沙化
- desertification;reclaim
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[desertification] 由于气候的自然变化,或对半干旱地区的错误管理和使用而产生的干燥的、裸露的、沙漠般的状态
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重点地区沙化土地地理信息系统(GIS)的建立
Established Desertification Land Geographic Information System of Key Region China
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土地沙化监测GIS系统设计与开发
Design and Development of the GIS-based Land Desertification Monitoring System
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GIS及景观熵模型在沙化土地监测与评价中的应用研究
Landscape Entropy Model Application in the Monitoring and Assessment of Sandy Land
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基于遥感和GIS的北京北部洪积区土地沙化现状研究
Research into the Status of Desertification in the Alluvial Fan to the North of Beijing , Based on RS and GIS
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即通过卫星影像的处理、判读,辅以GPS地面定位调查及其它调查方法获得中国北方沙化土地基础数据;
That is , acquiring basic data by processing and interpreting the satellite image , assisted by ground investigation using GPS and other investigation method ;
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基于3S的草原沙化治理工程生态效益评价与实证研究
The study on ecological benefit of grassland desertification control project based on 3S technology
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利用MODIS数据识别若尔盖草地的沙化&分层分类方法
Application of MODIS data to identifying desertification in Zoige grassland : a layered-classfication method
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从农、牧、林角度比较了防护林(A)、农林复合(B)和林牧复合(C)三种措施防治沙化的效果。
The farmland sandy desertification preventing effect was compared : protective forest ( A ), the farming and forestry compound ( B ) and the forest and pasture compound ( C ) .
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采用LandsatETM+多时相影像,在地类光谱特征分析的基础上,用分层分离的方法,提取出沙化土地信息。
Multi_layer remote sensing information extraction of sandy land using multi_temporal Landsat ETM + images was developed based on spectral characteristic analysis .
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利用1997~1998年1∶25万辽宁省TM遥感影像及相应的GIS获取的数据,调查分析了辽宁省土壤侵蚀、土地沙化和盐渍化3种类型土地退化程度、面积和分布。
The degradation degree , area and distribution of three types of degraded land caused by erosion , desertification and salinization were investigated in Liaoning Province by using landsat TM 1 ∶ 250000 and GIS Data .
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高寒草甸、沼泽草甸、沙化草原中主要植物种都属于C3类型的光合代谢途径,它们都属于C3植物。
Species of meadow , swamp meadow and sandy grassland belonged to the main types of C3 photosynthetic pathway , and they all belonged to C3 plants . 3 .
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T2(羊粪和麦秸的混合腐熟物同沙化土的体积比为0.5∶1)产量最高,品质较好;
The treatment 2 's ( the ratio is 0.5 ∶ 1 between sandy-soil and the mixes humus of sheep manure and straw ) yield is the highest and quality is better ;
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利用LANDSATTM影像,对河北坝上地区1986年和2000年的土地退化,包括土地沙化、盐渍化和水土流失状况进行了分析,根据土地退化的成因,提出了退化土地的生态恢复重建的措施。
Using Landsat TM images , land degradation of Bashang region during 1986 and 2000 , including sandy desertification , salinization and water erosion are analyzed . Based on the causes of land degradation , ecological reconstruction measures of degraded land are put forward .
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通过陆地卫星TM图像及部分航空彩红外像片的解译发现,海南岛土地沙化主要分布在海滨平原、沙质台地区,并具有西重东轻、近海严重而向内陆减轻的特点。
By interpreting TM image and some aero color infrared photo , the paper gives us the land desertification distribution area , it has the feature that the desertification is worst in west and light in east , and the farther away from the sea , the lighter it is .
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以20世纪70年代陆地卫星MSS和90年代ETM图像为基础,通过分析对比,并配合野外检查验证,快速提取了塔里木盆地周边地区4种程度土地沙化类型的分布信息。
On the basis of Landsat MSS of 1970s and ETM image of 1990s and by means of analysis and comparison as well as field inspection , the authors rapidly extracted the distributive information of four levels of soil desertification along the peripheral areas of Tarim basin .
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近30a来,由于人口剧增和人类对自然资源的过量开发,导致该地区干旱缺水、土地盐碱化和沙化,制约了环境的持续发展。
In the past three decades , with the population explosion and overdevelopment of the natural resources , there are many environmental problems , such as water resource scarcity , and alkalized and sandy cultivated land , which restrain the environmentally sustainable development .
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通榆县是吉林省土地沙化最严重的典型县之一,沙化土地面积为19755×104hm2,占吉林省土地总面积的230%。
Tongyu County is the representative of the most serious land desertification of Jilin Province . It has 19.755 × 10 4 hm 2 sandy land , accounting for 23.0 % of the total land area of Jilin Province .
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彰武农田土壤沙化防治措施的效果研究
Effect of the Preventing Measures on Farmland Sandy Desertification in Zhangwu
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宁夏重点风沙区土地沙化成因分析
Causes of Soil Desertification in the Key Windy-sandy Region in Ningxia
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大庆市土地沙化现状及治理对策
The Actuality and Countermeasures of The Land Desertification in Daqing City
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长江源区沙化现象初步探讨
A preliminary study on Desertification in source region of Yangtze River
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川西北沙化土地动态分析评价及其治理对策
Dynamic analysis and assessment on north-west desertification land of Sichuan province
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赤峰市沙化土地结构与动态研究
Study on Structure and Dynamic of Desertification Land in Chifeng City
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围栏封育是沙化草地植被自然恢复最经济而有效的措施之一。
Fencing is one of the most economic and effective measures .
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玛曲县沙化土地主要分布在沿黄河两岸的阶地带和冲积河滩。
The desertification land distribute mainly in fluvial terrace and alluvion .
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彰武农田沙化分布规律的初步研究
Primarily study on desertification distribution law of farmland in Zhangwu County
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遥感技术在沿海土地沙化监测中的应用研究
Researches in applying remote sensing technology to coastal land desertification monitoring
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围封沙化草地种子岛效应研究
Study on the Seed Source Effect of Enclosed Sandy Grassland
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鄂尔多斯高原土地沙化过程中自然与人为因素的定量分析
The quantitative analysis of effect factors on sandy desertification in Ordos Plateau
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吉林省西部土地沙化动态变化
Spatial distribution of sandy desertification change in western Jilin Province