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 同時,由于排污泵站進水水流中含有大量的懸浮固體顆粒,不良的前池流態(tài)會使泥沙更容易在前池淤積,而泥沙淤積又進一步加劇了前池流態(tài)的惡化。
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 徑流流失和泥砂流失主要集中在5 8月份,約占全年流失總量的80以上,這與當?shù)亟涤昙竟?jié)性分配有關(guān)。
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 形成前沉積環(huán)境較為開敞,形成后由于沙嘴的阻隔作用使?jié)q潮槽內(nèi)環(huán)境較為封閉,因此在垂向上沉積物的性質(zhì)不同。
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,目前這些河流、湖泊、水庫和港口的泥沙淤積嚴重,需要進行清淤疏浚,以提高防洪、灌溉、通航能力,改善生態(tài)環(huán)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 本論文是關(guān)于東莊水利樞紐泥沙問題研究的部分成果,主要是針對東莊水利樞紐的修建,對渭河下游淤積的控制作用進行研究。
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 本論文作為東莊水利樞紐可行性論證的一部分,分析了東莊水利樞紐工程的合理運用,將會對渭河下游淤積有一定控制作用,可供決策時參考。
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 那么東莊水庫的修建和運用,是否會造成渭河下游淤積狀況的惡化,進行東莊水利樞紐對渭河下游河道動床物理模型試驗研究就顯得尤為重要。
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 結(jié)果表明渭河下游淤積比隨著涇河張家山站和渭河咸陽站的總水量、總沙量和水流量的提高而降低;渭河下游淤積量隨兩站來沙量的增加,陳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 在金沙江造山帶研究中,將多島弧盆理論應用于這個造山帶的沉積盆地分析研究中,對金沙江多島弧盆造山帶進行了詳細解剖,建立金沙江多島弧盆系造山造盆的模式,進一步發(fā)展造山帶沉積學和沉積盆地分析理論體系。