基于二维数值模拟的库区急弯分汊河段演变规律分析-(5650)

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1、万方数据dividedintothedepositionzone．sedimenttransportzoneanderosionzone．Whentheflowvelocitywaslessthan0．5m／s，sedimentdeposited；Whentheflowvelocitywasmorethan1．1m／s．sedimentwerewashedaway；whentheflowvelocitywasbetween0．5m／sand1．1m／s．neithererosionnordeposi

2、tionoccurred．Accordingtothemethod，theTllreeGorgesReservoirsedimentmovementequationandbeddeformationequationwerederived．Therationalityoftheequationswereconfirmedthroughmathematicalmodel，andtheywereappliedtothestudyonthebraidedriverwithsharpbend．Throughm

3、athematicalmodel，thereasonablenessoftheapplicationoftheequationwasconfirmed．Accordingtotheresults，theaccumulativedepositionamount，changeoftypicalsections，depositionstrengthalongtheriver，developmentofmlwegandcontourmapsofdepositionthicknessofHuanghuache

4、ngriverinthenext20yearswereprovidedinthispaper．ThroughtheresultswecouldknowthattheleftbranchofHuanghuachengriverwasstillthemainpartwheresedimentdepositionwasserious，andthefocusgraduallytransferredtowardsexportoftheleftbranch．Thedepositionrateofthefight

5、branchwererelativelyslow．Thedepositionstateofthefiverwouldstillremain，butthedepositionratewouldslowdownuntilbalance．KEYWORDS：braidedriverwithsharpbend；fieldmeasurement；flumeexperiment；two-dimensionalnumericalsimulation；evolutionlawIV万方数据目录第一章绪论⋯．．．．⋯．．

6、．．⋯．．⋯．．⋯⋯⋯．⋯．．．11．1三峡库区概况⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11．2急弯分汉河流特性分析⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯21．2．1急弯分汊河流特点⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯21．2．2河床演变影响因素⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．41．2．3研究意义⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯51．3研究方法比较与选取⋯⋯⋯⋯．⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯一51．3．1常用研究方法⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯51．3．2数

7、学模型比较⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．61．3．3数值计算方法⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．71．3．4二维数学模型的研究进展⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．91．4研究内容⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．10第二章库区泥沙输移特性研究。．．⋯⋯⋯⋯。．⋯。．。．122．1库区泥沙输移特点⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．122．2现场测量⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．132．2．1现场测量主要内容⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯

8、⋯⋯⋯142．2．2测量断面布置⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯142．2．3测量位置水位概况⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯152．2．4现场测量结果分析⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．162．3冲淤流速分布水槽试验研究⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．192-3．1试验设备⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯192．3．2试验设计⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．222．3．3试验结果与分析⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯