Factors affecting coastal processes and landforms

Coastal processes and landforms are shaped by a combination of factors including wave energy, tidal range, geology, and human intervention. Understanding these factors is essential for predicting how coastlines evolve over time, which has significant implications for coastal management, habitat conservation, and human settlements. In the WJEC A-Level Geography syllabus, this topic forms part of the 'Coastal Landscapes' theme, where you explore the dynamic interactions between physical processes and human activity.

Key processes such as erosion, transportation, and deposition are driven by wave action, but their effectiveness depends on factors like fetch (the distance wind travels over water), wave type (constructive vs. destructive), and the resistance of the underlying rock. For example, hard rock cliffs (e.g., granite) erode slowly, producing steep, rugged landforms like headlands, while soft rock (e.g., clay) erodes rapidly, forming gentle slopes and wide bays. Tidal range also plays a crucial role: macro-tidal coasts (e.g., the Severn Estuary) experience strong tidal currents that redistribute sediment, whereas micro-tidal coasts (e.g., the Mediterranean) are dominated by wave action.

This topic is not just about memorising landform names; it requires you to analyse how different factors interact to produce distinctive coastal landscapes. For instance, the formation of a spit involves longshore drift (transportation), changes in wave direction, and the presence of a river estuary. By understanding these interactions, you can evaluate why certain coastlines are more vulnerable to erosion or why some areas experience rapid deposition. This knowledge is directly applicable to real-world issues like coastal erosion management and climate change adaptation.