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沉积物环境指标
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  “沉积物环境指标”译为未确定词的双语例句
     In this paper some environmental indexes of sediments from Nansihu Lake, such as lithology, sedimentation rate, magnetic susceptibility, TOC (total organic carbon) , TN( total nitrogen), C/N and fossil pigment, were analyzed.
     本文对南四湖沉积物环境指标,如岩性、沉积速率、沉积物磁化率、总有机碳、总氮及碳氮比(C/N)和色素等进行了分析.
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  相似匹配句对
     Sediment is one of the environmental factors affecting mangrove afforestation.
     沉积物是红树林宜林环境指标之一。
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     Paleosalinity indicators in Holocene sediments of Taihu Lake and its environmental significance
     太湖全新世沉积物的古盐度指标及其环境意义
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     Analysis of Grain-size Populations With Environmentally Sensitive Components in Aeolian Deposits and Their Implications
     风成沉积物环境敏感粒度指标的提取及意义
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     CONTAMINATION OF SEDIMENTS AND ENVIRONMENTAL SEDIMENTOLOGY
     沉积物污染和环境沉积学
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     index;
     指标;
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Climatic fluctuation and process of lake changes were revealed through high resolution analysis on environmental indices based on sediments of Ningjin Lake. In the period of climatic optimum( p CO ), climate was warm and stable,precipitation was high, and there were a lot of herbs and trees aroud lakes. But there was a short period of low temperature from 6000 aBP to 5500 aBP. In late of p CO , climate was unstable and obviously fluctuated. In Late Holocene, the temperature fluctuated regularly,...

Climatic fluctuation and process of lake changes were revealed through high resolution analysis on environmental indices based on sediments of Ningjin Lake. In the period of climatic optimum( p CO ), climate was warm and stable,precipitation was high, and there were a lot of herbs and trees aroud lakes. But there was a short period of low temperature from 6000 aBP to 5500 aBP. In late of p CO , climate was unstable and obviously fluctuated. In Late Holocene, the temperature fluctuated regularly, and this was very coincident with the record in historical data.

宁晋泊沉积物的环境指标高分辨率分析,揭示了全新世温暖期以来气候变化规律和湖泊演化过程。全新世温暖期早期,气候温暖,降水丰沛,环境稳定,湖泊水草茂美;其中在5500~6000aBP有一个短暂的降温过程;温暖期晚期,气候波动明显。全新世晚期,气候呈规律性波动,与华北地区文史资料一致,具有良好的可比性。

Nansihu Lake, composed of Weishanhu Lake, Zhaoyanghu Lake, Nanyanghu Lake and Dushanhu Lake, is the largest lake in North China. In this paper some environmental indexes of sediments from Nansihu Lake, such as lithology, sedimentation rate, magnetic susceptibility, TOC (total organic carbon) , TN( total nitrogen), C/N and fossil pigment, were analyzed. The study shows that .sedimentary difference between north and south Nansihu Lake occurred at 0.62 ka BP. Before 2.45 ka BP, fossil pigment was not found in sediments,...

Nansihu Lake, composed of Weishanhu Lake, Zhaoyanghu Lake, Nanyanghu Lake and Dushanhu Lake, is the largest lake in North China. In this paper some environmental indexes of sediments from Nansihu Lake, such as lithology, sedimentation rate, magnetic susceptibility, TOC (total organic carbon) , TN( total nitrogen), C/N and fossil pigment, were analyzed. The study shows that .sedimentary difference between north and south Nansihu Lake occurred at 0.62 ka BP. Before 2.45 ka BP, fossil pigment was not found in sediments, and C/N was obviously high and even reached 60 - 80, characteristic of fluvial facies. The period from 2.45 - 1.3 ka BP was the period of forming Nansihu, reflected by abrupt increase of pigment content, and corresponding change of other environmental indexes. Nansihu Lake was stable during 1.3 ka BP to 0.62 ka BP. After 0.62 ka BP, Dushanhu Lake in the north of Nansihu Lake was more like a river, while Weishanhu Lake in the south was a lake. Sedimentary characteristics showed above will be the basis of reconstructing the evolution history of Nansihu Lake, determining the level and scope of influence of the Yellow River flooding in this area and investigating the intensity of human activity in this area.

南四湖是华北地区最大的淡水湖泊,其形成演化与黄河泛滥、开挖运河、蓄水济运和泄洪保运等自然和人为的因素密切相关.本文对南四湖沉积物环境指标,如岩性、沉积速率、沉积物磁化率、总有机碳、总氮及碳氮比(C/N)和色素等进行了分析.结果表明0.62 ka BP前,南四湖南部微山湖和北部独山湖沉积物各环境指标同步变化,0.62 ka BP后,南四湖南北环境分异.3000年来该地区古环境变化经历下列过程:2.45 ka BP前有河流沉积环境的特点:色素指标为零,C/N比值高达60~80等;2.45 ka~1.3 ka BP,2.45 ka BP前后色素指标迅速上升,表明为还原环境,叶绿素及其衍生物、总类胡萝卜素保存较好C/N比值下降,内源有机质增加,频率磁化率升高,沉积的细颗粒成分增加,为南四湖形成发展时期;1.3 Ka~0.62 Ka BP,CD,TC大幅度下降,而颤藻黄素、蓝藻叶黄素变化不大,藻类繁盛,表明这一时期水体较稳定;0.62 ka BP后,独山湖更多地接受入湖河流带来的碎屑物质,沉积速率加快,环境指标更具有河流环境的特点,而微山湖仍受黄泛影响,更具有湖相特点.上述南四湖南北沉积差异,将为分析研究南...

南四湖是华北地区最大的淡水湖泊,其形成演化与黄河泛滥、开挖运河、蓄水济运和泄洪保运等自然和人为的因素密切相关.本文对南四湖沉积物环境指标,如岩性、沉积速率、沉积物磁化率、总有机碳、总氮及碳氮比(C/N)和色素等进行了分析.结果表明0.62 ka BP前,南四湖南部微山湖和北部独山湖沉积物各环境指标同步变化,0.62 ka BP后,南四湖南北环境分异.3000年来该地区古环境变化经历下列过程:2.45 ka BP前有河流沉积环境的特点:色素指标为零,C/N比值高达60~80等;2.45 ka~1.3 ka BP,2.45 ka BP前后色素指标迅速上升,表明为还原环境,叶绿素及其衍生物、总类胡萝卜素保存较好C/N比值下降,内源有机质增加,频率磁化率升高,沉积的细颗粒成分增加,为南四湖形成发展时期;1.3 Ka~0.62 Ka BP,CD,TC大幅度下降,而颤藻黄素、蓝藻叶黄素变化不大,藻类繁盛,表明这一时期水体较稳定;0.62 ka BP后,独山湖更多地接受入湖河流带来的碎屑物质,沉积速率加快,环境指标更具有河流环境的特点,而微山湖仍受黄泛影响,更具有湖相特点.上述南四湖南北沉积差异,将为分析研究南四湖的演化历史,确定该地区黄泛的影响程度和范围,为判别3000年来该地区人类活动的强度和对湖泊发展的影响提供依据.

Based on features of environmental indexes of sediments from ZK2 core located in Meijiazhou (116°12′50″E,29°04′30″N),the formation and development of Meijiazhou and its historic significance in Poyanghu Lake has been discussed.Meanwhile,based on hydrological and silt characteristics obtained in recent years in Hukou area,submerged topographic data of 1970 and 1980 and the growing trend of Meijiazhou has been noticed.Around 2.3 ka B.P.,with the joint action of Yangtze River and ancient Ganjiang River,the Meijiazhou...

Based on features of environmental indexes of sediments from ZK2 core located in Meijiazhou (116°12′50″E,29°04′30″N),the formation and development of Meijiazhou and its historic significance in Poyanghu Lake has been discussed.Meanwhile,based on hydrological and silt characteristics obtained in recent years in Hukou area,submerged topographic data of 1970 and 1980 and the growing trend of Meijiazhou has been noticed.Around 2.3 ka B.P.,with the joint action of Yangtze River and ancient Ganjiang River,the Meijiazhou was formed as the levee to the south bank of Yangtze River.It resisted the water from ancient Ganjiang River to flow into Yangtze River,resulted in the formation of Poyanghu Lake and its enlargement southward.After comparing submerged topographic data of 1970 with that of 1980,we found that the Meijiazhou is growing 0.031 m high annually and to the right bank and lower reaches continuously.The continuous growth of the Meijiazhou intensifies the resistant effect to water from Poyanghu Lake,and it will change the hydrological and geological condition of Poyang Lake further,bringing a series of environmental changes.

根据鄱阳湖口梅家洲东南缘钻孔 (ZK2 )沉积物环境指标特征 ,结合历史资料对梅家洲的形成与发展及其在历史时期对鄱阳湖的影响进行了探讨。随着古长江不断南迁 ,在长江与古赣江的共同作用下 ,2 .3kaBP前后 ,在长江南岸湖口地区形成天然堤 ,即梅家洲。它的出现对古赣江来水产生阻水 ,导致了鄱阳湖形成并向南扩张。对比 1970年和 1980年湖口地区水下地形图 ,发现梅家洲仍在不断加积 ,其对鄱阳湖的阻水作用更加明显 ,将引起鄱阳湖湖区沉积环境的改变 ,给鄱阳湖带来生态环境等多方面的影响。

 
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