1) estuarine bends
河口弯道
1.
The results indicate that flow field in the bends of tidal estuary differs obviously from that in the bends of non-tide river,including the downstream increase of velocities in the estuarine bends,the bifurcation of mai.
本文采用Deldt3D模型对钱塘江河口闻家堰至仓前河段的潮流场进行二维数值模拟,着重研究了河口弯道的流场特性。
2) river mouth curve
河口汊道急弯
1.
In order to improve grade of channel,regulation measures of alonge curve and river mouth curve and compound curve have been tested in this paper.
为了提高航道等级 ,本研究针对单一急弯、河口汊道急弯、复合急弯 (河口急弯和单一急弯组成 )等多种急弯类型的整治措施进行了深入细致地研究 ,提出的适用于不同河湾类型的整治原则、方法和措施 ,对航道治理技术具有重要的意义 。
3) channel bend
弯曲河道
1.
To analyze the feature of dam-break flow in natural channel bends,channel-fitted orthogonal curvilinear coordinate system is established and two-dimensional shallow water equations are derived in this system through coordinate transformation,simplification and depth integration.
为分析溃坝波在天然弯曲河道中传播的特点,建立了跟踪河道走向的正交曲线坐标系,并通过坐标变换、简化和水深积分推导出了曲线坐标系下的二维浅水方程。
4) meandering rivers
弯道河流
1.
An efficient numerical model for meandering rivers in the orthogonal curvilinear coordinates;
正交曲线坐标下一种有效的弯道河流数值模型
5) bend reach
弯道河段
1.
On the basis of the successful experience in studing navigable technique of Xiangjiang River Dayuandu Navigation Complex,the paper discussed the layout principle of the bend reach navigation complex,the optimization pattern of the training mole structure as well as the siltation features at approach channel of the shiplock and its minimixing measures.
以湘江大源渡航电枢纽通航技术研究的成功经验为基础,论述弯道河段航电枢纽平面布置原则、导流堤结构型式优化,以及船闸引航道泥沙淤积特点和减淤措施。
6) channel bends
弯曲河道
1.
A finite element, method was adopted for weighted convergent mass establishing 2-D flow mathematical model in flow simulation of channel bends, by which the flow pattern of middle and lower channel bends of Li River in the discharge of water transportation was simulated and the calculated results of which concerning water level, flow velocity and discharge were coincident well with measured data.
在弯曲河道的水流计算模拟中 ,用加权的质量集中有限元方法 ,建立了二维弯曲河道水流数学模型 ,模似了黎河中下游弯曲河段在输水流量下的流动形态 ,与实测水位、流速、流量资料相比完全吻合 ,提出弯曲河道护岸在水动力作用下的受力分析方法。
2.
In this paper, the bed form laws in channel bends are investigated.
本文对弯曲河道床面形态规律进行了较全面的理论分析与试验研究,给出了床面形态高度和波长的计算表达式,并用美国FallRiver原型观测资料进行了验证,结果令人满
补充资料:北仑河口红树林自然保护区
北仑河口红树林自然保护区
北仑河口海洋自然保护区位于广西防城港市防城区和东兴市的北仑河(中越界河)河口三角洲我方一侧,面积为2680公顷。属于海洋和海岸生态系统类型,拥有河口海岸。开阔海岸和海湾海岸等地貌类型,主要保护北仑河口和珍珠港的红树林及其海洋自然生态系统。保护区具有红树林连片生长面积大、分布相对集中、生态景观奇特、地理位置特殊、动植物种类组成和群落结构随海岸类型变化而呈多样化等特征,在遗传、物种和生态系统等方面具有我国其他的海区不可代替的作用。
1990年3月,广西区政府批准在该地建立省级海洋自然保护区,1998年5月,由国家海洋局经国土资源部。向国务院申报,在1999年11月召开的国家级自然保护区评审会上获得全体评审委员一致通过,日前终获国务院批准建立为国家级海洋当然保护区。
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