scholarly journals SIMILARITY OF EQUILIBRIUM BEACH PROFILES

1972 ◽  
Vol 1 (13) ◽  
pp. 61 ◽  
Author(s):  
M.J. Paul ◽  
J.W. Kamphuis ◽  
A. Brebner
Keyword(s):  
Long Range ◽  
Scale Effect ◽  
Research Laboratory ◽  
Scaling Laws ◽  
Coastal Engineering ◽  
Two Dimensional ◽  
Engineering Research ◽  
Mobile Bed ◽  
Beach Processes ◽  
Distorted Model

In the design of mobile bed coastal models it is inherently assumed that prototype beach processes may be modelled using lightweight sediment. At the Queen's University Coastal Engineering Research Laboratory, a long range project is currently in progress to determine scaling laws and scale effect for mobile bed coastal models. A large portion of this program is directly concerned with beach profiles and in this paper preliminary work is reported, in which a comparison is made between two dimensional laboratory beach profiles obtained from controlled "prototype", undistorted model and some distorted model tests.

A study of the stability of dynamically stable breakwaters

1991 ◽  
Vol 18 (6) ◽  
pp. 916-925 ◽  
Author(s):  
K. R. Hall ◽  
Joseph S. Kao
Keyword(s):  
Research Laboratory ◽  
Coastal Engineering ◽  
Irregular Waves ◽  
Two Dimensional ◽  
Uniformity Coefficient ◽  
Engineering Research ◽  
Hydraulic Models ◽  
Wave Flume ◽  
The Stability ◽  
Dimensional Wave

The effect of gradation of armour stones and the amount of rounded stones in the armour on dynamically stable breakwaters was assessed in a two-dimensional wave flume. A total of 52 series of tests were undertaken at the Coastal Engineering Research Laboratory of Queen's University, Kingston, Canada using irregular waves. Profiles of the structure during the various stages of reshaping were measured using a semiautomatic profiler developed for this study. Four gradations of armour stones were used, giving a range in uniformity coefficient of 1.35–5.4. The volume of stones and the initial berm width required for the development of a stable profile, along with the extent to which the toe of the structure progressed seaward, were chosen as representative parameters of the reshaped breakwater. The results indicated that the toe width formed as a result of reshaping and the area of stones required for reshaping were dependent on the gradation of the armour stones. The initial berm width required for reshaping was also found to be dependent on the gradation and the percentage of rounded stones in the armour. Key words: breakwaters, dynamic stability, hydraulic models, stability, armour stones.

PERUBAHAN GARIS PANTAI DI TELUK PRIGI, KABUPATEN TRENGGALEK, JAWA TIMUR

2020 ◽  
Vol 2 (1) ◽  
pp. 16
Author(s):  
Khairana Ayu Shabrina ◽  
Rudi Siap Bintoro ◽  
Giman Giman
Keyword(s):  
Coastal Engineering ◽  
Research Center ◽  
Engineering Research ◽  
Water Index

<p>Teluk Prigi merupakan perairan di pesisir Samudera Hindia yang dikelilingi oleh bentang alam tebing yang tinggi sehingga wilayah pesisir yang memiliki kondisi dinamis dapat mengakibatkan terjadinya perubahan garis pantai apabila tidak dikelola dengan baik. Maka dari itu pada penelitian ini bertujuan untuk mengetahui faktor oseanografi yang menyebabkan terjadinya perubahan garis pantai. Metode yang digunakan terdiri dari pemisahan arus, peramalan gelombang, gelombang pecah, energi gelombang dan refraksi gelombang dengan menggunakan metode menurut <em>Coastal Engineering Research Center </em>(CERC). Selain itu ekstraksi garis pantai dengan metode <em>NDWI (Normal Differential Water Index)</em>, dan analisis jenis sedimen menggunakan modul yang dikeluarkan oleh Pusjatan Balitbang PU. Faktor oseanografi yang dominan menjadi penyebab perubahan garis pantai adalah gelombang bangkitan angin yang pola gelombangnya mengalami perubahan arah yang cenderung tegak lurus pantai, selain itu arus pasang surut menjadi faktor pendukung dengan kecepatan 0,0037 m/s bergerak menuju Utara. Sehingga, kondisi garis pantai pada tahun 2003 dan 2014, 2014 dan 2018 luasan sedimentasi terbesar mencapai 28.949 m<sup>2</sup> dan 52.020 m<sup>2</sup> yang berada di Desa Prigi. Sedangkan Sedangkan lokasi abrasi pada tahun 2003 dan 2014, 2014 dan 2018 luasnya mencapai 4.204 m<sup>2</sup> dan 3.326 m<sup>2</sup>.</p>

U.S. Army Coastal Engineering Research Center's Ecology Program

1984 ◽  
Vol 16 (3-4) ◽  
pp. 525-532
Author(s):  
E J Pullen ◽  
P L Knutson ◽  
A K Hurme
Keyword(s):  
Coastal Engineering ◽  
Coastal Vegetation ◽  
Army Corps ◽  
Army Corps Of Engineers ◽  
Engineering Research ◽  
Navigation Channel ◽  
Biological Environment ◽  
Ecology Program ◽  
The U.S ◽  
Shore Erosion

The Coastal Engineering Research Center at Fort Belvoir, Virginia, is responsible for research that supports the U.S. Army Corps of Engineers' Civil Works program. This research involves coastal navigation, channel design and maintenance, storm flooding, shore erosion control, and coastal ecology. The ecology research is focused on two major areas: (1) use of coastal vegetation for engineering purposes and (2) effects of coastal engineering activities on the biological environment. The objectives and accomplishments of the ecology research are discussed and specific examples of field guidance are presented.

scholarly journals Recovery of long-range order in two-dimensional charge density waves at high temperatures

2021 ◽  
Vol 27 (S1) ◽  
pp. 952-954
Author(s):  
Suk Hyun Sung ◽  
Yin Min Goh ◽  
Noah Schnitzer ◽  
Ismail El Baggari ◽  
Kai Sun ◽  
...  
Keyword(s):  
Charge Density ◽  
Long Range ◽  
High Temperatures ◽  
Charge Density Waves ◽  
Range Order ◽  
Long Range Order ◽  
Two Dimensional ◽  
Density Waves
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