Physical Field Work - River Darent Flashcards

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1
Q

Justification of location

A

Horton Kirby close to river system, train link, walking distance, local amenities

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2
Q

Risks

A

Working with water environment; slips and cuts and falls

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3
Q

Three methods of data collection

A

River width, depth, sediment size

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4
Q

River width process

A

Distance between banks, define by erosion or deposition, measuring tape 3x sections (within 1/5 location) 1m apart, average derived

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5
Q

River depth process

A

Depth at each location, 3 measurements = 1x middle, 1x far bank, 1x near bank, reliable results

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6
Q

Sediment size process

A

Large or small sediment found on bed, defined by abrasion or attrition, 8 sediment samples 3x per location, high data yield for reliability

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7
Q

Data presentation methods

A

Line graphs (correlation, line of best fit for pattern), cross profiles (illustrate width and depth per site, highlight external factors and anomalies)

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8
Q

How was data reliable?

A

5 sites along river for indicative data of whole, 3x depth and width measurements (reduce anomalies increase accuracy), 2 sediment samples (mean for reliability)

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9
Q

Improve

A

More sites over larger distances as sample size was too small not indicative, more accurate measuring equipment as tape was dragged by current (laser measures), go other times of year

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10
Q

Observations/ conclusion

A

Followed Bradshaw model (sediment size got smaller/ higher depth downstream), yet did not fit into model with width (narrower) due to external factors. Conclusions somewhat yet not entirely fit with project expectations

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