To resolve the sediment problems in the hydraulic engineering, sediment research concerns on realizing the rule of sediment movement and fluvial processes.
泥沙研究主要是认识水流中的泥沙运动规律、河床演变规律，进而解决水利工程中的泥沙问题。
Five basic problems, which relate with sediment transport, have been discussed.
探讨了与泥沙运动有关的五个基本问题。
As one of the most basic problems in the sediment transport theory, the mechanism of the sediment incipience is also needed to be understood for the study of local scouring process.
泥沙起动是泥沙运动理论中最基本的问题之一，也是研究泥沙输运及局部冲刷时必需解决的问题。
The sediment and its influence on water environment cause a series of problems and difficulties in the water environmental quality assessment for sediment-laden water of the Yellow River.
黄河多泥沙水体中存在的泥沙及其对水环境造成的影响给河流水环境质量评价带来了一系列特有的问题和困难。
Estuarine sediment flux is one of the international frontal problems in the earth science, so studies on it have important scientific and practical implications.
河口泥沙通量是地球科学国际前沿课题，对它进行研究具有重大的科学和实际意义。
Based on sediment transport experiments, the interaction between flow and sediment movement is analysed and the problems of grain resistance and bed load transport on plane movable bed are discussed.
本文在输沙实验的基础上，从研究水流结构着手，分析了水流和泥沙之间的相互作用关系，讨论了动床沙粒阻力和底沙输移规律。
This paper introduces soil erosion and sediment yield scale features, scale transfer styles and theory methods, and the necessity to pay attention to the problems of scale transfer.
本文在介绍了侵蚀产沙的尺度特征后，对侵蚀产沙尺度转换的类型和理论方法进行了总结，最后还强调了尺度转换中应注意的问题。
Space scales of soil erosion and sediment yield and scales transfer problems have become currently new fields in soil erosion researches.
侵蚀产沙的空间尺度及尺度转换问题已成为当前土壤侵蚀研究的前沿领域。
The systematic study has been made on the problems of wave, nearshore currents, sediment transport related to the coastal evolution of sand beach under the action of wave.
针对与砂质海岸在波浪作用下的演变有关的波浪、近岸流及输沙问题进行了系统的研究，并对结构物附近海岸演变进行了数值模拟。
Hydrologic method and soil conservation method are two usual methods for calculating sediment and runoff reduction benefit brought by watershed management, but both have some problems.
水文法和水保法是分析计算流域治理减水减沙效益常用的两种方法，但都存在一些问题。
Current dynamics and sediment conditions are always one of the crucial problems in harbor layout.
水流、泥沙一直是建港中关键问题之一。
Current dynamics and sediment conditions are always one of the crucial problems in harbor layout.
水流、泥沙一直是建港中关键问题之一。
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