Meanwhile , because there are a lot of sediments in sewage in the forebay , the bad flow pattern will make sediments depositing freely and the sediment deposition will cause worse flow pattern 同时，由于排污泵站进水水流中含有大量的悬浮固体颗粒，不良的前池流态会使泥沙更容易在前池淤积，而泥沙淤积又进一步加剧了前池流态的恶化。
The runoff and sediment deposition during the period may to august accounted for more than 80 % of annual runoff and sediment deposit , this was due to the fact that during this period the area receives higher precipitation and rainfall 径流流失和泥砂流失主要集中在5 8月份，约占全年流失总量的80以上，这与当地降雨季节性分配有关。
The open and close environment before and after the channel formation makes different sediments deposit in the flood channels . at the same time the various sediments give the important information about the surroundings difference 形成前沉积环境较为开敞，形成后由于沙嘴的阻隔作用使涨潮槽内环境较为封闭，因此在垂向上沉积物的性质不同。
Because of the severe soil and water loss in middle reaches of the yellow river , a large amount of sediment deposited in the bed of the lower reaches , which make the river the famous perched river 黄河水患是中华民族的心腹大患。由于黄河流域严重的水土流失，大量的泥沙淤积在下游河床，使黄河成为著名的悬河，给黄河下游两岸的生命财产安全造成严重的威胁。
But currently a huge amount of sediment deposited there has caused severe problems and need to be dredged . dredging is one of the effective engineering measures to control floods and improve navigation , irrigation conditions and environment 但是，目前这些河流、湖泊、水库和港口的泥沙淤积严重，需要进行清淤疏浚，以提高防洪、灌溉、通航能力，改善生态环境。
The thesis is the part of research achievements about sediment deposit of dong zhuang water conservancy hub . the main content is research on control action of sediment deposit along lower wei - river because of the building of dong zhuang reservoir 本论文是关于东庄水利枢纽泥沙问题研究的部分成果，主要是针对东庄水利枢纽的修建，对渭河下游淤积的控制作用进行研究。
By analyzing and research . we can come to a concollusion that the sediment deposit of lower wei - river can be controlled : relying in the rational application of dong zhuang water conservancy project . it can be regarded as a reference of policy decision 本论文作为东庄水利枢纽可行性论证的一部分，分析了东庄水利枢纽工程的合理运用，将会对渭河下游淤积有一定控制作用，可供决策时参考。
Thus , whether the building and putting in use of dong zhuang reservoir will result in sediment deposits worsen of lower wei - river ? so it is very important to conduct the movable bed physical model about dong zhung water conservancy hub on river bed of lower wei - river 那么东庄水库的修建和运用，是否会造成渭河下游淤积状况的恶化，进行东庄水利枢纽对渭河下游河道动床物理模型试验研究就显得尤为重要。
We can reach a conclusion , firstly , the gross water capacity , gross sediment capacity and zhang jia shan station of jing - river and xian yang station of wei - rever increase but deposit ratio of lower wei - river decrease . secondly , the sediment deposit of lower wei - river increase in pace with the crease in of sediment from the two station and the level rising of chen village 结果表明渭河下游淤积比随着泾河张家山站和渭河咸阳站的总水量、总沙量和水流量的提高而降低；渭河下游淤积量随两站来沙量的增加，陈村水位的抬高而增加。
The stratigraphic sequences and sedimentological characteristics indicate that the main body of the bayan har basin is composed of triassic flysch sediments deposited in a foreland basin during the triassic . in the study of jinshajiang orogenic belt , in the applying archipelago theory and particular anatomies to basin analysis in this orogeny , the model of jinshajiang archipelago mountain building and basin building is set up . the orogenic - sedimentology and sedimentary basin analysis system is printed archipelago paleogeography any more 在金沙江造山带研究中，将多岛弧盆理论应用于这个造山带的沉积盆地分析研究中，对金沙江多岛弧盆造山带进行了详细解剖，建立金沙江多岛弧盆系造山造盆的模式，进一步发展造山带沉积学和沉积盆地分析理论体系。
