2.0 Flashcards

1
Q

The loci of points that separates two adjacent watershed.

A

Watershed divide

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2
Q

A line that divides the highest point into two.

A

Ridgeline

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3
Q

The difference in elevation between two reference point

A

Watershed Relief

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4
Q

Difference between the highest point on watershed and watershed outlet.

A

Maximum Relief

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5
Q

Is the basic unit used in most hydrologic calculations

A

Watershed

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6
Q

It is the plot of flow vs time

A

Hydrograph

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7
Q

Watershed characteristics that affect hydrologic response

A

Size, shape, slope, soil type, storage

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8
Q

Naturally, the only thing that can control water is ______

A

Gravity

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9
Q

NRCS means

A

Natural Resources Conservation Service

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10
Q

Is responsible for developing soil maps to provide information on soil type, soil texture, and hydrologic soil groups.

A

NRCS

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11
Q

3 main soil classes

A

Sand
Silt
Clay

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12
Q

It is important in determining water-holding capacity and infiltration capacity of a soil layer.

A

Soil texture

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13
Q

Can be used to measure elevation changes.

A

Topographic maps or Field Surveys

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14
Q

Type _ infiltrates at the highest rate.

A

Type A

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15
Q

Particles smaller than 0.002mm

A

Clay

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16
Q

Particles ranging from 0.002 to 0.005mm

A

Silt

17
Q

Particles ranging from 0.005 to 2.0mm

A

Sand

18
Q

Particles larger than 2.0mm

A

Gravel

19
Q

Parameters or Physiographic characteristics frequently used in hydrologic studies.

A
  1. Total drainage area
  2. Impervious area in percentage of drainage area
  3. Average basin slope
  4. Hydraulic conductivity
  5. Hydrologic soil group and water capacity
  6. Land use of the basins
  7. Detention storage
  8. Percent of watershed upstream
  9. Percent of area drained