scholarly journals Mesozooplankton in a stressed area of the Nile Delta Coast, Egypt.

2019 ◽  
Vol 23 (5) ◽  
pp. 89-105
Author(s):  
Mohamed Dorgham ◽  
Wael El-Tohamy ◽  
Jian Qin ◽  
Nagwa Abdel-Aziz ◽  
Ahmed El-Ghobashy
Keyword(s):  
Nile Delta ◽  
Nile Delta Coast

scholarly journals Effects of waves and currents on the siltation problem of Damietta harbour, Nile Delta coast, Egypt

2007 ◽  
Vol 8 (2) ◽  
pp. 33 ◽  
Author(s):  
ABO BAKER.I. ABO ZED
Keyword(s):  
Sediment Transport ◽  
Nile Delta ◽  
Monitoring Program ◽  
Wave Direction ◽  
Littoral Drift ◽  
Wave Refraction ◽  
The North ◽  
Dynamic Factors ◽  
Navigation Channel ◽  
Nile Delta Coast

This study evaluates the effect of prevailing dynamic factors on the sedimentation process in Damietta Harbour along the Nile delta coast of Egypt. The monitoring program spanned the period between 1978 and 1999 and included measurements of waves, currents and bathymetric profiles. The evaluation was based on determination of erosion and accretion rates, current regime, sediment transport, wave characteristics and wave refraction. Results revealed that the predominant wave direction from N-NW sector (86 %) throughout the year is responsible for generation of a longshore eastward current. Less frequent waves from the N-NE sector generate an opposing longshore westward current. The refraction pattern for the prevailing wave direction indicates that the harbour and its navigation channel are located within a divergence of wave orthogonal and in an accretion sediment sink area. The annual net rate of littoral drift on the western side of the harbour is about 1.43 * 105 m3 (accretion), while the annual net rate of littoral drift on the eastern side is about 2.54 * 105 m3 (erosion). Currents fluctuate tremendously in speed and direction, especially during the winter months. Hence, sediment transport takes place in offshore, eastward, and onshore directions. Progressive vector diagrams show that the largest near bottom offshore, onshore and easterly net drift occurs during summer, spring and winter respectively. The onshore sediment transport generated during spring and summer plays an important role in the redistribution of eroded sediments during the winter. The overall study of dynamic factors indicated that the harbour site is characterized by eastern, western, offshore and onshore sediment movements. Therefore, the north-south orientation of the navigation channel, with its depth greater than the surrounding area, interrupts sediment drift from different directions and reduces the current speed. Consequently, the sediments sink within the navigation channel from different directions. The sources of sediments contributing to the siltation process of the harbour and its navigation channels are mainly derived from the Rosetta promontory, Burullus beaches, Damietta promontory and from offshore and the dumping area.

Predynastic human presence discovered by core drilling at the northern Nile delta coast, Egypt

Geology ◽  
2008 ◽  
Vol 36 (8) ◽  
pp. 599 ◽  
Author(s):  
Jean-Daniel Stanley ◽  
Thomas F. Jorstad ◽  
Maria Pia Bernasconi ◽  
Dennis Stanford ◽  
Margaret Jodry
Keyword(s):  
Nile Delta ◽  
Core Drilling ◽  
Human Presence ◽  
Nile Delta Coast

scholarly journals LONGSHORE CURRENTS AND WAVES AT BURULLUS COAST

1974 ◽  
Vol 1 (14) ◽  
pp. 39
Author(s):  
M. Manohar ◽  
I.E. Mobarek ◽  
A. Morcos
Keyword(s):  
Nile Delta ◽  
Current Data ◽  
Radiation Stress ◽  
Longshore Currents ◽  
Littoral Current ◽  
Nile Delta Coast ◽  
Semi Empirical ◽  
Best Fit ◽  
Comprehensive Studies

Littoral currents within the breaker zone and currents other than those induced by waves beyond the breaker zone exist with considerable magnitude along the Nile Delta coast. Analysis of the littoral currents within the breaker zone by four semi-empirical formulae involving energy, momentum and radiation stress principles indicates good correlation between predicted and observed velocities. Galvin-Eagleson approach gives the best fit. Current data are statistically analysed enabling the determination of the magnitude, direction and percentage of occurrence of any particular littoral current for any particular period. More comprehensive studies of the currents climate within the breaker zone and beyond the breaker zone for the entire Nile Delta coast covering a large number of years are under way,

scholarly journals THE NILE DELTA C0ASTA1 PROTECTIOH PROJECT

1972 ◽  
Vol 1 (13) ◽  
pp. 74
Author(s):  
Ismail E. Mobarak
Keyword(s):  
Nile Delta ◽  
Laboratory Studies ◽  
Planning And Design ◽  
Long Term Study ◽  
Extensive Field ◽  
Severe Erosion ◽  
Nile Delta Coast ◽  
Sea Wall ◽  
The 19Th Century ◽  
Ras El Bar

The Nile Delta Coast on the Mediterranean Sea was formed through many centuries. The two existing main branches of the River Nile, i.e. Rosetta and Damietta, succeeded over the ages in forming two peninsulas or protrusions in the sea. By the end of the 19th century erosion started at several important points of the coast, causing damages to the national economy, either directly or indirectly. This erosion has increased tremendously during the last decade. Several field and laboratory studies were carried out during the last few years, concentrating on the severely attacked areas, such as Ras-EL-Bar, Burullas, Rosetta,Maadia. Based on the quick field and laboratory studies, remedial constructions are designed for the locations of severe erosion* Groins for Ras-El-Bar with artificial sand feeding and stone pitching and a wall for the Damietta estuary. A large groin for Burullos outlet which developed some advantageous changes even before finishing its execution,, and sea wall for Maadia. All the above projects are discussed and explained. A long term study project was started early in 1971 to collect the data necessary for a better understanding of the problem. The aims of this project are as follows: (1) To determine the historical formation of the Delta and forecasting future changes ; (2) Study the Meteorology and the Hydrodynamics of the area ; hindcasting and starting a new forecasting technique for them; (3) Planning and design of protective constructions for the coast is to be gained. All the above will be based on an extensive field data collection programme, mathematical models and hydraulic scale models. 1409

scholarly journals Proximate Composition, Bioactive Compounds, and Antioxidant Potential of Wild Halophytes Grown in Coastal Salt Marsh Habitats

Molecules ◽  
2021 ◽  
Vol 27 (1) ◽  
pp. 28
Author(s):  
Yasser A. El-Amier ◽  
Walid Soufan ◽  
Khalid F. Almutairi ◽  
Nouf S. Zaghloul ◽  
Ahmed M. Abd-ElGawad
Keyword(s):  
Antioxidant Activity ◽  
Bioactive Compounds ◽  
Proximate Composition ◽  
Nutritive Value ◽  
Nile Delta ◽  
Soluble Sugars ◽  
Forage Production ◽  
Coastal Salt Marsh ◽  
Total Carbohydrates ◽  
Nile Delta Coast

Halophytes have been characterized as a potential resource for fiber, food, fodder, and bioactive compounds. Proximate composition, bioactive compounds, and antioxidant activity of five wild dominant halophytes (Arthrocnemummacrostachyum, Halocnemumstrobilaceum, Limoniastrummonopetalum, Limoniastrumpruinosum, and Tamarix nilotica) naturally growing along the Nile Delta coast were assessed. The soil supporting these halophytes was sandy to sand-silty, alkaline, with low organic carbon, and relatively high CaCO3. H. strobilaceum attained the highest moisture content, ash, crude fiber, lipids, and total soluble sugars. L. monopetalum showed the highest content of crude protein (18.00%), while T. nilotica had the highest content of total carbohydrates. The studied halophytes can be ranked according to their nutritive value as follows: H.strobilaceum > L.monopetalum > A.macrostachyum > L.pruinosum > T. nilotica. A. macrostachyum attained the highest amount of Na+, K+, Ca2+, and Mg2+. A. macrostachyum showed a high content of phenolic compounds, while H.strobilaceum was rich in tannins and saponin contents. The MeOH extract of A. macrostachyum and H. strobilaceum exhibited substantial antioxidant activity. The present results showed that the studied halophytes could be considered as candidates for forage production or used as green eco-friendly natural resources for bioactive compounds.

scholarly journals WAVE STATISTICS ALONG THE NORTHERN COAST OF EGYPT

1974 ◽  
Vol 1 (14) ◽  
pp. 5
Author(s):  
M. Manohar ◽  
I.E. Mobarek ◽  
A. Morcos ◽  
H. Rahal
Keyword(s):  
Nile Delta ◽  
Spectral Band ◽  
Northern Coast ◽  
Wave Statistics ◽  
Wave Measurements ◽  
Narrow Spectral Band ◽  
Wave Heights ◽  
Significant Wave Heights ◽  
Nile Delta Coast ◽  
Comprehensive Study

As a forerunner of a comprehensive study of wave and energy climate of the Nile Delta coast covering a period of more than 50 years, wave measurements taken in 3 locations along the coast in the year 1972 were statistically analysed. Shortcut methods based on statistical approach were used to analyse the wave records enabling quicker analysis. Spectral analysis of the wave records indicates narrow spectral band similar to Raleigh distribution. The histograms and frequency distribution curves of significant wave heights, and the relationships between various statistical prarameters such as H , H,,,„, H,,„ and H also max 1/10' 1/3 rms agree closely with Raleigh distribution curves and parameters enabling the use of Raleigh distribution function in subsequent studies. Finally since the wave characteristics and wave energy climates are most important in the analysis of coastline changes, they are drawn from the data obtained from the analysis.

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