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^(137)Cs Redistribution in Thin Stony Soil of a Carbonate Rock Slope in Southwest china

Pedosphere 2011年第1期21卷 37-45页

作者： LI Hao zhang Xin-Bao WANG Kc-Lin wen An-Bang institute of mountain hazards and environment Chinese Academy of Sciences Chengdu 610041 (China) Graduate University Chinese Academy of Sciences Beijing 100049 (China) State Key Laboratory of environmental Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 (China) institute of Subtropical Agriculture Chinese Academy of Sciences Changsha 410125 (China)

The fallout radionuclide cesium-137(137 Cs) has been widely employed as a tracer for assessment of soil loss from thick uniform soils;however,few studies have been conducted on thin stony soils on slopes underlain by carbonate rocks which are widely distributed in karst *** derived from 137 Cs measurement of soil samples collected along a carbonate rock slope with thin stony soil where neither soil erosion nor deposition occurred was used to investigate the characteristics of 137 Cs redistribution in a karst area of Southwest *** results indicated that the 137 Cs inventories of the surface soil on the slope studied were much lower than that of the local 137 Cs reference inventory and the 137 Cs activities were much higher than those on slopes with thick uniform *** spatial distribution of 137 Cs inventories was characterized by considerable *** high 137 Cs depletion in the stony soil of the slope studied was mainly because a considerable proportion of the fallout input of 137 Cs could be lost with runoff and the dissolution of carbonate particles in the soil promoted the loss of 137 *** demonstrated that the rates of soil loss could not be estimated from the degree of depletion of the 137 Cs inventory relative to the local reference inventory for the thin stony soil of the rocky slope underlain by carbonate rocks in the study area in the way that has been widely used in areas with thick uniform soils.

关键词： carbonate dissolution, ^137Cs fallout, ^137Cs inventory karst area runoff

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A study on responses of soil erosion and sediment yield to closing cultivation on sloping land in a small catchment using 137Cs technique in the Rolling Loess Plateau,china

A study on responses of soil erosion and sediment yield to c...

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中国科学院地质与地球物理研究所2003学术年会

作者： feng mingyi~(1,4),d.e.walling~3,zhang xinbao~(1,2) & wen anbang~1 1.chengdu institute of mountain hazards and environment,chinese academy of sciences(CAS).chengdu 610041.china 2.State Key Laboratory of Loess and Quaternary Geology.institute of earth environment,CAS,Xi’an 710075.china 3.department of Geography and Archaeology.exeter University,exeter eX4 4RJ.UK 4.Sichuan Teachers College.Nanchong 637002.china

By comparison of volumes and Cs contents of the deposited sediments before and after 1993,changes of specific sediment yields and relative sediment contributions from the gully area and from the inter gully area after closing cultivation on the later area on a small catchment of Zhaojia Gully,in the Rolling Loess Plateau,are analyzed in this *** cultivation in a large scale has not resulted in decrease but increase of specific sediment yield of the catchment,in sharp decrease of the sediment yield and the relative sediment contribution of the inter-gully area, and in increase of the sediment yield and the contribution of the gully area,for a short *** mean specific sediment yield of 29650 t km a of 1994-1996 in the catchment was 2.2 times the average value of 13413 t km a for a long *** specific sediment yield of the inter-gully area decreased from the 14335 t km a in 1994 to 7034 t km a in 1995 and 3517 t km a in 1996,while the yield of the gully area varied between 44944 and 62136t km a during the period of 1994-1996 which was much greater than the value of 21118 t km a before *** relative sediment contribution from the inter-gully area decreased from 23% in 1994 to 15%in 1995 and 6%in 1996,while the contribution from the gully area increased from 77%in 1994 to 85% in 1995 and 94%in *** is suggested that compacting of ploughed soils resulted in increasing of the erosion resistance but in decreasing of the precipitation infiltration,therefore, the soil erosion reduced but the runoff amount increased on the inter-gully *** of delivering runoff from the inter-gully area to the gully area should result in activeness of gully erosion and mass movements,consequently,in increase of the total sediment yield from the catchment.

关键词： Loess Plateau closing cultivation gully ara inter-gully area relative sediment contribution 137Cs

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ASSeSSMeNT OF SOIL LOSS ON UNCULTIVATed SLOPe LANd BY USING 137CS TeCHNIQUe IN THe UPPeR YANGTZe RIVeR BASIN OF china

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International Journal of Sediment Research 2004年第1期19卷 60-65页

作者： mingyi feng, xinbao zhang , anbang wen and Xiubin He china West Normal University, Nanchong 637002, e-mail: mingyifeng2004@*** State Key Laboratory of Soil and dryland Farming on Loess Plateau, IWSC, CAS, Yangling 710075 institute of mountain hazards and environment, chinese academy of sciences.chengdu 610041 china West Normal University Nanchong637002 State Key Laboratory of Soil and dryland Farming on Loess Plateau IWSC CAS Yangling 710075 institute of mountain hazards and environment Chinese Academy of SciencesChengdu 610041 institute of mountain hazards and environment Chinese Academy of SciencesChengdu 610041

Radionuclides are used as tracers of sediments in areas where no plot data or field monitoring data are not available. Caesium-137 can provide important information on both soil loss rates and sediment sources. The 137Cs technique is employed to assess soil erosion rates in forest and grass lands in the Upper Yangtze River Basin, china. The study area includes 6 forestlands and 4 grasslands in 8 counties and cities over the eastern part of the basin. The 137Cs reference inventories ranged from 620.9 Bq m-2 to 2560.3 Bq m-2. For the 6 forestlands, the average 137Cs inventory over a field ranges from 960.8 Bq m"2 to 2560.3 Bq m-2. The average erosion rate is estimated from the 137Cs measurements between 0 to 588 t km-2yr-1. For the 4 grasslands, the average 137Cs inventory ranges from 119.0 Bq m-2 to 869.7 Bq m-2. The average rate of erosion from grassland varies from 0 to 4435 t km-2 yr-1. Where the erosion was more severe, the 137Cs inventory was lower. The results showed that there is no clear relation

关键词： erosion rate Uncultivated land 137 Cs technique Upper Yangtze River

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5·12四川汶川地震次声波

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山地学报 2009年第5期27卷 637-640页

作者：章书成余南阳中国科学院水利部成都山地灾害与环境研究所西南交通大学机械学院

dFW-ⅠⅢ型泥石流次声警报器完整地记录了5·12汶川8.0级地震及以后多次>3.0级余震的地震次声波资料。分析表明,此地震次声波为一确定性信号,卓越频率为2～3Hz,其声压随地震震级而变,5·12地震时的声压>40Pa。记录的5·12强震时间较之... 详细信息

dFW-ⅠⅢ型泥石流次声警报器完整地记录了5·12汶川8.0级地震及以后多次>3.0级余震的地震次声波资料。分析表明,此地震次声波为一确定性信号,卓越频率为2～3Hz,其声压随地震震级而变,5·12地震时的声压>40Pa。记录的5·12强震时间较之公布的地震发生时间提前约1min。希望地震次声波能引起相关研究者的兴趣和重视,并进一步探索相关的机理。

关键词： 5·12地震地震次声波频谱

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Climate-Vegetation Coverage Interactions in the Hengduan mountains Area, Southeastern Tibetan Plateau, and Their downstream effects

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Advances in Atmospheric sciences 2024年第4期41卷 701-716页

作者： Congxi FANG Jinlei CHeN Chaojun OUYANG Lu WANG Changfeng SUN Quan zhang Jun wen Key Laboratory of mountain hazards and earth Surface Processes Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610299China State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China College of Urban and environmental sciences Peking UniversityBeijing 100871China institute of Global environmental Change Xi’an Jiaotong UniversityXi’an 710049China The State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi’an 710061China College of Atmospheric sciences Chengdu University of Information TechnologyChengdu 610225China

Little is known about the mechanism of climate-vegetation coverage coupled changes in the Tibetan Plateau(TP)region,which is the most climatically sensitive and ecologically fragile region with the highest terrain in the *** study,using multisource datasets(including satellite data and meteorological observations and reanalysis data)revealed the mutual feedback mechanisms between changes in climate(temperature and precipitation)and vegetation coverage in recent decades in the Hengduan mountains Area(HMA)of the southeastern TP and their influences on climate in the downstream region,the Sichuan Basin(SCB).There is mutual facilitation between rising air temperature and increasing vegetation coverage in the HMA,which is most significant during winter,and then during spring,but insignificant during summer and *** temperature significantly enhances local vegetation coverage,and vegetation greening in turn heats the atmosphere via enhancing net heat flux from the surface to the *** atmospheric heating anomaly over the HMA thickens the atmospheric column and increases upper air *** high pressure anomaly disperses downstream via the westerly flow,expands across the SCB,and eventually increases the SCB *** effect lasts from winter to the following spring,which may cause the maximum increasing trend of the SCB temperature and vegetation coverage in *** results are helpful for estimating future trends in climate and eco-environmental variations in the HMA and SCB under warming scenarios,as well as seasonal forecasting based on the connection between the HMA eco-environment and SCB climate.

关键词： Hengduan mountains Area normalized difference vegetation index climate change net heat flux downstream effects

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Fingerprinting the sources of water-mobilized sediment threatening agricultural and water resource sustainability:Progress, challenges and prospects in china

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Science china earth sciences 2019年第12期62卷 2017-2030页

作者： Qiang TANG Bojie FU anbang wen xinbao zhang Xiubin He Adrian LCOLLINS Sustainable Agriculture sciences department Rothamsted ResearchNorth WykeOkehamptonDevon EX202SBUK Key Laboratory of mountain Surface Processes and ecological Regulation Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610041China State Key Laboratory of Urban and Regional ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China State Key Laboratory of earth Surface Processes and Resource ecology Faculty of Geographical ScienceBeijing Normal UniversityBeijing 100875China

Sediment source fingerprinting apportions the sources of sediment produced by water erosion by linking sampled sediment mixtures and landscape source materials using diagnostic and conservative *** this approach,the nature and location of active sediment sources across the catchment can be elucidated,generating information which is a key prerequisite for the design and implementation of catchment management *** science of sediment source fingerprinting continues to attract much research globally,but to date,there have been relatively few fingerprinting studies in ***,there remain major challenges for the fingerprinting approach arising from the uniqueness of chinese landscapes,including for instance,the complex land use configuration with highly fragmented or mosaic patches and the highly dynamic land use conversion rates,generating a need to test the physical basis for the discriminatory power and environmental behavior of both traditional and novel *** research is needed to investigate the applicability of tracer properties in different physiographic settings and to evaluate the potential strategic utility of the approach for supporting the improved management of soil and water ***,the strategic availability of independent observation data for different components of catchment sediment budgets and well-maintained research infrastructure for plots,micro-catchments and drainage basins provides immediate opportunity for testing the approach and refining *** detailed testing across scales would be invaluable for promoting sediment source fingerprinting as both a scientific and management tool for informing soil and water conservation practices in china.

关键词： Soil erosion Sediment source fingerprinting Tracer properties Sediment budgets Catchment management china

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^(137)Cs and^(210)Pb_(ex) as Soil erosion Tracers in the Hilly Sichuan Basin and the Three Gorges Area of china

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Journal of mountain Science 2012年第1期9卷 27-33页

作者： SHI Zhonglin wen anbang zhang xinbao He Xiubin LI Hao YAN dongchun Key Laboratory of mountain Surface Processes and ecological Regulation Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610041China Graduate University of chinese academy of sciences Beijing 100049China College of Resources and environment Sichuan Agricultural UniversityYa'an 625014China

Accelerated soil erosion and land degradation represent major environmental problems for agricultural *** information on the rates of soil loss is urgently *** traditional techniques for documenting rates of soil loss may meet this need,but face many *** fallout radionuclides,especially 137 Cs and 210 Pb ex,are increasingly used as effective tracers to quantify soil erosion rates,and they represent a valuable complement to the existing classical *** paper aims to introduce the basis for assessing soil erosion rates on cultivated and uncultivated slopes by using 137 Cs and 210 Pb ex measurements,to compare the 137 Cs and 210 Pb ex reference inventories,and to report several case studies undertaken in the hilly area of Sichuan Basin and the Three Gorges area of china.

关键词： Soil erosion Cultivated land 137 Cs 210 Pb ex Uncultivated land Sichuan Basin Three Gorges area china

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微水造林,建设攀枝花市视野区常绿森林植被

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水土保持学报 2001年第4期15卷 6-9页

作者：张信宝杨忠文安邦向国喜雷彻虹中国科学院水利部成都山地灾害与环境研究所成都610041 攀枝花市林业科学研究所

攀枝花市地处金沙江干热河谷 ,视野区荒山植被建设 ,多年来一直采用雨养造林的技术路线 ,未能改变“雨季郁郁葱葱 ,旱季一片枯黄”的稀树草原植被景观。干热河谷森林植被难以恢复的主要原因是旱季干旱缺水。微水造林是采用微型水利工程... 详细信息

攀枝花市地处金沙江干热河谷 ,视野区荒山植被建设 ,多年来一直采用雨养造林的技术路线 ,未能改变“雨季郁郁葱葱 ,旱季一片枯黄”的稀树草原植被景观。干热河谷森林植被难以恢复的主要原因是旱季干旱缺水。微水造林是采用微型水利工程措施 ,拦蓄雨季径流 ,改善坡地旱季土壤水分状况 ,造林育林。视野区山地山高坡长 ,毛支沟发育 ,雨季洪水径流充沛 ,非常适合采用微水造林的技术路线 ,营造四季常青的南亚热带常绿森林植被。

关键词：干热河谷微水造林常绿森林植被攀枝花

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基于GIS的干热河谷植被恢复分区研究——以攀枝花城市视野区为例

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水土保持学报 2003年第6期17卷 118-120页

作者：何锦峰杨忠冯明义张信宝中国科学院水利部成都山地灾害与环境研究所四川成都610041

以攀枝花视野区为例,研究了基于GIS的干热河谷区植被恢复适宜性评价及分区方法。在干热河谷植被恢复适宜性评价及分区中,主要考虑对植被类型及植物生长影响较大的海拔高度、坡向、坡度、岩土类型、土层厚度等因素,并采用专家评分法给各... 详细信息

以攀枝花视野区为例,研究了基于GIS的干热河谷区植被恢复适宜性评价及分区方法。在干热河谷植被恢复适宜性评价及分区中,主要考虑对植被类型及植物生长影响较大的海拔高度、坡向、坡度、岩土类型、土层厚度等因素,并采用专家评分法给各影响因子权重和适宜性评价赋值。经过GIS的数据处理、空间分析、模型建立及运算,得到植被恢复适应性评价图,再经过分类、合并,将攀枝花市视野区划分为适宜区、较适宜区、较不适宜区、不适宜区、极不适宜区,得到植被恢复分区图。

关键词： GIS 干热河谷植被恢复适宜性评价

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黄土峁坡耕地土壤侵蚀与泥沙输移

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山地研究 1995年第2期13卷 85-90页

作者：文安邦张信宝张一云徐家云白立新中国科学院四川联合大学物理系

运用２０世纪五六十年代大气核试验所产生的人工放射性同位素￣（１３７）Ｃｓ为示踪元素，分析了陕西省子长县黄土峁玻耕地￣（１３７）Ｃｓ的坡面分布特征，计算出该坡耕地土壤侵蚀模数６３８０—８８９０ｔ／［（ｋｍ）￣２·ａ］；... 详细信息

运用２０世纪五六十年代大气核试验所产生的人工放射性同位素￣（１３７）Ｃｓ为示踪元素，分析了陕西省子长县黄土峁玻耕地￣（１３７）Ｃｓ的坡面分布特征，计算出该坡耕地土壤侵蚀模数６３８０—８８９０ｔ／［（ｋｍ）￣２·ａ］；坡地底部剖面６和剖面１４的土壤堆积速率分别为２８０和４２３０（ｔ／［（ｋｍ）￣２·ａ］；该坡地剖面线１和剖面线２方向上的泥沙输移比０．９６。

关键词：黄土峁坡耕地土壤侵蚀泥沙输移

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