scholarly journals REAL TIME COASTAL MONITORING FOR EFFECTIVE MANAGEMENT OF DUBAI COAST

2018 ◽  
pp. 38
Author(s):  
Ibrahim Mohammad Juma ◽  
Alya Abdulrahim AlHarmoudi ◽  
Noora Mohammed Hokal ◽  
Abdulla Sharief Kizhisseri
Keyword(s):  
Real Time ◽  
Coastal Zone ◽  
Sandy Beaches ◽  
Natural State ◽  
Coastal Processes ◽  
Effective Management ◽  
Coastal Monitoring ◽  
Significant Development ◽  
The North ◽  
Land Mass

The Dubai coastal zone is defined as a land mass stretching from the Abu Dhabi border in the south to Al Mamzar lagoon in the north, from approximately +4 m DMD (Dubai Municipality Datum) onshore to 10 nautical miles offshore. In its natural state this approximately 70km long coastline consists primarily of long sandy beaches backed by low level dunes and ridges. However, recent infra-structural developments related to trade, tourism and real estate have resulted in significant development within the Dubai coastal zone. These developments have interfered with the natural coastal processes of waves, tidal currents and sediment transport. To understand the dynamics of coastal processes Coastal Zone & Waterways Management Section (CWMS) of Dubai Municipality (DM) developed an advanced coastal real-time monitoring system for coastal management and future planning. This paper provides an overview of the coastal monitoring programme and how these data are used in managing the coastal zone and decision making.

scholarly journals Investigation of model capability in capturing vertical hydrodynamic coastal processes: a case study in the north Adriatic Sea

Ocean Science ◽  
2016 ◽  
Vol 12 (1) ◽  
pp. 51-69 ◽  
Author(s):  
W. J. McKiver ◽  
G. Sannino ◽  
F. Braga ◽  
D. Bellafiore
Keyword(s):  
Coastal Zone ◽  
General Circulation ◽  
Adriatic Sea ◽  
Numerical Study ◽  
Coastal Processes ◽  
Dense Water ◽  
The North ◽  
Surface Patterns ◽  
The Impact ◽  
North Adriatic Sea

Abstract. In this work we consider a numerical study of hydrodynamics in the coastal zone using two different models, SHYFEM (shallow water hydrodynamic finite element model) and MITgcm (Massachusetts Institute of Technology general circulation model), to assess their capability to capture the main processes. We focus on the north Adriatic Sea during a strong dense water event that occurred at the beginning of 2012. This serves as an interesting test case to examine both the models strengths and weaknesses, while giving an opportunity to understand how these events affect coastal processes, like upwelling and downwelling, and how they interact with estuarine dynamics. Using the models we examine the impact of setup, surface and lateral boundary treatment, resolution and mixing schemes, as well as assessing the importance of nonhydrostatic dynamics in coastal processes. Both models are able to capture the dense water event, though each displays biases in different regions. The models show large differences in the reproduction of surface patterns, identifying the choice of suitable bulk formulas as a central point for the correct simulation of the thermohaline structure of the coastal zone. Moreover, the different approaches in treating lateral freshwater sources affect the vertical coastal stratification. The results indicate the importance of having high horizontal resolution in the coastal zone, specifically in close proximity to river inputs, in order to reproduce the effect of the complex coastal morphology on the hydrodynamics. A lower resolution offshore is acceptable for the reproduction of the dense water event, even if specific vortical structures are missed. Finally, it is found that nonhydrostatic processes are of little importance for the reproduction of dense water formation in the shelf of the north Adriatic Sea.

scholarly journals Investigation of model capability in capturing vertical hydrodynamic coastal processes: a case study in the North Adriatic Sea

2015 ◽  
Vol 12 (4) ◽  
pp. 1625-1668 ◽  
Author(s):  
W. J. McKiver ◽  
G. Sannino ◽  
F. Braga ◽  
D. Bellafiore
Keyword(s):  
Coastal Zone ◽  
Adriatic Sea ◽  
Numerical Study ◽  
Horizontal Resolution ◽  
Coastal Processes ◽  
Dense Water ◽  
The North ◽  
Surface Patterns ◽  
The Impact ◽  
North Adriatic Sea

Abstract. In this work we consider a numerical study of hydrodynamics in the coastal zone using two different models, SHYFEM and MITgcm, to assess their capability to capture the main processes. We focus on the North Adriatic Sea during a strong dense water event that occurred at the beginning of 2012. This serves as an interesting test case to examine both the models strengths and weaknesses, while giving an opportunity to understand how these events affect coastal processes, like upwelling and downwelling, and how they interact with estuarine dynamics. Using the models we examine the impact of setup, surface and lateral boundary treatment, resolution and mixing schemes, as well as assessing the importance of nonhydrostatic dynamics in coastal processes. Both models are able to capture the dense water event, though each displays biases in different regions. The models show large differences in the reproduction of surface patterns, identifying the choice of suitable bulk formulas as a central point for the correct simulation of the thermohaline structure of the coastal zone. Moreover, the different approaches in treating lateral freshwater sources affect the vertical coastal stratification. The results indicate the importance of having high horizontal resolution in the coastal zone, specifically in close proximity to river inputs, in order to reproduce the effect of the complex coastal morphology on the hydrodynamics. A lower resolution offshore is acceptable for the reproduction of the dense water event, even if specific vortical structures are missed. Finally, it is found that nonhydrostatic processes are of little importance for the reproduction of dense water formation in the shelf of the North Adriatic Sea.

scholarly journals Effects of a 5-year trawling ban on the local benthic community in a wind farm in the Dutch coastal zone

2014 ◽  
Vol 72 (3) ◽  
pp. 962-972 ◽  
Author(s):  
Magda J. N. Bergman ◽  
Selma M. Ubels ◽  
Gerard C. A. Duineveld ◽  
Erik W. G. Meesters
Keyword(s):  
Coastal Zone ◽  
Benthic Community ◽  
Large Scale ◽  
Wind Farm ◽  
Diversity Index ◽  
Benthic Assemblages ◽  
The North ◽  
Wiener Diversity Index ◽  
Short Period ◽  
Reference Areas

Abstract As part of a large impact study in a wind farm (OWEZ) in the Dutch coastal zone, the effects of exclusion of bottom trawling on the benthic community were studied by comparison with nearby reference areas which were regularly fished. In addition to a standard boxcorer for common macrofauna, a Triple-D dredge was used to collect longer-lived, more sparsely distributed infauna and epifauna. Multivariate analysis did not reveal any difference between the assemblages in and outside OWEZ with respect to abundance, biomass, and production after a 5-year closure. The Shannon–Wiener diversity index pointed to a significantly higher diversity in OWEZ compared with some of the reference areas. A minority of the bivalve species assumed to be sensitive to trawling showed higher abundances (Spisula solida) or larger sizes (Tellina fabula, Ensis directus) in OWEZ than in some of the reference areas. In general, samples collected with the Triple-D showed more differences between areas than boxcore samples. No evidence was also found that the species composition in OWEZ relative to the reference areas had changed in the period between 1 (2007) and 5 (2011) years after closure. The change observed in all areas between 2007 and 2011 was mainly due to relatively small variations in species abundances. In conclusion, 5 years after the closure of OWEZ to fisheries, only subtle changes were measured in the local benthic community, i.e. a higher species diversity and an increased abundance and lengths of some bivalves. Depleted adult stocks, faunal patchiness, and a limited time for recovery (5 years) might explain that a significant recovery could not be found. The current study shows that designation of large-scale marine protected areas as planned for the North Sea will not automatically imply that restoration of benthic assemblages can be expected within a relatively short period of years.

scholarly journals An estimation of the effects of Ensis directus on the transport and burial of silt in the near-shore Dutch coastal zone of the North Sea

2017 ◽  
Vol 127 ◽  
pp. 95-104 ◽  
Author(s):  
Rob Witbaard ◽  
Magda J.N. Bergman ◽  
Evaline van Weerlee ◽  
Gerard C.A. Duineveld
Keyword(s):  
Coastal Zone ◽  
North Sea ◽  
The North ◽  
Near Shore ◽  
The North Sea

Coastal inundation in the north-eastern mediterranean coastal zone due to storm surge events

2010 ◽  
Vol 15 (3) ◽  
pp. 353-368 ◽  
Author(s):  
Yannis N. Krestenitis ◽  
Yannis S. Androulidakis ◽  
Yannis N. Kontos ◽  
George Georgakopoulos
Keyword(s):  
Storm Surge ◽  
Coastal Zone ◽  
Eastern Mediterranean ◽  
Coastal Inundation ◽  
The North ◽  
North Eastern

scholarly journals The impact of sedimentary alkalinity release on the water column CO<sub>2</sub> system in the North Sea

2016 ◽  
Vol 13 (3) ◽  
pp. 841-863 ◽  
Author(s):  
H. Brenner ◽  
U. Braeckman ◽  
M. Le Guitton ◽  
F. J. R. Meysman
Keyword(s):  
Coastal Zone ◽  
North Sea ◽  
Dissolved Inorganic Carbon ◽  
Co2 Uptake ◽  
Overlying Water ◽  
Southern North Sea ◽  
The North ◽  
Alkalinity Generation ◽  
The North Sea ◽  
The Impact

Abstract. It has been previously proposed that alkalinity release from sediments can play an important role in the carbonate dynamics on continental shelves, lowering the pCO2 of seawater and hence increasing the CO2 uptake from the atmosphere. To test this hypothesis, sedimentary alkalinity generation was quantified within cohesive and permeable sediments across the North Sea during two cruises in September 2011 (basin-wide) and June 2012 (Dutch coastal zone). Benthic fluxes of oxygen (O2), alkalinity (AT) and dissolved inorganic carbon (DIC) were determined using shipboard closed sediment incubations. Our results show that sediments can form an important source of alkalinity for the overlying water, particularly in the shallow southern North Sea, where high AT and DIC fluxes were recorded in near-shore sediments of the Belgian, Dutch and German coastal zone. In contrast, fluxes of AT and DIC are substantially lower in the deeper, seasonally stratified, northern part of the North Sea. Based on the data collected, we performed a model analysis to constrain the main pathways of alkalinity generation in the sediment, and to quantify how sedimentary alkalinity drives atmospheric CO2 uptake in the southern North Sea. Overall, our results show that sedimentary alkalinity generation should be regarded as a key component in the CO2 dynamics of shallow coastal systems.

scholarly journals First month of the epidemic caused by COVID-19 in Italy: current status and real-time outbreak development forecast

2020 ◽  
Author(s):  
Rosario Megna
Keyword(s):  
Real Time ◽  
Forecast Model ◽  
Current Status ◽  
Logistic Distribution ◽  
Infected People ◽  
The North ◽  
Heavy Burden ◽  
Novel Coronavirus ◽  
Health Organization ◽  
Collaborative Efforts

Abstract Background : The first outbreaks of COVID-19 in Italy occurred during the second half of February 2020 in some areas in the North of the country. Due to the high contagiousness of the infection, further spread by asymptomatic people, Italy has become in a few weeks the country with the greatest number of infected people in the World. The large number of severe cases among infected people in Italy led to the hospitalization of thousands of patients, with a heavy burden on the National Health Service. Methods: We analyzed data provided daily by Italian Authorities for the period from 24 February 2020 to 30 March 2020. Considering such information, we developed a forecast model in real-time, based on the cumulative logistic distribution. We then produced an estimate of the overall number of potentially infected individuals and epidemic duration at a national and Regional level, for the most affected Regions. Results: A total of 101,739 infected individuals was confirmed until 30 March 2020, of which 75,528 active cases, 14,620 recovered or discharged, and 11,591 deaths. Until the same date patients quarantined at home were 43,752, whereas hospitalized patients were 31,776, of which 3,981 in intensive care. The forecast model estimated a number of infected persons for Italy of 130,000 about, and a duration of the epidemic greater than 2 months. Conclusions : Once month after the first outbreaks there seems to be the first signs of a decrease in the number of infections, showing that we could be now facing the descending phase of the epidemic. The forecast obtained thanks to our model could be used by decision-makers to implement coordinative and collaborative efforts in order to control the epidemic. The pandemic due to novel Coronavirus must be a warning for all countries worldwide, regarding a rapid and complete dissemination of information, surveillance, health organization, and cooperation among the states.

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