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元坝深层礁滩气田基本特征与成藏主控因素 被引量:85
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作者 郭彤楼 《天然气工业》 EI CAS CSCD 北大核心 2011年第10期12-16,114,共5页
四川盆地元坝气田主要气源岩为上二叠统龙潭组(吴家坪组),其生烃强度大,储层为上二叠统长兴组礁滩相白云岩,具有中低孔隙度、中低渗透率的特点,是一个受构造控制作用较小、以岩性圈闭为主,且埋藏深度大、高含硫化氢、常压、低地温梯度... 四川盆地元坝气田主要气源岩为上二叠统龙潭组(吴家坪组),其生烃强度大,储层为上二叠统长兴组礁滩相白云岩,具有中低孔隙度、中低渗透率的特点,是一个受构造控制作用较小、以岩性圈闭为主,且埋藏深度大、高含硫化氢、常压、低地温梯度的大型气藏。东吴运动控制了晚二叠世沉积相与储层发育的位置,早中燕山运动控制了油气藏的形成,晚燕山运动以来的构造运动奠定了现今气藏的分布格局,适时发育的裂缝、大面积发育的礁滩相白云岩储层与烃源岩生烃高峰的有效匹配是气藏形成的关键。 展开更多
关键词 四川盆地东北部 元坝气田 岩性气藏 碳酸盐岩 生物礁 原油裂解气 成藏机制
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川东北开江—梁平海槽发育对T_1f 鲕粒岩分布的控制 被引量:63
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作者 杨雨 文应初 《天然气工业》 EI CAS CSCD 北大核心 2002年第z1期30-32,共3页
四川盆地东北部地区飞仙关期可划分为海槽、陆棚、台地 3个基本的沉积相带。开江—梁平海槽的发育对鲕粒岩的分布有明显控制作用。随着台地的不断增生 ,海槽萎缩消亡 ,鲕粒岩分布在纵横向上呈有规律的变化。鲕粒岩分布区不断向海槽迁移 ... 四川盆地东北部地区飞仙关期可划分为海槽、陆棚、台地 3个基本的沉积相带。开江—梁平海槽的发育对鲕粒岩的分布有明显控制作用。随着台地的不断增生 ,海槽萎缩消亡 ,鲕粒岩分布在纵横向上呈有规律的变化。鲕粒岩分布区不断向海槽迁移 ,发育层位从台地向海槽亦逐渐抬升。研究表明 ,在开江—梁平海槽两侧分布有铁山—梁平、铁山坡—开县两个鲕粒岩发育厚区 ,鲕粒岩累计厚度大 ,横向分布较稳定 ,是寻找鲕滩气藏的有利地区 ,目前在铁山坡—开县地区已展示出飞仙关组鲕滩气藏勘探的大场面。海槽内部的宣汉、开江一带无鲕粒岩分布 。 展开更多
关键词 四川盆地 东北 开江-梁平 海槽 飞仙关组 鲕粒岩
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Fluxes of CO_2, N_2O and CH_4 from a typical temperate grassland in Inner Mongolia and its daily variation 被引量:67
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作者 DONG Yunshe, ZHANG Shen, Ql Yuchun, CHEN Zuozhong & GENG Yuanbo1. Institute of Geography, Chinese Academy of Sciences, Beijing 100101, China:2, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China Correspondence should be addressed to Dong Yunshe 《Chinese Science Bulletin》 SCIE EI CAS 2000年第17期1590-1594,共5页
Using a dark enclosed chamber technique, the fluxes of CO2, N2O and CH4 from nature and disturbed grassland were measured on the spot in Inner Mongolian Temperate Grassland along the annual rainfall gradient section r... Using a dark enclosed chamber technique, the fluxes of CO2, N2O and CH4 from nature and disturbed grassland were measured on the spot in Inner Mongolian Temperate Grassland along the annual rainfall gradient section ranging from 450 to 200 mm. The results showed that the measured mean fluxes of CO2, N2O and CH4were (1 180.4 ±308.7), (0.010 ± 0.004) and (-0.039 ± 0.016) mg · m-2/h, respectively. The decrease of the fluxes of CO2, N2O and CH4 follows with that of annual rainfall gradient in the measurement area. Human activities, such as grazing and reclamation are also critical factors to affect the fluxes of these gases from grassland. Daily continuous measurement of CO2, N2O and CH4 fluxes showed a strong diurnal variation with higher emission in the daytime. A good relationship between the fluxes of CO2, N2O, CH4 and temperature was exposed in this study. 展开更多
关键词 northeast China TRANSECT (NECT) TEMPERATE GRASSLAND greenhouse gas flux.
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Subduction history of the Paleo-Pacific slab beneath Eurasian continent: Mesozoic-Paleogene magmatic records in Northeast Asia 被引量:60
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作者 Jie TANG Wenliang XU +1 位作者 Feng WANG Wenchun GE 《Science China Earth Sciences》 SCIE EI CAS CSCD 2018年第5期527-559,共33页
This paper presents a review on the rock associations, geochemistry, and spatial distribution of Mesozoic-Paleogene igneous rocks in Northeast Asia. The record of magmatism is used to evaluate the spatial-temporal ext... This paper presents a review on the rock associations, geochemistry, and spatial distribution of Mesozoic-Paleogene igneous rocks in Northeast Asia. The record of magmatism is used to evaluate the spatial-temporal extent and influence of multiple tectonic regimes during the Mesozoic, as well as the onset and history of Paleo-Pacific slab subduction beneath Eurasian continent. Mesozoic-Paleogene magmatism at the continental margin of Northeast Asia can be subdivided into nine stages that took place in the Early-Middle Triassic, Late Triassic, Early Jurassic, Middle Jurassic, Late Jurassic, early Early Cretaceous, late Early Cretaceous, Late Cretaceous, and Paleogene, respectively. The Triassic magmatism is mainly composed of adakitic rocks,bimodal rocks, alkaline igneous rocks, and A-type granites and rhyolites that formed in syn-collisional to post-collisional extensional settings related to the final closure of the Paleo-Asian Ocean. However, Triassic calc-alkaline igneous rocks in the Erguna-Xing'an massifs were associated with the southward subduction of the Mongol-Okhotsk oceanic slab. A passive continental margin setting existed in Northeast Asia during the Triassic. Early Jurassic calc-alkaline igneous rocks have a geochemical affinity to arc-like magmatism, whereas coeval intracontinental magmatism is composed of bimodal igneous rocks and A-type granites. Spatial variations in the potassium contents of Early Jurassic igneous rocks from the continental margin to intracontinental region, together with the presence of an Early Jurassic accretionary complex, reveal that the onset of the PaleoPacific slab subduction beneath Eurasian continent occurred in the Early Jurassic. Middle Jurassic to early Early Cretaceous magmatism did not take place at the continental margin of Northeast Asia. This observation, combined with the occurrence of low-altitude biological assemblages and the age population of detrital zircons in an Early Cretaceous accretionary complex,indicates that a strike-slip tectonic regime existed b 展开更多
关键词 Continental margin of northeast Asia Mesozoic-Paleogene Igneous rocks Paleo-Pacific slab Subduction
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川东北礁滩天然气勘探新进展及关键技术 被引量:46
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作者 郭旭升 胡东风 《天然气工业》 EI CAS CSCD 北大核心 2011年第10期6-11,113-114,共6页
川东北地区位于四川盆地东北部,是中国石化勘探南方分公司天然气勘探的主战场。该区地表地形复杂,二叠系、三叠系目的层埋藏深(5 500~7 500m),储层受沉积相带控制,识别难度大,经历多期构造演化且各区块差异大,给油气勘探带来极大的困... 川东北地区位于四川盆地东北部,是中国石化勘探南方分公司天然气勘探的主战场。该区地表地形复杂,二叠系、三叠系目的层埋藏深(5 500~7 500m),储层受沉积相带控制,识别难度大,经历多期构造演化且各区块差异大,给油气勘探带来极大的困难。近年来,该公司在已有成果认识的基础上,通过深化二叠系、三叠系台缘礁滩相油气地质综合研究及勘探技术攻关,进一步明确了台缘礁滩相储层发育特征和油气成藏富集规律;形成了独具特色的"相控三步法"礁滩储层有效预测技术和深部高精度三维地震采集处理一体化及复杂超深井钻井等先进适用配套技术,使得礁滩相勘探目标不断拓宽;探明了普光气田,新近发现了元坝气田,还取得了涪陵北部高陡复杂构造区复向斜部位礁滩相勘探突破,实现了天然气储量的快速增长。 展开更多
关键词 四川盆地东北部 中国石化勘探南方分公司 台缘礁滩 天然气勘探 配套技术 勘探成果 普光气田 元坝气田
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川东北地区须家河组沉积相与储层特征 被引量:46
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作者 钱治家 钟克修 《天然气工业》 EI CAS CSCD 北大核心 2009年第6期9-12,共4页
川东北地区上三叠统须家河组地层具有较大的勘探开发潜力,但长久以来对该地层的研究甚少,沉积相和储层研究已成为川东北地区须家河组油气开发急需解决的问题之一。通过岩心观察、薄片鉴定及样品分析测试工作,根据岩石特征及测井相分析方... 川东北地区上三叠统须家河组地层具有较大的勘探开发潜力,但长久以来对该地层的研究甚少,沉积相和储层研究已成为川东北地区须家河组油气开发急需解决的问题之一。通过岩心观察、薄片鉴定及样品分析测试工作,根据岩石特征及测井相分析方法,对川东北地区须家河组沉积相类型、储集空间类型、储层物性特征以及影响储层的因素进行了分析。结果表明,研究区须家河组主要发育辫状河三角洲相沉积,可进一步划分为三角洲平原、三角洲前缘及前三角洲3类亚相;储层低孔低渗,主要孔隙空间为次生孔隙和裂缝,裂缝—孔隙型是主要的储集类型;储层储集性能主要受沉积微相和成岩作用控制。 展开更多
关键词 四川盆地 东北 晚三叠世 沉积岩相 孔隙结构 储集层特征 油气藏形成
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Distribution of Soil Organic Carbon Fractions Along the Altitudinal Gradient in Changbai Mountain,China 被引量:44
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作者 ZHANG Min ZHANG Xiao-Ke +4 位作者 LIANG Wen-Ju JIANG Yong DAI Guan-Hua WANG Xu-Gao HAN Shi-Jie 《Pedosphere》 SCIE CAS CSCD 2011年第5期615-620,共6页
Understanding the responses of soil organic carbon(SOC) fractions to altitudinal gradient variation is important for understanding changes in the carbon balance of forest ecosystems.In our study the SOC and its fracti... Understanding the responses of soil organic carbon(SOC) fractions to altitudinal gradient variation is important for understanding changes in the carbon balance of forest ecosystems.In our study the SOC and its fractions of readily oxidizable carbon(ROC),water-soluble carbon(WSC) and microbial biomass carbon(MBC) in the soil organic and mineral horizons were investigated for four typical forest types,including mixed coniferous broad-leaved forest(MCB),dark coniferous spruce-fir forest(DCSF),dark coniferous spruce forest(DCS),and Ermans birch forest(EB),along an altitudinal gradient in the Changbai Mountain Nature Reserve in Northeast China.The results showed that there was no obvious altitudinal pattern in the SOC.Similar variation trends of SOC with altitude were observed between the organic and mineral horizons.Significant differences in the contents of SOC,WSC,MBC and ROC were found among the four forest types and between horizons.The contents of ROC in the mineral horizon,WSC in the organic horizon and MBC in both horizons in the MCB and EB forests were significantly greater than those in either DCSF or DCS forest.The proportion of soil WSC to SOC was the lowest among the three main fractions.The contents of WSC,MBC and ROC were significantly correlated(P < 0.05) with SOC content.It can be concluded that vegetation types and climate were crucial factors in regulating the distribution of soil organic carbon fractions in Changbai Mountain. 展开更多
关键词 active carbon fractions ALTITUDE forest ecosystem northeast China vegetation type
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新时期东北区资源型城市的发展与转型——伊春市的个案研究 被引量:35
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作者 刘云刚 《经济地理》 CSSCI 北大核心 2002年第5期594-597,共4页
本文通过对东北区资源型城市———伊春市的发展状态的分析 ,揭示了伊春正在走向衰退的现状 ,并指出国家发展政策的转变、城市本身的体制和机制的滞后、资源、区位和环境的变化等因素是造成伊春发展衰退的主要原因。基于制约因素的分析 ... 本文通过对东北区资源型城市———伊春市的发展状态的分析 ,揭示了伊春正在走向衰退的现状 ,并指出国家发展政策的转变、城市本身的体制和机制的滞后、资源、区位和环境的变化等因素是造成伊春发展衰退的主要原因。基于制约因素的分析 ,提出了分解林业企业、发展森林生态经济、拓宽就业渠道、营造城市投资环境等促进伊春城市转型的调控对策。本文通过对伊春的个案分析 ,借以丰富东北区资源型城市转型发展的实证研究。 展开更多
关键词 东北区 资源型城市 发展 转型 伊春市
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川东北地区白云岩储层地球化学特征对比研究 被引量:38
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作者 郑荣才 史建南 +2 位作者 罗爱君 李爽 李瑰丽 《天然气工业》 EI CAS CSCD 北大核心 2008年第11期16-21,133,共6页
埋藏白云岩化是白云岩储层成因的主导模式,流体来源、交代过程、溶蚀期次和成因特征等一系列与其密切相关的白云岩化成岩系统,已成为当今碳酸盐岩领域最前沿的研究热点和困扰勘探实践的重要基础地质问题。以岩石学特征研究为基础,通过... 埋藏白云岩化是白云岩储层成因的主导模式,流体来源、交代过程、溶蚀期次和成因特征等一系列与其密切相关的白云岩化成岩系统,已成为当今碳酸盐岩领域最前沿的研究热点和困扰勘探实践的重要基础地质问题。以岩石学特征研究为基础,通过划分成岩阶段,对比各成岩阶段的微量元素与稳定同位素的地球化学特征,获得以下认识:埋藏白云岩化作用是控制川东北地区下三叠统飞仙关组和上二叠统长兴组优质白云岩储层分布的关键;飞仙关组和长兴组埋藏白云岩化过程具有相对应的多期次交代和多期次溶蚀特点;白云岩化流体来源于具有高含锶、高盐度热流体性质的飞仙关组海源地层水,飞仙关组和长兴组的埋藏白云岩为同源流体的白云岩化产物。进而得出结论:以不整合面和断裂为流体输导系统的飞仙关组和长兴组滩、礁相地层的埋藏白云岩化过程,在时空展布和演化过程中耦合关系密切,属于以同一流体和同一流体输导体系为主导因素的白云岩化成岩系统。 展开更多
关键词 四川盆地 东北 晚二叠世 早三叠世 白云岩 储集层 成岩作用 地球化学特征
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鄂尔多斯盆地东北部下石盒子组致密砂岩储层特征及主控因素 被引量:41
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作者 张晓峰 侯明才 陈安清 《天然气工业》 EI CAS CSCD 北大核心 2010年第11期34-38,117,共5页
为揭示鄂尔多斯盆地东北部下二叠统下石盒子组致密砂岩储层的发育规律及主控因素,采用岩心观察、粒度分析、砂岩薄片鉴定、扫描电镜、毛细管压力分析、X衍射、有机质成熟度和包裹体测温等手段,研究了储层的岩石学特征、孔喉结构和物性... 为揭示鄂尔多斯盆地东北部下二叠统下石盒子组致密砂岩储层的发育规律及主控因素,采用岩心观察、粒度分析、砂岩薄片鉴定、扫描电镜、毛细管压力分析、X衍射、有机质成熟度和包裹体测温等手段,研究了储层的岩石学特征、孔喉结构和物性特征。结果表明:该区储层主要以中—粗粒岩屑石英砂岩为主,岩屑砂岩和石英砂岩次之;储集空间类型包括剩余原生粒间孔、剩余原生粒间微孔、粒间溶孔、粒内溶孔和微裂缝,次生孔隙是储集空间的主体;喉道类型以片状型、缩颈型、管状喉道型与粒间隙喉道型为主;储层的平均孔隙度为6.07%,主体介于3.0%~10.0%之间,渗透率平均值为0.093mD,80%的值介于0.001~0.4mD之间,属于以中、小孔—细、微喉组合为特征的致密砂岩储层。在此基础上,综合分析了致密储层与沉积、成岩作用的关系。结论认为:浅水三角洲砂岩是这些致密砂岩储层的物质基础;压实作用和胶结作用导致储层致密化;中成岩阶段有机酸对砂岩中不稳定矿物以及碳酸盐胶结物的溶解作用是储层形成的关键。 展开更多
关键词 鄂尔多斯盆地 东北 早二叠世 致密砂岩 储集层 成岩作用 浅水三角洲 溶解作用
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Tectonic implications of Late Paleozoic stratigraphic distribution in Northeast China and adjacent region 被引量:38
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作者 ChengWen Wang YueWu Sun +2 位作者 Ning Li GuoWei Zhao XiaoQin Ma 《Science China Earth Sciences》 SCIE EI CAS 2009年第5期619-626,共8页
An analysis of the distribution of the Late Paleozoic strata on Northeast China and adjacent region reveals a zonal pattern of the distribution around the core of the Jiamusi-Mongolia Block. The main part of Late Pale... An analysis of the distribution of the Late Paleozoic strata on Northeast China and adjacent region reveals a zonal pattern of the distribution around the core of the Jiamusi-Mongolia Block. The main part of Late Paleozoic marine strata in this area is co 展开更多
关键词 northeast China and ADJACENT area Late PALEOZOIC STRATA tectonic paleogeographic character Jiamusi-Mongolia Block
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A Comparative Study on Photosynthesis and Water Use Efficiency Between Clonal and Non_clonal Plant Species Along the Northeast China Transect (NECT) 被引量:30
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作者 蒋高明 董鸣 《Acta Botanica Sinica》 CSCD 2000年第8期855-863,共9页
Net photosynthesis ( P n ), transpiration ( E ), stomatal conductance ( g s) and water use efficiency (WUE) of more than 218 species belonging to two different reproductive functional types, i.e. clonal (115 ... Net photosynthesis ( P n ), transpiration ( E ), stomatal conductance ( g s) and water use efficiency (WUE) of more than 218 species belonging to two different reproductive functional types, i.e. clonal (115 species) and non_clonal species (103 species), along the 1 670 km Northeast China Transect (NECT) were analyzed. The results showed that P n and WUE appeared to be lower in the east and west ends of NECT, with peaks in the middle. Transpiration was found to be higher in the west end, where most temperate desert species were distributed. On the same site, most clonal species showed higher P n and related physiological variables than non_clonal species. For different growth forms over NECT, e.g. forest trees, shrubs and grasses, meadow steppe shrubs and grasses, typical steppe shrubs and grasses, the meadow steppe and typical steppe grasses, showed higher values of physiological variables than the forest or the desert species. But for the two reproductive plant functional types (PFTs), clonal species had higher physiological variables, with averages of 22%, 15%, 23% and 14% higher than the non_clonal ones for P n , E, g s, and WUE, respectively. Such differences indicated that clonal species might have advantages over non_clonal species in utilizing environmental resources such as light, CO 2, and especially water. 展开更多
关键词 PHOTOSYNTHESIS clonal species non_clonal species forest STEPPE warm desert northeast China Transect
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东北地区沿海经济带与腹地海陆产业联动发展 被引量:37
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作者 董晓菲 韩增林 王荣成 《经济地理》 CSSCI 北大核心 2009年第1期31-35,44,共6页
沿海地区与内陆腹地的海陆产业联动发展是沿海-腹地系统良性发展的核心,在东北地区尤其如此。文章首先从资源、经济、就业及环境方面,利用相关分析、演变过程分析、弹性分析等定量分析方法,探讨了东北沿海经济带与腹地海陆产业联动的动... 沿海地区与内陆腹地的海陆产业联动发展是沿海-腹地系统良性发展的核心,在东北地区尤其如此。文章首先从资源、经济、就业及环境方面,利用相关分析、演变过程分析、弹性分析等定量分析方法,探讨了东北沿海经济带与腹地海陆产业联动的动力机制。在此基础上,运用灰色关联度方法分析了东北地区沿海经济带海洋产业与内陆腹地各产业的疏密度,进而探究海陆联动发展的内部驱动力与海陆产业链的构造,为东北沿海地区与内陆腹地的统筹发展提供科学依据和发展建议。 展开更多
关键词 东北地区 沿海经济带 腹地 海陆产业联动
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川东北飞仙关组鲕滩气藏地震响应特征及勘探展望 被引量:34
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作者 王罗兴 谢芳 李油 《天然气工业》 EI CAS CSCD 北大核心 2000年第5期26-28,共3页
根据川东北地区已有的气井井旁地震资料 ,总结了下三叠统飞仙关组鲕滩气藏的地震响应特征 ,结合模型正演分析 ,建立了气藏分布的识别模式。据该模式 ,利用已有的地震资料 ,作提高讯噪比和速度反演处理后 ,对区内飞仙关组鲕滩储层分布进... 根据川东北地区已有的气井井旁地震资料 ,总结了下三叠统飞仙关组鲕滩气藏的地震响应特征 ,结合模型正演分析 ,建立了气藏分布的识别模式。据该模式 ,利用已有的地震资料 ,作提高讯噪比和速度反演处理后 ,对区内飞仙关组鲕滩储层分布进行了识别预测。到目前为止 ,已预测圈定鲕滩储层有利分布区块 2 5块 ,累计面积达 630km2 ,估算的天然气资源量达 50 0 0× 1 0 8m3以上。展示了飞仙关组鲕滩气藏广阔的勘探远景。 展开更多
关键词 四川盆地 气藏 早三叠世 地震响应特征 勘探区
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川东北地区飞仙关组储层中的埋藏溶蚀作用 被引量:30
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作者 曾伟 黄先平 +1 位作者 杨雨 王兴志 《天然气工业》 EI CAS CSCD 北大核心 2006年第11期4-6,共3页
根据沉积特征、孔隙类型及孔隙充填物的地球化学特征认识到川东北地区飞仙关组储层中有2期埋藏溶蚀作用:第一期埋藏溶蚀作用与上二叠统海槽相烃源岩成熟产生的有机酸有关;第二期埋藏溶蚀作用与热化学硫酸盐还原反应产生的H2S有关。两期... 根据沉积特征、孔隙类型及孔隙充填物的地球化学特征认识到川东北地区飞仙关组储层中有2期埋藏溶蚀作用:第一期埋藏溶蚀作用与上二叠统海槽相烃源岩成熟产生的有机酸有关;第二期埋藏溶蚀作用与热化学硫酸盐还原反应产生的H2S有关。两期埋藏溶蚀作用主要发生在台地边缘鲕粒滩相中,台地内泻湖及点滩相中溶蚀作用则相对较弱。分析认为:台地边缘成为天然气勘探的有利地区,台地内为欠有利地区。 展开更多
关键词 四川盆地 东北 早三叠世 储集层 溶蚀作用 埋藏作用 勘探评价
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对高含硫气田开发的几点建议 被引量:34
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作者 李士伦 杜建芬 +2 位作者 郭平 孙雷 严文德 《天然气工业》 EI CAS CSCD 北大核心 2007年第2期137-140,共4页
四川盆地东北部普光、罗家寨等三叠系飞仙关组鲕粒滩大中型气田的发现,标志着四川盆地天然气勘探开发进入了一个新阶段。如何安全、环保、高效地开发好这类特别复杂的高危气田,是摆在人们面前的一个难题。为此提出高含硫气田开发要依靠... 四川盆地东北部普光、罗家寨等三叠系飞仙关组鲕粒滩大中型气田的发现,标志着四川盆地天然气勘探开发进入了一个新阶段。如何安全、环保、高效地开发好这类特别复杂的高危气田,是摆在人们面前的一个难题。为此提出高含硫气田开发要依靠科技进步,既要在战略上藐视它又要在战术上重视它、既要解放思想又要实事求是、既要胆大又要心细的观点。高含硫气田的开发除了要解决好防腐、安全和环保三大关键问题外,基础还在地质和气藏工程研究上,进而提出了4点建议:第一,要重视边、底水能量以及活跃程度对气藏开发影响的研究;第二,气井配产及相应开发规模的确定要合理,要想方设法创造条件试采;第三,硫沉积实验和试验要早抓,尽快取得认识;第四,开展含硫气体相态实验,并在此基础上深化开发理论研究。另外,还要重视高含硫气藏的取样工作,做到真实可靠。 展开更多
关键词 高含硫化氢 气田 开发 建议 四川盆地 东北 三叠纪
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Using ^(137)Cs Tracer Technique to Evaluate Erosion and Deposition of Black Soil in Northeast China 被引量:33
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作者 FANG Hua-Jun YANG Xue-Ming +1 位作者 ZHANG Xiao-Ping LIANG Ai-Zhen 《Pedosphere》 SCIE CAS CSCD 2006年第2期201-209,共9页
Soil and water losses through erosion have been serious in the black soil region of Northeast China. Therefore, a sloping cultivated land in Songnen Plain was selected as a case study to: 1) determine the ^137Cs ref... Soil and water losses through erosion have been serious in the black soil region of Northeast China. Therefore, a sloping cultivated land in Songnen Plain was selected as a case study to: 1) determine the ^137Cs reference inventory in the study area; 2) calculate erosion and deposition rates of black soil on different slope locations; 3) conduct a sensitivity analysis of some model parameters; and 4) compare overall outputs using four different models. Three transects were set in the field with five slope locations for each transect, including summit, shoulder-slope, back-slope, foot-slope, and toe-slope. Field measurements and model simulation were used to estimate a bomb-derived ^137Cs reference inventory in the study area. Soil erosion and deposition rates were estimated using four ^137Cs models and percentage of ^137Cs loss/gain. The ^137Cs reference value in the study area was 2 232.8 Bq m^-2 with ^137Cs showing a clear topographic pattern, decreasing from the summit to shoulder-slope, then increasing again at the foot-slope and reaching a maximum at the toe-slope, Predicted soil redistribution rates for different slope locations varied. Among models, the Yang Model (YANG-M) overestimated erosion loss but underestimated deposition. However, the standard mass balance model (MBM1) gave predictions similar to a mass balance model incorporating soil movement by tillage (MBM2). Sensitivity analysis of the proportion factor and distribution pattern of ^137Cs in the surface layer demonstrated the impact of ^137Cs enrichment on calculation of the soil erosion rate. Factors influencing the redistribution of fallout ^137Cs in landscape should be fully considered as calculating soil redistribution rate using ^137Cs technique. 展开更多
关键词 black soil cesium-137 (^137Cs) northeast China quantitative models soil erosion
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Accuracy assessment of global historical cropland datasets based on regional reconstructed historical data——A case study in Northeast China 被引量:31
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作者 Li BeiBei Fang XiuQi +1 位作者 Ye Yu Zhang XueZhen 《Science China Earth Sciences》 SCIE EI CAS 2010年第11期1689-1699,共11页
Historical cropland datasets are fundamental for quantifying the effects of human land use activities on climatic change and the carbon cycle. Two representative global land-use datasets, the Global Land Use Database ... Historical cropland datasets are fundamental for quantifying the effects of human land use activities on climatic change and the carbon cycle. Two representative global land-use datasets, the Global Land Use Database (termed SAGE dataset) and the Historical Database of the Global Environment (termed HYDE dataset) have been established and used widely. Despite improvement of data quality and methodologies for extracting historical land use information, certain dataset limitations exist that need to be quantified and communicated to users so that they can make informed decisions on whether and how these land-use products should be used. The Cropland data of Northeast China (CNEC) is based on calibrated historical data and a multi-sourced data conversion model, and reconstructs cropland cover change in Northeast China over the last 300 years. Us- ing the CNEC as a reference, we evaluated the accuracy of cropland cover for SAGE and HYDE in Northeast China at spatial scales ranging from the entire Northeast China to provinces and even individual raster grid cells. Neither SAGE nor HYDE reflects real historical land reclamation. Cropland areas in SAGE are overestimated by 20.98 times in 1700 to 1.6 times in 1990. Although HYDE is better, there are significant disagreements in cropland area and distribution between HYDE and CNEC, especially in the 18th and 19th centuries. The proportion of total grid cells whose relative error was greater than 100% was 63.55% in 1700 and 53.27% in 1780. Global cropland dataset errors over Northeast China originate mainly from both the reverse calculation method for historical cropland data based on modern spatial patterns, and modern land-use outputs from satellite data. 展开更多
关键词 LUCC DATASET accuracy assessment northeast China
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以冰雪体育产业带动东北老工业基地经济增长的战略研究 被引量:26
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作者 闫育东 赵晶 《武汉体育学院学报》 CSSCI 北大核心 2006年第9期20-22,共3页
以理论与实践相结合的视角,系统地分析与论证了“新东北时代”发展冰雪体育产业对带动老工业基地国民经济增长所具有的战略意义。通过对东北老工业基地历史沿革的回顾,论证冰雪体育产业的开发背景,探讨发展中存在的问题及可持续发展的战... 以理论与实践相结合的视角,系统地分析与论证了“新东北时代”发展冰雪体育产业对带动老工业基地国民经济增长所具有的战略意义。通过对东北老工业基地历史沿革的回顾,论证冰雪体育产业的开发背景,探讨发展中存在的问题及可持续发展的战略,以期为发挥冰雪体育的产业价值,实现“努力快发展,全面建小康”的奋斗目标,起到积极的促进作用。 展开更多
关键词 体育产业 冰雪运动 东北 经济增长 战略研究
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Conceptualizing and Measuring Economic Resilience of Resource-based Cities: Case Study of Northeast China 被引量:29
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作者 TAN Juntao ZHANG Pingyu +2 位作者 LO Kevin LI Jing LIU Shiwei 《Chinese Geographical Science》 SCIE CSCD 2017年第3期471-481,共11页
This paper develops a conceptual model and an indicator system for measuring economic resilience of resource-based cities based on the theory of evolutionary resilience and the related concepts of persistence, adaptat... This paper develops a conceptual model and an indicator system for measuring economic resilience of resource-based cities based on the theory of evolutionary resilience and the related concepts of persistence, adaptation, and transformation. Nineteen resource-based cities in Northeast China were analyzed using the indicator system. The results showed that Liaoning and Jilin provinces had higher economic resilience than Heilongjiang Province. Panjin, Benxi, and Anshan in Liaoning Province were the top three cities, while Shuangyashan and other coal-based cities in Heilongjiang Province ranked last. Metals-and petroleum-based cities had significantly higher resilience than coal-based cities. The differences in persistence, adaptability, transformation, and resilience among resource-based cities decreased since the introduction of the Northeast Revitalization Strategy in 2003. Forestry-based cities improved the most in terms of resilience, followed by metals-based and multiple-resource cities; however, resilience dropped for coal-based cities, and petroleum-based cities falling the most. The findings illustrate the importance and the way to develop a differentiated approach to improve resilience among resource-based cities. 展开更多
关键词 resource-based cities economic resilience northeast China
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