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Characteristics of river discharge and its indirect effect on the tidal bore in the Qiantang River, China

International Journal of Sediment Research 2023年第2期38卷 253-264页

作者： cunhong pan Qiushun Wang Dongzi pan Chengfei Hu Zhejiang Institute of Hydraulics and Estuary Zhejiang Provincial Key Laboratory of Estuary and Coast

Based on field data of river discharge, tide, tidal bore, and riverbed topography, the characteristics of river discharge, the effect of river discharge on riverbed erosion and sedimentation, and the feedback effect of riverbed erosion and sedimentation on the tide and tidal bore in the Qiantang River are analyzed. The results show that the inter-annual and seasonal variation of river discharge in the Qiantang River is noticeable, while the seasonal distribution of river discharge tends to be uniform after the construction of Xin’anjiang Reservoir. River discharge has a major effect on the erosion and sedimentation in the reach from Zhakou to Yanguan. There are laws of riverbed erosion in wet seasons and years and sedimentation in dry seasons and years. Relations in the Zhakou to Yanguan reach among the riverbed volume after the flood season, the mean and maximum river discharge during the flood season, and riverbed volume before the flood season are established. With the riverbed erosion from Zhakou to Yanguan, the low tide level decreases and the tidal range is amplified, and thus, the tidal bore is enhanced. The relation among tidal range, river discharge, and riverbed volume, as well as the one between the tidal bore height and tidal range is established on the basis of the field data. Furthermore, the variation range of tidal bores after the flood season is analyzed in wet and dry years. The indirect effect of the Xin’anjiang Reservoir on the height of the tidal bore is predicted and the mean height of the tidal bore from Zhakou to Yanguan decreases by 0.1-0.2 m.

关键词： Qiantang River Tidal bore Tide River discharge Riverbed erosion Riverbed sedimentation

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Experimental investigation on the wave-induced pore pressure around shallowly embedded pipelines

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Acta Oceanologica Sinica 2007年第5期26卷 125-135页

作者： pan Dongzi WANG Lizhong pan cunhong HU Jinchun Zhejiang Institute of Hydraulics and Estuary Hangzhou 310020 China College of Civil Engineering and Architecture Zhejiang University Hangzhou 310027 China

A series of regular wave experiments have been done in a large-scale wave flume to investigate the wave-induced pore pressure around the submarine shallowly embedded pipelines. The model pipelines are buried in three kinds of soils, including gravel, sand and silt with different burial depth. The input waves change with height and period. The results show that the amplitudes of wave-induced pore pressure increase as the wave period increase, and decay from the surface to the bottom of seabed. Higher pore pressures are recorded at the pipeline top and the lower pore pressures at the bottom, especially in the sand seabed. The normalized pressure around pipeline decreases as the relative water depth, burial depth or scattering parameters increase. For the silt seabed, the wavelet transform has been successfully used to analyze the signals of wave - induced pore pressure, and the oscillatory and residual pore pressure can be extracted by wavelet analysis. Higher oscillatory pressures are recorded at the bottom and the lower pressures at the top of the pipeline. However, higher residual pressures are recorded at the top and the lower pressures at the bottom of the pipeline.

关键词： ocean engineering model test submarine pipeline pore pressure wavelet analysis

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Fine mapping of an incom-plete recessive gene for leaf rolling in rice (Oryza sativa L.)

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Chinese Science Bulletin 2005年第21期50卷 2466-2472页

作者： SHAO Yuanjia pan cunhong CHEN Zongxiang ZUO Shimin ZHANG Yafang pan Xuebiao Key Laboratory of Plant Functional Genomics of Jiangsu Province Agricultural College Yangzhou University Yangzhou 225009 China Department of Biotechnology Nantong Agricultural Vocational College of Technology Nantong 226007 China

Genetic analysis and fine mapping of genes controlling leaf rolling were conducted using two back-crossed generations (BC4F2, BC4F3) derived from a cross between QMX, a non-rolled leaf cultivar as a recurrent par-ent, and JZB, a rolled leaf NIL of ZB as a donor parent. Re-sults indicated that leaf rolling was mainly controlled by an incompletely recessive major gene, namely rl(t), and at the same time, affected by quantitative trait loci (QTLs) and/or the environment. A genetic linkage map was constructed using MAPMAKER/EXP3.0 with eight polymorphic mark-ers on chromosome 2, which were screened by BAS method from 500 SSR markers and 15 newly developed inser-tion/deletion (InDel) markers. The position of rl(t) was esti-mated with composite interval mapping (CIM) method using WinQTLcart2.5. Gene rl(t) was mapped between markers InDel 112 and RM3763, and 1.0 cM away from InDel 112 using 241 plants in BC4F2 population. To fine map rl(t), one BC4F3 line with 855 plants was generated from one semi-rolled leaf plant in BC4F2. Four new polymorphic InDel markers were developed, including InDel 112.6 and InDel 113 located between markers InDel112 and RM3763. Based on the information of recombination offered by 191 rolled leaf plants and 185 non-rolled leaf plants from the BC4F3 line ,we mapped rl(t) to a 137-kb region between markers InDel 112.6 and InDel 113. Homologous gene analysis sug-gested that rl(t) was probably related to the process of leaf development regulated by microRNA.

关键词：水稻遗传分析隐性基因优良映射基因表达

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Grain size characteristics of surface sediment and its response to the dynamic sedimentary environment in Qiantang Estuary, China

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International Journal of Sediment Research 2022年第4期37卷 457-468页

作者： Shanshan Wang cunhong pan Dongfeng Xie Mingwei Xu Yuhan Yan Xinwen Li Zhejiang Institute of Hydraulics & Estuary (Zhejiang Institute of Marine Planning and Design) College of Harbour Coastal and Offshore EngineeringHohai University

The composition and grain size characteristics of sediment in estuarine and coastal environments provide important information on the material source, hydrodynamic environment, environmental events,etc. However, few studies have focused on the sediment characteristics of the entire Qiantang Estuary,particularly, on the correlation between hydrodynamics and sediment properties. Through systematic sampling of the surface sediment in a large area of the Qiantang Estuary, the spatial distribution characteristics of the surface sediment of the Qiantang Estuary, such as the grain size composition and particle size parameters, in different sections of the estuary area are analyzed. By comparing the particle size data of different estuaries, the similarities and differences of the particle size parameters of the Qiantang Estuary and other estuaries are compared and analyzed. According to the differences in the sediment composition, the distribution status of the particle size frequency curves and the morphological characteristics of the probability curves in the entire study area, the Qiantang Estuary is divided into 7 dynamic depositional areas: Fuchunjiang Hydropower Station-Fuyang, Fuyang-Qibao, Qibao-Cao’e River, Cao’e River-Zhapu, North Shore of Hangzhou Bay, middle part of Hangzhou Bay, and South Shore of Hangzhou Bay, which are different from the previous estuary segmentation system. The study area is divided into 13 dynamic depositional sub-regions using the Pejrup M triangle diagram. Combining the calculation results of the mathematical model and the Pejrup M triangle diagram, the relation between the dynamic deposition environment and the bottom shear stress is discussed. It is found that the spatial distribution of the bottom shear stress in the study area is in good agreement with the zoning of the dynamic sedimentary environment.

关键词： Qiantang Estuary Surface sediment Grain size parameter characteristics Dynamic sedimentary environment

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Process-based modeling of morphodynamics of a tidal inlet system

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Acta Oceanologica Sinica 2010年第6期29卷 51-61页

作者： XIE Dongfeng GAO Shu pan cunhong Zhejiang Institute of Estuaries and Hydraulics Hangzhou 310020 China Ministry of Education Key Laboratory for Coast and Island Development Nanjing UniversityNanjing 210093 China

The morphodynamic evolution of an idealized inlet system is investigated using a 2-D depthaveraged process-based model,incorporating the hydrodynamic equations,Englund-Hansen’s sediment transport formula and the mass conservation *** model has a fixed geometry,impermeable boundaries and uniform sediment grain size,and driven by shore-parallel tidal *** results show that the model reproduces major elements of the inlet system,i.e.,flood and ebb tidal deltas,inlet *** is reached after several years when the residual transport gradually decreases and eventually *** equilibrium,the flow field characteristics and morphological patterns agree with the schematized models proposed by O’Brien （1969） and Hayes （1980）.The modeled minimum cross-sectional entrance area of the tidal inlet system is comparable with that calculated with the statistical P-A relationship for tidal inlets along the East China Sea *** morphological evolution of the inlet system is controlled by a negative feedback between hydrodynamics,sediment transport and bathymetric *** evolution rates decrease exponentially with time,i.e.,the system develops rapidly at an early stage while it slows down at later *** changes in hydrodynamics occur in the system;for example,the flood velocity decreases while its duration increases,which weakens the flood domination *** formation of the multi-channel system in the tidal basin can be divided into two stages;at the first stage the flood delta is formed and the water depth is reduced,and at the second stage the flood is dissected by a number of tidal channels in which the water depth increases in response to tidal scour.

关键词： tidal inlet morphological evolution sediment dynamics numerical modeling

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Isolation and characterization of rl_(t), a gene that controls leaf rolling in rice

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Chinese Science Bulletin 2014年第25期59卷 3142-3152页

作者： Lei Li Xiang Xue Zongxiang Chen Yafang Zhang Yuyin Ma cunhong pan Junkai Zhu Xuebiao pan Shimin Zuo Key Laboratory of Crop Genetics and Physiology of Jiangsu Province College of Agriculture Yangzhou University/Key Laboratory of Plant Functional Genomics of the Ministry of Education Department of Biochemical Engineering Yangzhou Polytechnic College Lixiahe Agricultural Research Institute of Jiangsu Province

Moderate leaf rolling is one of the most important morphological traits in rice breeding for plant *** studies have shown that the rl(t)gene has a high breeding potential for developing hybrid-rice varieties with an ideal ideotype,because it leads to an appropriate leaf rolling index(LRI)of about 30%in the heterozygous state,and had a positive effect on grain *** this study,we isolated rl(t)and performed a preliminary investigation of its function in regulating leaf rolling in *** sequencing identified a single base change(G to T)in the finely mapped region(11 kb)containing rl(t),and this is located in 30-untranslated region(30-UTR)of the only predicted gene,Roc5(Rice outermost cell-specific).The expression level of Roc5 is significantly higher in the rl(t)mutant than in the *** RNAi and overexpression analysis,we found that the expression level of Roc5 correlated with LRI and leaf bulliform area,and wasalso associated with leaf abaxial or adaxial *** results confirmed that Roc5 controls leaf rolling in a dosage-dependent *** analysis revealed a conserved 17-nt sequence(called the GU-rich element)in the 30-UTR of HD-GL2(Homeodomain-Glabra2)family genes including *** on the model of this element in regulating mRNA stability in mammals,we speculate that the single nucleotide change in this element accounts for the higher expression level of Roc5 in the rl(t)mutant compared to the wild-type,which ultimately leads to adaxial rolling of the *** discovery further enhances our knowledge of the molecular mechanisms underlying leaf rolling in rice.

关键词：水稻育种基因家族 RL 卷叶分离控制特性理想株型

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Characterization and evaluation of rice blast resistance of Chinese indica hybrid rice parental lines

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The Crop Journal 2017年第6期5卷 509-517页

作者： Yunyu Wu Ling Yu Ning Xiao Zhengyuan Dai Yuhong Li cunhong pan Xiaoxiang Zhang Guangqing Liu Aihong Li Lixiahe Agricultural Research Institute of Jiangsu Province Yangzhou 225009 China Jiangsu Collaborative Innovation Center for Modern Crop Production Nanjing 225009 China Jiangsu Golden Land Seed Industry Co. Ltd China

The development of resistant varieties and hybrid combinations has been the most effective and economical strategy to control blast disease caused by Magnaporthe ***, the distribution of major R genes and blast resistance characterization in hybrid rice parents has not been well investigated, resulting in their limited use in hybrid rice blast-resistance breeding. In the present study, 88 elite indica hybrid rice parental lines were evaluated with 30 isolates of M. oryzae collected from the main planting area of indica hybrid rice in China and were characterized for the presence of 11 major resistance genes using molecular markers. The pathogenicity assays showed that four types of hybrid rice parent line showed some resistance to M. oryzae. However, the proportions of highly resistant lines and the mean resistance frequency(RF) varied among the four types, with resistance in decreasing order shown by three-line restorer lines, three-line maintainer lines, two-line sterile lines, and two-line restorer lines. All 88 hybrid rice parental lines carried more than one R gene, but none carried the R genes Pi1 and Pi2. Although Pid3 and Pi9 were present only in three-line restorer lines and Pigm only in three-line maintainer lines, the remaining six R genes(Pib, Pid2, Pi5, Pia, Pi54, and Pita) were present in the four types of hybrid rice parent with significantly different distribution frequencies. The correlation between R genes and resistance reactions was investigated. The results are expected to provide useful information for rational utilization of major R genes in hybrid rice breeding programs.

关键词： Hybrid rice parental lines Magnaporthe oryzae Pi genes Resistance evaluation Molecular markers

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钱塘江河口水流-河床相互作用及对盐水入侵的影响

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水科学进展 2015年第4期26卷 535-542页

作者：潘存鸿张舒羽唐子文浙江省水利河口研究院浙江杭州310020 浙江省海洋规划设计研究院浙江杭州310020

通过长系列实测水文、地形资料分析,钱塘江河口上段河床具有大冲大淤和洪冲潮淤的演变特性,影响河口上段的潮汐强弱,进而影响盐水入侵。若年内丰水期径流量大,则河床出现"大冲",河床容积增大,潮汐增强,导致秋季强潮期盐水入侵加剧;反之... 详细信息

通过长系列实测水文、地形资料分析,钱塘江河口上段河床具有大冲大淤和洪冲潮淤的演变特性,影响河口上段的潮汐强弱,进而影响盐水入侵。若年内丰水期径流量大,则河床出现"大冲",河床容积增大,潮汐增强,导致秋季强潮期盐水入侵加剧;反之,若年内丰水期径流量小,河床容积较小,导致秋季强潮期盐水入侵减弱。结果表明,钱塘江径流对盐水入侵存在直接和间接影响:直接影响是盐水入侵与径流量成反比;间接影响是通过径流冲刷河床,引起潮汐增大,间接导致盐水入侵加剧,这是钱塘江河口大冲大淤以及对潮汐巨大反作用的特性造成的。

关键词：钱塘江河口河床冲淤盐水入侵水流-河床相互作用

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不同湍流模式下钱塘江涌潮水流三维模拟

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海洋工程 2017年第1期35卷 80-89页

作者：汪求顺潘存鸿浙江省水利河口研究院浙江杭州310020 浙江省海洋规划设计研究院浙江杭州310020 浙江省河口海岸重点实验室浙江杭州310016

钱塘江涌潮具有动力作用强和流速变化快等特点。涌潮水流紊动复杂,流速的垂向分布和紊动强度息息相关。通过涌潮水流实测资料的分析可以发现,涌潮作用下流速垂向分布在底部和上层存在差异。为研究涌潮作用下流速垂向分布的特征,应用基... 详细信息

钱塘江涌潮具有动力作用强和流速变化快等特点。涌潮水流紊动复杂,流速的垂向分布和紊动强度息息相关。通过涌潮水流实测资料的分析可以发现,涌潮作用下流速垂向分布在底部和上层存在差异。为研究涌潮作用下流速垂向分布的特征,应用基于非结构网格下有限体积法模型FVCOM对钱塘江涌潮河段水流运动进行三维数值模拟。考虑到涌潮紊动作用复杂且对流速的垂向分布起着重要影响,采用不同的湍流模式对涌潮传播过程中水流的运动特征开展研究。通过与涌潮河段实测资料的验证,复演涌潮到达前后水流运动特征,给出涌潮水流湍动能的变化过程。研究成果有助于深入认识涌潮水流紊动特征和流速的分布规律,为涌潮作用下物质输运的研究提供基础。

关键词：涌潮三维模拟湍动能钱塘江河口 FVCOM

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二维溃坝波数值模型及其应用

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水力发电学报 2010年第4期29卷 89-95页

作者：潘存鸿鲁海燕郑君于普兵浙江省水利河口研究院杭州310020

本文从Boltzmann方程出发,应用有限体积-KFVS(Kinetic Flux Vector Splitting)格式建立了基于无结构三角形网格的二维溃坝波整体数值模型,采用改进的干底Riemann解处理动边界问题。应用上述模型模拟了浙江某水库溃坝后溃坝波的传播过程... 详细信息

本文从Boltzmann方程出发,应用有限体积-KFVS(Kinetic Flux Vector Splitting)格式建立了基于无结构三角形网格的二维溃坝波整体数值模型,采用改进的干底Riemann解处理动边界问题。应用上述模型模拟了浙江某水库溃坝后溃坝波的传播过程,计算结果反映了溃坝波所到之处,水位暴涨、流速从零迅速达到极值的现象。结果表明,本文建立的二维溃坝波整体数值模型具有水量守恒、计算稳定,特别适用于强不规则地形下的溃坝波计算。

关键词：溃坝波数值模型 KFVS格式动边界三角形网格

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