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NRC 170 First Exam > Exercise 2: Geomorphometric Parameters > Flashcards

Exercise 2: Geomorphometric Parameters Flashcards

1
Q

overview

“geo” means ____ + “____” means form + “logos” means study

A

“geo” means earth + “morphe” means form + “logos” means study

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2
Q

overview

study of the earth’s surface landforms

A

geomorphology

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3
Q

overview

it aims to understand the ways in which landforms are created and to document the evolution of landforms through time

A

geomorphology

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4
Q
A
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5
Q

overview

geomorphology tackes which topics?

A
  • morphology
  • geomorphological processes
  • landforms
  • origins
  • ages
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6
Q

overview

it is the science of quantitative land-surface analysis

A

geomorphometry

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7
Q

overview

geomorphometry evolved from?

A
  • geomorphology
  • quantitative terrain analysis
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8
Q

overview

it describes landforms using mathematical equations

A

geomorphometry

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9
Q

overview

quantitative analysis of a watershed’s topographical surface; describes various geomorphological characteristics of the watershed using standard equations or formulas

A

geomorphometry

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10
Q

geomorphometric parameters

A
  1. dimensional characteristics
  2. shape parameters
  3. relief parameters
  4. stream order parameters
  5. drainage parameters
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11
Q

geomorphometric parameters

dimensional characteristics

A
  • basin parameter
  • basin area
  • basin length
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12
Q

geomorphometric parameters - dimensional characteristics

measure from the farthest drainage divide to the main outlet of the river basin following the principal flor path or the main channel

A

basin length

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13
Q

geomorphometric parameters

shape parameters

A
  • gravelius’ form factor
  • elongation ratio
  • circularity ratio
  • form factor
  • shape factor
  • lemniscate index
  • compactness coefficient
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14
Q

geomorphometric parameters - true or false

dimensional characteristics is needed for shape parameters

A

true

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15
Q

geomorphometric parameters

it describes the elongation or compactness of a watershed

A

shape parameters

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16
Q

geomorphometric parameters - shape parameters

for elongation ratio, circularity ratio, and form factor, the ____ (lower/higher) the value, the more
compact/circular the watershed is

A

for shape factor, lemniscate index, and compactness coefficient, the higher the value, the more
compact/circular the watershed is

17
Q

geomorphometric parameters - shape parameters

for shape factor, lemniscate index, and compactness coefficient, the ____ (lower/higher) the value, the more
compact/circular the watershed is

A

for shape factor, lemniscate index, and compactness coefficient, the lower the value, the more
compact/circular the watershed is

18
Q

geomorphometric parameters - shape parameters

circular basins …
- have ____ (faster/slower) movement of channel flow from the headwaters to the downstream;
- ____ (higher/lower) incidences of downstream flooding;
- surface runoff accumulates at a quicker rate in the watershed as it reaches the outlet

…compared to an elongated one of the same size

A

circular basins …
- have faster movement of channel flow from the headwaters to the downstream;
- higher incidences of downstream flooding;
- surface runoff accumulates at a quicker rate in the watershed as it reaches the outlet

19
Q

geomorphometric parameters

elevational values are need for this

A

relief parameters

20
Q

geomorphometric parameters

look at terrain and hot it infleces the stream gradient

A

relief parameters

21
Q

geomorphometric parameters

major factor in flood patterns and sediment transport

A

relief parameters

22
Q

geomorphometric parameters - relief parameters

in steep relied, channel flow and overland flow can travel ____ (faster/slower)

A

faster

23
Q

geomorphometric parameters - relief parameters

surface run-off has ____ (lower/higher) velocities in steeper watersheds
* ____ kinetic energy
* ____ turbulent streamflow
* ____ soil erosion rates
* ____ sediment yield

A

surface run-off has higher velocities in steeper watersheds
* ____ kinetic energy
* ____ soil erosion rates
* ____ sediment yieldfaster
* more turbulent streamflow

all blanks are higher

24
Q

geomorphometric parameters

relates streams to the watershed are

A

drainage parameters

25
Q

geomorphometric parameters

it covers stream distribution and dissection

A

drainage parameters

26
Q

geomorphometric parameters

relief parameters

A
  • basin relief
  • relief ratio
  • relative relief
  • ruggedness number
  • melton’s ruggedness number
27
Q

geomorphometric parameters

drainage parameters

A
  • stream frequency
  • texture ratio
  • drainage density
  • drainage intensity
  • length of overland flow
  • constant of channel maintenance
28
Q

geomorphometric parameters - drainage parameters

watersheds with ____ drainage texture
- have higher drainage segmentation
- allows more rapid overland flow

A

watersheds with fine drainage texture
- have higher drainage segmentation
- allows more rapid overland flow

29
Q

geomorphometric parameters

help determine hydrodynamic behavior of streamflow

A

stream order parameters

30
Q

geomorphometric parameters

stream order parameters

A
  • bifurcation ratio
  • stream length ratio
  • rho coefficient
31
Q

geomorphometric parameters - stream order parameters

higher order watersheds have ____ (larger/smaller) areas and higher streamflow volumes

A

higher order watersheds have larger areas and higher streamflow volumes

32
Q

geomorphometric parameters - stream order parameters

watersheds with ____ (high/low) bifurcation ratios
* Indicate more tributaries feed into larger streams
* If paired with low order length ratios
a. have higher flood incidences
b. higher channel erosion

A

watersheds with high bifurcation ratios
* Indicate more tributaries feed into larger streams
* If paired with low order length ratios
a. have higher flood incidences
b. higher channel erosion

NRC 170 First Exam (5 decks)

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