Surface wave attenuation by vegetation with the stem, root and canopy
作者:
He, Fei;Chen, Jie* ;Jiang, Changbo
期刊:
Coastal Engineering ,2019年152:103509 ISSN:0378-3839
通讯作者:
Chen, Jie
作者机构:
[Jiang, Changbo; He, Fei; Chen, Jie] Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha 410114, Hunan, Peoples R China.;[He, Fei] Univ Western Australia, Sch Civil Environm & Min Engn, 35 Stirling Highway, Crawley, WA 6009, Australia.;[Jiang, Changbo; Chen, Jie] Key Lab Dongting Lake Aquat Ecoenvironm Control &, Changsha 410114, Hunan, Peoples R China.;[Jiang, Changbo; Chen, Jie] Key Lab Water Sediment Sci & Water Disaster Preve, Changsha 410114, Hunan, Peoples R China.
通讯机构:
[Chen, Jie] C;Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha 410114, Hunan, Peoples R China.
关键词:
Canopy;Drag coefficient;Root;Stem;Transmission coefficient;Vegetation;Wave attenuation
摘要:
To experimentally study the performance of the stem, root and canopy on wave attenuation by vegetation, a total of 112 laboratory experiments were conducted with seven vegetation models, four vegetation densities, five wave heights and four water depths. Wave period was assumed constant, limiting the understanding of wave attenuation phenomena by vegetation. Frictional energy losses from sidewall and bottom were measured and removed by comparing with non-vegetated tests. Experimental results show that wave attenuation by vegetation with stems, roots and canopies varied with wave conditions due to vertically non-uniform physical vegetation properties. The root significantly impacted wave dissipation when the relative root height was greater than 0.167. Higher wave attenuation occurred when the still water level was located at the canopy geometrical centroid. The transmission coefficients of vegetation of the stem, root and canopy ranged from 0.21 to 0.83. An empirical formula for predicting transmission coefficients of vegetation with stems, roots and canopies was obtained based on experimental data. The wave energy dissipated by vegetation was estimated in terms of drag coefficients calculated by analytical models of Dalrymple et al. (1984) and Kobayashi et al. (1993). A semi-empirical analytical equation was proposed on the basis of experimental data for predicting wave attenuation by vegetation of the stem, root and canopy. © 2019 Elsevier B.V.
语种:
英文
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Numerical investigation of solitary wave interaction with a row of vertical slotted piles on a sloping beach
作者:
Jiang, Changbo;Liu, Xiaojian;Yao, Yu* ;Deng, Bin
期刊:
International Journal of Naval Architecture and Ocean Engineering ,2019年11(1):530-541 ISSN:2092-6782
通讯作者:
Yao, Yu
作者机构:
[Jiang, Changbo; Yao, Yu; Liu, Xiaojian; Deng, Bin] Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha 410114, Hunan, Peoples R China.;[Jiang, Changbo; Deng, Bin] Key Lab Water Sediment Sci & Water Disaster Preve, Changsha 410114, Hunan, Peoples R China.;[Yao, Yu] Key Lab Key Technol Hydropower Dev Hunan Prov, Changsha 410014, Hunan, Peoples R China.
通讯机构:
[Yao, Yu] C;[Yao, Yu] K;Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha 410114, Hunan, Peoples R China.;Key Lab Key Technol Hydropower Dev Hunan Prov, Changsha 410014, Hunan, Peoples R China.
关键词:
Solitary wave;Navier-Stokes equations;Slotted piles;Impact force;Slamming coefficient
摘要:
To improve our current understanding of tsunami-like solitary waves interacting with a row of vertical slotted piles on a sloping beach, a 3D numerical wave tank based on the CFD tool OpenFOAM (R) was developed in this study. The Navier-Stokes equations were employed to solve the two-phase incompressible flow, combining with an improved VOF method to track the free surface and a LES model to resolve the turbulence. The numerical model was firstly validated by our laboratory measurements of wave, flow and dynamic pressure around both a row of piles and a single pile on a slope subjected to solitary waves. Subsequently, a series of numerical experiments were conducted to analyze the breaking wave force in view of varying incident wave heights, offshore water depths, spaces between adjacent piles and beach slopes. Finally, a slamming coefficient was discussed to account for the breaking wave force impacting on the piles. (C) 2018 Society of Naval Architects of Korea. Production and hosting by Elsevier E.V.
语种:
英文
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Three-Dimensional Temperature Field Change in the South China Sea during Typhoon Kai-Tak (1213) Based on a Fully Coupled Atmosphere-Wave-Ocean Model
作者:
Wu, Zhiyuan;Jiang, Changbo* ;Chen, Jie;Long, Yuannan;Deng, Bin;...
期刊:
Water ,2019年11(1) ISSN:2073-4441
通讯作者:
Jiang, Changbo
作者机构:
[Long, Yuannan; Jiang, Changbo; Wu, Zhiyuan; Deng, Bin; Chen, Jie] Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha 410004, Hunan, Peoples R China.;[Long, Yuannan; Jiang, Changbo; Wu, Zhiyuan; Deng, Bin; Chen, Jie] Key Lab Water Sediment Sci & Water Disaster Preve, Changsha 410004, Hunan, Peoples R China.;[Wu, Zhiyuan] Univ Massachusetts Dartmouth, Sch Marine Sci & Technol, New Bedford, MA 02744 USA.;[Liu, Xiaojian; Wu, Zhiyuan] Minist Water Resources, Key Lab Pearl River Estuarine Dynam & Associated, Guangzhou 510611, Guangdong, Peoples R China.
通讯机构:
[Jiang, Changbo] C;[Jiang, Changbo] K;Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha 410004, Hunan, Peoples R China.;Key Lab Water Sediment Sci & Water Disaster Preve, Changsha 410004, Hunan, Peoples R China.
关键词:
temperature field;sea surface cooling;cold eddy;sea-air interaction;fully coupled Atmosphere-Wave-Ocean model;COAWST model system
摘要:
Studying the sea-air interaction between the upper ocean and typhoons is crucial to improve our understanding of heat and momentum exchange between the atmosphere and the ocean. There is a strong heat flux exchange between the atmosphere and the ocean during the impact of a typhoon, and the physical fields, such as the wind field, wave field, flow field, and SST field, also interact with each other. A fully coupled Atmosphere-Wave-Ocean model in the South China Sea was established by the mesoscale atmospheric model WRF, wave model SWAN, and the regional ocean model ROMS based on the COAWST model system. Typhoon Kai-tak was simulated using this fully coupled model and some other coupled schemes. In this paper, the variation of sea surface temperature (SST) and ocean subsurface temperature caused by Typhoon Kai-tak is analyzed by the fully coupled model, and the basic characteristics of the response of the upper ocean to the typhoon are given. The simulation results demonstrate that the fully coupled WRF-SWAN-ROMS model shows that the typhoon passes through the sea with obvious cooling. In the cold eddy region, the sea surface temperature cools 4 to 5 °C, and the cooling zone is concentrated on the right side of the track. The change of sea surface temperature lags more than 12 h behind the change of sea surface height. The decrease of SST on the left side of the track was relatively small: ranging from 1.5 to 2.5 °C. The disturbance of typhoon causes the subsurface water to surge to the surface, changes the temperature distribution of the surface, and causes the mixing layer to deepen about 40 m to 60 m. The simulation results reveal the temporal and spatial distribution of sea temperature and mixed layer depth. The sea surface temperature field has an asymmetrical distribution in space and has a lag in time. The heat exchange at the air-sea interface is very strong under the influence of the typhoon. The heat exchange between the air and sea is divided into latent heat and sensible heat, and the latent heat generated by water vapor evaporation plays a dominant role in the heat exchange at the air-sea interface, which shows that the heat carried by the vaporization of the sea surface is one of the important factors for the decrease of sea temperature under the influence of the typhoon. © 2019 by the authors.
语种:
英文
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波流耦合模式及其在理想潮汐通道中的应用
作者:
伍志元;蒋昌波;邓斌;曹永港
期刊:
哈尔滨工程大学学报 ,2019年40(8):1420-1426 ISSN:1006-7043
通讯作者:
Jiang, Changbo(jiangchb@csust.edu.cn)
作者机构:
[伍志元; 蒋昌波; 邓斌] School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha;410004, China;Hu'nan Provincial Key Laboratory of Water, Sediment Sciences & Flood Hazard Prevention, Changsha;School for Marine Science and Technology, University of Massachusetts Dartmouth, New Bedford;MA
通讯机构:
[Jiang, C.] S;School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha, China
关键词:
波流耦合;潮汐通道;海洋模式;海浪模式;辐射应力
摘要:
波浪和水流是近岸地区最重要的2种动力要素,为探究两者之间相互作用关系,本文利用MCT耦合器,将第3代海浪模型SWAN和区域海洋模型ROMS进行耦合,建立了 SWAN-ROMS波流双向实时耦合模型。针对理想潮汐通道的典型算例进行波流耦合计算分析,分别对采用SWAN模型单独计算和采用SWAN与ROMS耦合计算的方案进行了数值试验,通过对照两者的结果,分析波流相互作用条件下对波浪和潮流的影响。研究发现建立的波流耦合模式能够较好模拟潮汐通道中的波、流相互作用关系,潮流的存在对波浪影响较为明显,周期性的潮流运动使得稳定的波浪场也产生了周期性变化,潮流与波浪向同一方向传播时,会导致波高减小,而相对运动则会导致波高增加。
语种:
中文
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Flood mitigation using an innovative flood control scheme in a large lake: Dongting Lake, China
作者:
Liu, Yizhuang;Yang, Shu-Qing;Jiang, Changbo* ;Sivakumar, Muttucumaru;Enever, Keith;...
期刊:
Applied Sciences-Basel ,2019年9(12):ARTN 2465 ISSN:2076-3417
通讯作者:
Jiang, Changbo
作者机构:
[Liu, Yizhuang; Jiang, Changbo; Long, Yuannan; Deng, Bin; Yin, Lingshi] Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha 4100114, Hunan, Peoples R China;[Liu, Yizhuang; Yang, Shu-Qing; Sivakumar, Muttucumaru; Khalil, Usman] Univ Wollongong, Sch Civil Min & Environm Engn, Wollongong, NSW 2522, Australia;[Jiang, Changbo; Long, Yuannan; Deng, Bin] Key Lab Dongting Lake Aquat Ecoenvironm Control &, Changsha 410114, Hunan, Peoples R China;[Jiang, Changbo; Long, Yuannan; Deng, Bin] Key Lab Water Sediment Sci & Water Disaster Preve, Changsha 410114, Hunan, Peoples R China;[Enever, Keith] Univ Wollongong, Sch Mech Mat Mechatron & Biomed Engn, Wollongong, NSW 2522, Australia
通讯机构:
[Jiang, Changbo] C;[Jiang, Changbo] K;Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha 4100114, Hunan, Peoples R China. Key Lab Dongting Lake Aquat Ecoenvironm Control &, Changsha 410114, Hunan, Peoples R China. Key Lab Water Sediment Sci & Water Disaster Preve, Changsha 410114, Hunan, Peoples R China.
关键词:
flood mitigation;Dongting Lake;flood control capacity;peak water level
摘要:
A large lake plays an important role in mitigating flood disasters in its nearby regions during the flooding period; however, the effect is limited, because most of its storage capacity becomes dead storage prior to the arrival of the flood wave. In the current study, an innovative flood control scheme (IFCS) is applied to Dongting Lake (the second largest freshwater lake in China) to alleviate flood disasters. MIKE 21 FM was used to examine its feasibility to mitigate flood disasters. One of the largest floods in the 20th century, the 1998-type flood, was modelled and the maximum water levels with/without IFCS were compared. The result shows that the effective flood control storage could be at least doubled when compared with the natural condition once IFCS was applied. The peak flood level in the Dongting Lake could be lowered by at least 0.32 m at the Chenglingji station in the same flood passage of Dongting Lake. The case study reveals that, after applying IFCS, the hydraulic gates play a very important role in floodwater regulation and further study should be conducted to find the optimized operation for each gate in the flood control scheme system. © 2019 by the authors. All right reserved.
语种:
英文
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一种高硬度水除硬方法及装置
发明/设计人:
聂小保;肖辉毅;蒋昌波;隆院男;王奕睿
申请/专利权人:
长沙理工大学
申请/专利号:
CN201910883938.5
申请时间:
2019-09-19
公开号:
CN110550747A
公开时间:
2019-12-10
主申请人地址:
410114 湖南省长沙市天心区万家丽南路2段960号
摘要:
本发明公开了一种高硬度水除硬方法,高硬度水首先与循环回流的低硬度地下水混合,经稀释后硬度快速降低,之后进入导流筒中的结晶区。结晶区内地下水以上向流形式,与来自结晶区中心穿孔加药管的沉淀剂沿程逐次混合,结晶反应体系得以维持在较低的离子浓度积水平,并且离子浓度积沿程逐渐降低。在较低的离子浓度积条件下,反应体系中的均相结晶被有效抑制,钙镁离子与沉淀剂离子以构晶离子形式在晶种表面进行非均相表面结晶,微晶产率大幅降低,少量微晶将随循环水流重新进入结晶区充当晶种。本发明还公开了一种实现上述高硬度水除硬装置。
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一种用于清理珊瑚礁上泥沙的装置
发明/设计人:
姚宇;杨笑笑;蒋昌波
申请/专利权人:
长沙理工大学
申请/专利号:
CN201910036108.9
申请时间:
2019-01-15
公开号:
CN109759387A
公开时间:
2019-05-17
主申请人地址:
410076 湖南省长沙市天心区赤岭路45号
摘要:
本发明公开了利用潜航器带动靶头清理泥沙的智能化的装置,属于珊瑚礁生态修复技术领域。其包括储沙平台、锚链、锚块、抽沙泵、输沙管、连通管、潜航器、靶头控制盘、升降杆、配水管、内筒、外筒、叶片、抽水泵、输水管、进水口、距离传感器,其特征在于:利用设置在可自航式智能潜航器中的抽水泵抽取海水,海水经过可调节高度的靶头单元形成喷射水流将泥沙悬浮,悬浮泥沙通过抽沙泵抽至具有沙水分离系统的储沙平台。本发明结合了液压升降技术以及射流原理,提供一种可移动的清理珊瑚礁上泥沙的装置。通过该装置可以有效的适应珊瑚礁凹凸不平的地形,达到快速治理珊瑚礁泥沙覆盖问题的目的。
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一种污水处理厂二级出水深度除磷及磷回收装置和方法
发明/设计人:
聂小保;陆洲;刘阳;梁军;蒋昌波;...
申请/专利权人:
长沙理工大学
申请/专利号:
CN201910787634.9
申请时间:
2019-08-26
公开号:
CN110395824A
公开时间:
2019-11-01
主申请人地址:
410114 湖南省长沙市天心区万家丽南路2段960号
摘要:
本发明公开了一种污水处理厂二级出水深度除磷及磷回收装置和方法,借助于流化床中上升水流使大量细小的HAP晶种颗粒流化,形成诱导结晶区;二级出水中低浓度的PO43‑和投加的OH‑和Ca2+在诱导结晶区首先生成HAP分子团簇,分子团簇在上升水流作用下与HAP晶种颗粒发生快速团聚结晶,生成结晶产物HAP,并沉积在流化床底部;少量破碎结晶产物,在上升水流作用下进入到流化床的缓冲区时,速度沿程逐渐下降,在重力作用下又重新返回到诱导结晶区,如此发生上升‑下沉循环,并在循环中逐渐成长,最终落入诱导结晶区充当新的晶种,补充由于结晶产物HAP排放所引起的晶种流失。本发明具有处理效果好且磷的回收利用价值高的优点。
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类阿基米德原理下方形墩柱绕流阻力与尾涡区之间的关系试验研究
作者:
邓斌;蒋昌波;刘洋;杨树清
期刊:
中国科学(技术科学) ,2018年48(11):1167-1178 ISSN:1674-7259
作者机构:
长沙理工大学水利工程学院, 长沙, 410114;洞庭湖水环境治理与生态修复湖南省重点实验室, 洞庭湖水环境治理与生态修复湖南省重点实验室, 长沙, 410114;江苏省水利科学研究院, 南京, 210017;School of Civil and Environment Engineering,University of Wollongong, Australia, Wollongong, 2522;[邓斌; 蒋昌波] 长沙理工大学水利工程学院, 长沙, 410114 洞庭湖水环境治理与生态修复湖南省重点实验室, 洞庭湖水环境治理与生态修复湖南省重点实验室, 长沙, 410114
关键词:
方形墩柱;水流特性;绕流阻力;尾涡区;粒子图像测速技术
摘要:
墩柱所受绕流阻力一直以来是流体力学所关注的焦点问题,具有重要的意义.方形作为墩柱结构的一种重要截面形式,在实际工程中得到广泛应用.本文类比阿基米德原理对方形墩柱所受绕流阻力进行分析,旨在探究方形墩柱绕流阻力形成机理及其与尾涡区之间的关系.试验基于压力传感器和粒子图像测速技术(PIV)分别对方形墩柱所受压强与周围水流结构进行测量,并对不同雷诺数下(2500≤Re≤20000)方形墩柱附近水流特性、绕流阻力与尾涡区之间的关系进行详细分析.根据实测数据,对墩后尾涡区时均相对体积、无量纲时均绕流阻力和无量纲化新型绕流阻力公式时均关系系数随Re的变化进行公式拟合,相关性均较好,并发现三者分别与Re之间存在较好的二次函数关系;对绕流阻力随尾涡区体积变化分别进行线性和二次函数拟合,发现吻合度均较好,在现实较大水流条件下,推荐采用线性拟合公式.
语种:
中文
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海啸波作用下沿海公路路基淘刷实验研究
作者:
陈杰;蒋昌波;伍志元;刘静;邓斌;...
作者机构:
长沙理工大学水利工程学院,湖南长沙410004;水沙科学与水灾害防治湖南省重点实验室,湖南长沙410004
会议名称:
第十六届中国海洋(岸)工程学术讨论会
会议时间:
20130805
会议地点:
大连
会议论文集名称:
第十六届中国海洋(岸)工程学术讨论会论文集
关键词:
沿海公路;路基;冲刷机理;海啸波
摘要:
海啸破坏力巨大,研究沿海公路局部冲刷机理意义重大.基于波浪水槽实验,对海啸波作用下路基淘刷开展研究.实验采用1/10-1/20的组合坡度,斜坡由无黏性细沙堆成.选取N波作为入射波,进行6个波逐个作用.对波高进行采集,对波浪的上爬、回落和水跃过程进行拍摄记录,对每个波作用后的地形进行测量.结果表明,N波作用下不仅地形发生冲淤变化,而且在路基前有明显的冲刷坑,模型深度d的变化对冲刷影响不大.路基淘刷是由于回落水流所形成的螺旋流造成的,当路基向岸侧的前滩严重侵蚀后,上冲的水流也会造成路基淘刷.
语种:
中文
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植物对孤立波作用下直立堤局部冲刷影响实验研究
作者:
蒋昌波;冯璐;陈杰;伍志元;王珠桥
期刊:
海洋通报 ,2018年37(1):104-112 ISSN:1001-6392
作者机构:
长沙理工大学水利工程学院, 湖南, 长沙, 410114;水沙科学与水灾害防治湖南省重点实验室, 水沙科学与水灾害防治湖南省重点实验室, 湖南, 长沙, 410114;长沙理工大学水科学与环境工程国际研究中心, 湖南, 长沙, 410114;[蒋昌波; 陈杰] 长沙理工大学水利工程学院, 湖南, 长沙, 410114 水沙科学与水灾害防治湖南省重点实验室, 水沙科学与水灾害防治湖南省重点实验室, 湖南, 长沙, 410114 长沙理工大学水科学与环境工程国际研究中心, 湖南, 长沙, 410114;[冯璐; 伍志元; 王珠桥] 长沙理工大学水利工程学院, 湖南, 长沙, 410114
关键词:
孤立波;直立堤;植物;局部冲刷
摘要:
基于水槽实验,研究植物对孤立波作用下直立堤局部冲刷的影响。通过改变实验入射波高、植物带的宽度和密度,分析各要素对直立堤局部冲刷的影响。实验对波高沿程变化、孤立波越堤、回落过程以及地形演变进行全程的测量和记录,并进行有无植物带保护的直立堤局部冲刷对比分析。结果表明,植物带的存在,使得堤后相对最大冲刷深度显著减小,堤前冲刷形态由单峰式“L”型变为双峰式淤积沙坝形态,且冲刷位置由原堤脚前移至植物带所在位置,冲刷范围大幅增加。减小植物带密度或者植物带宽度会使近岸侧或是离岸侧的相对最大冲刷深度和相对最大淤积高度有增大的趋势,但是当入射波高增大时,二者的影响不显著。该研究对实际工程中植物带的合理布置提出了具有参考性的建议,对减少堤防工程的冲刷和损失有一定现实意义。
语种:
中文
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规则波作用下植物带波高衰减特性实验研究
作者:
何飞;陈杰;蒋昌波;赵静
期刊:
海洋科学进展 ,2018年36(1):146-158 ISSN:1671-6647
作者机构:
长沙理工大学水利工程学院, 湖南, 长沙, 410114;水沙科学与水灾害防治湖南省重点实验室, 水沙科学与水灾害防治湖南省重点实验室, 湖南, 长沙, 410114;长沙理工大学水科学与环境工程国际研究中心, 湖南, 长沙, 410114;[何飞; 赵静] 长沙理工大学水利工程学院, 湖南, 长沙, 410114;[陈杰; 蒋昌波] 长沙理工大学水利工程学院, 湖南, 长沙, 410114 水沙科学与水灾害防治湖南省重点实验室, 水沙科学与水灾害防治湖南省重点实验室, 湖南, 长沙, 410114 长沙理工大学水科学与环境工程国际研究中心, 湖南, 长沙, 410114
关键词:
植物带;波高衰减;淹没度;指数形式
摘要:
基于综合考虑根、茎、叶影响的近岸植物消波实验,对植物带沿程波高衰减特性进行了研究。结果表明,当淹没度为0.778时,茎与根作用下的植物带沿程波高衰减强度沿向岸方向逐渐增强,植物带沿程波高衰减规律与Dalrymple幂函数形式和Kobayashi指数形式的波高衰减规律并不一致。在非淹没情况下,叶作用下的植物带沿程波高衰减服从幂函数形式和指数形式的波高衰减规律。植物带沿程波高衰减强度随分布密度的增大而增大。研究发现根、茎、叶及分布密度对植物带沿程波高衰减特性的影响与植物淹没度和入射波高相关。另外,植物带消波并不是各部分消波作用的线性叠加。当植物带分布密度较大时,Dalrymple和Kobayashi波浪传播模型的有效性有待进一步提高。
语种:
中文
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基于海气耦合模式的南中国海北部风暴潮模拟
作者:
伍志元;蒋昌波;邓斌;曹永港
期刊:
科学通报 ,2018年63(33):3494-3504 ISSN:0023-074X
通讯作者:
Jiang, C.
作者机构:
长沙理工大学水利工程学院, 长沙, 410114;水沙科学与水灾害防治湖南省重点实验室, 水沙科学与水灾害防治湖南省重点实验室, 长沙, 410114;School for Marine Science and Technology, University of Massachusetts Dartmouth, USA, New Bedford, MA 02744;国家海洋局南海调查技术中心, 广州, 510300;[伍志元] 长沙理工大学水利工程学院, 长沙, 410114 水沙科学与水灾害防治湖南省重点实验室, 水沙科学与水灾害防治湖南省重点实验室, 长沙, 410114 School for Marine Science and Technology, University of Massachusetts Dartmouth, USA, New Bedford, MA 02744
通讯机构:
School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha, China
关键词:
风暴潮;数值模拟;海气耦合;南中国海
摘要:
伴随台风产生的大风、暴雨、巨浪、风暴潮形成的台风灾害链对沿岸地区产生巨大影响,研究台风的形成和运动机理,减小风暴潮灾害,具有重要的科学价值和社会意义.台风影响期间,大气与海洋之间存在强烈的质量、能量交换,风场、流场、波浪场等物理场相互作用、相互影响.基于中尺度大气模式WRF和区域海洋模式ROMS,构建南中国海地区海气耦合模式,针对2012年台风“启德”进行数值模拟.通过观测数据对台风路径和强度进行验证,结果表明,建立的WRF-ROMS耦合模式在对台风“启德”影响下的南中国海风暴潮模拟中展现出较高的模拟精度.通过数值模式计算结果揭示了台风、风暴增水和风生流场的时空分布特征.台风运动过程中台风动力场、风暴增水及流场在空间上均具有“右偏性”的不对称分布特征,近岸风暴增水对台风的响应在时间上存在滞后性,风生流场具有较明显的滞后性特征.
语种:
中文
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次氯酸钠对剑水蚤灭活动力学及紫外强化灭活
作者:
何盼盼;聂小保;蒋昌波;唐韵子;隆院男;...
期刊:
中国环境科学 ,2018年38(2):588-595 ISSN:1000-6923
通讯作者:
Nie, Xiao-Bao(niexbcslg@163.com)
作者机构:
[何盼盼; 聂小保; 蒋昌波; 唐韵子; 隆院男; 徐超] 长沙理工大学水利工程学院;[何盼盼; 聂小保; 蒋昌波; 唐韵子; 隆院男; 徐超] 水沙科学与水灾害防治湖南省重点实验室
关键词:
剑水蚤;次氯酸钠;灭活动力学;紫外
摘要:
水源水体富营养化导致剑水蚤孳生,进入供水系统后威胁供水安全.为高效控制剑水蚤污染风险,通过适当增加NaClO灭活CT值 (NaClO浓度与接触时间乘积)范围,系统研究了NaClO对剑水蚤灭活动力学过程,同时探讨了紫外照射对灭活效果的强化作用.结果表明:NaClO对剑水蚤的灭活动力学过程符合迟滞型两阶段准一级动力学过程,灭活反应活化能为3774J/mol;pH值对灭活动力学过程的影响,主要通过改变溶液中HOC1和ClO物质的量及其化学稳定性来实现.当灭活CT值超出70mg min/L时,中性条件下NaClO对剑水蚤的灭活效率最高,碱性次之,酸性最差;浊度物质会削弱NaClO对剑水蚤的灭活效果,浊度物质会迟滞NaClO从液相主体向剑水蚤体表边界层的传质过程,被剑水蚤体表吸附后也会阻碍NaClO向剑水蚤体内的渗透过程.紫外照射尽管无法实现对剑水蚤的灭活,但可以强化NaClO对剑水蚤的灭活效果,经紫外照射后,剑水蚤灭活迟滞期消失或缩短,同时灭活反应速率常数增加.当pH值为6、7和8时,紫外照射预处理后,各自灭活反应速率常数分别由0.0093、0.02185和0.0206提高至0.0105、0.02673和0.0286.
语种:
中文
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Boussinesq modeling of solitary wave run-up reduction by emergent vegetation on a sloping beach
作者:
Yao, Yu* ;Tang, Zhengjiang;Jiang, Changbo;He, Wenrun;Liu, Zengsheng
期刊:
Journal of Hydro-environment Research ,2018年19:78-87 ISSN:1570-6443
通讯作者:
Yao, Yu
作者机构:
[Jiang, Changbo; Tang, Zhengjiang; Yao, Yu; He, Wenrun; Liu, Zengsheng] Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha 410114, Hunan, Peoples R China.;[Yao, Yu] Key Lab Water Sediment Sci & Water Disaster Preve, Changsha 410114, Hunan, Peoples R China.;[Jiang, Changbo] Changsha Univ Sci & Technol, Int Res Ctr Water Sci & Environm Engn, Changsha 410114, Hunan, Peoples R China.
通讯机构:
[Yao, Yu] C;Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha 410114, Hunan, Peoples R China.
关键词:
Mangrove forest;Drag coefficient;Wave run-up;Boussinesq equations;Solitary wave
摘要:
To better understand the reduction of the run-up of leading tsunami waves by mangrove forests on a sloping beach, we presented a numerical model in this study, which was based on one-dimensional (1D) fully nonlinear Boussinesq equations with the effect of vegetation resistance included in terms of the drag coefficient. Solitary waves were used to model the leading tsunami waves and five models of different forest densities and tree distributions of the emergent vegetation were examined. The bottom friction and vegetation drag were calibrated based on our published laboratory experiments. Model results show that the modified Boussinesq equations could give satisfactory predictions of the solitary wave transformation over the vegetation and subsequent run-up on the slope. The drag coefficient was found to be dependent on the incident wave height. Effects of beach slope, forest density and tree distribution on the drag coefficient were also discussed based on the numerical results.
语种:
英文
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环抱式港区水体交换能力数值研究———以闸坡渔港为例
作者:
黄宗伟;邓斌;蒋昌波;刘晓建
期刊:
海洋学研究 ,2018年36(1):66-74 ISSN:1001-909X
作者机构:
长沙理工大学水利工程学院, 湖南, 长沙, 410004;水沙科学与水灾害防治湖南省重点实验室, 水沙科学与水灾害防治湖南省重点实验室, 湖南, 长沙, 410004;长沙理工大学水科学与环境工程国际研究中心, 湖南, 长沙, 410004;[黄宗伟; 刘晓建] 长沙理工大学水利工程学院, 湖南, 长沙, 410004;[邓斌; 蒋昌波] 长沙理工大学水利工程学院, 湖南, 长沙, 410004 水沙科学与水灾害防治湖南省重点实验室, 水沙科学与水灾害防治湖南省重点实验室, 湖南, 长沙, 410004 长沙理工大学水科学与环境工程国际研究中心, 湖南, 长沙, 410004
关键词:
水体交换;半交换周期;数值模拟;闸坡渔港
摘要:
环抱式港池的水体交换能力强弱对港池的水质有重要影响,水体交换通道是改善港池水质的有效措施。本研究以闸坡渔港防波堤改造工程为例,采用不规则三角网格和有限体积方法,在潮流数模研究成果的基础上,建立平面二维对流-扩散数学模型,开展闸坡渔港扩建前后水体交换能力数值模拟研究,评估工程前后港内水体半交换周期和水体交换率。研究结果表明,闸坡渔港的水体交换能力较强,工程前水体半交换时间为129 h,工程后闸坡渔港水体半交换时间为104 h。工程后洲仔峡防波堤被改为涵洞式桥梁,使渔港与外海形成了水体交换通道,增加了港池内外水体相互作用和水体交换量,相应的水体交换能力增强。而港池外的两个水产养殖区域由于与外海相连,水体交换能力较强,工程前后该区域水体交换能力变化不大。
语种:
中文
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Microplastics in Sediment and Surface Water of West Dongting Lake and South Dongting Lake: Abundance, Source and Composition
作者:
Jiang, Changbo* ;Yin, Lingshi;Wen, Xiaofeng;Du, Chunyan;Wu, Lixue;...
期刊:
International Journal of Environmental Research and Public Health ,2018年15(10) ISSN:1661-7827
通讯作者:
Jiang, Changbo
作者机构:
[Yin, Lingshi; Wu, Lixue; Long, Yuannan; Pan, Hemin; Liu, Yizhuang; Jiang, Changbo; Du, Chunyan; Ma, Yuan; Zhou, Zhenyu] Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha 410114, Hunan, Peoples R China.;[Yin, Lingshi; Wu, Lixue; Long, Yuannan; Liu, Yizhuang; Jiang, Changbo; Du, Chunyan; Ma, Yuan] Key Lab Dongting Lake Aquat Ecoenvironm Control &, Changsha 410114, Hunan, Peoples R China.;[Wen, Xiaofeng] Hunan Univ, Coll Environm Sci & Engn, Minist Educ, Changsha 410082, Hunan, Peoples R China.;[Wen, Xiaofeng] Hunan Univ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.;[Yin, Qide] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha 410114, Hunan, Peoples R China.
通讯机构:
[Jiang, Changbo] C;[Jiang, Changbo] K;Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha 410114, Hunan, Peoples R China.;Key Lab Dongting Lake Aquat Ecoenvironm Control &, Changsha 410114, Hunan, Peoples R China.
关键词:
microplastic;Dongting Lake;surface water;sediment
摘要:
Microplastic pollution was investigated in sediment and surface water in West Dongting Lake and South Dongting Lake for the first time. The abundance of microplastics ranged from 616.67 to 2216.67 items/m3 and 716.67 to 2316.67 items/m3 in the lakeshore surface water of West Dongting Lake and South Dongting Lake, respectively. The highest levels of microplastic pollution were found in the lakes’ outlets. In the lake center sites of the West Dongting Lake and South Dongting Lake, the abundance of microplastics ranged from 433.33 to 1500 items/m3 and 366.67 to 1566.67 items/m3, respectively. Meanwhile, the study found that in lakeshore sediment of West Dongting Lake and South Dongting Lake, microplastic concentrations ranged from 320 to 480 items/m3 and 200–1150 items/m3. Polystyrene (PS) and polyethylene terephthalate (PET) were most common in the surface water and sediment samples, respectively. In addition, we suggest that the effects of polymer types in microplastics should be taken into account when considering abundance. This study can provide valuable points of reference to better understanding microplastic pollution in inland freshwater areas. © 2018 by the authors. Licensee MDPI, Basel, Switzerland.
语种:
英文
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一种跌水板组件及跌水充氧接触氧化生态沟渠
发明/设计人:
孙士权;梁焱;蒋昌波;李文祺;陈扬;...
申请/专利权人:
长沙理工大学
申请/专利号:
CN201810537287.X
申请时间:
2018-05-30
公开号:
CN108467103A
公开时间:
2018-08-31
摘要:
一种跌水板组件及跌水充氧接触氧化生态沟渠,包括设置在出水口用于导流的导流板,所述导流板的两侧设有与导流板密封连接的挡边,所述导流板和挡边构成一个导流区;所述导流板上固定有与水流方向设有一夹角的挡板,所述挡板的两端与分别导流板两侧的挡边连接,所述挡板的高度低于挡边的高度,所述导流板上沿水流方向布设有多个挡板,从而将导流区分割为多个流动区域,所述挡板上沿挡板的延伸的方向上设有多个通孔,相邻所述流动区域通过所述通孔连通,本装置强化村镇污水处理效率,保障污水处理出水水质和村镇自然环境,对村镇环境综合整治、我国生态文明建设有重要意义。
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一种跌水板组件及跌水充氧接触氧化生态沟渠
发明/设计人:
孙士权;胡文涛;孙欣悦;梁焱;蒋昌波;...
申请/专利权人:
长沙理工大学
申请/专利号:
CN201820821232.7
申请时间:
2018-05-30
公开号:
CN208802888U
公开时间:
2019-04-30
主申请人地址:
410114 湖南省长沙市雨花区万家丽南路二段960号
摘要:
一种跌水板组件及跌水充氧接触氧化生态沟渠,包括设置在出水口用于导流的导流板,所述导流板的两侧设有与导流板密封连接的挡边,所述导流板和挡边构成一个导流区;所述导流板上固定有与水流方向设有一夹角的挡板,所述挡板的两端与分别导流板两侧的挡边连接,所述挡板的高度低于挡边的高度,所述导流板上沿水流方向布设有多个挡板,从而将导流区分割为多个流动区域,所述挡板上沿挡板的延伸的方向上设有多个通孔,相邻所述流动区域通过所述通孔连通,本装置强化村镇污水处理效率,保障污水处理出水水质和村镇自然环境,对村镇环境综合整治、我国生态文明建设有重要意义。
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