scholarly journals FIELD OBSERVATION ON PROPAGATION OF LONG-PERIOD WAVES INTO A SMALL RIVER CHANNEL

2004 ◽  
Vol 48 ◽  
pp. 787-792
Author(s):  
Kazumi Kurihara ◽  
Takaaki UDA ◽  
Sumio NAMASUYA ◽  
Tairyu TAKANO ◽  
Yasuhiro OHKI ◽  
...  
Keyword(s):  
Field Observation ◽  
River Channel ◽  
Small River ◽  
Long Period

scholarly journals Field Observation of Long-period Waves in Hitachi Port as a Cause of Wave Run-up in River Channel

2008 ◽  
Vol 55 ◽  
pp. 211-215
Author(s):  
Yasutsugu KANDA ◽  
Takaaki UDA ◽  
Tetsuya HIRAISHI ◽  
Atsushi ITO ◽  
Toru WATANABE ◽  
...  
Keyword(s):  
Field Observation ◽  
River Channel ◽  
Long Period ◽  
Run Up

SOURCES OF THE BASIN COMPONENT OF THE SEDIMENT YIELD ON THE SMALL RIVER IN THE FOOTHILL-LOWLAND ZONE OF THE BLACK SEA COAST OF THE CAUCASUS (USING THE EXAMPLE OF THE TSANYK RIVER)

2018 ◽  
Vol 12 (7-8) ◽  
pp. 62-74 ◽  
Author(s):  
N. N. IVANOVA ◽  
V. N. GOLOSOV ◽  
A. S. TSYPLENKOV ◽  
YU. S. KUZNETSOVA ◽  
D. V. BOTAVIN
Keyword(s):  
Black Sea ◽  
Sediment Yield ◽  
Catchment Area ◽  
River Channel ◽  
Small River ◽  
The Black Sea ◽  
The Caucasus ◽  
Sediment Removal ◽  
Black Sea Coast ◽  
Sea Coast

Тhis study aims to evaluate features of the formation and sources of the basin component of the sediment yield during flash floods. Measuring campaigns were conducted in the weakly disturbed section of the Tsanyk River basin, located in the Greater Sochi area in the foothill-lowland zone of the Caucasus Black Sea coast. We used a set of field and calculation methods, including sediment dating with application of 137Cs, pin method, Yang's method, erosion modeling and others techniques for determining the rate of denudation and deposition processes. We investigated the processes of local and long-distance sediment movement. It was established that the rate of creep is 2-2.2 cm/year, the intensity of scree processes varies depending on the rock types in the range 1-3.5 cm/year. The processes of sheet erosion and linear erosion contribute to the movement of part of the eroded material from the catchment area to the river channel. Four types of slopes and slope catchments are distinguished according to the features of a sediment delivery from the catchment area to the river channel. The average annual sedimentation rate in the gully fan is amounted to 2.3 cm/year since 1986. At the same time, on the basis of studying the accumulative deposits of the gully fan, including the content of the 137Cs isotope in the different layers, it was established that the main sources of sediments are material produced by gully erosion, scree processes and slopes settling. 5-6 episodes of catastrophic sediment removal occurred in this particular slope catchment for 30-year period. The ratio between a sediment removal from the slope catchments to the river channel and the measured sediment yield in the Tsanyk River during the rain floods of low repeatability makes it possible to state that the basin component of sediment yield is at least 75% of the total. Information about the ratio of slopes and slope catchments of various types within the small river basins of the subtropical belt of the Black Sea coast of the Caucasus should be taken into account when calculating engineering structures for protecting infrastructure facilities from the impact of flash floods or mudflows.

scholarly journals POSSIBILITY OF APPLICATION OF PHOTOGRAMMETRY AND RIVER CHANNEL PLANNING USING DIGITAL AERIAL CAMERAS FOR MIDDLE AND SMALL RIVER

2012 ◽  
Vol 68 (4) ◽  
pp. I_1399-I_1404
Author(s):  
Tetsuya OOISHI ◽  
Yuichi KAYABA ◽  
Eito KASE ◽  
Satoshi WATANABE ◽  
Hiroki TAKAOKA
Keyword(s):  
River Channel ◽  
Small River

scholarly journals Characteristics of Long Period Waves by Field Observation and Statistical Analysis of It's Propagation in Harbor

1997 ◽  
Vol 13 ◽  
pp. 147-152 ◽  
Author(s):  
Youichi Atsumi ◽  
Yoshiki Wakayama ◽  
Atushi Kunita ◽  
Shin-ichirou Sekiguchi ◽  
Katsutoshi Kimura ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Field Observation ◽  
Long Period

scholarly journals FIELD OBSERVATION ON LONG-PERIOD MOTIONS OF MOORED VESSEL AND ITS NUMERICAL SIMULATION

1999 ◽  
Vol 15 ◽  
pp. 77-82
Author(s):  
Katsuyuki ASAZAKI ◽  
Norichika MATSUO ◽  
Akiyuki UKAI ◽  
Yoichi MORIYA ◽  
Masanori TSUGANE
Keyword(s):  
Numerical Simulation ◽  
Field Observation ◽  
Long Period

FIELD OBSERVATION ON LONG-PERIOD WAVES AT A NEARSHORE AREA OF THE JAPAN SEA DURING WINTER

2001 ◽  
Vol 17 ◽  
pp. 31-36
Author(s):  
Tadashi NAKAHATA ◽  
Toshihiro OCHIAI ◽  
Hirohiko KASHIWABARA ◽  
Tsunehiro SEKIMOTO ◽  
Masaki HANAYAMA
Keyword(s):  
Field Observation ◽  
Japan Sea ◽  
Nearshore Area ◽  
Long Period ◽  
The Japan Sea

On nearly-commensurable periods in the restricted problem of three bodies, with calculations of the long-period variations in the interior 2:1 case

1966 ◽  
Vol 25 ◽  
pp. 197-222 ◽  
Author(s):  
P. J. Message
Keyword(s):  
Periodic Solution ◽  
Periodic Solutions ◽  
Large Amplitude ◽  
Restricted Problem ◽  
Small Amplitude ◽  
Minor Planets ◽  
Long Period ◽  
Numerical Integrations ◽  
Period Variations ◽  
The Mean

An analytical discussion of that case of motion in the restricted problem, in which the mean motions of the infinitesimal, and smaller-massed, bodies about the larger one are nearly in the ratio of two small integers displays the existence of a series of periodic solutions which, for commensurabilities of the typep+ 1:p, includes solutions of Poincaré'sdeuxième sortewhen the commensurability is very close, and of thepremière sortewhen it is less close. A linear treatment of the long-period variations of the elements, valid for motions in which the elements remain close to a particular periodic solution of this type, shows the continuity of near-commensurable motion with other motion, and some of the properties of long-period librations of small amplitude.To extend the investigation to other types of motion near commensurability, numerical integrations of the equations for the long-period variations of the elements were carried out for the 2:1 interior case (of which the planet 108 “Hecuba” is an example) to survey those motions in which the eccentricity takes values less than 0·1. An investigation of the effect of the large amplitude perturbations near commensurability on a distribution of minor planets, which is originally uniform over mean motion, shows a “draining off” effect from the vicinity of exact commensurability of a magnitude large enough to account for the observed gap in the distribution at the 2:1 commensurability.

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