1) evolution of river regime
河势演变
1.
In the natural channel, though the evolution of river regime has a certain randomness, there still due patterns can be followed.
在天然河道中 ,河势演变虽具有一定的随机性 ,但仍有一定的规律可循。
2.
Based on several typical sections of river bends,the effects from both the evolution of river regime and the bend-flow on river-crossing pipeline,such as the erosions from longitudinal and transverse flows,the uplift and pressure drag caused by the flow around pipe and the momentum and angular momentum caused by the induced velocity between transverse circle flows,etc.
基于几种典型河弯断面,对因河势演变和弯道水流而对裸露于弯道水流中的穿河管道产生的纵向和横向水流冲刷,纵向绕流产生的升力和压差阻力及横向环流间诱导速度产生的动量和动量矩等作用进行了研究。
2) river regime evolution
河势演变
1.
Based on the analysis of the changes of the Songhua River Laozhou branch channel reach in plane section,transverse section and lengthways section within 30 years,we forecast the river regime evolution tendency and propose protective engineering measures for the oil field well area.
通过对松花江涝洲汊道河段近30年平面变化、断面变化和纵向变化进行分析,预测河势演变趋势,提出对井区进行防护的工程措施。
2.
Based on analysis of river regime evolution and channel characteristics in the reach, the issues and development trend of existing river control projects are analyzed and studied in the paper.
在对该河段河道特性及河势演变分析的基础上,对现状整治工程存在的问题和发展趋势进行了分析研究,比较选定了十八户控导工程布局方案,以达到控导主流、使原有工程发挥效益、减轻洪水威胁、稳定清水沟流路的目的。
3) monitoring of river channel evolution
河势演变监测
4) evolution trend of river bed
河床演变趋势
5) river pattern change and control
河势演变与控制
6) evolution tendency
演变趋势
1.
Water environment condition and evolution tendency analysis of the main lakes and reservoirs in Nanjing;
南京市主要湖库水环境现状与演变趋势分析
2.
The main problems and the evolution tendency of the agricultural ecological environment in the Sichuan area are analyzed and some measures are presented.
该文全面分析评价了四川省农业生态环境的主要问题和演变趋势,提出了四川省农业生态环境恢复与重建的对策措施。
3.
In terms of the demand theory,it made a further prediction of the evolution tendency of arable land use in each county under the driving forces.
在此基础上,对驱动因子的变化趋势进行了预测,并根据需求理论,对各县耕地利用在驱动力系统的作用下演变趋势加以预测。
补充资料：河势
【诗文】：
河势浩难测，禹功传所闻。
今观一川破，复以二渠分。
国论终将塞，民嗟亦已勤。
无灾等难必，从众在吾君。
【注释】：
【出处】：
河势浩难测，禹功传所闻。
今观一川破，复以二渠分。
国论终将塞，民嗟亦已勤。
无灾等难必，从众在吾君。
【注释】：
【出处】：
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条