本文選題：管道水流 + 巖溶含水層��； 參考：《中國巖溶》2017年03期

【摘要】：針對巖溶管道水流特征,選取廣西寨底巖溶流域為研究對象,分別采用三維有限差分地下水流動模型(MODFLOW)中的Drain和River模塊概化模擬巖溶管道特征,結(jié)合管道內(nèi)上游、中游及下游三個觀測孔對比分析兩種方法的適用性,結(jié)果表明:末期等水位線圖中位于管道兩側(cè)處流線均有形狀突變,符合實際管道水流動態(tài)特征,且能模擬出管道內(nèi)水位變化趨勢。最后分析兩種方法模擬管道水流的原理,Drain模塊中巖溶管道僅起排水作用,不允許管道內(nèi)水流流向周圍含水層,而River模塊允許巖溶管道水與周圍含水層水流交換,因而相對Drain模塊而言,應(yīng)用River模塊概化模擬巖溶管道更加精確。
[Abstract]:In view of the characteristics of karst pipeline flow, this paper selects the karst basin of Guangxi Zhai bottom as the research object, and simulates the characteristics of karst pipeline by using Drain and River modules in 3D finite difference groundwater flow model (MODFLOW) respectively, combined with the upstream of pipeline. The applicability of the two methods for comparing the three observation holes in the middle and lower reaches of the pipeline is analyzed. The results show that the streamlines on both sides of the pipeline have abrupt changes in shape in the final stage isowater level diagram, which accords with the dynamic characteristics of the actual pipeline flow. And it can simulate the variation trend of water level in pipeline. Finally, the principle of simulating pipeline flow by two methods is analyzed. The karst pipeline in the rain module only plays a drainage role and does not allow the flow in the pipeline to flow to the surrounding aquifer, while the River module allows the flow of karst pipeline water to exchange with the surrounding aquifer. Therefore, compared with Drain module, it is more accurate to use River module to generalize the simulation of karst pipeline.
【作者單位】： 中國地質(zhì)大學(xué)(北京)水資源與環(huán)境學(xué)院;中國地質(zhì)科學(xué)院巖溶地質(zhì)研究所/國土資源部廣西巖溶動力學(xué)重點實驗室;
【基金】：國家青年科學(xué)基金項目“巖溶基巖孔隙、裂隙、管道水流交換機理與三重空隙介質(zhì)數(shù)值模型研究”(41502252) 地質(zhì)調(diào)查項目“紅水河上游巖溶流域1∶5萬水文地質(zhì)環(huán)境地質(zhì)調(diào)查”(DD20160300)
【分類號】：P641.2

【參考文獻】

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本文編號：1953621