The Nile Delta, a low energy coastal environment, Case study 4.5 / 5 based on 2 ratings ? GeographyCase studiesA2/A-levelOCR Created by: GeorgiaLawson248Created on: 22-05-18 14:47 For how many years has deposition exceeded erosion rates in the Nile Delta? 3000 years 1 of 28 How long is the Nile? 6650km 2 of 28 How large is the catchment area? 3 million km2 3 of 28 What is the annual rainfall in the catchment area? 600mm 4 of 28 Where does the Nile originate Ethiopia, Central Africa and Rwanda 5 of 28 What is the Nile's suspension load? 30% clay, 40% silt, 30% fine sand 6 of 28 What is the average sediment yield? 91.3 million tonnes 7 of 28 What are the three different coastal plains? Foreshore plain, frontal plain and sandy zone 8 of 28 What are the landforms on the foreshore plain? Ridges, lagoons, salt marshes and alluvial deposits 9 of 28 What are the landforms on the frontal plain? Limestone outcrops and clay deposits 10 of 28 What are the landforms on the sandy zone? Dunes and hummocks 11 of 28 Where does the delta begin to split? Cairo 12 of 28 When was the Aswan High Dam built? 1964 13 of 28 After the annual flood, what are the deposit depths at Aswan and Cairo? 4m and 9.6m 14 of 28 What does the Mediterranean wave action do? Redistributes sediment 15 of 28 What landforms does this create? Curved barrier bars and lagoons 16 of 28 What is the wind direction? Northwest 17 of 28 What direction is the sediment moving? East 18 of 28 What % of waves come from the Northwest/North 55-60% 19 of 28 What % of waves come from the Northeast 8% 20 of 28 What are the resultant nearshore features? Underwater sand bars 21 of 28 Where do the parallel longshore bars exist? Between Abu Qir and Port Said 22 of 28 The crescent bars west of Abu Qir headland are associated with what? Rip currents and weak longshore drift 23 of 28 What two factors has the Aswan High Dam influenced the most? Erosion and accretion 24 of 28 How much has accretion changed? 120 million tonnes to trace amounts today 25 of 28 How high has erosion rates accelerated to? 148m per year 26 of 28 How much is the sea level rising? 1.2mm per year 27 of 28 What effect does rising sea levels have? deeper water produces larger waves with higher amounts of energy which reach further inland 28 of 28
Comments
No comments have yet been made