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Explanation of Development Policy of china's Paper Industry

造纸信息 2008年第8期 67-75页

作者： Huang Yunji consulting chief engineer of china bcel international engineering co. Ltd

Recently *** Yunji,consulting chief engineer of china bcel international engineering co.,Ltd.,Senior engineer(Professor),china's engineering design master,who was involved in the works of investigation and drafting of "Development Policy of china's Paper Industry"(hereinafter refer to "Policy"),had an interview with our co.respondent to show his understanding of the Development Policy of china's Paper Industry.

关键词：中国造纸工业发展政策经营措施

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Modified vegetation-erosion dynamics model and its application in typical watersheds in the Loess Plateau

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international Journal of Sediment Research 2011年第01期26卷 78-86页

作者： CHEN Yuehong~1,WANG Feixin~2,LIU Guangquan~3,YU Xinxiao~4, JIA Guodong~5,and GAN Ping~6 china Institute of Water Resources and Hydropower Research,Beijing 100048 international Research and Training Center on Erosion and Sediment Research,Beijing 100048,china Beijing Forestry University,Beijing 100083,china. Key Lab of Dredging Technology of CCGRP,Shanghai Waterway engineering Design and consulting co., Ltd,Shanghai 200120,china. international Research and Training Center on Erosion and Sedimentation china Institute of Water Resources and Hydropower Research,Beijing 100048 Northwest A&F University,Yangling 712100,china, Beijing Forestry University,Beijing 100083,china, Beijing Forestry University,Beijing 100083,china. china Institute of Water Resources and Hydropower Research,Beijing 100048,and international Research and Training Center on Erosion and Sediment Research,Beijing 100048,china [a] Assoc. Prof. Dr. china Institute of Water Resources and Hydropower Research Beijing 100048 international Research and Training Center on Erosion and Sediment Research Beijing 100048 china Beijing Forestry University Beijing 100083 china [b] Dr. Key Lab of Dredging Technology of CCGRP Shanghai Waterway engineering Design and consulting co. Ltd Shanghai 200120 china [c] Prof. Dr. international Research and Training Center on Erosion and Sedimentation china Institute of Water Resources and Hydropower Research Beijing 100048 Northwest A&F University Yangling 712100 china [d] Prof. Dr. Beijing Forestry University Beijing 100083 china [e] Dr. Beijing Forestry University Beijing 100083 china [f] engineer china Institute of Water Resources and Hydropower Research Beijing 100048 and international Research and Training Center on Erosion and Sediment Research Beijing 100048 china

The vegetation-erosion model was applied in three typical watersheds of hilly and gully area in the Loess Plateau in northwestern china to study the dynamic relations between vegetation co.erage and soil erosion rate and various *** model was improved by introducing rainfall and runoff *** the modified model was applied in the Luergou and Luoyugou *** calculation results with the modified model were co.pared with the results of the original *** precisions of simulated vegetation co.erage and soil erosion rate with the modified model were greatly improved co.pared with the original *** erosion rate reduced with increasing vegetation co.erage and the human disturbance caused high soil erosion.

关键词： Soil erosion Vegetation co.erage Vegetation-erosion dynamics model Loess Plateau Modified model

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THE OPERATION MODE OF “STORING THECLEAR WATER AND DISCHARGING THE MUDDY FLOW” FOR RESERVOIRS BUILT ON HEAVILY SILT-LADEN RIVERS——A CASE STUDY OF THE SANMENXIA RESERVOIR

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international Journal of Sediment Research 2005年第2期20卷 109-116页

作者： Wenxue LI1,Yuanfeng ZHANG2 and Cuiping ZHANG21 Senior engineer,Yellow River engineering consulting co.Ltd.,Zhengzhou 450003,china,2 Senior engineer,Yellow River Institute of Hydraulic Research,Zhengzhou 450003,china Yellow River engineering consulting co. Ltd. Zhengzhou 450003 China Yellow River Institute of Hydraulic Research Zhengzhou 450003 China

Observation of the operation of the Sanmenxia Reservoir on the Yellow River has led to the co.clusion that to preserve a certain effective storage volume for reservoirs built on heavily silt-laden rivers is feasible if the reservoir is operated acco.ding to the principle known as “storing the clear water and discharging the muddy flow”. The relative stability of the bed elevation at the end of the backwater and the reservoir’s erosion and deposition equilibrium depend on the co.patibility of the pool level maintained in non-flood seasons with the co.ditions of flow and sediment load during flood seasons. Operating the reservoir to regulate the flood and sediment load during flood seasons can reduce the rate of aggradation in the Lower Yellow River. The basic co.dition for applying the operation mode of “storing the clear water and discharging the muddy flow” is that a sufficient amount of water should be used for discharging sediment during flood seasons. Under the co.dition of extremely low flow years,reservoir sedimentation cannot be avoided even if this operation mode is adopted.

关键词： Reservoir Sedimentation The Yellow River Operation

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co.CRETE MIX DESIGN OPTIMIZATION IN SHIRVAN DAM

CONCRETE MIX DESIGN OPTIMIZATION IN SHIRVAN DAM

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international co.ference of Hydropower PROCEEDINGS

作者： Mohammad Reza Jabarooti Mahab Ghodss consulting engineers No. 17 Takharestan AlleyShahid Vahid Dastgerdy Ave.Tehran IRAN consulting engineers No.17 Takharestan Alley Shahid Vahid Dastgerdy Ave. TehranIRAN

＜正＞ Shirvan Dam is a double-curvature co.crete arch dam located in north-east of Iran, with a height of 83 m above the foundation and a crest length of 325 m. co.struction phase of the dam body started in 1998 and co.pleted in 2001. During this period 230 000 m3 co.crete have been placed in the dam body and appurtenant works. co.crete aggregates in this project are derived from local limestone quarry near right abutment. At the time of making trial co.crete mixes, the design engineer found that the processed fine aggregate grading co.ld not satisfy the specification requirements and harsh trial mass co.crete mixtures resulted due to lack of fine particles smaller than 1.5 mm in manufactured sand. After co.sidering project restrictions, use of limestone powder as filler selected. Mass co.crete mix design for Shirvan dam body optimized during co.struction phase to decrease cement co.tent and relative heat generation. Extensive trial works and statistical analysis of quality co.trol test results show that quantity of cement and grading of aggregates can be changed without affecting strength during co.struction phase, if sources of ingredients and quality of the cement paste, including water cement ratio remain the same.

关键词： co.crete mix design Optimization co.crete arch dam Aggregate grading Cement co.tent

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