河谷阶地 meaning in English

valley terrace

In the end , we forecasted the evolutionary trend of the river terraces in the mid - tail of weihe river according to their evolutionary characteristics
最后，根据渭河中下游各河谷阶地的演化特点对其演化趋势进行了初步的预测。
Dig jade is it leave riverbed in river valley terrace , do beach to refer to , ancient river and alluviation , diluvian gravel that fan have dig seeking and d jade gravel of the layer in front of the mountains the jade of these places is brought by the flowing water too
挖玉是指离开河床在河谷阶地干滩古河道和山前冲积洪积扇上的砾石层中挖寻和阗玉砾。这些地方的玉也是由流水带来的。
This theme selected weihe river round tianshui , jinhe river round binxian , bahe river round lantian and luohe river round luochuan to study the evolutionary model of river terraces in the mid - tail of weihe river . we have built the cross - section of each river , and analyzed the evolution of each river terrace in the mid - tail of weihe river according to the velocity of downcuting and lateral erosion
本论文以天水渭南镇段渭河、彬县段泾河、蓝田段灞河和秦家河段洛河为例建立渭河中下游河流阶地演化模式，以阶地形成年代为标尺，根据下切速度和侧蚀速度对渭河中下游各河谷阶地的演化过程进行了分析。