rivers fieldwork

Primary data collection examples (4)

• width - tape measure

• depth - meter ruler

• velocity - orange, stopwatch for travel time

• gradient - clinometer

Secondary data examples (3)

• os maps to locate sites

• british geological survey to find out geology

• looked at past news articles

Weaknesses of your secondary data (3)

• quick to go outdated

• must consider reliability

• difficult to find relevant data

Strengths of secondary data (4)

• os maps allow suitable site choices

• allows us to back up our primary data

• we cannot collect historic data ourselves

• tells us the geology

Strengths of evaluation (3)

• repeated velocity readings 3x + average

• assigned roles

• secondary data collected

Weaknesses of evaluation (3)

• some faulty equipment

• orange got stuck

• could only measure shallow areas for safety

Improvements (3)

• use a flowmeter for velocity

• more sites for a wider range

• visit sites throughout year