教師資料查詢 | 類別: 期刊論文 | 教師: 戴璽恆 DAI, HSI-HENG (瀏覽個人網頁)

標題:Delta progradation driven by an advancing sediment source: Coupled theory and experiment describing the evolution of elongated deltas
學年97
學期2
出版(發表)日期2009/06/01
作品名稱Delta progradation driven by an advancing sediment source: Coupled theory and experiment describing the evolution of elongated deltas
作品名稱(其他語言)
著者Kim, Wonsuck; Dai, Albert; Muto, Tetsuji; Parker, Gary
單位淡江大學水資源及環境工程學系
出版者Hoboken: Wiley-Blackwell Publishing, Inc.
著錄名稱、卷期、頁數Water Resources Research 45(6), W06428(16pages)
摘要Most of the models of alluvial fan and delta morphodynamics to date have used one of two assumptions concerning the upstream boundary condition: (1) a fixed sediment feed point at the vertex or (2) a feed point corresponding to a bedrock-alluvial transition that, e.g., migrates upstream under conditions of constant base level. Here, however, we present both experimental and numerical results pertaining to a new configuration, i.e., one in which the sediment feed point migrates downstream. The research is motivated by the operation of the tailings pond of a mine in which a delta forms. The mine operators must frequently move the outfalls of their slurry pipelines downstream to avoid their burial under sediment as the delta aggrades. This downstream migration results in a characteristic delta configuration. Under the right conditions, as the tailings delta progrades downstream, it does not have time to fill all the available space in the lateral direction, thus leaving unfilled open water on either side. The result is the formation of an elongated delta. Here we use both experiments and numerical modeling to characterize the control of the feed point migration rate on the lateral extent of the prograding deltas. We use these results to obtain a partial explanation of natural elongated deltas. In the case of such deltas, the downstream progradation of natural levees provides an analog to the downstream migration of the outfall of a slurry pipeline.
關鍵字delta; sediment transport; delta modeling
語言英文
ISSN1944-7973
期刊性質國外
收錄於SCI;EI
產學合作
通訊作者
審稿制度
國別美國
公開徵稿
出版型式電子版
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