维普中文期刊产品整合服务
58篇 您的检索式:作者名="Chihua"
    题名 作者 年代 出处 被引量
1交替冻融对坡面产流产沙的影响显示文摘冻融作用使土壤更容易成为侵蚀的物质来源,进而加剧土壤侵蚀程度。为了揭示冻融作用对坡面土壤水蚀的影响,该文通过室内交替冻融循环试验和人工模拟降雨试验,研究了交替冻融作用下坡面的降雨产流产沙特征。试验以未经过任何冻融作用的风干土壤为对照,设计了2种交替冻融循环周期处理(3和6)、2种土壤质量含水率水平(10%和20%)、4种降雨强度(25、50、75、100 mm/h)。结果表明,相对于对照,降雨强度相同时,2种土壤含水率下的交替冻融作用都可以使产流产沙强度增大,且产沙强度的增大幅度大于产流强度。交替冻融循环周期相同时,各降雨强度下的产流产沙强度随含水量的增加而增加。质量含水率相同时,各降雨强度下的产流产沙强度随冻融循环周期的变化相对较为复杂,当质量含水率为10%时,产流产沙强度随冻融循环周期的增加而增大,当质量含水率为20%时,产流产沙强度随冻融循环周期的增加而减小。当质量含水率为10%,交替冻融循环周期为3和6时,增流百分比分别为3.52%、4.71%,增沙百分比分别为6.13%、16.95%。当质量含水率为20%,交替冻融循环次数为3和6时,增流百分比分别为10.24%、5.01%,增沙百分比分别为81.99%、53.07%。相同降雨强度下,土壤质量含水率对产流产沙强度的影响大,交替冻融作用对产流产沙强度的影响小。该研究为冻融侵蚀机理的研究提供参考依据。魏霞 李勋贵 Huang Chihua 2015农业工程学报2015,31,13:19
2降雨-径流条件下土壤溶质迁移过程模拟显示文摘通过雨滴的打击加速土壤表面溶质迁移至地表径流过程。通过设计3种水文条件即控制排水状态(-5cm)、土壤水分饱和状态和土壤渗流状态(5cm),采用人工模拟3种降雨强度(30、60和90mm/h),及同时外加模拟相对于降雨量的0、2、4和10倍径流量,研究土壤溶质迁移到地表径流过程中扩散过程的规律。试验结果表明降雨强度、或地表径流总量、或地表水位线的增加,均加速土壤溶质的扩散过程。渗流作用下,对流-扩散作用存在着一种交互作用,能加速分子扩散过程。土壤溶质迁移过程同降雨强度、地表径流量和地下水位高低有着重要关系。田坤 Huang Chihua 王光谦 田鹏 傅旭东 郭海丹 2011农业工程学报2011,27,4:11
3土壤溶质迁移至地表径流过程的室内模拟试验显示文摘关于土壤溶质迁移到地表径流,现有研究大多是概念性的认识,对迁移过程中各个部分的定量研究却很少。该文为了量化研究土壤溶质迁移流失过程及其作用机理,通过设计2种水文条件即土壤水分饱和和土壤渗流条件,其中土壤渗流条件设置了2种水头(5cm,10cm),采用人工模拟5组不同地表径流流速,分别研究土壤溶质迁移到地表径流过程中4种途径:土壤侵蚀、伯努利效应、扩散和对流。试验结果表明了伯努利效应导致土壤溶质迁移量增加;特别是在土壤水分饱和条件下,当地表径流流速从55mL/s升到200mL/s时,伯努利效应引起的土壤溶质流失通量占总流失通量的比例从14%升到53%,在土壤水分饱和条件下,混合层深度小于5mm;但是在土壤渗流条件下,混合层深度随着水头的高低和径流流速的大小而变化。土壤溶质迁移过程同地表径流流速和地下水位高低有着重要关系。田坤 Huang Chihua 张广军 2009农业工程学报2009,25,11:8
4A Cretaceous Desert-Playa Sedimentary System Controlled the Potash Formation in the Simao Basin显示文摘Objective The Simao Basin in Yunnan Province has developed Cretaceous evaporite-bearing clastic deposits,including the Mangang and Mengyejing Formations which were originally interpreted as fluvial and lacustrine deposits.The Mangang Fm.composed of well-rounded quartz sandstones,were commonly considered as the bottom part of the Mengyejing salt series.During last decades,drilling projects targeting to prospect solid potash deposits in the Mengyejing salt series consequently ceased when encountering these sandstones.The poor understanding of sedimentary environments leads to no breakthrough of prospecting solid potash deposits in the Simao Basin.WU Chihua LIU Chenglin SHEN Lijian WANG Jiuyi ZHANG Hua 2017Acta Geologica Sinica(English Edition)2017,91,3:6
5玉米茎秆汁液防治坡面土壤侵蚀的室内模拟试验显示文摘该文通过室内人工模拟降雨试验,研究了地表施加玉米茎秆汁液对降雨产流产沙强度的影响,旨在探索玉米茎秆汁液是否可以作为土壤改良剂来减少产流产沙强度。试验设计了2种玉米茎秆汁液的施加量(400和800 g)、4种施加浓度(10%、25%、50%和75%)和4种降雨强度(50、25、75、100 mm/h)。结果表明,各施加浓度和施加量的玉米茎秆汁液都能够减少降雨产流产沙强度,且相同条件下的产沙强度减小程度大于产流强度减小程度。当玉米茎秆汁液的施加量为400 g时,随着施加浓度从10%增加至25%、50%和75%,减流百分比分别为31.243%、31.685%、34.595%和39.475%,减沙百分比分别为23.167%、41.993%、37.918%和64.606%;当玉米茎秆汁液的施加量为800 g时,随着施加浓度从10%增加至25%、50%、75%,减流百分比分别为37.583%、56.433%、63.170%和76.360%,减沙百分比分别为48.214%、77.219%、88.572%和95.539%。当施加量和降雨强度相同时,产流产沙强度与施加浓度之间呈显著的指数函数递减关系,产沙强度随降雨强度的变化呈显著的幂函数递增关系。当施加量为400 g时,各施加浓度下的产流强度与降雨强度之间呈显著的线性函数递增关系,当施加量为800 g时,各施加浓度下的产流强度随降雨强度呈显著的指数函数递增关系。研究为水力侵蚀的防治提供了新思路,为水蚀荒漠化的防治提供了新方法。魏霞 李勋贵 Huang Chihua 2015农业工程学报2015,31,11:6
6降雨-径流条件下混合层深度模拟试验显示文摘混合层深度是非点源污染模型中一个重要参变量,在模拟土壤溶质随地表径流迁移流失过程中,它决定了参与径流迁移的土壤溶质的范围及其具体流失量,为现有模型参数校正提供一定的数据支持。通过设计3种水文条件即自由排水状态(-5cm)、土壤水分饱和状态和土壤渗流状态(5cm),采用人工模拟3种降雨强度(3,6和9cm/h),及同时分别外加模拟相对于降雨量的0,2,4和10倍径流量,研究土壤溶质迁移到地表径流过程中混合层深度。试验结果表明混合层深度与降雨强度呈线性增加关系;自由排水条件下,与地表径流量呈复杂正比例增加关系;土壤饱和条件和土壤渗流条件下,混合层深度与地表径流量均呈线性增加关系。研究结果发现混合层深度的实质是一个多向、复杂的动态溶质迁移变化量。田坤 Huang Chihua 田鹏 王光谦 傅旭东 2011农业工程学报2011,27,11:5
7Plateau archives of lithosphere dynamics,cryosphere and paleoclimate:The formation of Cretaceous desert basins in east Asia显示文摘Southeastern Eurasia is a global window to the Cretaceous paleoclimate and lithosphere coupling.China contains one of the most complete and complex sedimentary records of Mesozoic desert basins on planet Earth.In this study,we perform the spatio-temporal tracking of 96 Cretaceous palaeoclimate indicators during 79 Myr which reveal that the plateau paleoclimate archives from East Asia resulted from an Early to Mid-Cretaceous ocean–atmosphere coupling and a shift to a preponderant role of Late Cretaceous lithosphere dynamics and tectonic forcing on high-altitude depositional systems linked to the subduction margins of the Tethys and Paleo-Pacific realms beneath the Eurasian plate.The crustal response to tectonic processes linked with the spatio-temporal evolution of the Tethyan and Paleo-Pacific margins defined the configuration of major sedimentary basins on this region.The significant increase and decrease in the number of active sedimentary basins that occur during the Cretaceous,from 16 in the Early Cretaceous,to 28 in the Mid-Cretaceous,and a decreasing to 20 sedimentary basins in the Late Cretaceous,is a direct response of lithospheric dynamics associated with the two main subduction zones(Tethys and Pacific domains).A shift in subduction style from an Early Cretaceous Paleo-Pacific Plate slab roll back to a Late Cretaceous flat-slab mode might have triggered regional plateau uplift,blocked intraplate volcanism,thus enhancing the denudation and sediment availability,and created wind corridors that led to the construction and accumulation of extensive Late Cretaceous aeolian sandy deserts(ergs)that covered Mid-Cretaceous plateau salars.At the same time,plateau uplift associated with crustal thickening following terrane assembly in the Tethyan margin triggered altitudinal cryospheric processes in sandy desert systems.Evidence of an active Cretaceous cryosphere in China include ValanginianHauterivian glacial debris flows,Early Aptian geochemical signature of melt waters from extensive ice sheets,and Cenomanian–Turonian ice-rafted debris(IRD).These cryospheric indicators suggest an already uplifted plateau in southeastern Eurasia during the Cretaceous,and the marked correlation between cold plateau paleoclimate archives and marine records suggests a strong ocean-atmosphere coupling during Early and Mid-Cretaceous cold snaps.We thus conclude that lithospheric tectonics during Cretaceous played a fundamental role in triggering high-altitude basin desertification and spatiotemporal plateau paleohydrology variability in the Cretaceous of south-eastern Eurasia.Chihua Wu Juan Pedro Rodríguez-López M.Santosh 2022Geoscience Frontiers2022,13,6:3
8土壤溶质迁移过程的试验研究显示文摘设计了自由排水、土壤水分饱和和壤中流3种水文条件,采用人工模拟5组不同地表径流流速,分别对土壤溶质迁移到地表径流过程中土壤侵蚀、伯努利效应、扩散和对流4种途径的作用机理进行了分析。结果表明,在土壤水分饱和条件下,伯努利效应引起的土壤溶质流失量占总流失量的比例很大。结合混合层理论和试验得到了3种水文条件下混合层的深度,其中自由排水(-10 cm)时混合层深度小于1.5 mm;在土壤水分饱和条件下,混合层深度介于0.9~4.5 mm;但是在壤中流条件下,混合层表现为整个土层都为混合层深度。田坤 Chihua HUANG 张广军 郑粉莉 2009水土保持学报2009,23,3:3
9Surgical Management and Prognostic Factors of Hilar Cholangiocarcinoma: Experience with 115 Cases in China显示文摘Liu Yubin PhD Fang Chihua PhD Jian Zhixiang MM Ou Jinrui BA Liu Zixian BA Zheng Jianghua BA Lin Ye MD Jin Haosheng MD Lu Chaomin PhD 2008Annals of Surgical Oncology2008,,8:2
10Surgical prognostic factors of hilar cholangiocarcinoma: experience with 115 cases in China显示文摘YUBIN L CHIHUA management and F ZHIXIANG J 2008Ann Surg Oncol2008,15,8:1
11Effects of near-surface hydraulic gradients on nitrate and phosphorus losses in surface runoff显示文摘Zheng Fenli Huang Chihua Darrel norton L 2004Journal of Environment Quality2004,33,6:1
12China plans to curb cervical cancer显示文摘Chihua Wen 2005Lancet Oncology2005,6,3:1
13A colony blot immunoassay for the rapid identification of Bacillus cereus显示文摘CHIHUA C HWIACHENG D 2004J Food Protect2004,67,2:1
14Effects of soil surface hydraulic conditions on nitrate and phosphorus losses in surface runoff 显示文摘Zheng Fenli Huang Chihua Darrell N L 2004Environment Quality2004,33,6:1
15A nora contact laser system for measuring soil surface topogra- phy显示文摘Huang Chihua White I Thwaite E G 1988Soil Science Society of America Journal1988,52,3:1
16A colony blot immunoassay for the rapid identification of Bacillus cereus 显示文摘CHIHUA C HWIACHENG D 2004J Food Protect2004,67,2:1
17Surgical management and prognostic factors of hilar cholangiocarcinoma:experience with 115 cases in China 显示文摘Yubin L Chihua F Zhixiang J 2008Ann Surg Oneol2008,15,8:1
18An instantaneous-profile laser scanner to measure soil surface microtopography 显示文摘Darboux F Huang Chihua 2003Soil Science Society of America Journal2003,67,1:1
19A noncon- tact laser system for measuring soil surface topography 显示文摘Huang Chihua White I Thwaite E G 1988Soil Science Society of America Journal1988,52,2:1
20Evaluation of the detachment-transport coupling concept in the WEPP rill erosion equation显示文摘Huang Chihua Bradford J M Laflen J M 1996Soil Sci Soc Am J1996,60,:1
返回顶部 每页显示:
共3页 首页 上一页 第1页 下一页 末页 /3 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费