dynamic variation RAINFALL shifting sandy land arid and semiarid areas
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