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Dissertations / Theses on the topic 'Scouring'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Caunce, James Frederick Physical Environmental &amp Mathematical Sciences Australian Defence Force Academy UNSW. "Mathematical modelling of wool scouring." Awarded by:University of New South Wales - Australian Defence Force Academy. School of Physical, Environmental and Mathematical Sciences, 2007. http://handle.unsw.edu.au/1959.4/38650.

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Wool scouring is the first stage of wool processing, where unwanted contaminants are removed from freshly shorn wool. In most scouring machines wool is fed as a continuous mat through a series of water-filled scour and rinse bowls which are periodically drained. The purpose of this project is to mathematically model the scour bowl with the aim of improving efficiency. In this thesis four novel models of contaminant concentration within a scour bowl are developed. These are used to investigate the relationships between the operating parameters of the machine and the concentration of contaminati

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2

Lu, Xue Fen. "Wool scouring and sludge incineration." Thesis, University of Huddersfield, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368210.

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au, C. Bath@murdoch edu, and Caroline Jacobson. "Scouring and Dag in Sheep in Western Australia." Murdoch University, 2006. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20070831.155237.

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Diarrhoea (scouring) in sheep increases the risk of faecal soiling of the breech (dag) that in turn causes significant production losses for sheep producers and increases susceptibility of sheep to breech blowfly strike. The common causes of scouring in sheep of post-weaning age in Western Australia have not been well described. In a written questionnaire sent to sheep producers in the south west of Western Australia, about half of the respondents reported lamb, hogget and ewe flocks with moderate or severe dag. Flocks with moderate or severe dag were reported more commonly in the winter

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Savage, Matthew John. "Integrated Treatment Processes For Primary Wool Scouring Effluent." Thesis, University of Canterbury. Chemical and Process Engineering, 2003. http://hdl.handle.net/10092/1125.

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The increasing cost of effluent treatment in the wool scouring industry is rapidly becoming a determining factor in the viability of existing scouring operations and new installations alike. This thesis details the development of an integrated effluent treatment process capable of treating the worst polluted effluent from a wool scour "heavy flow-down", to the point where it can either be economically discharged to local trade waste sewer, or directly discharged to river or ocean outfall with minimal environmental impact. The existing proprietary chemical flocculation process, Sirolan CF™, was

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Ibrahim, A. A. "Scour around pipeline under marine environments." Thesis, University of Newcastle Upon Tyne, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371255.

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Wong, Wai Yin. "The suitability of a rotating fluidised bed (RFB) for incineration and gasification." Thesis, University of Sheffield, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370081.

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7

Kerpicci, Kara Sibel. "Reliability-based Analysis Of Time-dependent Scouring At Bridge Abutments." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/3/12610334/index.pdf.

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Deterministic scour prediction equations for bridge abutments do not involve uncertainties coming from scouring parameters and they only consider effects of hydraulic parameters. However, in order to safely design bridge abutments, treatment of these uncertainties and evaluation of possible risks are required. Two artificial neural network (ANN) models are constructed to describe scouring phenomenon using the parameters of two different equations. The equation to be used in the reliability analysis is then determined according to ANN modeling results. To conduct reliability analysis, Monte Car

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8

Tregnaghi, Matteo. "Local scouring at bed sills under steady and unsteady conditions." Doctoral thesis, Università degli studi di Padova, 2008. http://hdl.handle.net/11577/3425036.

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Designers are often required to produce safe and economic structures in rivers with erodible beds, which may frequently induce scouring phenomena as they interfere with the natural stream. In CHAPTER 1, an extensive literature is illustrated on scouring by jets at high and low head structures, and predictive formulae are discussed that estimate the equilibrium scour depth of the scour hole, which are most obtained empirically from field and laboratory data. It is also discussed that different stages occur during local scour development. These stages basically include an initial rapid phase of

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Rapakgadi, Jim. "Detection of contaminants in wool bales using nuclear techniques." Thesis, Nelson Mandela Metropolitan University, 2009. http://hdl.handle.net/10948/993.

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To improve the quality and the marketability of wool and mohair, it is important to encourage, ensure and preferable certify that the baled fibre is free of contaminants. Anything other than the fibre that is within the bale can be classified as contaminants; this may be in the form of metal and wooden objects, plastic materials, paints, and vegetable matter such as grass and seed. The internationally accepted method for detecting and classifying these contaminants are highly labour intensive and costly. The ultimate goal of the present research is to develop a non-invasive and nondestructive

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10

Lim, S. Y. "Scour and particle diffusion caused by water jets." Thesis, University of Liverpool, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.356261.

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Setipa, Tsepang Benjamine. "Investigating the benefits of establishing a wool scouring plant in Lesotho." Thesis, Nelson Mandela Metropolitan University, 2017. http://hdl.handle.net/10948/20428.

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Lesotho’s current production of raw wool is sold to global markets through South African wool merchants. Lesotho does not have any wool processing facilities and as such, the wool from Lesotho gets processed in South Africa or sold to international markets like China where it is processed. Since 2012, the government of Lesotho has publicly showed interest in developing a wool scouring plant that would process locally produced wool instead of selling it in its raw unprocessed form to international markets. The understanding by the Lesotho government was underpinned by perceived economic benefit

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12

Welzel, Mario [Verfasser]. "Wave-current-induced scouring processes around complex offshore structures / Mario Welzel." Hannover : Gottfried Wilhelm Leibniz Universität, 2021. http://d-nb.info/1239419627/34.

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13

Al-Nassiri, A. M. S. H. "Scour downstream of rock-lined stilling basins." Thesis, University of Southampton, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.380040.

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14

Kouchakzadeh, Salah. "The local scouring phenomenon at bridge abutments terminating in the floodplain zone." Thesis, University of Ottawa (Canada), 1996. http://hdl.handle.net/10393/9915.

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This study examines the local scouring phenomenon associated with bridge abutments exposed to combined main-channel (MC) and floodplain (FP) flows. The principal goal of the study was to develop and validate, based on a comprehensive physical-model testing programme that considered different abutment shapes, an improved relationship for predicting maximum scour depth. A relationship was established among sediment size, flow depth and longitudinal channel slope for initiating the threshold condition of bed material movement. This relationship facilitated the selection of sediment size and chann

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15

Munteanu, Adrian. "Scouring around a cylindrical bridge pier under partially ice-covered flow condition." Thesis, University of Ottawa (Canada), 2004. http://hdl.handle.net/10393/26722.

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This thesis reports on the first step of an ongoing study of scouring around a cylindrical bridge pier under ice-cover conditions. Previous research confirmed that sediment transport decreases in ice-covered flow compared to free-surface flow. However, most of that research was conducted in a flow depth adjustment condition, maintaining constant the energy slope for both the ice-covered and the free-surface flow. This represents a valid hypothesis when an appropriate length scale is considered (i.e. long river reaches), but numerous other phenomena must be analyzed at a much shorter length sca

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Lyons, Simone. "An investigation into the initiation of local scouring around rectangular """"long"""" contractions." Master's thesis, University of Cape Town, 2003. http://hdl.handle.net/11427/5029.

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George, Beth, and b. george@curtin edu au. "Scouring the Thin City: an investigation into Perth through the medium of mapping." RMIT University. Architecture and Design, 2009. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20091006.103921.

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Perth, Western Australia - a city become region one hundred kilometres in length and expanding yet - is a place variously adored and scorned; one noted widely for its landscape and its horizon, and relatively rarely for its architecture. Young, low lying, and sparsely lined with built form, Perth might be described as a thin city. The intent of this research is to entreat an optimistic and inquisitive reading of the city of Perth through the conceptualisation of a set of six narrative threads. Six fictive interpretations of Perth, each denoting qualities of thinness, are cast toward the f

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Hersberger, Daniel S. "Wall roughness effects on flow and scouring in curved channels with gravel bed /." Lausanne, 2002. http://library.epfl.ch/theses/?display=detail&nr=2632.

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Thèse sciences techniques, EPF Lausanne, no 2632 (2002), Faculté Environnement naturel, architectural et construit ENAC, Domaine du génie civil. Directeur: A. Schleiss ; rapporteurs: M. Altinakar, G.-R. Bezzola, J. Gessler.

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Brun, Soren Erik. "Sequential scouring, alternating patterns of erosion and deposition, laboratory experiments and mathematical modelling." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape15/PQDD_0001/NQ35117.pdf.

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20

Charles, (nee Lapsirikul) Wipa. "Anaerobic bioflocculation as a mechanism for the removal of grease from wool scouring effluent." Thesis, Charles (nee Lapsirikul), Wipa (1994) Anaerobic bioflocculation as a mechanism for the removal of grease from wool scouring effluent. PhD thesis, Murdoch University, 1994. https://researchrepository.murdoch.edu.au/id/eprint/39184/.

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Effluent produced by the wool scouring process is highly polluted with emulsified grease, dirt particles, salts, and detergent. The major problem in treating this waste stream is the wool grease which is resistance to biodegradation. The removal of grease from the effluent would lead to a more readily degradable waste stream, and therefore suitable for further biological treatment processes. This study aimed to investigate anaerobic destabilisation (flocculation), rather than degradation, of wool grease emulsion from wool scouring effluent (WSE). The process therefore can serve as a pretreatme

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Poole, Andrew James. "Biological treatment of highly polluted industrial effluent: With application to the wool scouring industry." Thesis, Poole, Andrew James (1999) Biological treatment of highly polluted industrial effluent: With application to the wool scouring industry. PhD thesis, Murdoch University, 1999. https://researchrepository.murdoch.edu.au/id/eprint/52751/.

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The effluent from the scouring of raw wool is the most polluted in the textile processing industry. It consists of a stable emulsion of wool wax in an aqueous medium containing dissolved organic and inorganic pollutants. The typical concentration of solvent extractable material is 9000 mg/L with a chemical oxygen demand (COD) of 30000 mg/L. The effective treatment of this effluent is necessary to ensure the future environmental and economic sustainability of the wool industry, however the effluent has so far eluded any universally acceptable means of treatment. This study investigates two

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Melito, Gian Marco. "Analysis, modelling and design of a groin as coastal protection structure at Lido di Dante, Ravenna." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/14318/.

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An analysis and a subsequent solution is here presented. This document is about a groin design able to contrast the erosion actions given by waves in Lido di Dante. Advantages will be visible also for Fiumi Uniti's inlet, in the north side of the shoreline. Beach future progression and growth will be subjected to monitoring actions in the years after groin construction. The resulting effects of the design will have a positive impact not only on the local fauna and environment, but also, a naturalistic appeal will increase making new type of tourists coming not only for recreational purposes. T

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Eden, David Jason. "Ice scouring as a geologic agent, Pleistocene examples from Scarborough Bluffs and a numerical model." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0015/MQ53460.pdf.

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Rahman, Md Munsur. "STUDIES ON DEFORMATION PROCESS OF MEANDERING CHANNELS AND LOCAL SCOURING AROUND SPUR-DIKE-LIKE STRUCTURES." Kyoto University, 1999. http://hdl.handle.net/2433/181778.

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DEVI, GEETA. "SCOURING AROUND A GROUP OF PIERS." Thesis, 2023. http://dspace.dtu.ac.in:8080/jspui/handle/repository/19770.

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Scour is caused by the erosive action of flow of water, which erodes and takes away sediments from the river bed, as well as from the area of bridge piers and abutments. This process of scour is well-known for its complicated behaviour, and this process becomes more complex for the group of piers. As per the literature available, scour is a major contributor for the collapse of the bridge structures. Hence it becomes essential for the researches to predict the scour depth accurately. To fulfill this necessity, the deep understanding of the flow-field around the piers and factors af

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Liu, Chun-Guo, and 劉醇國. "Effect of Bed Scouring on Riverbank Stability." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/g7xq6t.

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碩士<br>國立交通大學<br>土木工程系所<br>101<br>In this study, a movable bed flume was set up. To make the conditions close to the natural rivers, the channel bank was paved with the cohesive material composed of the mixture of silica sand and kaolinite; the channel bed was paved with the noncohesive material of the silica sand. Several experimental cases with various inflows and angles of channel bank were conducted to investigate the influence of bed scouring to the time and distance of bank collapsing. Moreover, this study adopted a 2D Depth-Averaged Model (Hsieh, 2003) with adding bank scouring formula f

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Huang, Guo-Liang, and 黃國亮. "Developments and verifications of bridge scouring sensors." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/53748471573885510952.

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碩士<br>中原大學<br>土木工程研究所<br>102<br>Bridge scour is the major cause for many bridge failures and damage to piers and abutments. Scour is not easily discernible since it is hidden under the channel flow. Over the years, a number of sensors have been developed for detection of scour depth. Development, testing, and small-scale field implementation of a new and simple type of scour sensor in a flume are described in this study. The proposed sensor uses a MEMS accelerometer and attached to a reed which is fixed on the considered pier. The scour depth detection concept is based on observing the am

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Chi, Tsai Chin, and 蔡金吉. "Scouring at the head of a vertical wall." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/26575302754759770883.

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碩士<br>國立海洋大學<br>河海工程學系<br>90<br>The movable-bed physical models are used to discuss that the bed profile variation and scour at the front area of a vertical wall are tested by regular wave condition. In this study, the three different bed slope are 0、1/10 and 1/20 . The tests result show that the erosion zone take place in halfway between nodes and antinodes under standing wave field, and the center of zone from the vertical wall is about 1/8 wave length in the flat bed test. The accumulation zone occur in the nearby nodes of standing waves and the center point is about 1/4 wave length from th

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Po-ShinHuang and 黃柏勛. "Stability of Reinforced Dykes Subjected to Toe Scouring." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/77406742789910908619.

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碩士<br>國立成功大學<br>土木工程學系<br>103<br>SUMMARY The effect of toe scouring on the stability of geosynthetic-reinforced dykes was investigated using model dykes backfilled with an idealized 2-D backfill. In addition, the effect of reinforcement configuration was also investigated. The following conclusions were obtained: 1. The bearing capability against toe scouring and the resistance of backfill against can be significantly improved via the use of geosynthetic reinforcement. By increasing the length of reinforcement, especially for those near the base of the dyke, the above-mentioned effect can be f

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Liu, An-Kang, and 劉安剛. "Submerged Panels against Scouring for Bridge Abutment Protection." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/ndx676.

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碩士<br>國立成功大學<br>水利及海洋工程學系碩博士班<br>90<br>ABSTRACT The objective of this study is to reduce scour depth of abutments for protecting the bridge. To reduce scour around bridge abutments. Direct methods are used in literature, dealing with abutments-scour problems, such as placed rocks, riprap or flexible mattresses around the abutment foundation. This studies an indirect one that examines the effect of using submerged panels around the abutment. Experiments conducted in clear-water conditions. The angle of the panel is 135°, the width of the panel is 63 cm, the distance between panel and abutm

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Shih-Hsien, Peng, and 彭思顯. "The Local Scouring Phenomenon of Free Overfall Flow." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/37939767681426637470.

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Kuo, Ding Yuang, and 郭丁元. "Surface Panels against Scouring for Bridge Pier protection." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/39754143473181306523.

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碩士<br>國立成功大學<br>水利及海洋工程學系<br>82<br>The objective of this study is to reduce scour depth of piers for protecting the bridge. To reduce scour around bridge piers. Direct methods are used in literature,in dealing with pier-scour problems,such as streamlined piers, placed a collar around the pier ,placed rocks,riprap or flexible mattresses around the pier foundation. On the ether band,this studies an indirect one that examines the effect of using surface panels at the upstream of pie

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CHAUHAN, KAUSTUBH. "CFD STUDIES OF LOCAL SCOURING AROUND BRIDGE PIER." Thesis, 2019. http://dspace.dtu.ac.in:8080/jspui/handle/repository/16836.

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The threat of local scour around bridge piers has been in research for many years. According to the various studies, local scour around the bridge pier is the prime cause for most of the bridge failures. The main objective of the present study was to investigate the flow behavior and the scour phenomenon around the bridge piers of various shapes namely Circular, Elliptical, Square and Streamlined. Local scouring depends on various factors like depth of flow, upstream flow conditions, pier shape and dimensions. Here, we have taken only pier shape as the primary factor and kept other factors con

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Simpson, Alison Elizabeth. "The recovery of sodium hydroxide from cotton scouring effluents." Thesis, 1994. http://hdl.handle.net/10413/9111.

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This dissertation describes the characterisation of, and development of a novel integrated waste management strategy for, hydroxide scouring effluents produced during cotton processing. Such effluents are typical of mineral salt-rich waste waters which are not significantly biodegradable in conventional treatment plants. The proposed strategy focuses on two complementary concepts: process-oriented waste minimisation adopts a systematic approach to identifying potential problems and solutions of waste reduction in the manufacturing process itself; while add-on controls reduce the impact of the

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Ling-TingHuang and 黃令婷. "Potential of Adverse Effects of Pier Protection on Scouring." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/96493513534802313759.

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碩士<br>國立成功大學<br>土木工程學系碩博士班<br>98<br>Bridge to reduce the river cross section through the water, easy caused pier scour exposedness. Therefore the experimental used cone protection collar and small-scale experimental hydraulic models, then investigate the different to cross section through the water to aggravate piers scour of the effects extent. The experimental results of this thesis demonstrates, the protection collar of efficacy can explain that it can completely resist the down flow and the horseshoe vortex and reduce scour depth and will not effect reduced cross section through the ri

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Yan-PingLin and 林晏平. "Submerged CKPB for Scouring Control in the Bend Channel." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/39847307807596283350.

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碩士<br>國立成功大學<br>水利及海洋工程學系碩博士班<br>100<br>This paper is about protecting the bend channel by Submerged Cheng-Kung Porous Basket (CKPB) in the bend channel. In this paper, we set up Submerged CKPB of the OP’s upstream, and setting parameters to observed the scouring control in the bend. The result tell us the best, Row-Spacing = 8 cm, the Max-depth = 7.65 cm, the min-depth = -0.85 cm; Ld(A) = 0 cm, the Max-depth = 9.6 cm and the min-depth = 2.6 cm; Ld(B) = 0 cm, the Max-depth = 8.3 cm and Ld(B) = 2 cm, the min-depth = 3.2 cm; L(C) = 2 cm, the Max-depth = 8.3 cm, L(C) = 6 cm or 8 cm, the min-dept

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Fan, Wen-Kang, and 范文綱. "A local Scouring Monitoring and Safety Warning System of Bridge." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/e8exwg.

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碩士<br>國立中央大學<br>土木工程研究所<br>97<br>Scour is always the primary threat to bridges in Taiwan area. Since bridges will experience floods which may cause damage from scour holes forming around bridge piers and abutments. As scour changes the geometry of the bridge pier embedded in the soil foundation, the effects due to other loads, such as live load, wind load, debris collision, etc., are amplified. In this condition, bridge may have settlement or tipping even collapse. Therefore it is demanded by the bridge authority agencies to have a monitor sensor to determine the real-time scour depth. Besides

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Chen, Te-Lung, and 陳德龍. "An Application of Non-touch Measurement on Seabed Scouring Test." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/49679394905643476919.

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碩士<br>國立臺灣海洋大學<br>河海工程學系<br>92<br>In this study, a non-touch seabed scouring measurement technique was developed. Combine with laser beams, digital image processing, and coordinate adjustment skill, the device can measure the seabed profile remotely to prevent any disturbance on the seabed. The survey of time-varying topography in a large range can be done by repeating a simple procedure in high resolution and accuracy. From the application of the device on the hydraulic model test of seabed scouring in front of a vertical breakwater during the typhoon wave action period. The time varying

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Chiu, Hui-Ping, and 邱惠萍. "Studies the relationship between scouring depth and face slope of." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/59065845454765380655.

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Chen, Yen-You, and 陳彥酉. "Development of a Depth-Averaged Two-Dimensional Pier Scouring Model." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/32767061140556743096.

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碩士<br>國立交通大學<br>土木工程學系<br>99<br>This study develops a depth-averaged two-dimensional pier scouring model to simulate both the contraction scour and the local scour properties due to vertical flow. The framework of the model developed is based on the depth-averaged two-dimensional mobile bed model by Hsieh (2003), in which employed the immersed boundary method is to deal with the internal pier boundary. The maximum vertical flow velocity and the corresponding sediment transport formula are taken into account to simulate the local scour phenomenon. The maximum vertical velocity regression formul

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Wu, Wen-Ying, and 吳紋瑩. "Laboratory Investigation of Scouring Downstream of Two Grade-Control Structures." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/55277482956629771365.

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碩士<br>國立中興大學<br>土木工程學系所<br>100<br>River bed elevations of many rivers in the west of Taiwan have lowered down seriously and caused the exposures of pier foundations for the past few decades. The management bureaus often build grade-control structures to stabilize the river beds and reduce the scouring of pier foundations. There is an urgent need for the research of scouring downstream of grade-control structures. A series of experiment on the grade-control structures was conducted with different sand sizes and slopes for four kinds of flow discharges under steady and unsteady flow conditio

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尤俊傑. "Preliminary study on Effects of scouring on pile Foundation Performance." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/80634798214097210871.

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碩士<br>國立臺灣海洋大學<br>河海工程學系<br>101<br>Taiwan is located between The Philippines plate and The Eurasian plate. Due to orogenesis makes the Central Range of Taiwan becoming long and narrow from north to south. The river distribute east and west. Because Taiwan is located in typhoon area, when typhoon pass through, it makes heavy rainfall. This heavy rainfall often causes deluge, that makes river bed scouring and soil loss . As a result the corssed-river bridges are damaged. Due to the serious erosion problem, the foundation of bridge exposed above the river bed for several meters in all Taiwan

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YU, CHIA YUNG, and 游家勇. "Research on possibility of synthetic fabric scouring in lower temperature." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/6y5w6m.

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碩士<br>國立臺北科技大學<br>有機高分子研究所<br>105<br>In the manufacturing process of synthetic fabric, the oil, wax or size are used to increase the smoothness of the yarn and reduce friction. But the oil and size on the fabric are easy to appear the color spots, uneven color and size spots in the dyeing process. So we use scouring agent to remove the oil and size before the dyeing process of the fabric called the scouring process of the fabric. The scouring process of the fabric is applied in high temperature and 1~3 times washing in hot or cold water after scouring to make sure the oil removed is totally. I

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Liu, Stone, and 劉世桐. "An Experimental Study on Scouring Characteristics in front of Inclined Seawall." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/51147050639562387465.

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碩士<br>國立海洋大學<br>河海工程學系碩士在職專班<br>90<br>This experimental study was conducted in Department of Harbor and River Engineering of NATIONAL TAIWAN OCEAN UNIVERSITY. Which is aimed to understand the Scouring Characteristics in front of inclined seawall for the special case of normally-incident, regular non-breaking, partially reflected, two dimensional and uni-directional waves. Experimental proceeding combined 3 different inclined slopes （30、45 and 60 degree with horizontal plane, respectively） and 3 different wave propagating conditions （Period T=1.0 sec Wave Height H=5.4cm、T=1.2sec H=6.15cm and

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Chiu, Ming-Hung, and 邱銘鴻. "Experimental Study on Panel Effect to Sand Motion and Local Scouring." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/51415229301365868283.

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碩士<br>國立成功大學<br>水利及海洋工程學系<br>86<br>The aim of this experiment studies is undertaken to know the directions of sand motion and the positions of local scouring due to the effect of differentflow-training panels. It is known by experiments that the sand motion is caused by helix in a clockwise direction of the angle of attack is smallerthan -π/2, no matter how large the opening of the surface panel. The bottompanels have a critical height is about 0.5 times local water depth at des

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Fang, Yu-Yun, and 方于芸. "Study on Scouring Rate of Local Scour by Sloping Drop Structure." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/j84t6k.

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碩士<br>國立中興大學<br>土木工程學系所<br>105<br>For river management and water acquirement, drop structures are commonly set up in the river course. Although the stream channels can be stabilized, the gravel will not move downwards and its deposition near the drop structures increases the slope of upstream channel, consequently leads to a steep slope and induces fast flow. As a result, the large impact forces destroy the downstream protection work of drop structures. This study aims at the scouring rate of local scour and relevant scouring behavior by sloping drop structure. From the analyzed results, it in

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Chang, Pai-Hsin, and 張百欣. "Effect on surface roughness to toe scouring of a slope seawall." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/53347211122694925894.

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碩士<br>國立中興大學<br>土木工程學系<br>84<br>ABSTRACT The variation of the toe scours profile by the surface roughness of a slope seawall was investigated experimentally in this research. The effects of the roughness on the wave characteristics, including the wave run-up on the slope, the flow in the down-rushing wave and the wave reflection from the wall, are also explored. Two types of the toe scours, named the L-type and N-type, were performed in the experiments. It was fo

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Jan, Yuan-Haur, and 詹元豪. "Local Scouring to Single Pile and Pile Groups of Bridge Pier." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/79241168101427856530.

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Chang, Hui-Cheng, and 張惠成. "A Study of Modeling Processes of Fluvial Scouring and Sediment Transport." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/64675970343004268398.

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碩士<br>國立中興大學<br>土木工程學系所<br>104<br>Fluvial sedimentation and riverbed scour are crucial issues in Taiwan. In recent years, Taiwan has frequently influenced by climate change and heavy rains, resulted in serious fluvial scour problems. In general, mud has usually silted up in the upstream of main channel. And local scours are also occurred in midstream and downstream of river. Maximum scouring particularly happens at the location around bridge or span of channels. Fluvial disasters happened frequent in Dajia River in the past few years. Including downstream side of Shihgang Dam, Pifeng Bridge, N

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WU, CHENG-YE, and 吳承燁. "Study on Simulation of Flow Field and Scouring Depth in River." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/95094377246430922992.

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碩士<br>高苑科技大學<br>土木工程研究所<br>105<br>Taiwan is a narrow island, affected by topography and climatic factors, the slope of the river is very steep and the scouring of the riverbed is quite serious.It will make scour on bridge piers and will make bridge damage, the impact of transportation is very large. In this study, two-dimensional flow field was simulated by SMS for Laiser river and Checheng bridge of Pingtung County in Southern Taiwan. Simulation of scour depth and main deep trough change can verify the accuracy by the flow field. It can also provide references for related projects. In this st

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