scholarly journals INTERRELATIONSHIP BETWEEN RIVER WATER LEVEL AND OCEANIC TIDE DURING 2018 WESTERN JAPAN FLOODS: FIELD SURVEY AND NUMERICAL ANALYSIS

2019 ◽  
Vol 75 (1) ◽  
pp. 1-9
Author(s):  
Hiroshi TAKAGI ◽  
Luc HENRY ◽  
Takumi MIZUOCHI
Keyword(s):  
Numerical Analysis ◽  
Water Level ◽  
River Water ◽  
Field Survey ◽  
Western Japan

EXAMINATION OF COUNTERMEASURES OF INUNDATION DUE TO HEAVY RAIN BY NUMERICAL ANALYSIS AND OBSERVATION OF THE SEWER WATER LEVEL IN KASUGAI CITY

2019 ◽  
Vol 75 (2) ◽  
pp. I_1267-I_1272
Author(s):  
Masataka MURASE ◽  
Makoto TAKEDA ◽  
Takuya YAGAMI ◽  
Toshihiko TAKAHASHI ◽  
Kouhei OYA ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Water Level ◽  
Heavy Rain ◽  
Sewer Water

REAL-TIME ANORMALY DETECTION OF RIVER WATER LEVEL OBSERVATION BASED ON PROBABILITY DISTRIBUTION OF WATER LEVEL ESTIMATION ERROR

2019 ◽  
Vol 75 (2) ◽  
pp. I_193-I_198
Author(s):  
Masayuki HITOKOTO ◽  
Noriko KAWAGOE ◽  
Hajime HASHIDA ◽  
Yuichi SEI ◽  
Kazutomo FUSAMAE
Keyword(s):  
Probability Distribution ◽  
Water Level ◽  
Real Time ◽  
River Water ◽  
Estimation Error

River Water Level Prediction in Coastal Catchment using hybridized relevance vector machine model with improved grasshopper optimization

2021 ◽  
pp. 126477
Author(s):  
Hai Tao ◽  
Najah Kadhim Al-Bedyry ◽  
Khaled Mohamed Khedher ◽  
Shamsuddin Shahid ◽  
Zaher Mundher Yaseen
Keyword(s):  
Water Level ◽  
River Water ◽  
Relevance Vector Machine ◽  
Machine Model ◽  
Grasshopper Optimization ◽  
Water Level Prediction

scholarly journals Analysis of Pore Water Pressure and Piping of Hydraulic Well

Water ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 502
Author(s):  
Jinman Kim ◽  
Heuisoo Han ◽  
Yoonhwa Jin
Keyword(s):  
Numerical Analysis ◽  
Water Level ◽  
Pore Water ◽  
Large Scale ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Hydraulic Gradient ◽  
Water Levels ◽  
Seepage Velocity ◽  
Seepage Analysis

This paper shows the results of a field appliance study of the hydraulic well method to prevent embankment piping, which is proposed by the Japanese Matsuyama River National Highway Office. The large-scale embankment experiment and seepage analysis were conducted to examine the hydraulic well. The experimental procedure is focused on the pore water pressure. The water levels of the hydraulic well were compared with pore water pressure data, which were used to look over the seepage variations. Two different types of large-scale experiments were conducted according to the installation points of hydraulic wells. The seepage velocity results by the experiment were almost similar to those of the analyses. Further, the pore water pressure oriented from the water level variations in the hydraulic well showed similar patterns between the experiment and numerical analysis; however, deeper from the surface, the larger pore water pressure of the numerical analysis was calculated compared to the experimental values. In addition, the piping effect according to the water level and location of the hydraulic well was quantitatively examined for an embankment having a piping guide part. As a result of applying the hydraulic well to the point where piping occurred, the hydraulic well with a 1.0 m water level reduced the seepage velocity by up to 86%. This is because the difference in the water level between the riverside and the protected side is reduced, and it resulted in reducing the seepage pressure. As a result of the theoretical and numerical hydraulic gradient analysis according to the change in the water level of the hydraulic well, the hydraulic gradient decreased linearly according to the water level of the hydraulic well. From the results according to the location of the hydraulic well, installation of it at the point where piping occurred was found to be the most effective. A hydraulic well is a good device for preventing the piping of an embankment if it is installed at the piping point and the proper water level of the hydraulic well is applied.

scholarly journals AN ARCHITECTURAL ADAPTATION STRATEGY FOR THE DYNAMICS OF THE KAHAYAN RIVER’S WATER LEVEL AT KAMPUNG PAHANDUT, PALANGKA RAYA CITY

2017 ◽  
Vol 1 (04) ◽  
pp. 379-398
Author(s):  
Alifi Diptya Nidikara; Giosia Pele Widjaja
Keyword(s):  
Water Level ◽  
River Water ◽  
Adaptation Strategy ◽  
Adaptation Strategies ◽  
Activity Data ◽  
Starting Point ◽  
Data Collection Technique ◽  
High Degree ◽  
The City ◽  
Dry And Rainy Seasons

Abstract- Kalimantan (Borneo) is famous as the island of a Pulau Seribu due to the large number of rivers that run across its cities. One of the longest is the Kahayan river that flows through the city of Palangka Raya. The river as an important aspect in Kalimantan people’s life has made it the starting point for the embryo of a city in the form of river side dwellings that keeps on developing amidst the dynamics of the Kahayan river that undergoes a high degree of change in terms of water level during the dry and rainy seasons. The issue that arises is the addition and loss of space due to the changes of the river water level. The purpose of this research is to describe the adaptation strategies used by the writer in Kampung Pahandut that is unique when compared other kampongs (villages) due to its condition of having dry and flooded streets in the dwelling area. This research is qualitative in nature, employing the narrative descriptive method. The data collection technique uses purposive sampling to collect the physical and activity data. The physical and activity data were gained through a survey of the research object as well as picture taking, field observation, as well as the medium ofinterviews conducted with the Kampung Pahandut villagers. The data was then processed by classifying the numerous changes that had happened in both physical and activity-related terms as well as analyzing and concluding the adaptation strategies. It was found that in Kampung Pahandut there were both physical and activity-related changes as efforts to accommodate its people to enable them to survive the dry and flooding condition due to the changes of the river water level. Within these efforts there was also architectural adaptation based on the study consisting of three adaptation strategies, namely: being adjustable, refittable, and movable. Keywords: architectural adaptation, changes in water level, Kahayan River, Kampung Pahandut

scholarly journals Aurantimicrobium minutum gen. nov., sp. nov., a novel ultramicrobacterium of the family Microbacteriaceae, isolated from river water

2015 ◽  
Vol 65 (Pt_11) ◽  
pp. 4072-4079 ◽  
Author(s):  
Ryosuke Nakai ◽  
Tomoya Baba ◽  
Hironori Niki ◽  
Miyuki Nishijima ◽  
Takeshi Naganuma
Keyword(s):  
River Water ◽  
Sequence Similarity ◽  
Rrna Gene ◽  
Phenotypic Characteristics ◽  
High Sequence Similarity ◽  
The Family ◽  
Western Japan ◽  
Unidentified Species ◽  
Diamino Acid ◽  
Ph Range

A Gram-stain-positive, aerobic, non-motile, curved (selenoid), rod-shaped actinobacterium, designated KNCT, was isolated from the 0.2 μm-filtrate of river water in western Japan. Cells of strain KNCT were ultramicrosized (0.04–0.05 μm3). The strain grew at 15–37 °C, with no observable growth at 10 °C or 40 °C. The pH range for growth was 7–9, with weaker growth at pH 10. Growth was impeded by the presence of NaCl at concentrations greater than 1 %. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain KNCT showed relatively high sequence similarity (97.2 %) to Alpinimonas psychrophila Cr8-25T in the family Microbacteriaceae. However, strain KNCT formed an independent cluster with cultured, but as-yet-unidentified, species and environmental clones on the phylogenetic tree. The major cellular fatty acids were anteiso-C15 : 0 (41.0 %), iso-C16 : 0 (21.8 %), C16 : 0 (18.0 %) and anteiso-C17 : 0 (12.9 %), and the major menaquinones were MK-11 (71.3 %) and MK-12 (13.6 %). The major polar lipids were phosphatidylglycerol and two unknown glycolipids. The cell-wall muramic acid acyl type was acetyl. The peptidoglycan was B-type, and contained 3-hydroxyglutamic acid, glutamic acid, aspartic acid, glycine, alanine and lysine, with the latter being the diagnostic diamino acid. The G+C content of the genome was unusually low for actinobacteria (52.1 mol%), compared with other genera in the family Microbacteriaceae. Based on the phenotypic characteristics and phylogenetic evidence, strain KNCT represents a novel species of a new genus within the family Microbacteriaceae, for which the name Aurantimicrobium minutum gen. nov., sp. nov. is proposed. The type strain of the type species is KNCT ( = NBRC 105389T = NCIMB 14875T).

scholarly journals RIVER WATER LEVEL PREDICTION FROM RAINFALL

2010 ◽  
Vol 66 (1) ◽  
pp. 93-98
Author(s):  
Toru HIRAOKA ◽  
Masataka IKARI ◽  
Hiromi YUKI
Keyword(s):  
Water Level ◽  
River Water ◽  
Water Level Prediction

Annual and Daily Changes of River Water Level at Breves and Caxiuan^|^atilde;, Amazon Estuary

1998 ◽  
Vol 71 (2) ◽  
pp. 100-105 ◽  
Author(s):  
Noboru HIDA ◽  
Jos^|^eacute; Guilherme MAIA ◽  
Osamu SHIMMI ◽  
Mario HIRAOKA ◽  
Nobuaki MIZUTANI
Keyword(s):  
Water Level ◽  
River Water ◽  
Amazon Estuary ◽  
Daily Changes
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