Placer tin deposit in xupu occurs in alluvial sediment of quatemary system and cassiterite chiefly concentrates at the bottom of gravel layers.
溆浦砂锡矿床赋存在第四系冲积层中锡石主要富集在底部砂砾石层。
Placer tin deposit in Xupu occurs in alluvial sediment of Quatemary SyStem and CaSSiterite chiefly concentrates at the bottom of Gravel layers.
溆浦砂锡矿床赋存在第四系冲积层中，锡石主要富集在底部砂砾石层。
Alluvial soil a type of soil formed on river floodplains and deltas, where new sediment is deposited on the land during floods.
在河流漫滩和三角洲地带由洪水冲刷泥沙沉积而形成的土壤类型。
Sand wave movement is an important form of sediment movement for alluvial rivers and has a great effect on stream resistance.
沙波运动是冲积河流泥沙运动的一种重要形式。沙波的消长对河道水流的阻力损失有很大的影响。
Alluvial channel resistance is one of the most important issues in sediment transport mechanics.
冲积河流阻力是泥沙运动力学中的一个重要问题。
The bending braided river is common in the alluvial plain, which water and sediment movement characteristics are complex.
弯曲分汊型河道在冲积平原河流中常见，其水沙运动规律较为复杂。
In the construction of barrage diversion works on alluvial rivers with heavy sediment load, complete systematic experience and design criteria are still lacking.
在平原多沙河流上修建引水枢纽，缺乏较系统完整的经验和指导原则。
Based on data from the Huanghe (Yellow) River, the sediment storing-releasing process in an alluvial channel has been studied.
确定了黄河下游河道处于泥沙存贮-释放临界状态的水沙临界条件。
In front of the middle segment of the mountain, there is Dashuigou alluvial fan with coarse sediment, moderate slope and less fan area.
中段的大水沟等四个扇体组成物质较粗，坡度较大，而面积较小。
An equation to calculate the critical discharge for river bed variation in alluvial rivers was derived through the theory of non-equilibrium sediment transport.
利用非饱和和输沙公式，首次提出了以悬移质为主的冲积河流中冲淤临界流量与水沙以及边界条件的一般关系。
An equation to calculate the critical discharge for river bed variation in alluvial rivers was derived through the theory of non-equilibrium sediment transport.
利用非饱和和输沙公式，首次提出了以悬移质为主的冲积河流中冲淤临界流量与水沙以及边界条件的一般关系。
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