EXAMINATION OF THE EFFECTIVENESS OF THE UAV PHOTOGRAMMETRY IN THE SHALLOW AREA OF THE SHINJI LAKE

2020 ◽  
Vol 76 (2) ◽  
pp. I_1033-I_1038
Author(s):  
Nozomu ONAKA ◽  
Shinya YASUGI ◽  
Yoshihisa AKAMATSU
Keyword(s):  
Shallow Area

scholarly journals TIDE AND TIDAL CURRENT IN THE BALI STRAIT, INDONESIA

2015 ◽  
Vol 36 (2) ◽  
pp. 25-36 ◽  
Author(s):  
Dessy Berlianty ◽  
Tetsuo Yanagi
Keyword(s):  
Tidal Current ◽  
Ecological Model ◽  
Current Model ◽  
Spring Tide ◽  
Residual Flow ◽  
Tidal Front ◽  
Shelf Seas ◽  
Shallow Area ◽  
Tidal Constituents ◽  
Tide And Tidal Current

Tide and tidal current model of the Bali Strait in Indonesia is produced by using a Coupled Hydrodynamical-Ecological Model for Regional and Shelf Seas (COHERENS). With its resolutions in the horizontal (500meters) and the vertical (4layers), the model well reproduces the four major tidal constituents, namely M2, S2, K1, and O1 tides, and their currents. Furthermore the model is used to investigate the tide-induced residual flow and tidal front in the Bali Strait. As a results, the tide-induced residual flow in the Bali Strait during the spring tide on May 16th in 2010 can be attributed to the variation of the strength of two eddies. The first one is the clockwise circulation in the shallow area at the wide part of the strait, while the second one is the small clockwise circulation in the south of the narrow strait. On the other hand, as suggestion from Simpson and Hunter (1974), the tidal front is determined by the value of log(H/U3) (where is the water depth in meters and the amplitude oftidal current amplitude in ms-1). The front detected by the image of sea surface temperature distribution from the satellite corresponds with the contour log(H/U3) of 6.5.

scholarly journals Aquatic macrophytes of Itaipu Reservoir, Brazil: survey of species and ecological considerations

1999 ◽  
Vol 42 (1) ◽  
Author(s):  
Sidinei Magela Thomaz ◽  
Luis Maurício Bini ◽  
Maria Conceição de Souza ◽  
Kazue Kawakita Kita ◽  
Antonio Fernando Monteiro Camargo
Keyword(s):  
Eichhornia Crassipes ◽  
Aquatic Macrophytes ◽  
Submerged Macrophytes ◽  
Pistia Stratiotes ◽  
Light Penetration ◽  
Nutrient Input ◽  
Emergent Macrophytes ◽  
Nuisance Species ◽  
Shallow Area ◽  
Egeria Najas

In a survey of the aquatic macrophytes of the Itaipu Reservoir, we identified 62 taxa in 25 families and 42 genera. The highest number taxa was observed for the emergent macrophytes (40 taxa). Reduced fluctuation in water level, increased light penetration, and sediment enrichment by nutrients and organic matter following the formation of the reservoir favored the appearance of a species-rich community of submerged macrophytes (23% of the taxa identified). The aquatic macrophytes were found mainly near the mouths of the main tributaries of the reservoir, in shallow area of depth less than 2 meters. In addition to the shallow depth, the greater nutrient input from the tributaries and relative protection from wind explained this distribution. Among the species found, Egeria najas merits mention for its occurrence in all localities sampled, with biomass values varying between 98 and 186 gDW/m². Some potential nuisance species such as Eichhornia crassipes, Salvinia auriculata, and Pistia stratiotes also deserve attention, since they were also observed to be covering large areas of Itaipu Reservoir.

The Distribution Laws of Interlayer-Gliding Structure Controlled by Panji Anticline and the Research of Quantitative Evaluation in Seams

2012 ◽  
Vol 204-208 ◽  
pp. 3-9
Author(s):  
Qi Lang Le
Keyword(s):  
Coal Mine ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Mining Area ◽  
Fracture Type ◽  
Comprehensive Evaluation Method ◽  
Geological Conditions ◽  
Shallow Area ◽  
Gliding Structure

Based on the research of interlayer-gliding structures in Panbei and Panji No.1 coal mine that are located in the each wing of Panji anticline, the Panji mining area is divided into 9 main interlayer-gliding areas and 29 sub-regions. The results indicate that the interlayer-gliding structures mainly developed in the anticline wings, which show obvious symmetry at the type and distribution. The types of the interlayer-gliding structures are fault-sliding and corrugation type in the wings and fracture type in the core area. The type and manifestation of the interlayer-gliding structures also show symmetry in the similar depth. From up to down, the interlayer-gliding type show obvious regularity that fracture type is mainly developed in the shallow area, down is fault-sliding type and corrugation type is mainly developed in the deep or the interchange of the faults. Take fuzzy comprehensive evaluation method to evaluate the inter-gliding structure in west area of Panji No.1 coal mine. The results showed that the results from using fuzzy comprehensive assessment were similar with the results exposed by coal mine. Good effects were obtained for predicting the development intensity of the seam-gliding structure in deep unmined areas in combination with geological conditions of coal mine, providing references for production arrangement of coal mine.

scholarly journals Uncertainty and sensitivity in optode-based shelf-sea net community production estimates

2016 ◽  
Vol 13 (4) ◽  
pp. 943-959 ◽  
Author(s):  
Tom Hull ◽  
Naomi Greenwood ◽  
Jan Kaiser ◽  
Martin Johnson
Keyword(s):  
Open Source Software ◽  
Accurate Estimation ◽  
Net Community Production ◽  
Open Source Software Package ◽  
Shelf Sea ◽  
Shallow Area ◽  
Dynamic Regions ◽  
Vulnerable Habitats ◽  
Net Heterotrophy ◽  
Community Production

Abstract. Coastal seas represent one of the most valuable and vulnerable habitats on Earth. Understanding biological productivity in these dynamic regions is vital to understanding how they may influence and be affected by climate change. A key metric to this end is net community production (NCP), the net effect of autotrophy and heterotrophy; however accurate estimation of NCP has proved to be a difficult task. Presented here is a thorough exploration and sensitivity analysis of an oxygen mass-balance-based NCP estimation technique applied to the Warp Anchorage monitoring station, which is a permanently well-mixed shallow area within the River Thames plume. We have developed an open-source software package for calculating NCP estimates and air–sea gas flux. Our study site is identified as a region of net heterotrophy with strong seasonal variability. The annual cumulative net community oxygen production is calculated as (−5 ± 2.5) mol m−2 a−1. Short-term daily variability in oxygen is demonstrated to make accurate individual daily estimates challenging. The effects of bubble-induced supersaturation is shown to have a large influence on cumulative annual estimates and is the source of much uncertainty.

scholarly journals Morphology and ecology of bivalve molluscs from Admiralty Bay, King George Island, Antarctica

1998 ◽  
Vol 41 (4) ◽  
pp. 437-446 ◽  
Author(s):  
Theresinha M. Absher ◽  
Angela R. Feijó
Keyword(s):  
Shell Thickness ◽  
Sea Water ◽  
Energy Partitioning ◽  
Bivalve Species ◽  
King George Island ◽  
Bivalve Molluscs ◽  
Small Individual ◽  
Admiralty Bay ◽  
Shallow Area ◽  
Individual Size

Bivalve species were collected from shallow coastal areas of King George Island (Martel, Mackellar and Ezcurra Inlets of Admiralty Bay). Twenty one species belonging to 16 genera and 12 families were identified and their morphometric and morphological shell characteristics were described. Three main characteristics were found to be common to the majority of the bivalve species sampled: 1) thin fragile shells; 2) small size of individuals (76%), and 3) the lack of true cardinal teeth (72%). Comparison of calcium data from a tropical estuary and a subantarctic coastal shallow area suggested that the calcium in the sea water was not a constraint to shell building but shell thickness could be an adaptation to the efficiency of energy partitioning. Small individual size and the lack of true cardinal teeth are discussed in relation to a high deposition environment and widespread mud bottoms.

scholarly journals Geological and oceanographic data determining the foreshore zone according to the Greek legislation

2006 ◽  
Vol 7 (1) ◽  
pp. 15
Author(s):  
K.G. PEHLIVANOGLOU ◽  
M. RAPPOU ◽  
M. MARTSOUKOU
Keyword(s):  
Wave Field ◽  
Coastal Area ◽  
Field Data ◽  
Case Law ◽  
Standard Case ◽  
Official Gazette ◽  
Shallow Area ◽  
Oceanographic Data ◽  
Run Up

The available scientific field data of the marine and the coastal enviroment, (wind and wave field data, shallow area bathymetry, coastal area geomorphology and topography, etc.), in addition to deep and shallow wave prediction numerical modelling (by means of wind and bathymetry measurements), calculation of the nearshore wave height and maximum wave run up, were used to support the mapping of the innermost limit of the foreshore zone according to Greek legislation which defi nes that ‘the foreshore is the zone of land wetted by the highest however unexceptional sea wave run up’ and the Supreme Administrative Court standard case law. These methods were applied for two areas, which completely differ as regards the wind and the wave field, the geomorphological and topographical characteristics of the coastal area, suggesting different procedures for the determination of the innermost limit of the foreshore zone. The limits of the foreshore zones for both areas, resulting from the study, are compared to the limits set out by the authorised Administrative Commissions, which were published in the Official Gazette and also were applied by the local authorities for the management of the coastal area.

scholarly journals The foreshore zone determination according to the Greek legislation, using geologic and océanographie data

2007 ◽  
Vol 40 (4) ◽  
pp. 1609
Author(s):  
K. G. Pehlivanoglou ◽  
M. Martsoukou
Keyword(s):  
Wave Field ◽  
Coastal Area ◽  
Field Data ◽  
Standard Case ◽  
Official Gazette ◽  
Near Shore ◽  
Coastal Area Management ◽  
Shallow Area ◽  
Run Up

The available scientific field data of the marine and the coastal enviroment, (the wind and the wave field data, the shallow area bathymetry, the coastal area geomorphology and topography, etc.), joint to deep and shallow wave prediction numerical modelling (by means of the wind and bathymetry measurements), calculation of the near shore wave height and maximum wave run up, were used to support the mapping of the innermost limit of the foreshore zone, according to the Greek legislation which defines that "the foreshore is the zone of land wetted by the highest however unexceptional sea wave run up " and the Supreme Administrative Court standard case law. These methods applied for two areas, which completely differ for the wind and the wave field, the géomorphologie and topographic characteristics of the coastal area, proposing different procedures for the determination of the innermost limit of the foreshore zone. The proposed limits of the foreshore zones for both areas, resulted from the study, are compared to the limits proposed by the authorised Administrative Commissions, which were published in the Official Gazette and also were applied by the local authorities for the coastal area management

scholarly journals Effect of Using Steelmaking Slag and the Estuary Dredged Sediment for the Restoration of Shallow Area

2017 ◽  
Vol 40 (6) ◽  
pp. 247-253
Author(s):  
Shinya NAKAHARA ◽  
Kiyonori HIRAOKA ◽  
Yuhei OMICHI ◽  
Takashi TSUCHIDA ◽  
Hideaki KOBAYASHI ◽  
...  
Keyword(s):  
Steelmaking Slag ◽  
Dredged Sediment ◽  
Shallow Area
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