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Journal articles on the topic 'Hydrographic'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Foroutan, Mina, Sonja Bhatia, and Geneviève Béchard. "The Hydrographer of the Future - Reflections on an international virtual workshop." International Hydrographic Review 28 (November 1, 2022): 172–80. http://dx.doi.org/10.58440/ihr-28-n12.

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The Canadian Hydrographic Service (CHS) expects the skillsets of its multidisciplinary hydrographers to evolve as the field of hydrography undergoes a digital transformation. To characterize these changes, the CHS organized a virtual workshop titled Hydrographer of the Future, in which it heard the perspectives of international colleagues in other Hydrographic offices (HO’s), industry, and academia. Despite some variations, common themes emerged: the changing technological context, people and culture, and the future role of hydrography. The results of this workshop support the CHS’ own interna

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Nakabayashi, Shigeru. "East Asia Hydrographic Commission - Fifty Years of Progress." International Hydrographic Review 27 (May 1, 2022): 99–112. http://dx.doi.org/10.58440/ihr-27-n06.

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The year 2021 marks the 50th anniversary of the East Asia Hydrographic Commission (EAHC). It was established in 1971 as the third oldest Regional Hydrographic Commission located in East Asia. Since then, EAHC has progressed in cooperation of hydrographic services and in development of hydrographic technology for navigation safety and other aims. This article describing comprehensive historical steps and efforts of a Regional Hydrographic Commission in an important area of maritime transport will present readers a suggestive model of regional cooperation in hydrography. One of the suggestions c

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Firsov, Yu G. "Problems and tasks for the development of the Russian standards and requirements for engineering and design hydrographic surveying." Vestnik Gosudarstvennogo universiteta morskogo i rechnogo flota imeni admirala S. O. Makarova 16, no. 5 (2024): 663–78. https://doi.org/10.21821/2309-5180-2024-16-5-663-678.

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The current state and issues of standardization of hydrographic surveys performed for engineering purposes on inland water areas, coastal zone of the seas and continental shelf examined. There is a variety of existing regulatory documents based on outdated norms and rules of traditional analog hydrography issued more than forty years ago. There are a number of regulatory documents governing the survey of the bottom relief in order to ensure hydraulic construction, dredging, construction of structures on the continental shelf, as well as special surveys on the downstream of hydroelectric power

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Guimarães, Marcia Maria, and Thiago de Castro Guimarães. "Evaluation of drainage hydro credit implementation in the Vargem Grande stream basin in Montes Claros, Minas Gerais, Brazil." CONTRIBUCIONES A LAS CIENCIAS SOCIALES 17, no. 8 (2024): e9985. http://dx.doi.org/10.55905/revconv.17n.8-497.

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The urbanization process generally increases impermeable surfaces, reduces rain infiltration, increases the volume of surface runoff and the frequency of urban flooding. The Vargem Grande stream basin, object of this study, has a waterproofing of 64.94% of its area of about 18 km². The channel on Vicente Guimarães avenue where the basin's outflow is located has a drainage system that quickly directs the runoff to the bottom of the valley, where some flooding has already been observed. This article will assess the need to implement the Drainage Hydro credit, with the objective of reducing the g

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Stoykov, Evgeni. "HYDROGRAPHIE ACOUSTIC SYSTEMS - MEASUREMENT PRINCIPLES." Journal Scientific and Applied Research 24, no. 1 (2023): 32–37. http://dx.doi.org/10.46687/jsar.v24i1.365.

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Hydrography is an applied science that deals with the study of the bottom and shores of the world ocean (all oceans and seas), lakes, rivers and dams, i.e. all natural and artificial water bodies. Hydrographic research is the study of individual areas of the hydrosphere, including the design, implementation of hydrographic works, processing and analysis of the collected data.

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Urbahs, Aleksandrs, Rima Mickevičienė, Vasilij Djačkov, et al. "Analysis of an Unmanned Aerial Vehicle Monitoring System for Resurveying of Shipping Routes." Transport and Aerospace Engineering 3, no. 1 (2016): 102–11. http://dx.doi.org/10.1515/tae-2016-0012.

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Abstract The paper gives brief description of the conventional and innovative hydrography survey methods and constraints connected with the realization. Proposed hydrographic survey system based on the use of Unmanned Aerial and Maritime systems provides functionality to conduct hydrographic measurements and environment monitoring. System can be easily adapted to fulfil marine safety and security operations, e.g. intrusion threat monitoring, hazardous pollutions monitoring and prevention operations, icing conditions monitoring.

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Elsobeiey, Mohamed Elsayed. "Performance of Network Real-Time Kinematic in Hydrographic Surveying." Journal of Marine Science and Engineering 13, no. 1 (2025): 61. https://doi.org/10.3390/jmse13010061.

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The main objective of this paper is to investigate the performance of the Network Real-time Kinematic (NRTK) technique in hydrographic surveying and check whether it meets the International Hydrography Organization (IHO) minimum bathymetry standards for the safety of navigation hydrographic surveys. To this end, the KAU-Hydrography 2 vessel was used to conduct a hydrographic survey session at Sharm Obhur. NRTK corrections were streamed in real time from the KSA-CORS NTRIP server and GNSS data were collected at the same time at the base station using a Trimble SPS855 GNSS receiver. Multibeam re

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Government of Canada, Fisheries and Oceans Canada (DFO). "New appointment of the Hydrographer General of Canada and Director General of the Canadian Hydrographic Service." International Hydrographic Review 29, no. 2 (2023): 273. http://dx.doi.org/10.58440/ihr-29-2-i01.

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Samsonov, Timofey E. "Automated Conflation of Digital Elevation Model with Reference Hydrographic Lines." ISPRS International Journal of Geo-Information 9, no. 5 (2020): 334. http://dx.doi.org/10.3390/ijgi9050334.

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Combining misaligned spatial data from different sources complicates spatial analysis and creation of maps. Conflation is a process that solves the misalignment problem through spatial adjustment or attribute transfer between similar features in two datasets. Even though a combination of digital elevation model (DEM) and vector hydrographic lines is a common practice in spatial analysis and mapping, no method for automated conflation between these spatial data types has been developed so far. The problem of DEM and hydrography misalignment arises not only in map compilation, but also during th

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Haslam, David. "The Duke of Edinburgh Lecture: International Hydrography." Journal of Navigation 46, no. 2 (1993): 159–73. http://dx.doi.org/10.1017/s0373463300011516.

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It is perhaps appropriate, on this the exact 187th anniversary of the death of Admiral Lord Nelson at Trafalgar and in the year in which so many celebrations have taken place to commemorate the 500th anniversary of Christopher Columbus's arrival somewhere in the West Indies, to consider the progress which has been made towards international co-operation and achievements in hydrographic surveying and nautical cartography, particularly since the formation of the International Hydrographic Bureau in 1921, and to look at the problems facing international hydrography in the immediate future.

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Firsov, Yu G. "Modern digital hydrography and the new international hydrographic organisation bathymetric survey standards." Vestnik Gosudarstvennogo universiteta morskogo i rechnogo flota imeni admirala S. O. Makarova 16, no. 1 (2024): 17–36. http://dx.doi.org/10.21821/2309-5180-2024-16-1-17-36.

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The current state of the International Hydrographic organization bathymetric survey Standards S44 (6.1.0) is examined in this study. The introduction of the S44 survey Standards fourth edition in 1998 heralded the beginning of a new era of modern digital hydrography based on the concept of the survey orders resulting from implementation of the Global Navigation Satellite Systems of positioning and hydrographic information systems. The fundamental changes between the 4th and 6th editions of the Standards for Hydrographic Surveys (S-44) are described. The differences between the 5th and 6th edit

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Gorziglia, Hugo. "The establishment of the Hydrographic and Oceanographic Service of the Chilean Navy (SHOA) – A succinct chronological account of its 150 years." International Hydrographic Review 30, no. 2 (2024): 158–67. https://doi.org/10.58440/ihr-30-2-n07.

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On May 1, the Hydrographic and Oceanographic Service of the Chilean Navy (SHOA; Fig. 1), formerly the Hydrographic Institute of the Navy (IHA), celebrated 150 years since its foundation. To illustrate to the reader the significance that Hydrography has had in the history of Chile, it is necessary to highlight the steps taken from its discovery until the eighteenth century; and then go on to recount the transcendent events that have occurred up to the present day. This work would not be complete without the inclusion of the challenging prospect that will have to be faced in the immediate future

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Akpınar, Burak, and Nedim Onur Aykut. "Determining the Coordinates of Control Points in Hydrographic Surveying by the Precise Point Positioning Method." Journal of Navigation 70, no. 6 (2017): 1241–52. http://dx.doi.org/10.1017/s0373463317000236.

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After Global Navigation Satellite Systems (GNSS) were first used in the field of hydrography in 1980, developments in hydrographic surveying accelerated. Survey precision in hydrography has been improved for both horizontal and vertical positioning and seafloor acoustic measurement by means of these new developments. Differential Global Positioning System (DGPS), Real Time Kinematic (RTK) and Network RTK (NRTK) techniques are the satellite-based positioning techniques that are commonly used in shallow water surveys and shoreline measurements. In line with these developments, the newer Precise

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Specht, Cezary. "Maritime DGPS System Positioning Accuracy as a Function of the HDOP in the Context of Hydrographic Survey Performance." Remote Sensing 15, no. 1 (2022): 10. http://dx.doi.org/10.3390/rs15010010.

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The Differential Global Positioning System (DGPS) is a marine navigation system operating at frequencies of 283.5–325 kHz, which is now the primary method for locating vessels in coastal shipping, as well as hydrography and mapping systems worldwide. Its positioning accuracy is determined by the following: the pseudorange error to Global Positioning System (GPS) satellites, the age of pseudorange corrections, and the value of the Horizontal Dilution Of Precision (HDOP), which, in terms of accuracy, is crucial in positioning using GPS satellites. In 2020, the International Hydrographic Organiza

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Voss, Rüdiger, Hans-Harald Hinrichsen, Daniel Stepputtis, et al. "Egg mortality: predation and hydrography in the central Baltic." ICES Journal of Marine Science 68, no. 7 (2011): 1379–90. http://dx.doi.org/10.1093/icesjms/fsr061.

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Abstract Voss, R., Hinrichsen, H-H., Stepputtis, D., Bernreuther, M., Huwer, B., Neumann, V., and Schmidt, J. O. 2011. Egg mortality: predation and hydrography in the central Baltic. – ICES Journal of Marine Science, 68: 1379–1390. Cod and sprat are the dominant fish species in the Baltic pelagic ecosystem, both of great economic importance and ecologically strongly interlinked. Management of both species is challenged by highly variable recruitment success. Recent studies have identified predation and hydrographic conditions during the egg phase to be of critical importance. Two years of exte

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Atkinson, Larry P., Thomas N. Lee, Jackson O. Blanton, and Gustav-Adolf Paffenhöfer. "Hydrographic observations." Progress in Oceanography 19, no. 3-4 (1987): 231–66. http://dx.doi.org/10.1016/0079-6611(87)90010-3.

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Hecht, Horst. "Hydrographic GIS." International Hydrographic Review 29, no. 1 (2023): 158–62. http://dx.doi.org/10.58440/ihr-29-a11.

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-. "HYDROGRAPHIC OBSERVATIONS." Treubia 4 (March 7, 2025): 16–39. https://doi.org/10.14203/treubia.v4i0.1648.

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Nunes, Paulo, João Vicente, Ana Leonor Veiga, et al. "Hydrographic open data for society." REVISTA INTERNACIONAL MAPPING 32, no. 211 (2023): 34–48. http://dx.doi.org/10.59192/mapping.393.

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Hydrography is defined as: “The branch of applied sciences which deals with the measurement and description of the physical features of oceans, seas, coastal areas, lakes and rivers, as well as with the prediction of their change over time, for the primary purpose of safety of navigation and in support of all other marine activities, including economic development, security and defence, scientific research, and environmental protection” (Publication S-32). Due to their broad concept hydrographic data and information provide the foundational bases for marine space management, fisheries, coastal

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Stanislawski, Lawrence V., Ethan J. Shavers, Shaowen Wang, et al. "Extensibility of U-Net Neural Network Model for Hydrographic Feature Extraction and Implications for Hydrologic Modeling." Remote Sensing 13, no. 12 (2021): 2368. http://dx.doi.org/10.3390/rs13122368.

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Accurate maps of regional surface water features are integral for advancing ecologic, atmospheric and land development studies. The only comprehensive surface water feature map of Alaska is the National Hydrography Dataset (NHD). NHD features are often digitized representations of historic topographic map blue lines and may be outdated. Here we test deep learning methods to automatically extract surface water features from airborne interferometric synthetic aperture radar (IfSAR) data to update and validate Alaska hydrographic databases. U-net artificial neural networks (ANN) and high-performa

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Sperrevik, A. K., K. H. Christensen, and J. Röhrs. "Observing and modeling currents on the continental slope: assimilation of high frequency radar currents and hydrography profiles." Ocean Science Discussions 11, no. 3 (2014): 1357–90. http://dx.doi.org/10.5194/osd-11-1357-2014.

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Abstract. Assimilation of High Frequency (HF) radar current observations and CTD hydrography is performed with the 4D-Var analysis scheme implemented in the Regional Ocean Modeling System (ROMS). We consider both an idealized case, with a baroclinic slope current in a periodic channel, and a realistic case for the coast of Vesterålen in Northern Norway. In the realistic case the results of the data assimilation are compared with independent data from acoustic profilers and surface drifters. Best results are obtained when background error correlation scales are small (10 km or less) and when th

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Harrex, Emily, and Emily Tidey. "Breaking Waves: A snapshot of women in hydrography in the South-West Pacific." International Hydrographic Review 31, no. 1 (2025): 52–64. https://doi.org/10.58440/ihr-31-1-a04.

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Only 25 % of qualified hydrographers are women. Here we present a case-study of South-West Pacific women in hydrography from three perspectives: 1) women in hydrography, 2) hydrographic employers, and 3) an undergraduate. Results show the largest barrier is the lack of information about hydrography in schools and universities. Other findings indicate challenges such as a culture of stereotyping, not enough “champions”, discrimination, and time away. Recommendations include better promotion of the profession, developing role-models and industry considerations. Suggested further research directi

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Grabbert, Peter, Mirko Bothe, and Patrick Westfeld. "Spatiotemporal analysis of satellite imagery using AI-based optical hydrography for adaptive planning of hydrographic resources." International Hydrographic Review 30, no. 2 (2024): 12–29. https://doi.org/10.58440/ihr-30-2-a15.

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Demand-driven and resource-efficient hydrographic surveying requires prior knowledge of the variability of the seabed. This paper presents an approach to obtain this prior knowledge of changes in seabed topography by means of bathymetric data derived from less accurate but high frequency multispectral satellite imagery and a change analysis based on it. This approach is designed to be implemented as a fully automated operational service at the German Federal Maritime and Hydrographic Agency to provide decision support for the operational planning of hydrographic surveying. Spectrally-derived b

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Sanz-Ramos, Marcos, Ernest Bladé, Fabián González-Escalona, Gonzalo Olivares, and José Luis Aragón-Hernández. "Interpreting the Manning Roughness Coefficient in Overland Flow Simulations with Coupled Hydrological-Hydraulic Distributed Models." Water 13, no. 23 (2021): 3433. http://dx.doi.org/10.3390/w13233433.

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There is still little experience on the effect of the Manning roughness coefficient in coupled hydrological-hydraulic distributed models based on the solution of the Shallow Water Equations (SWE), where the Manning coefficient affects not only channel flow on the basin hydrographic network but also rainfall-runoff processes on the hillslopes. In this kind of model, roughness takes the role of the concentration time in classic conceptual or aggregated modelling methods, as is the case of the unit hydrograph method. Three different approaches were used to adjust the Manning roughness coefficient

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Altić, Mirela. "From Coast to Coast: The Mapping of the Adriatic Sea by the Joint Forces of the Austro-Hungarian and Italian Hydrographic Offices." Abstracts of the ICA 1 (July 15, 2019): 1. http://dx.doi.org/10.5194/ica-abs-1-7-2019.

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<p><strong>Abstract.</strong> With the establishment of the second Austrian rule on the eastern Adriatic coast (1815), after several centuries, the Adriatic Sea was divided between two sides – Italian (Papal States and Kingdom of Two Sicilies) which ruled the western Adriatic coast, and the Austrian, which ruled the eastern coast and Lombardy-Venetia. Such division of the Adriatic Sea between the two powers in constant tension adversely affected the dynamics of mapping, and in the mid-19th century, there was a serious setback in mapping. In the 1860s, the strengthening of Ita

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Lewicka, Oktawia, Mariusz Specht, Andrzej Stateczny, et al. "Analysis of GNSS, Hydroacoustic and Optoelectronic Data Integration Methods Used in Hydrography." Sensors 21, no. 23 (2021): 7831. http://dx.doi.org/10.3390/s21237831.

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The integration of geospatial data in hydrography, performed using different measurement systems, involves combining several study results to provide a comprehensive analysis. Each of the hydroacoustic and optoelectronic systems is characterised by a different spatial reference system and the method for technical implementation of the measurement. Therefore, the integration of hydrographic data requires that problems in selected fields of electronics, geodesy and physics (acoustics and optics) be solved. The aim of this review is to present selected fusion methods applying the data derived fro

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Zhang, Yizhong, Chunji Yin, Changxi Zheng, and Kun Zhou. "Computational hydrographic printing." ACM Transactions on Graphics 34, no. 4 (2015): 1–11. http://dx.doi.org/10.1145/2766932.

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Marmer, Harry A. "Hydrographic datum planes." International Hydrographic Review 29, no. 1 (2023): 96–103. http://dx.doi.org/10.58440/ihr-29-a10.

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Stanislawski, L. V., E. J. Shavers, A. J. Duffy, et al. "SCALING-UP DEEP LEARNING PREDICTIONS OF HYDROGRAPHY FROM IFSAR DATA IN ALASKA." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLVIII-4/W1-2022 (August 6, 2022): 449–56. http://dx.doi.org/10.5194/isprs-archives-xlviii-4-w1-2022-449-2022.

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Abstract. The United States National Hydrography Dataset (NHD) is a database of vector features representing the surface water features for the country. The NHD was originally compiled from hydrographic content on U.S. Geological Survey topographic maps but is being updated with higher quality feature representations through flow-routing techniques that derive hydrography from high-resolution elevation data. However, deriving hydrography through flow-routing methods is a complex process that needs to be tailored to different geographic conditions, which can lead to varying solutions. To addres

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Rondeau, Mathieu, Michel Breton, Gabriel Montpetit-Allard, Michel Leger, Yan Bilodeau, and Johnny Kasudluak. "From volunteer ping to community map - The CHS’ Community Hydrography Program." International Hydrographic Review 30, no. 1 (2024): 64–77. http://dx.doi.org/10.58440/ihr-30-1-a07.

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To support coastal communities in collecting and using bathymetric data in the nearshore areas they depend on for travel, hunting, and fishing, the Canadian Hydrographic Service (CHS) launched its Community Hydrography Program in 2022. The Program was developed by examining the successes and shortcomings in the documentation of past community hydrography initiatives. Its method focuses on the timely generation of results, namely to maintain project participants’ motivation and engagement. A use case demonstrates how community-collected bathymetry data paired with satellite data led to the crea

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Saville, Jr., Thorndike, and Joseph M. Caldwell. "ACCURACY OF HYDROGRAPHIC SURVEYING IN AND NEAR THE SURF ZONE." Coastal Engineering Proceedings 1, no. 3 (2000): 3. http://dx.doi.org/10.9753/icce.v3.3.

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The analysis and solution of most beach erosion problems are based to a significant degree on the quantitative changes in the bottom hydrography as observed in successive surveys. Critical decisions as to the dominant direction of littoral drift, the average rate of this drift, and the onshore-offshore movement of material are based largely on such hydrographic surveys. As the net changes between successive surveys are usually small compared to the area being studied, the degree of accuracy or comparability of the hydrographic surveys is of considerable importance. For instance, a net change o

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Boudani, Mustapha Rabie, Mohamed Mazour, Hichem Mazighi, and Omar Djoukbala. "Development of a minimalist conceptual numerical model for flood forecasting and management under GIS environment." Journal of Water and Climate Change 11, S1 (2020): 359–86. http://dx.doi.org/10.2166/wcc.2020.265.

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Abstract The floods that Algeria has experienced in recent years are among the most significant natural disasters recorded by the country. These disasters, whose amplitude and frequency have tended to become increasingly irregular in space and time, in the current context of global climate change, encourage us to improve our flood management and forecasting strategies, notably through the re-evaluation of protection structure capacities, designed on the basis of hydrological data analyzed by statistical adjustment of past rainfall hazards. The objective of this study is to develop a minimalist

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Duan, Jing, Xiaoxia Wan, and Jianan Luo. "Research on the hydrographic survey cycle for updating navigational charts." Journal of Navigation 74, no. 4 (2021): 750–62. http://dx.doi.org/10.1017/s0373463320000776.

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AbstractDue 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 rese

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Guiu, Octavian, Cristina Maerescu, Radu Brejea, Nicu Cornel Sabau, and Ioana Borza. "ASPECTS REGARDING THE NATURAL DIVERSITY IN THE SOMEŞUL MARE HYDROGRAPHIC BASIN, BISTRIȚA NĂSĂUD COUNTY, ROMANIA." Natural Resources and Sustainable Development 14, no. 1 (2024): 117–28. http://dx.doi.org/10.31924/nrsd.v14i1.154.

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The Someșului Mare hydrographic basin is a component part of the Someșului hydrographic basin, with an area of 15.740 km2, which, in turn, is part of the Someș-Tisa hydrographic basin. The hydrological heritage has economic, scientific, ecological, educational, socio-cultural and aesthetic, the hydrological diversity, given the density of the hydrographic network is remarkable. This hydrodiversity is closely related to the geological constitution, the configuration of the relief; climatic peculiarities, the structure of the living world (plants and animals), human activities. This diversity of

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Elsobeiey, M. "PERFORMANCE ANALYSIS OF LOW-COST SINGLE-FREQUENCY GPS RECEIVERS IN HYDROGRAPHIC SURVEYING." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-4/W5 (October 5, 2017): 67–71. http://dx.doi.org/10.5194/isprs-archives-xlii-4-w5-67-2017.

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The International Hydrographic Organization (IHO) has issued standards that provide the minimum requirements for different types of hydrographic surveys execution to collect data to be used to compile navigational charts. Such standards are usually updated from time to time to reflect new survey techniques and practices and must be achieved to assure both surface navigation safety and marine environment protection. Hydrographic surveys can be classified to four orders namely, special order, order 1a, order 1b, and order 2. The order of hydrographic surveys to use should be determined in accord

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da Silva Brito, Maiara Tábatha, Leidiane Pereira Diniz, Ully M. Pozzobom, Victor Lemes Landeiro, and Francisco Diogo R. Sousa. "Cladocera (Crustacea: Branchiopoda) from the state of Mato Grosso, Brazil." Annales de Limnologie - International Journal of Limnology 56 (2020): 7. http://dx.doi.org/10.1051/limn/2020005.

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Studies on Cladocera biodiversity in Brazilian freshwater ecosystems are intensifying. However, the fauna of some hydrographic regions is still poorly known. We investigated the richness and species composition of cladocerans in lakes of the Pantanal from the state of Mato Grosso (Paraguay hydrographic region), Brazil. In addition, we cataloged the known cladoceran species in each hydrographic region of the state. Occurrence data were obtained from the literature and samples collected from 50 lakes in the northern Pantanal. We recorded 120 cladoceran species from eight families in the state of

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Ivanovic, Radomir, Marko Ivanovic, and Mrdjan Djokic. "Hydrographic resources of Ibarski Kolasin in the function of tourism development." Glasnik Srpskog geografskog drustva 91, no. 1 (2011): 117–34. http://dx.doi.org/10.2298/gsgd1101117i.

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Hydrographic objects (hydrograph) of a territory may be an important natural potential for tourism development. Ibarski Kolasin is a territory in northern Kosovo. Very poor in economic terms. Development of tourism activities in this area, it could be a significant source of income. Accumulation Gazivode is remarkably fit into the landscape, and together with the surrounding mountains, Mokra Gora and Rogozna, represents a specific geographical areas, which could be excellent tourist realized.

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Masetti, Giuseppe, Tyanne Faulkes, Matthew Wilson, and Julia Wallace. "Effective Automated Procedures for Hydrographic Data Review." Geomatics 2, no. 3 (2022): 338–54. http://dx.doi.org/10.3390/geomatics2030019.

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Reviewing hydrographic data for nautical charting is still a predominately manual process, performed by experienced analysts and based on directives developed over the years by the hydrographic office of interest. With the primary intent to increase the effectiveness of the review process, a set of automated procedures has been developed over the past few years, translating a significant portion of the NOAA Office of Coast Survey’s specifications for hydrographic data review into code (i.e., the HydrOffice applications called QC Tools and CA Tools). When applied to a large number of hydrograph

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Stoykov, Evgeni. "DATA QUALITY FOR HYDROGRAPHIC MEASUREMENTS." Journal Scientific and Applied Research 21, no. 1 (2021): 26–30. http://dx.doi.org/10.46687/jsar.v21i1.314.

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The topic of preservation of cultural heritage is very important and is an integral part of National Security. It is up-to-date and timely. Its significance is determined by the scale and intensity of criminal attacks on cultural heritage, which have caused an increase in the need to update the system of measures to safeguard cultural values and overcome the underestimation of the protection of cultural heritage as a national security factor.

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Laporte, Jean, Henri Dolou, Joseph Avis, and Oliver Arino. "Thirty years of satellite derived bathymetry – The charting tool that hydrographers can no longer ignore." International Hydrographic Review 29, no. 1 (2023): 170–84. http://dx.doi.org/10.58440/ihr-29-a20.

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Thirty years after being introduced into national chart series, Satellite Derived Bathymetry (SDB) charts are still struggling to be recognised as valid navigation documents, capable of meeting the level of confidence required by the S-44 IHO standards for hydrographic surveys. The advent of new generation satellite constellations, such as Sentinel-2*, provide improved geolocation and, thanks to higher revisit frequency, an almost unlimited capacity to detect natural dangers visible from space within the limits of the sensing instruments. Thus, this negative vision of SDB must change. Written

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Holzrichter, Michael, Bryan Johns, Delaine Thompson, and A. J. Boes. "Contouring of hydrographic data." Mathematical Modelling 7, no. 4 (1986): 547–60. http://dx.doi.org/10.1016/0270-0255(86)90033-3.

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Firsov, Yuriy Georgievich. "HYDROGRAPHIC INNOVATIVE EDUCATION METHODOLOGY." Vestnik Gosudarstvennogo universiteta morskogo i rechnogo flota imeni admirala S. O. Makarova 7, no. 1 (2015): 123–29. http://dx.doi.org/10.21821/2309-5180-2015-7-1-123-129.

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Forget, Gaël, and Carl Wunsch. "Estimated Global Hydrographic Variability." Journal of Physical Oceanography 37, no. 8 (2007): 1997–2008. http://dx.doi.org/10.1175/jpo3072.1.

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Abstract An estimate is made of the three-dimensional global oceanic temperature and salinity variability, omitting the seasonal cycle, both as a major descriptive element of the ocean circulation and for use in the error estimates of state estimation. Historical hydrography, recent data from the World Ocean Circulation Experiment, and Argo profile data are all used. Root-mean-square vertical displacements in the upper 300 m of the ocean are generally smaller than 50 m, except in energetic boundary currents and in the North Atlantic subpolar gyre. Variability in temperature and salinity is str

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Joyce, T. M. "The WOCE Hydrographic Program." Eos, Transactions American Geophysical Union 69, no. 5 (1988): 68. http://dx.doi.org/10.1029/88eo00050.

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Mills, Gerald B. "International hydrographic survey standards." International Hydrographic Review 29, no. 1 (2023): 154–57. http://dx.doi.org/10.58440/ihr-29-a17.

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Shammi, Mehra*. "HYDROGRAPHIC PRINTING: AN OVERVIEW." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 6, no. 6 (2017): 320–24. https://doi.org/10.5281/zenodo.809180.

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Graphics technologies have made significant evolution with the time and achieved new horizons in the field of technology. Hydrographic printing is an innovative printing process. Hydrographic printing is a technique of applying two dimensional printed designs to complex 3D surfaces using water. Prior to this innovation, printing on such complex surfaces are done by chemically or electroplating techniques. A customized pattern can be printed simply onto complex surfaces. It is applicable where direct printing is not possible. In this technique, water-soluble transfer PVA film that carries a spe

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ACAR, R., and K. SAPLIOGLU. "USING THE PSO ALGORITHM FOR BASEFLOW SEPARATION AND DETERMINATION OF TRENDS FOR THE YESILIRMAK RIVER (NORTH TURKEY)." Meteorologiya i Gidrologiya, no. 1 (January 2024): 58–71. http://dx.doi.org/10.52002/0130-2906-2024-1-58-71.

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Estimation of baseflow is a complex hydrographic task. Baseflow techniques and coefficients vary from basin to basin, stream to stream, and year to year. In this study, meta-heuristic optimization is used to automatically identify baseflow. The Particle Swarm Optimization (PSO), a meta-heuristic optimization approach, is chosen. The constraint and cost functions were determined using the PSO algorithm, Lyne and Hollick techniques, and a computer application. Over the period 1980-2015, the data were collected at the Kale station in the Yesilırmak River basin to validate the study model. The res

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Rojas Macías, Harold, Octavio Martinez Martinez, and Marjohnny Monterroza Pantoja. "Sedimentation analysis at the mouth of the Dique Channel to the Cartagena Bay through hydrographic surveys." International Hydrographic Review 30, no. 2 (2024): 128–35. https://doi.org/10.58440/ihr-30-2-n13.

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This article demonstrates the problem currently facing Cartagena Bay due to excessive sedimentation at the mouth of the Dique Channel, based on the analysis carried out by the Hydrographers of the National Hydrographic Service taking advantage of the management of the different seabed research technologies available to the Caribbean Oceanographic and Hydrographic Research Center (CIOH). Between December 2022 and January 2023, a hydrographic survey was carried out at the mouth of the Dique Channel, carrying out a multitemporal analysis with the hydrographic data from 2012 and 2020 stored in the

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Köster, Friedrich W., Christian Möllmann, Hans-Harald Hinrichsen, et al. "Baltic cod recruitment – the impact of climate variability on key processes." ICES Journal of Marine Science 62, no. 7 (2005): 1408–25. http://dx.doi.org/10.1016/j.icesjms.2005.05.004.

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Abstract Large-scale climatic conditions prevailing over the central Baltic Sea resulted in declining salinity and oxygen concentrations in spawning areas of the eastern Baltic cod stock. These changes in hydrography reduced the reproductive success and, combined with high fishing pressure, caused a decline of the stock to the lowest level on record in the early 1990s. The present study aims at disentangling the interactions between reproductive effort and hydrographic forcing leading to variable recruitment. Based on identified key processes, stock dynamics is explained using updated environm

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Silva, Márcio Santos, Cristiane Kreutz, Robertson Fonseca de Azevedo, and Maristela Denise Moresco Mezzomo. "Creation of an environmental protection area in a public supply source: possibilities and challenges in Cianorte - Paraná." Revista Engenharia na Agricultura - Reveng 29 (December 8, 2021): 389–404. http://dx.doi.org/10.13083/reveng.v29i1.12621.

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This work analyzed the contribution that the creation of Environmental Protection Areas (EPA) may bring to the conservation of hydrographic basins used as public water sources. The object of study of this work was the hydrographic basin of the Ligeiro River which, by 2022 onwards, will be the new source of public supply in the city of Cianorte-Paraná, replacing the hydrographic basin of the Bolívar stream. The latter has environmental impacts caused mainly by the expansion of urban areas and inadequate practice of land use, occupation, and management, which affects the population’s supply, par

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