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Journal articles on the topic 'Estuary management'

Author: Grafiati

Published: 20 February 2023

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1

Ding, Yan, Keh-Chia Yeh, and Shao-Tang Wei. "INTEGRATED COASTAL PROCESS MODELING AND IMPACT ASSESSMENT OF FLOATING AND SEDIMENTATION IN COASTS AND ESTUARIES." Coastal Engineering Proceedings, no. 35 (June 23, 2017): 18. http://dx.doi.org/10.9753/icce.v35.management.18.

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In this study, an integrated coastal process model was applied to assess impact of coastal flooding and sedimentation in an estuary in Taiwan and to evaluate performance of proposed engineering plans for flood prevention and sedimentation management. This in-situ validated model was used to simulate and predict hydrodynamic processes and morphological changes induced by multiple hydrological forcing such as river flood flows, waves, tides, and storms surges from rivers to the estuary and its adjacent coasts. Simulation results quantified coastal flooding risks, erosions, sedimentation, and channel refilling. Predicted dynamic responses to typhoons and monsoons were utilized for identifying the most effective engineering plan to reshape the geometry of the estuary. After the selected engineering plan was accomplished, this model was applied again to further predict morphological changes in the newly-developed estuary. This paper demonstrates effectiveness of a simulation-based coastal and estuary planning approach to manage flood and sedimentation driven by complex physical processes from river flows, waves, tides, and sediment transport.

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2

Zhang, Jinshan, Jun Kong, Zhiyi Lei, and Weisheng Zhang. "STUDY ON INTERACTION BETWEEN THE ESTUARY DYNAMIC AND STORM SURGE INDUCED BY TROPICAL CYCLONE WINNIE(1997) IN YANGTZE RIVER ESTUARY." Coastal Engineering Proceedings 1, no. 32 (January 26, 2011): 22. http://dx.doi.org/10.9753/icce.v32.management.22.

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ABSTRACT This paper studied the interaction between the Estuary dynamic and storm surge induced by super tropical cyclone Winnie(1997) in Yangtze River Estuary with nested numerical model, which is driven by meso-scale meteorological model established. And the results indicate that, storm surges have significant influences on the Yangtze River Estuary. The maximum water level increase caused by storm surge can be monitored between Jiangyin and Xuliujing, whose exact position fluctuates owing to effects of the upstream runoff and estuarine tide. Furthermore the general laws about the relationships among astronomical tide, storm surge, and flood are revealed in this paper, and flood water level under storm surge events is predicted also.

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3

Kaiser, Ralf, Heiko Knaack, Marco Miani, and Hanz Dieter Niemeyer. "EXAMINATION OF CLIMATE CHANGE ADAPTATION STRATEGIES." Coastal Engineering Proceedings 1, no. 32 (January 29, 2011): 2. http://dx.doi.org/10.9753/icce.v32.management.2.

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Climate change adaptation strategies for coastal protection are examined with the help of mathematical models in the Ems/Dollart Estuary in consideration of different climate scenarios. The Ems Dollart Estuary is located at the Dutch German border in the southern North Sea, a coastal area which has suffered from enormous land losses due to medieval storm surges. Since then the medieval retreat was partly reduced by successive land reclamation following the development of salt marshes.

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4

Müller-Navarra, Sylvin, and Ingrid Bork. "DEVELOPMENT OF AN OPERATIONAL ELBE TIDAL ESTUARY MODEL." Coastal Engineering Proceedings 1, no. 32 (January 26, 2011): 48. http://dx.doi.org/10.9753/icce.v32.management.48.

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Due to local tidal conditions, vessels coming in from the North Sea and bound for the port of Hamburg – more than 100 km upstream – require continually updated hydrological and oceanographic forecasts. The principal objective of the research project OPTEL (Operational Elbe Tidal Estuary Model) is to provide hydrological and oceanographic forecasts about water levels, depths, currents, salinity, temperature and ice conditions for any tidally influenced place on the river Elbe. By using a numerical model, it is ensured that water levels and currents are coupled dynamically, which allows peak water levels, slack water times, and – in 3D modelling – flow profile to be modelled in a physically consistent way and with high resemblance to natural conditions. The model concept including model output statistics (MOS) and first model results are presented.

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Li, Tilai, Xiangyu Gao, Xinzhou Zhang, and Yinshuang Wang. "IMPACT OF RUNOFF ON SALT INTRUSION OF YANGTZE ESTUARY." Coastal Engineering Proceedings 1, no. 32 (February 2, 2011): 49. http://dx.doi.org/10.9753/icce.v32.management.49.

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Based on one-dimensional and two-dimensional mathematical coupling models of tidal current and salinity from Datong to Yangtze estuary, the impacting scope of salt intrusion are calculated when the runoff of Datong from 4,500m3/s to 30,000m3/s, and the maximum and average value of salinity at each representative point of the estuary are given. When flow of Datong is less than 10,000 m3/s, if projects of water transfer, pumping and diversion are not taken into account at the lower reaches of Datong, the maximum salinity at the downstream reaches of Xuliujing and the average salinity at the downstream reaches of Baimaosha will exceed drinking water criteria.

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6

Naulin, Marie, Andreas Kortenhaus, and Hocine Oumeraci. "RELIABILITY ANALYSIS AND BREACH MODELLING OF SEA/ ESTUARY DIKES AND COASTAL DUNES IN AN INTEGRATED RISK ANALYSIS." Coastal Engineering Proceedings 1, no. 33 (December 14, 2012): 61. http://dx.doi.org/10.9753/icce.v33.management.61.

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In order to quantify the risk of flooding, an integrated risk analysis is being performed within the German ‘XtremRisK’ project (Extreme storm surges at open coasts and estuarine areas: risk assessment and mitigation under climate change aspects) wherein one task is to analyze the reliability and breaching of flood defences. In this paper, the methods and results of the reliability analysis and the breach modelling of sea and estuary dikes and coastal dunes are discussed and applied to examples of the pilot sites of Hamburg (Elbe Estuary) and the Island of Sylt (North Sea). These results are put in context of an integrated flood risk analysis approach used in XtremRisK.

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7

McLean, Errol J., and Jon B. Hinwood. "APPLICATION OF A SIMPLE HYDRODYNAMIC MODEL TO ESTUARY ENTRANCE." Coastal Engineering Proceedings 1, no. 32 (January 30, 2011): 42. http://dx.doi.org/10.9753/icce.v32.management.42.

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Tidal inlets which link a tidal basin to the sea via a constricted entrance are common on the south-east Australian coast. Closure, or even significant constriction, raises water levels but restricts tidal range within the basin, while open entrances provide regular and significant tidal exchange with the ocean. A rapid assessment procedure with minimal data requirements has been shown to be informative for monitoring and a useful component of any Decision Support System set up as part of a management structure. Such a system is presented in this paper. It is based on one permanent water level gauge inside the inlet plus the use of a simple, first-order hydrodynamic model to relate the tide range, mean water level and river flow to the inlet cross sectional area. The method is tested against data from the Snowy River Estuary in south-eastern Australia but would be suitable over a range of estuaries. In addition, the framework presented can also provide a mechanism to explore conditions over the range of expected data, thus allowing better selection of model schematization and runs in estuarine systems where the use of 2 or 3D modeling can be justified.

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8

Kidd, Sue. "Planning for Estuary Resources: The Mersey Estuary Management Plan." Journal of Environmental Planning and Management 38, no. 3 (September 1995): 435–42. http://dx.doi.org/10.1080/09640569512968.

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9

Herrling, Gerald, Heiko Knaack, Ralf Kaiser, and Hanz Dieter Niemeyer. "EVALUATION OF DESIGN WATER LEVELS AT THE EMS-DOLLARD ESTUARY CONSIDERING THE EFFECT OF A STORM SURGE BARRIER." Coastal Engineering Proceedings 1, no. 32 (January 31, 2011): 43. http://dx.doi.org/10.9753/icce.v32.management.43.

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In the Ems-Dollard estuary at the southern North Sea coast a revaluation of design water levels along the German dykes has become necessary, since the safety margin for sea level rise was increased by 25 cm due to a decision of the Lower Saxon Ministry for Environment and Climate Protection. The upstream part of the estuary is protected against high storm surges by a storm surge barrier. The closure of the barrier effects downstream surge water levels due to partial reflection. Deterministic-mathematical modeling is applied to evaluate design water levels and design wave run-up. Three severe storm surge events have been hindcasted by a cascade of three hierarchical models from the Continental Shelf over the German Bight into the area of interest. The models are forced by non-stationary and spatially varying data of atmospheric pressure, wind velocities and directions available of meteorological model investigations. The verification of the storm surge model with water level observations yields good agreements. With respect to legal boundary conditions, the single-value-method is applied to determine the highest expected high water level at Emden. Starting from this target water level, the wind velocities in the meteorological boundary conditions are increased with the aim to increase the surge level at the coast and to match the predetermined design water level at Emden. The responding water levels in the Ems-Dollard estuary assign the new design water levels.

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10

van Buuren, A., and L. Gerrits. "Understanding and managing a complex estuary: the process towards more congruence between the physical system characteristics and the management system of the Westerschelde (Netherlands)." Hydrology and Earth System Sciences Discussions 5, no. 3 (June 11, 2008): 1371–405. http://dx.doi.org/10.5194/hessd-5-1371-2008.

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Abstract. In this article, we expand on the relationship between the social processes of policymaking, management and research in the context of the Westerschelde estuary. This complex estuary system, located in Belgium and the Netherlands, has its own morphological and ecological characteristics and dynamics, and has three core functions: economically, it makes the port of Antwerp accessible; ecologically, it generates habitats for certain unique species; and in terms of safety, it prevents the hinterland from being flooded. We analyze how the social processes of policymaking, management and analysis have focused on these three aspects, and how they have affected the estuary. We proceed to develop a framework for evaluating the social system of policy-making, management and research. This framework focuses on the social system's adaptive capabilities (how it evolved in a non-linear fashion), integrative capacity (how the system's interconnectivity was taken into account), and participative competencies (how the different interests and insights regarding the estuary were absorbed). This framework was then applied to twenty years of policymaking about, management of, and research on the Westerschelde estuary. We conclude that, because of policy learning effects, policy/management and research take the estuary's self-organizing capacities into account much more than they did in the past. However, the self-referential behaviour of policymakers, managers and researchers makes it possible that an anthropocentric and technocratic approach towards managing the estuary, indicating a disconnection between the social and physical systems, could return.

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11

Knowles, Steve, and Louise Myatt-Bell. "The Severn Estuary Strategy: a consensus approach to estuary management." Ocean & Coastal Management 44, no. 1-2 (February 2001): 135–59. http://dx.doi.org/10.1016/s0964-5691(01)00044-8.

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12

Keneley, M., K. O'Toole, B. Coffey, and A. MacGarvey. "Stakeholder participation in estuary management: the development of Victoria's Estuary Entrance Management Support System." Australasian Journal of Environmental Management 20, no. 1 (March 2013): 49–62. http://dx.doi.org/10.1080/14486563.2012.756379.

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13

Reeve, Dominic, Jose M. Horrillo-Caraballo, Andrew Fox, Dave Simmonds, Sum Kwan, Shunqi Pan, and Deborah Greaves. "COASTAL DEFENCE EVALUATION: AN SPRC APPROACH." Coastal Engineering Proceedings 1, no. 33 (October 18, 2012): 37. http://dx.doi.org/10.9753/icce.v33.management.37.

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In this paper, we show how the methodology based on the Source-Pathway-Receptor-Consequence (SPRC) approach can be used to identify the risks of flooding and erosion. The methodology is applied to the Teign Estuary in Devon, UK to define the linkages between physical loads (waves, tides), sea defences, areas liable to flooding and the impacts of flooding.

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14

Horie, Takehito, Keita Furukawa, and Tomonari Okada. "SPATIAL DISTRIBUTION OF HYPOXIC WATER MASS BASED ON A MONITORING CAMPAIGN OF BAY ENVIRONMENT AT TOKYO BAY, JAPAN." Coastal Engineering Proceedings 1, no. 32 (January 26, 2011): 51. http://dx.doi.org/10.9753/icce.v32.management.51.

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In 2008, a monitoring campaign of bay environment had been done at Tokyo Bay, Japan. This campaign has been a part of implementation of the bay renaissance plan enacted since 2005. The data was collected by 46 institutions in 568 monitoring points in around 2nd July 2008. Dissolved oxygen, salinity and temperature were monitored in sea area basically from the surface to the bottom with 1.0 m vertical spacing at the monitoring points. We analyzed spatial distribution of hypoxic water mass based on this monitoring campaign data. Following results are obtained that 1) Measurement results showed that the bottom hypoxic water mass dominated in the head of Tokyo bay, while dissolved oxygen concentration was high condition in tidal flat and in shallow water, such as the Tama River estuary, Sanbanze tidal flat area and the Ara River estuary. 2) We proposed new parameters, such as CDZ and VDZ, which showed characteristic of spatial distribution of hypoxic water. The proposed parameters could be related to the temporal and spatial development of hypoxic water. Thus, these parameters will extend the interpretation of conservative bottom dissolved oxygen (DOB) data to understand the dynamics of hypoxic water.

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15

Canning, Paul John. "DETERMINING A SUSTAINABLE APPROACH FOR MANAGING AN ESTUARY MOUTH – A CASE STUDY." Coastal Engineering Proceedings 1, no. 34 (October 26, 2014): 7. http://dx.doi.org/10.9753/icce.v34.management.7.

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16

Jemmett, Alan. "Implementing Estuary Management Plans : A Case Study from the Dee Estuary." Geographical Journal 164, no. 3 (November 1998): 307. http://dx.doi.org/10.2307/3060619.

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17

Zhang, Xinzhou, Xiping Dou, and Jinshan Zhang. "STUDY ON INFLUENCE OF BAIMAO SANDBANK CONTROL PROJECT IN SOUTHERN BRANCH OF THE YANGTZE RIVER ESTUARY, CHINA." Coastal Engineering Proceedings 1, no. 33 (October 18, 2012): 39. http://dx.doi.org/10.9753/icce.v33.management.39.

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The author establishes the Yangtze estuary 2D tidal and sediment mathematical model based on the orthogonal curvilinear coordinate system. The erosion and siltation of engineering section under the hydrological conditions of flood season, dry season and the great flood after the Baimao Sand control engineering is calculated. Preliminarily expounds the correlation of Baimao Sand and Biandan Sand and the impact of Biandan Sand after the Baimao Sand control engineering is implemented.

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18

Gao, Min, and Dano Roelvink. "PILOT STUDY ON NAVIGATION CHANNEL REGULATION WORKS IN THE NORTH CHANNEL, YANGTZE ESTUARY." Coastal Engineering Proceedings 1, no. 32 (January 25, 2011): 39. http://dx.doi.org/10.9753/icce.v32.management.39.

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It is estimated that the waterway in North Passage would not be able to meet the demand of shipping development soon and it is necessary to open a new deep navigation channel with a depth of 10 m in North Channel in the near future. A pilot study on the regulation of North Channel was proposed by Yangtze Estuary Waterway Administration Bureau and Prof. Dano Roelvink from UNESCO-IHE. The idea of regulating the navigation channel in North Channel was raised based on an analysis of morphological processes in this area. Multiple regulation plans were proposed, amongst which a configuration to regulate the North Channel was suggested after a study on a numerical modelling of tidal flow and morphological processes. Some suggestions were put forward for future studies.

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19

BERGSTROM, JOHN C., JEFFREY H. DORFMAN, and JOHN B. LOOMIS. "Estuary Management and Recreational Fishing Benefits." Coastal Management 32, no. 4 (October 2004): 417–32. http://dx.doi.org/10.1080/08920750490487430.

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20

Donner, Monika, Florian Ladage, Oliver Stoschek, and Hoang Ha Nguyen. "METHODS AND ANALYSIS TOOLS FOR REDEVELOPMENTS IN AN ESTUARY WITH HIGH SUSPENDED SEDIMENT CONCENTRATIONS." Coastal Engineering Proceedings 1, no. 33 (October 25, 2012): 55. http://dx.doi.org/10.9753/icce.v33.management.55.

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One of the largest estuaries in Germany, the Ems estuary, identified a dramatic turbidity increase up to more than 10 g/l over the last years. Due to this fact ecologists and water management authorities try to find restoration measures, which are able to reduce suspended sediment concentrations and to increase oxygen supply. The assessment of these potential restoration measures is described in the following paper and is based on a highly resolved numerical representation of the present situation of the Ems with extreme high turbidities by including effects of flocculation and hindered settling. Therefore two different approaches for the settling velocity due to flocculation were compared. An analysis of these restoration measures delivers important findings and shortcomings of each measure. Finally the restoration potentials are quantified by key indicators for hydrodynamics and suspended sediment transport behavior and were evaluated due to their relevance in reduction of high turbidities.

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21

Zorndt, Anna, Nils Goseberg, and Torsten Schlurmann. "INFLUENCE OF RETENTION AREAS ON THE PROPAGATION OF STORM SURGES IN THE WESER ESTUARY." Coastal Engineering Proceedings 1, no. 34 (December 2, 2014): 51. http://dx.doi.org/10.9753/icce.v34.management.51.

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22

Canning, Paul, and Richard Cox. "NATURAL DESIGN AND MANAGEMENT OF AN ESTUARY MOUTH SYSTEM." Coastal Engineering Proceedings, no. 36 (December 30, 2018): 93. http://dx.doi.org/10.9753/icce.v36.risk.93.

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Estuaries often are the focus of both man-made infrastructure and valuable flora and fauna. Sand spits are common at the mouth of estuaries, and are one of the key features that influence hydrodynamics and geomorphology in estuaries. The Environment Agency has delivered a long term coastal management scheme, which has recently been designed and built, to manage the Dawlish Warren sand spit at the mouth of the Exe Estuary, in south Devon, UK. This scheme is designed to â€¢ Protect 3,000 properties and critical national infrastructure from flooding. â€¢ Restore 2km of internationally designated (SAC) dune and associated ecology continue protection to the SPA bird assemblages in the Exe Estuary. â€¢ Provide a flexible way forward through this century for the sand spit to be managed in a sustainable and balanced manner. The Exe Estuary is macrotidal with a range of 4m, and main tributary inflows of the order of 20-400m3/s. Dawlish Warren sand spit covers three quarters of the estuary mouth width, sheltering the estuary from the coastal wave and tide climate. Consequently, the inestuary extreme wave heights are limited to less than 1.1m, with storm surges of up to 1-2m. The estuary exhibits high tidal velocities through its mouth, with flood/ebb tidal deltas and offshore banks present. The sand spit has breached around 13 times over the last two centuries, prompting reactive construction of concrete, rock armour and

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23

Ge, Jianzhong, Pingxing Ding, and Changsheng Chen. "IMPACTS OF DEEP WATERWAY PROJECT ON LOCAL CIRCULATIONS AND SALINITY IN THE CHANGJIANG ESTUARY, CHINA." Coastal Engineering Proceedings 1, no. 32 (January 17, 2011): 44. http://dx.doi.org/10.9753/icce.v32.management.44.

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With an aim to improve and maintenance water depth along the navigational channel, the Deep Waterway Project has been conducted in the Changjiang Estuary. The structures of dikes and groins have greatly changed the local circulation with the combined effects of astronomical tide and strong freshwater discharge. A high-resolution fully three-dimension unstructured-grid model (FVCOM) has been applied to study the complicated hydrodynamics with the implementation of unstructured-grid dike-groin module. With the model validation with observation data, the simulation shows the dikes and groins has converted the rotational current into reciprocating flow along the navigational channel between the dikes, and produced the geometrically controlled eddies. The significant southward crossover current was produced along the dike during high tide when the water level is higher than the dike height. The strong saltwater intrusion is also revealed in the observation and model simulation.

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24

Bally, Roderick. "Conservation Problems and Management Options in Estuaries: The Bot River Estuary, South Africa, as a Case-history for Management of Closed Estuaries." Environmental Conservation 14, no. 1 (1987): 45–51. http://dx.doi.org/10.1017/s0376892900011097.

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Closed (or ‘blind’) estuaries are common features, practically throughout the world, of areas experiencing markedly seasonal rainfall. The Bot River vlei is a closed estuary which faces considerable problems of management and conservation. For the past 100 years or more, the estuary has been opened to the sea every 2 to 5 years by artificial means. This has resulted in a very great variability of physical conditions and a concomitantly low diversity of organisms that are able to occupy the estuary permanently. Nevertheless, those species that do exist in the Bot River vlei are mostly estuarine species.

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Fidélis, Teresa, and Teresa Carvalho. "Estuary planning and management: the case of Vouga Estuary (Ria de Aveiro), Portugal." Journal of Environmental Planning and Management 58, no. 7 (June 4, 2014): 1173–95. http://dx.doi.org/10.1080/09640568.2014.918874.

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26

Fan, Qijin. "CAUSES OF BACK-SILTATION IN THE NORTH PASSAGE OF YANGTZE ESTUARY AND EVALUATION OF THE ENGINEERING MEASURES." Coastal Engineering Proceedings 1, no. 32 (January 25, 2011): 47. http://dx.doi.org/10.9753/icce.v32.management.47.

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This study focused on the fact that the amount of back-siltation in the deep waterway of North Passage has been increased and converged in the middle reach since 2005. This paper systematically analyzed impacts resulting from the change of various factors such as sediment and hydrodynamics conditions, pointed out the major reason resulting in the increase on the amount of back-siltation in the middle reach, and discussed engineering measurements to reduce the siltation. The engineering effects of the measures were evaluated after the constructions as well.

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Walther, Régis, Cyrielle Cayrol, Luc Hamm, A. Delouis, and D. Lehay. "EVALUATION OF AN OFFSHORE DISPOSAL SITE IN THE LOIRE ESTUARY THROUGH FIELD MONITORING AND 3D NUMERICAL MODELING." Coastal Engineering Proceedings 1, no. 34 (October 30, 2014): 24. http://dx.doi.org/10.9753/icce.v34.management.24.

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28

Hoguane, Antonio Mubango, Rodrigues Pita Francisco, Rosa Lourenço Simbine, and Humberto Silvestre Mabota. "Community Perception of the Value of the Ecosystems of the Bons Sinais Estuary, Mozambique, Southern Africa." Revista de Gestão Costeira Integrada 21, no. 4 (December 2021): 249–63. http://dx.doi.org/10.5894/rgci-n435.

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Understanding the community’s perceptions of, and beliefs about, the value of ecosystems and natural resources is important for designing effective environmental education and awareness campaigns and for the adoption of sustainable natural resources management. The present paper examines the perceptions of the natural resource users in the Bons Sinais Estuary and gauges their willingness to contribute to mangrove ecosystem restoration and management. 169 natural resource users, including fishermen, farmers, and forest produce users, from five villages along the Estuary (Marrubune, Gazelas, Icidua, Chuabo Dembe and Inhangome), were interviewed. The interviewees assigned high value to the estuary as a source of fish, as agricultural land and as productive forest. They considered the estuary important for provision of clean water and air and for its potential for tourism development. There were strong similarities, across the region, with regard to the value of the estuary ecosystem (0.6 Keywords: Ecosystem services, natural resource management, livelihood activities, mangrove restoration, co-management.

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Douglass, Scott L., Carl Ferraro, Caren Reid Dixon, Larry Oliver, and Lloyd Pitts. "A GULF OF MEXICO MARSH RESTORATION AND PROTECTION PROJECT." Coastal Engineering Proceedings 1, no. 33 (December 15, 2012): 76. http://dx.doi.org/10.9753/icce.v33.management.76.

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A $3 million (US $) marsh restoration and protection project was constructed in 2010 along 1.6 km on the northern shore of Mississippi Sound near Bayou LaBatre, Alabama to restore about 10 ha of marsh and protect another 300 ha of an extremely productive natural salt marsh estuary – Little Bay. The project restored an historic marsh peninsula with 100,000 m3 of sand pumped from a nearby dredged material disposal area; extensive vegetation plantings including over 100,000 plants; and an offshore segmented, porous breakwater consisting primarily of individual concrete units called “wave attenuation devices” or WADs. The wave transmission characteristics of these “wave attenuation devices” were measured in original laboratory wave tests for this design. The wave transmission coefficient was found to vary, 0.4

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Spearman, Jeremy, John Baugh, Nigel Feates, Mike Dearnaley, and Dan Eccles. "Small estuary, big port – progress in the management of the Stour-Orwell Estuary system." Estuarine, Coastal and Shelf Science 150 (October 2014): 299–311. http://dx.doi.org/10.1016/j.ecss.2014.07.003.

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31

Das, K. C. "The Upper James Estuary – A Study in Water Quality Management." Water Science and Technology 19, no. 9 (September 1, 1987): 1–7. http://dx.doi.org/10.2166/wst.1987.0061.

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The James River has its head waters in the Allegheny Mountains and flows generally southeasterly to Hampton Roads, Chesapeake Bay and thence to the Atlantic Ocean. Below Richmond, Virginia, the river is tidal with the channel meandering through the coastal plains. Below Hopewell it widens to a broad estuary, with a deep navigable channel bordered by tide marshes. The upper estuary, between Richmond and Hopewell, is heavily used for water supply, recreation, and industrial development. The water entering the estuary a few miles upstream of Richmond is of good quality. However, as one reaches Richmond, the quality of the water deteriorates. There are eleven major discharging municipalities and industries within a stretch of twenty two river miles between Richmond and Hopewell. The major factors contributing to water quality problems below the City of Richmond stem from the intermittent discharge from combined sewer overflows (CSOs) coupled with the continuous discharge from the City's sewage treatment plant. The CSOs contribute a large quantity of soluble BOD, suspended solids, settleable solids, and fecal coliforms to the estuary. The City's sewage treatment plant continuously discharges large quantities of ammonia-nitrogen and phosphorus, in addition to BOD and suspended solids. Rational Management and use of the waters of the upper James estuary appear to be critical. The objectives of this paper, therefore, are the discussion of the present water quality and the wastewater discharge reductions required in order to meet certain water quality and water use objectives.

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Shen, Haiwei, Xiongping Zhang, Hong Shen, Yizhong Chen, Yiping Shao, Nicole Mulanaphy, Shiqiang Lu, and Weiqing Lin. "Application of Online Spill Simulation and Response Management System in the Yangtze River Estuary." International Oil Spill Conference Proceedings 2014, no. 1 (May 1, 2014): 300316. http://dx.doi.org/10.7901/2169-3358-2014-1-300316.1.

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Yangtze River estuary is one of the busiest shipping corridors in the world connecting China to the world and coast to inner China. In the middle of the Yangtze River estuary, there is a Qing Cao Sha reservoir providing drinking water to more than 10 million people in Shanghai. Frequent spills near the estuary possess a great threat to drinking water safety to the megacity. Scientists in RPS ASA and SAES have built an online spill simulation and response management system for the Yangtze River Estuary. The online system integrates oil/chemical spill models, operational hydrodynamic model, online met-ocean data, response and resource database with an interactive mapping system. It has been successfully used to simulate the spill trajectory and fate of the spill to coordinate with spill response team. Here we introduce this online system and present an oil spill response case in the Yangtze Estuary in June 2012 where the model simulation results matched extremely well with the field data observed by the local response team.

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33

Townend, Ian, Kate Rossington, Michiel Knaapen, and Stephen Richardson. "THE DYNAMICS OF INTERTISDAL MUDFLATS AND SALTMARSHES WITHIN ESTUARIES." Coastal Engineering Proceedings 1, no. 32 (January 26, 2011): 45. http://dx.doi.org/10.9753/icce.v32.management.45.

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Whilst there has been extensive work on the study of the morphological response of estuaries, due to the transport of sediment under the forcing of waves and tides, and independent studies on the dynamics of saltmarsh, only recently have attempts been made to look at the interaction of the two. This paper furthers this endeavor by adding a simple saltmarsh model into the aggregated scale model of long-term morphology known as ASMITA. The results show the strong interaction between sediment availability within the estuary and marsh depth and, hence, the species that can be sustained. Under low rates of sediment loading the biology is the controlling influence, whereas under higher rates, typical of many UK estuaries, the sediment loading tends to be dominant. The importance of both the rate of sea level rise and the nodal tidal cycle are also explored.

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이창희, 심영규, Paikho Rho, Daeseok Kang, and 남정호. "Management System Improvement Strategies for Supporting an Integrated Estuary Environmental Management." Ocean Policy Research 22, no. 2 (December 2007): 89–122. http://dx.doi.org/10.35372/kmiopr.2007.22.2.004.

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Zhao, Bing, and Larry W. Mays. "Estuary Management by Stochastic Linear Quadratic Optimal Control." Journal of Water Resources Planning and Management 121, no. 5 (September 1995): 382–91. http://dx.doi.org/10.1061/(asce)0733-9496(1995)121:5(382).

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Ebberts, Blaine D., Ben D. Zelinsky, Jason P. Karnezis, Cynthia A. Studebaker, Siena Lopez-Johnston, Anne M. Creason, Lynne Krasnow, Gary E. Johnson, and Ronald M. Thom. "Estuary ecosystem restoration: implementing and institutionalizing adaptive management." Restoration Ecology 26, no. 2 (August 25, 2017): 360–69. http://dx.doi.org/10.1111/rec.12562.

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Gonzalez-Santamaria, Raul, Dave Simmonds, Barbara Zanuttigh, Dominic E. Reeve, Robert J. Nicholls, Richard C. Thompson, Shunqi Pan, et al. "APPLICATION OF A NOVEL DECISION SUPPORT SYSTEM TO ASSESS AND MANAGE COASTAL FLOOD RISK IN THE TEIGN ESTUARY, UK." Coastal Engineering Proceedings 1, no. 34 (October 30, 2014): 43. http://dx.doi.org/10.9753/icce.v34.management.43.

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Birch, Gavin F., and L. Rochford. "Stormwater metal loading to a well-mixed/stratified estuary (Sydney Estuary, Australia) and management implications." Environmental Monitoring and Assessment 169, no. 1-4 (October 27, 2009): 531–51. http://dx.doi.org/10.1007/s10661-009-1195-z.

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Knudsen, Soeren Bjerre, Signe M. Ingvardsen, Holger Toxvig Madsen, Carlo Sorensen, and Bo Brahtz Christensen. "INCREASED WATER LEVELS DUE TO MORPHODYNAMIC CHANGES; THE LIMFJORD, DENMARK." Coastal Engineering Proceedings 1, no. 33 (October 25, 2012): 49. http://dx.doi.org/10.9753/icce.v33.management.49.

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The Limfjord is an estuary in Denmark between The North Sea and Kattegat. The Thyboroen Channel connects the fjord with The North Sea. The water levels in the western part of the Limfjord are strongly correlated with the water level in the sea at Thyboroen. Analyses revealed a close to threefold increase in the channel cross section over the last 100 years. This has led to a detailed investigation into the effects of the channel cross section on the extreme high water levels in the Limfjord now and in the future. For Lemvig in the western part of the Limfjord the water level with a return period of 100 years would have been 1.73 m with the 1958 channel bathymetry throughout the whole period and 1.99 m with the 2005 channel bathymetry. With the extrapolated 2060-bathymetry the 100 years water level will be 2.38 m. A number of measures to counteract the consequences of this development have been evaluated.

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Scott, James Calvert. "The Rising Tide of Estuary English: The Changing Nature Of Oral British Business Communication." Business Communication Quarterly 58, no. 2 (June 1995): 40–46. http://dx.doi.org/10.1177/108056999505800208.

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Estuary English is a combination of nonregional and local southeastern English pronunciation and intonation that lies between R. P. English and London street speech and is sweeping across the United Kingdom, including its business community. This article identifies characteristics of Estuary English, documents the usage of Estuary English within the British business community, describes the milieu that causes Estuary English to be acceptable in the British business community, speculates about the future of Estuary English in the British business community, identifies the implications of Estuary English for business communicators, and discusses the implications of Estuary English for business communication teachers and consultants.

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Zhang, Xingjian, Junmin Mou, Jianfeng Zhu, Pengfei Chen, and Rongfang (Rachel) Liu. "Capacity Analysis for Bifurcated Estuaries Based on Ship Domain Theory and its Applications." Transportation Research Record: Journal of the Transportation Research Board 2611, no. 1 (January 2017): 56–64. http://dx.doi.org/10.3141/2611-07.

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The bifurcated estuary is an important segment of marine transportation systems that are themselves becoming increasingly important. Because of branching channels, the cyclical change of water levels, and sophisticated operating rules in many large bifurcated estuaries, it is often difficult to estimate the traffic capacity and simulate ships’ motions, even though it is critically important for traffic management and efficiency. In recent years, the increasing number of ships that collect and contribute to the Automatic Identification System (AIS) have made it possible to monitor traffic flow along waterways, including bifurcated estuaries. This study developed a typical capacity estimation model based on ship domain theory. By using AIS data collected in the Yangtze River estuary, a typical bifurcated estuary system, the study analyzed various physical characteristics, weather conditions, and vessel characteristics to derive related impacts of each on overall capacity of the bifurcated estuary. Validated with practical observations, the method can be applied to similar estuary channel systems to improve waterway operations and management.

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Beck, JS, and GR Basson. "Klein River Estuary (South Africa): 2D numerical modelling of estuary breaching." Water SA 34, no. 1 (December 11, 2018): 33. http://dx.doi.org/10.4314/wsa.v34i1.180759.

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Bennett, William George, and Harshinie Karunarathna. "Coastal flood alleviation through management interventions under changing climate conditions." International Journal of Disaster Resilience in the Built Environment 11, no. 2 (November 16, 2019): 187–203. http://dx.doi.org/10.1108/ijdrbe-07-2019-0042.

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Purpose Coastal flooding has disastrous consequences on people, infrastructure, properties and the environment. Increasing flood risk as a result of global climate change is a significant concern both within the UK and globally. To counter any potential increase in future flooding, a range of potential management options are being considered. This study aims to explore future coastal management practice for flood alleviation, incorporating the influence of climate change. Design/methodology/approach The Taf estuary in South West Wales, a macro-tidal estuary which has a history of coastal flooding, was chosen as the case study in this paper to investigate the impact of coastal management interventions such as construction of hard defences, managed realignment or altering land use of affiliated ecosystems such as salt marshes on the complex hydrodynamics and hence flooding of the surrounding areas of the estuary. The study was carried out using a numerical hydrodynamic model of the Taf estuary, developed using the process-based Delft3D modelling software. Findings The role of the selected management interventions on coastal flooding was investigated using an extreme storm condition, both with and without the impact of future sea level rise. The results highlight the scale of the effect of sea level rise, with the selected management interventions revealing that minimising the increase in flooding in future requires careful consideration of the available options. Originality/value This paper explores the highlighted role of coastal management practice in future with the influence of climate change to study how effective alternative methods can be for flood alleviation.

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Tuohy, William S. "Characterizing the san Francisco estuary: A case study of science management in the national estuary program." Coastal Management 21, no. 2 (January 1993): 113–29. http://dx.doi.org/10.1080/08920759309362196.

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Hoare, A. G. "Natural harmony but divided loyalties: the evolution of estuary management as exemplified by the Severn Estuary." Applied Geography 22, no. 1 (January 2002): 1–25. http://dx.doi.org/10.1016/s0143-6228(01)00018-2.

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Câmara, A. S., M. Cardoso da Silva, L. Ramos, and J. Gomes Ferreira. "Tejo 1– An Interactive Program for the Division of Estuaries into Homogeneous Areas." Water Science and Technology 19, no. 9 (September 1, 1987): 43–51. http://dx.doi.org/10.2166/wst.1987.0065.

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The division of an estuary into homogeneous areas from both hydrodynamic and ecological standpoints is essential to any estuarine basin management model. This paper presents an approach based on a heuristic algorithm to achieve such a division. The methodology implemented through an interactive computer program named Tejo 1 applies morphological, water quality and management criteria in order to achieve the disaggregation. The approach is equally applicable to river or lake basins, with only minor adaptations. An application of Tejo 1 to the Tejo estuary is included for illustrative purposes, which resulted in the final division of the estuary into 11 homogeneous areas.

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Widarmanto, Nanang, Haeruddin Haeruddin, and Pujiono Wahyu Purnomo. "KEBIASAAN MAKANAN, LUAS RELUNG DAN TINGKAT TROFIK KOMUNITAS IKAN DI ESTUARI KALIWLINGI KABUPATEN BREBES." BAWAL Widya Riset Perikanan Tangkap 11, no. 2 (August 20, 2019): 69. http://dx.doi.org/10.15578/bawal.11.2.2019.69-78.

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Studi mengenai kebiasaan makanan serta tingkat trofik ikan merupakan hal penting untuk mengetahui interaksi serta aliran energi antar spesies dalam ekosistem. Informasi ini membantu dalam pengelolaan ekosistem yaitu sebagai acuan dalam mengkaji perubahan yang terjadi serta bermanfaat untuk membangun model trofik dalam pengelolaan. Estuari merupakan eskosistem dinamis yang memiliki berbagai tipe jenis ikan serta rentan mengalami perubahan akibat aktivitas manusia. Pengelolaan ekosistem estuari penting untuk menjamin keberlanjutan sumberdaya ikan. Penelitian ini dilakukan di perairan estuari Kaliwlingi Brebes pada November-Desember 2018 dengan tujuan untuk mengetahui kebiasaan makanan, luas relung dan tingkat trofik komunitas ikan pada estuari Kaliwlingi. Hasil penelitian menunjukkan bahwa jenis makanan yang dimanfaatkan komunitas ikan di kawasan tersebut adalah fitoplankton, zooplankton, tumbuhan (makrofita), molusca, insekta (serangga), annelida, ikan, udang dan detritus. Beberapa ikan memiliki luas relung yang tinggi yang mengindikasikan cenderung bersifat generalis dalam memanfaatkan sumberdaya makanan. Sebagian besar ikan pada penelitian ini termasuk dalam tingkat trofik omnivora.The study of food habit and tropic levels of fish is important for understanding interaction and energy flows among species. This information helps in management of ecosystems as reference in assessing changes that occur in ecosystems and useful for constructing trophic model. Estuary ia a dynamic ecosystem that has various types of fish and susceptible due to human activitiesEstuaries is a habitat for various fish. However, estuaries is one of the vulnerable coastal ecosystems due to human activities impact.Management for estuaries ecosystem is important to maintain fish resources sustainability. This research was conducted in Kaliwlingi estuary-Brebes district in November – Desember 2018. The aim if this research is to obtain information of food habits, niche breadth and trophic level of fish community in Kaliwlingi estuary. The results showed that the food utilized by the fishes were phytoplankton, zooplankton, plants (macrophytes), mollusc, insects, annelids, nekton (fish), shrimp and detritus. Some fishes have a broad niche breadth which indicates as generalist in utilizing food resources. The trophic level of most of the fishes found in this study is omnivorous.

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Deitch, Matthew J., Haley N. Gancel, Amanda C. Croteau, Jane M. Caffrey, Whitney Scheffel, Brian Underwood, James W. Muller, et al. "Adaptive management as a foundational framework for developing collaborative estuary management programs." Journal of Environmental Management 295 (October 2021): 113107. http://dx.doi.org/10.1016/j.jenvman.2021.113107.

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Carvalho, Teresa M., and Teresa Fidélis. "The relevance of governance models for estuary management plans." Land Use Policy 34 (September 2013): 134–45. http://dx.doi.org/10.1016/j.landusepol.2013.02.007.

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Koss, Rebecca, Geoff Wescott, James Fitzsimons, and Lynne Hale. "‘Bright spots’ for estuary management in temperate Southern Australia." Australian Journal of Maritime & Ocean Affairs 7, no. 1 (January 2, 2015): 94–107. http://dx.doi.org/10.1080/18366503.2015.1014014.

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