Landscape Fieldwork (OCR GCSE Geography B (Geography for Enquiring Minds)): Revision Notes

Landscape Fieldwork

Introduction

Fieldwork is a crucial component of geographical investigation that allows you to collect primary data in real environments. This topic covers how to plan and conduct fieldwork investigations in both coastal and river landscapes. You will learn about the stages of planning, the methods available for data collection, and the safety considerations that must be taken into account before any fieldwork takes place.

Planning a coastal fieldwork investigation

Stages of fieldwork investigations

All fieldwork investigations, whether conducted at coastal or inland locations, should follow a structured approach consisting of six key stages:

Stage 1: Develop a question or hypothesis Begin by formulating a clear enquiry question or developing a testable hypothesis. This provides focus and direction for your investigation. Your question should be specific, measurable, and answerable through fieldwork data collection.

Stage 2: Select appropriate fieldwork methods Choose the most suitable data collection techniques that will help you answer your question effectively. The methods you select should be practical, safe, and appropriate for your location and resources.

Stage 3: Process and present data Once data has been collected, it needs to be organized and displayed clearly. This typically involves creating maps, graphs, diagrams, and other visual representations that make patterns and relationships easier to identify.

Stage 4: Analyse and explain data Examine the data you have collected carefully, looking for patterns, trends, and anomalies. Use your geographical knowledge to explain what the data shows and why these patterns might exist.

Stage 5: Draw conclusions Use evidence from your data analysis to answer your original question. Your conclusions should be directly linked to the evidence you have gathered and should address your initial hypothesis or question clearly.

Stage 6: Reflect and evaluate Consider the entire investigation process critically. Evaluate the strengths and limitations of your methods, identify sources of error or bias, and suggest how the investigation could be improved if repeated.

Coastal fieldwork methods

Coastal environments offer excellent opportunities for fieldwork because they are dynamic landscapes where processes can be observed directly. Several specialized methods have been developed for coastal investigations:

Beach profile survey This method involves measuring changes in beach slope at various locations along the coastline. By taking measurements at regular intervals from the back of the beach to the waterline, you can create a cross-sectional profile showing how the beach gradient varies. This data reveals information about beach morphology and can indicate how wave action and sediment movement shape the coast.

Beach material survey This technique focuses on measuring the shapes and sizes of beach material (sediment) at different points along the beach. By examining pebble or sand characteristics such as size, roundness, and sorting, you can identify patterns that reflect sediment transport processes. Typically, larger and more angular material is found toward the back of the beach, while smaller, rounder pebbles are found nearer the water.

Wave survey This method measures the movement of pebbles or other sediment along the beach over time. By marking stones and tracking their position after a period of time, you can determine the direction and rate of longshore drift. This provides evidence of sediment transport processes and dominant wave directions.

Coastal management survey This involves mapping and recording the different management strategies employed along a stretch of coastline. You document the types of coastal defenses present (such as groynes, sea walls, or rock armour) and their locations, creating a comprehensive picture of how the coast is managed.

Cost/benefit analysis This evaluative method involves scoring or assessing the costs and benefits of different coastal management strategies. Costs might include financial expense, environmental damage, or visual impact, while benefits could include property protection, beach preservation, or enhanced recreational value.

Fieldwork equipment

Various pieces of equipment are essential for conducting coastal fieldwork effectively:

• Paint and paintbrushes: Used to mark stones or pebbles for wave surveys and sediment tracking studies
• Pebbles: Sample materials that can be marked and tracked to study sediment movement
• Corks: Lightweight floating objects that can be used to measure water movement and current direction
• Tape measure: Essential for measuring distances, beach widths, and spacing between features
• Clinometer: A specialized device for measuring angles of slope, crucial for creating accurate beach profiles
• Ranging poles: Vertical markers used to establish straight survey lines and measure heights or depths

Safety considerations

The most critical aspect of any fieldwork is ensuring the safety of all participants. Before conducting coastal fieldwork, you must complete a thorough risk assessment.

This involves:

• Identifying potential hazards (such as incoming tides, slippery rocks, unstable cliffs, or deep water)
• Assessing the likelihood and severity of risks
• Implementing control measures to minimize dangers
• Ensuring appropriate supervision and emergency procedures are in place
• Checking weather forecasts and tide times
• Ensuring appropriate clothing and equipment are worn

Planning a river fieldwork investigation

Reasons for conducting river fieldwork

Rivers and coastal areas both offer valuable opportunities for geographical fieldwork, though each presents different advantages:

Rivers provide excellent locations for observing geomorphic processes in action. You can witness how flowing water shapes the landscape through erosion, transportation, and deposition. The river channel, its load, and surrounding valley features provide tangible evidence of these processes.

River environments offer practical opportunities for data collection through measurement, counting, and surveying techniques. The linear nature of rivers makes them ideal for systematic sampling along the channel's length, allowing you to investigate how river characteristics change downstream.

Like coastal fieldwork, river investigations can be enjoyable and engaging, but safety must always be the primary consideration. Never enter water that is too deep, fast-flowing, or cold, and always work under proper supervision with appropriate safety measures in place.

Site selection factors

Not all rivers are suitable for fieldwork purposes. When selecting a river location or specific sites along a river for investigation, several important factors must be considered:

Size of the river The river's width and depth are crucial considerations. Sites should be accessible and safe, meaning the water should be shallow enough to wade in safely (typically no more than knee-deep) and narrow enough to measure across effectively. Very large or deep rivers pose significant safety risks and practical difficulties.

River flow Water should be flowing at a moderate pace – fast enough to be measurable but not so rapid that it creates hazards. Completely dry channels offer no opportunity to measure flow, while very fast currents are dangerous and make accurate measurements difficult.

Land ownership and access You must be able to legally and safely access the river location. This means obtaining permission from landowners when necessary and ensuring there is safe access to and from the site without trespassing on private land or crossing hazardous terrain.

River fieldwork methods

Several specialized methods have been developed for investigating river characteristics and processes:

Channel survey This fundamental method involves measuring the width and depth of the river at points along its length. By taking regular measurements across the channel (typically at equal intervals), you create a cross-sectional profile showing the channel's shape. This data reveals information about channel morphology and can be compared between different sites to identify downstream changes.

Flow survey This technique measures the speed of water flowing along the river channel. Common methods include timing floating objects over a set distance or using a flow meter. By measuring flow velocity at different points across and along the channel, you can identify patterns in water movement and calculate discharge (volume of water flowing past a point per second).

River load survey This method focuses on measuring the shapes and sizes of sediment (the river's load) along the channel. By examining sediment characteristics such as particle size, roundness, and sorting at different sites, you can identify patterns that reflect transport processes. Generally, sediment becomes smaller and more rounded in a downstream direction due to attrition.

Valley slope survey This technique involves measuring the gradient of the valley sides along the river. Using clinometers and ranging poles, you can measure slope angles at different heights up the valley side. This data provides information about valley morphology and can indicate different stages of river development.

Water quality survey This method assesses the ecological health of the river by counting living organisms in the water. Different organisms have different tolerances to pollution, so the species present indicate water quality. Sites with many pollution-sensitive species have good water quality, while sites dominated by pollution-tolerant species indicate poorer conditions.