Comparison of Hydrographic Survey and Satellite Bathymetry in Monitoring Kerkini Reservoir Storage

2019 ◽  
Vol 6 (4) ◽  
pp. 1031-1049 ◽  
Author(s):  
I. Tsolakidis ◽  
M. Vafiadis
Keyword(s):  
Reservoir Storage ◽  
Hydrographic Survey ◽  
Satellite Bathymetry

scholarly journals A Novel Method on Hydrographic Survey Technology Selection Based on the Decision Tree Supervised Learning

2021 ◽  
Vol 11 (11) ◽  
pp. 4966
Author(s):  
Ivana Golub Medvešek ◽  
Igor Vujović ◽  
Joško Šoda ◽  
Maja Krčum
Keyword(s):  
Decision Tree ◽  
Supervised Learning ◽  
Autonomous Underwater Vehicle ◽  
Specific Area ◽  
Underwater Vehicle ◽  
Appropriate Technology ◽  
Technology Selection ◽  
Hydrographic Survey ◽  
Seabed Mapping ◽  
Novel Method

Hydrographic survey or seabed mapping plays an important role in achieving better maritime safety, especially in coastal waters. Due to advances in survey technologies, it becomes important to choose well-suited technology for a specific area. Moreover, various technologies have various ranges of equipment and manufacturers, as well as characteristics. Therefore, in this paper, a novel method of a hydrographic survey, i.e., identifying the appropriate technology, has been developed. The method is based on a reduced elimination matrix, decision tree supervised learning, and multicriteria decision methods. The available technologies were: remotely operated underwater vehicle (ROV), unmanned aerial vehicle (UAV), light detection and ranging (LIDAR), autonomous underwater vehicle (AUV), satellite-derived bathymetry (SDB), and multibeam echosounder (MBES), and they are applied as a case study of Kaštela Bay. Results show, considering the specifics of the survey area, that UAV is the best-suited technology to be used for a hydrographic survey. However, some other technologies, such as SDB come close and can be considered an alternative for hydrographic surveys.

scholarly journals Optimal Operation of Floodwater Resources Utilization of Lakes in South-to-North Water Transfer Eastern Route Project

2021 ◽  
Vol 13 (9) ◽  
pp. 4857
Author(s):  
Zitong Yang ◽  
Xianfeng Huang ◽  
Jiao Liu ◽  
Guohua Fang
Keyword(s):  
Water Level ◽  
Resource Utilization ◽  
Flood Control ◽  
Optimal Operation ◽  
Water Transfer ◽  
Water Levels ◽  
Reservoir Storage ◽  
Flood Season ◽  
Hongze Lake ◽  
North Water

In order to meet the demand of emergency water supply in the northern region without affecting normal water transfer, considering the use of the existing South-to-North Water Transfer eastern route project to explore the potential of floodwater resource utilization in the flood season of Hongze Lake and Luoma Lake in Jiangsu Province, this paper carried out relevant optimal operating research. First, the hydraulic linkages between the lakes were generalized, then the water resources allocation mode and the scale of existing projects were clarified. After that, the actual available amount of flood resources in the lakes was evaluated. The average annual available floodwater resources in 2003–2017 was 1.49 billion m3, and the maximum available capacity was 30.84 billion m3. Then, using the floodwater resource utilization method of multi period flood limited water levels, the research period was divided into the main flood season (15 July to 15 August) and the later flood season (16 August to 10 September, 11 September to 30 September) by the Systematic Clustering Analysis method. After the flood control calculation, the limited water level of Hongze Lake in the later flood season can be raised from 12.5 m to 13.0 m, and the capacity of reservoir storage can increase to 696 million m3. The limited water level of Luoma Lake can be raised from 22.5 m to 23.0 m (16 August to 10 September), 23.5 m (11 September to 30 September), and the capacity of reservoir storage can increase from 150 to 300 million m3. Finally, establishing the floodwater resource optimization model of the lake group with the goals of maximizing the floodwater transfer amount and minimizing the flood control risk rate, the optimal water allocation scheme is obtained through the optimization algorithm.

Characterization of trends in reservoir storage, streamflow, and precipitation in the Canadian River watershed in New Mexico and Texas

2015 ◽  
Vol 31 (1) ◽  
pp. 64-79 ◽  
Author(s):  
David Brauer ◽  
R. Louis Baumhardt ◽  
Dennis Gitz ◽  
Prasanna Gowda ◽  
James Mahan
Keyword(s):  
New Mexico ◽  
Reservoir Storage ◽  
River Watershed

Research on the hydrographic survey cycle for updating navigational charts

2021 ◽  
pp. 1-13
Author(s):  
Jing Duan ◽  
Xiaoxia Wan ◽  
Jianan Luo
Keyword(s):  
Neural Network ◽  
Bp Neural Network ◽  
Calculation Model ◽  
Impact Factors ◽  
Factors Affecting ◽  
Material Resources ◽  
Hydrographic Survey ◽  
Survey Planning ◽  
The Impact ◽  
The Relationship

Abstract Due to the vast ocean area and limited human and material resources, hydrographic survey must be carried out in a selective and well-planned way. Therefore, scientific planning of hydrographic surveys to ensure the effectiveness of navigational charts has become an urgent issue to be addressed by the hydrographic office of each coastal state. In this study, a reasonable calculation model of hydrographic survey cycle is established, which can be used to make the plan of navigational chart updating. The paper takes 493 navigational charts of Chinese coastal ports and fairways as the research object, analyses the fundamental factors affecting the hydrographic survey cycle and gives them weights, proposes to use the BP neural network to construct the relationship between the cycle and the impact factors, and finally establishes a calculation model of the hydrographic survey cycle. It has been verified that the calculation cycle of the model is effective, and it can provide reference for hydrographic survey planning and chart updating, as well as suggestions for navigation safety.

Discussion of “Some Factors Influencing Required Reservoir Storage”

1972 ◽  
Vol 98 (4) ◽  
pp. 717-718
Author(s):  
Edward M. Gosschalk ◽  
J. Stephen Colombi
Keyword(s):  
Reservoir Storage ◽  
Factors Influencing

Structural Analysis and Optimization of Hybrid Unmanned Amphibian Aerial Vehicle

2021 ◽  
Vol 13 (2) ◽  
Author(s):  
C. Gajendran ◽  
M.K. Padmanabhan ◽  
M. Dinesh ◽  
S. Vignesh ◽  
S. Rajesh ◽  
...  
Keyword(s):  
Water Quality ◽  
Structural Analysis ◽  
Water Quality Management ◽  
Bathymetric Survey ◽  
Operational Conditions ◽  
Remote Locations ◽  
Hydrographic Survey ◽  
Aerial Vehicle ◽  
Unmanned System ◽  
Related Application

Hybrid Unmanned Amphibian Aerial Vehicle (HUAAV) is a hybrid unmanned system consisting of a multi-rotor and a hovercraft. Water quality management, hydrographic survey, bathymetric survey and related application areas still employs time consuming and erroneous traditional methods of using boats to access the test sites. The application of unmanned systems will significantly increase the efficiency of this process by getting access to remote locations of both air and water. This paper deals with the design optimization and finite element structural analysis to validate the structural capability of the hybrid amphibian aerial vehicle for operational conditions. The Reserve Factors (RF) for all the components in the amphibian aerial vehicle are calculated and then optimized.

Poole Harbour: A Hydrographic Survey, 1938-39

1940 ◽  
Vol 96 (2) ◽  
pp. 126
Author(s):  
J. A. S. ◽  
F. H. W. Green
Keyword(s):  
Hydrographic Survey
Sign in / Sign up

Export Citation Format

Share Document