本文關(guān)鍵詞：土工格室降低湖泊內(nèi)源釋放模擬分析　出處：《巖土工程學(xué)報(bào)》2016年S1期 　論文類型：期刊論文

  更多相關(guān)文章： 內(nèi)源釋放 土工格室 水動(dòng)力學(xué)

【摘要】：湖泊富營(yíng)養(yǎng)化與內(nèi)源釋放有密切的關(guān)系,降低湖泊因水動(dòng)力作用引起的底泥再懸浮可大幅度減少湖泊內(nèi)源污染物的釋放。使用數(shù)值方法模擬水流在遇到阻礙后的流速變化,分析比較了不同規(guī)格的土工格室對(duì)湖泊流速的降低情況。結(jié)果表明:水流經(jīng)過(guò)土工格室后,湖底的流速有較大程度下降;土工格室上方區(qū)域流速隨格室高度增加而加快,土工格室后方底層區(qū)域流速大小隨著土工格室高度的增高而降低,土工格室能將其后方大部分區(qū)域內(nèi)的流速降低到"個(gè)別動(dòng)"起動(dòng)流速以下;增加土工格室長(zhǎng)度對(duì)流速影響幅度有限。
[Abstract]:There is a close relationship between lake eutrophication and endogenous release. Reducing the sediment resuspension caused by hydrodynamic effect can greatly reduce the release of endogenous pollutants in lakes. The numerical method is used to simulate the flow velocity changes after the obstruction of the water. The reduction of the flow rate of the lake with different specifications is analyzed and compared. The results show that the water flow through the geocell, the bottom velocity decreased significantly; geocell area above the cell height increases with the flow speed, the geocell rear bottom area of the flow velocity decreases with the increasing height of geogrid, geocell can be behind most of velocity within the area is reduced to "stop" starting velocity; increase the effect of geocell length on the limited range of velocity.
【作者單位】： 東南大學(xué)巖土工程研究所;江蘇省城市地下工程與環(huán)境安全重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃項(xiàng)目(2008CB418100)
【分類號(hào)】：X524
【正文快照】： 0引言隨著城市化進(jìn)程加快,工農(nóng)業(yè)迅速發(fā)展,氮、磷等營(yíng)養(yǎng)物質(zhì)大量進(jìn)入我國(guó)湖泊,湖泊富營(yíng)養(yǎng)化日益嚴(yán)重。以太湖為例,太湖在20世紀(jì)80年代初時(shí),平均水質(zhì)為Ⅱ類,但是當(dāng)進(jìn)入21世紀(jì)后,太湖的平均水質(zhì)降到了Ⅳ類,在某些局部地方的水體水質(zhì)已經(jīng)降到了Ⅴ類甚至劣Ⅴ類[1]。湖泊水體富營(yíng)養(yǎng)，

本文編號(hào)：1341546