Human activities can significantly influence the rate of attrition on coastal beaches. Coastal engineering structures like groynes, breakwaters, and sea walls alter wave patterns and sediment transport, which can affect the natural process of attrition. For example, groynes may trap sediment on one side, reducing the amount of material available for attrition on the other side. This can lead to beaches with coarser, less eroded sediment. Additionally, activities such as dredging and aggregate extraction remove sediment from the coastal system, potentially reducing the material available for natural attrition processes. Pollution, particularly from oil spills and industrial waste, can also affect the physical properties of sediment, influencing the rate and nature of attrition. Furthermore, climate change-induced factors like rising sea levels and increased storm frequency can alter wave dynamics, potentially intensifying attrition processes. Therefore, human interventions and environmental changes play a significant role in shaping the attrition dynamics on coastal beaches.

The process of solution varies significantly with different rock types due to their varying mineral compositions and solubility. Rocks like limestone and chalk, which are primarily composed of calcium carbonate, are highly susceptible to solution. The carbonic acid in seawater reacts with calcium carbonate, leading to the dissolution of these rocks. This reaction is more pronounced in areas with acidic water, often influenced by environmental factors such as pollution or organic decay. Conversely, rocks like granite and basalt show much less susceptibility to solution due to their composition of less soluble minerals. These variations in rock solubility play a crucial role in shaping different coastal landscapes. For instance, limestone coastlines often feature distinctive landforms like sea caves and limestone pavements, whereas granite coastlines tend to be more rugged and less affected by chemical erosion.

Seasonal changes can have a profound impact on marine erosion processes such as hydraulic action and corrasion. During stormier seasons, typically autumn and winter in many regions, increased wind speed and storm frequency result in more energetic waves with greater erosive power. This heightened wave activity enhances the hydraulic action, leading to more significant erosion of coastal features like cliffs and rock formations. The increased wave energy also means more sediment is suspended and transported by the waves, intensifying the corrasion process. In contrast, during calmer seasons like spring and summer, the reduced wave energy results in less intense hydraulic action and corrasion. However, these seasonal variations can be influenced by geographical location and climate patterns. For instance, in tropical regions, monsoon seasons bring about drastic changes in wave conditions, significantly affecting the rate of marine erosion. Understanding these seasonal dynamics is essential for coastal management and planning, especially in areas prone to severe weather events and erosion.

Wave frequency, or the number of waves breaking on the coast over a given time, is a crucial factor in the process of corrasion/abrasion. Higher wave frequency results in more frequent impacts of sediment-laden water on the coast, enhancing the abrasive effect. This continuous bombardment by sediment-rich waves accelerates the erosion of coastal rocks and cliffs. The intensity of abrasion is also influenced by the energy and height of the waves; higher energy waves carry more sediment and have greater erosive power. Furthermore, the type and size of the sediment in the waves play a role. Larger and harder particles like pebbles and gravel can cause more significant abrasion compared to finer sediments like sand. Therefore, coastlines exposed to high wave frequencies and energy levels, particularly those with larger sediment particles, are more prone to rapid erosion through corrasion/abrasion.

The rate of marine erosion greatly depends on the type of coastline, primarily influenced by the geological composition and structure of the coast. Rocky coastlines composed of harder, more resistant rocks, such as granite or basalt, tend to erode slower due to their durability against erosive forces like wave action and abrasion. In contrast, softer rock types, such as chalk or sandstone, erode more rapidly under the same conditions. The structural features of the coast, including the presence of faults and joints, also play a significant role. Coasts with more cracks and joints are more susceptible to hydraulic action, leading to faster erosion. Moreover, the angle of wave approach and the frequency of storm events can accelerate erosion in certain areas, while sheltered areas may experience reduced erosion rates. Understanding these variations is crucial for predicting and managing coastal changes and for implementing appropriate coastal defense strategies.