Pattern of Beach Erosion and Scour Depth along the Rosetta Promontory and their Effect on the Existing Protection Works, Nile Delta, Egypt

Frihy, Omran E.; Shereet, S. M.; Banna, Mahmoud M. El

doi:10.2112/07-0855.1

Cited by 30 publications

(13 citation statements)

References 13 publications

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“…It is important to highlight that these cells are limited by natural structures, whereas human-made structures interfere with natural sediment transport within major cells creating small sub-cells, as observed by Bray et al (1995) and Bray (1997) in South England, and by Frihy et al (2008) in the Nile river delta. This opposes the findings of Anfuso et al (2007) and Anfuso and Martinez (2009), which indicated how major cells were defined by human-made structures in the northern Mediterranean coast of Morocco and southern Sicily (Italy).…”

Section: Coastal Compartmentalisationmentioning

confidence: 99%

“…This is a commonly observed trend: Funakoshi et al (1994) recorded 1 m erosion near a submerged breakwater at Niigata (Japan), and Lamberti and Mancinelli (1996) recorded erosion landward and seaward of detached breakwaters in the Marche region (Italy). Frihy et al (2008) analysed the distribution of erosion/accretion areas and nearshore slope up to circa 6 m water depth (approximately 1 km offshore) related to the presence of coastal structures along the Nile Delta. They all observed that shoreface slope-facing seawalls changed progressively over time, becoming more reflective; values of vertical deepening reached 2.5 m at a 100 m distance from the seawall during the 1982-2000 period.…”

Section: Beach Slope and Coastal Trendmentioning

confidence: 99%

“…According to Lowry and Carter (1982), cells and sub-cells are confined by limits which can be classified as "fixed"-, if presenting large-scale temporal stability since being associated with humanmade or natural structures (in this case the term "morphological cells" is used), or as "free"-, if their position changes in time in association with wave divergence and convergence processes caused by submerged features that can migrate with time and/or affect wave propagation, according to specific characteristics of approaching waves (the term "littoral cells" is then used, according to Carter, 1988; Bray et al, 1995;Frihy et al, 2008). Limits can also be classified as "divergent" (littoral drift divides), "meeting" or "convergent" (littoral drift converges), or "pulse" (when the accretion is recorded at one limit side and erosion at the other side); and as "absolute" (when they act as barrier to all sediments), or "partial" or "permeable" (when allowing bypassing).…”

Section: Coastal Compartmentalisationmentioning

confidence: 99%

“…3 a, and 8). The transition point has the same meaning of nodal points described by Frihy et al (2008) for the Nile river delta.…”

Section: Coastal Compartmentalisationmentioning

confidence: 99%

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An integrated approach to coastal erosion problems in northern Tuscany (Italy): Littoral morphological evolution and cell distribution

2011

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Occupation of the coast has significantly increased in recent decades, mostly due to a greater demand for recreation and tourism. Today, erosion threatens many human-made structures and activities, requiring an integrated approach for the understanding of coastal dynamics and identification of alternatives to associated problems. This study investigates a 64 km-long coastal physiographic unit in the northern microtidal littoral of Tuscany (Italy). Vertical aerial photographs and direct field surveys were used to retrieve changes in shoreline position over 1938-1997 and 1997-2005 time intervals. Significant beach accretion was observed during the first period updrift of Carrara (84 m) and Viareggio (280 m) harbours and at Marina di Pietrasanta (100 m), whereas severe erosion occurred downcoast of Carrara harbour (− 130 m, at Marina dei Ronchi) and on the northern side of Arno river mouth (− 400 m). Similar trends were observed between 1997 and 2005; beach slope between the 1997 shoreline position and the closure depth correlated well with the distribution of erosion/accretion patterns from the 1938-1997 period (slopes were lower in eroded areas than at sites under accretion). Longshore distribution of erosion/accretion patterns was controlled by coastal compartmentalisation. Three of the main littoral cells were mostly formed by natural limits (i.e., Punta Bianca promontory, Marina di Pietrasanta, the Arno river mouth and the port of Livorno). Several sub-cells were created within these cells due to the introduction of human-made structures (such as Carrara and Viareggio harbours), which formed artificial fixed limits that allowed the transport of sediments (exclusively fines) in one direction only. Results will help improve the understanding of coastal processes and manage littoral sediment transport in a sustainable manner. This will reduce the need for structural interventions, such as breakwaters and groynes, which in the past decades prevented coastal retreat at local scale but shifted erosion downdrift, leading to degradation of the investigated area and requiring continuous maintenance.

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Section: Coastal Compartmentalisationmentioning

confidence: 99%

Section: Beach Slope and Coastal Trendmentioning

confidence: 99%

Section: Coastal Compartmentalisationmentioning

confidence: 99%

“…3 a, and 8). The transition point has the same meaning of nodal points described by Frihy et al (2008) for the Nile river delta.…”

Section: Coastal Compartmentalisationmentioning

confidence: 99%

See 2 more Smart Citations

An integrated approach to coastal erosion problems in northern Tuscany (Italy): Littoral morphological evolution and cell distribution

2011

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“…During the last decades, great attention has been paid to the most vulnerable coastal zones represented in promontories: Rosetta as shown in Figure 1, and Damietta. Rosetta promontory experiences a severe erosion threatens seawall which protects the retreat of the coastline [8]. The other challenge is the gathering of the sediments inside the inlet that hinders the navigation and affects ecological system [9].…”

Section: Introductionmentioning

confidence: 99%

Environmentally- Friendly Proposals for Coastal Stability at Rosetta Promontory, Nile Delta

Masria¹,

Abdelaziz²

2017

J Marine Sci Res Dev

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The coastal zone of Nile Delta Coast is a dynamic system which was in equilibrium or experienced huge amounts of sediment transported with the water discharges transfer from Nile branches to the Mediterranean Sea. A remarkable decrease in the sediment discharges arises with the construction of barrages, low Aswan dam, and Aswan High Dam south of the Nile river at beginning of the 20th century which trapped almost all the flood sediments behind. Consequently, the coastal zone has suffered from shoreline erosion, particularly at Rosetta, El Burullus, and Damietta. Not only erosion is the main challenge facing this coastal zones, but also, siltation inside the inlets discharge to the sea.A depth-averaged model has been used after calibration and validation, to study morphological changes around the nourishment area at Rosetta promontory, and testing the validity of some alternatives proposed to mitigate the outlet problems. Among these alternatives: diversion of side channel from the sea to the Nile River, and finally, the sand motor technique.The aim of this paper is to test different proposed alternatives and analyze it in terms of morph-dynamic processes to reach an applicable solution for the instability of the promontory.

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A review of sediment quantity issues: Examples from the River Ebro and adjacent basins (Northeastern Spain)

Batalla

Vericat

2011

Integr Envir Assess & Manag

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Sediment flows naturally through the drainage network, from source areas to deposition zones. Sedimentary disequilibrium in rivers and coastlines is related to the imbalance within the fluvial system caused mostly by dams, instream mining, and changes in land use. This phenomenon is also responsible for ecological perturbations in rivers and streams. A broad need exists to establish comprehensive management strategies (soft measures) that would go beyond site-specific engineering practices (technical measures) typically taken to solve particular problems. Long-term programs are also required to monitor sediment transport in river basins, in order to assess the magnitude and variability of sediment transfer and potential deficits. This paper shows examples of rivers with important sediment disequilibrium in the Ebro and adjacent basins. These basins, like most in the Iberian Peninsula, experience sediment discontinuity in the catchment-river-coast system. Reservoir siltation is the main quantitative issue. Land use change and especially gravel mining downstream from dams accentuate the process. We also present and discuss recent developments on water and sediment management undertaken to improve the morphosedimentary dynamics of rivers.

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Pattern of Beach Erosion and Scour Depth along the Rosetta Promontory and their Effect on the Existing Protection Works, Nile Delta, Egypt

Cited by 30 publications

References 13 publications

An integrated approach to coastal erosion problems in northern Tuscany (Italy): Littoral morphological evolution and cell distribution

An integrated approach to coastal erosion problems in northern Tuscany (Italy): Littoral morphological evolution and cell distribution

Environmentally- Friendly Proposals for Coastal Stability at Rosetta Promontory, Nile Delta

A review of sediment quantity issues: Examples from the River Ebro and adjacent basins (Northeastern Spain)

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