Deck 22: How to Use Hydrologic Modeling Tools in Arcgis Pro

Question 1

The length of the stream is referred to as its:

A) Waterline
B) Run
C) Junction
D) Link

Answer 1

D

Question 2

An area where all of the water drains to a common location describes:

A) Watershed
B) Filled Sink
C) Small Basin
D) Water Retention

Answer 2

A

Question 3

In an ArcGIS Flow Direction calculation, a grid cell value of "4" indicates water flow in which direction?

A) North
B) West
C) East
D) South

Answer 3

D

Question 4

A filled sink results in a:

A) Common drainage point for the lateral flow of water
B) A depressionless elevation surface
C) An elevation surface without elevation error measurements
D) An area where water will be caught and unable to flow

Question 5

How does the Strahler method rank stream ordering?

A) The magnitude values of two streams that flow into each other are added together to become the magnitude value of the new stream.
B) Stream magnitude will increase only when two streams of the same magnitude flow into each other.
C) Stream magnitude will increase only when a lower-order stream flows into a higher-order stream.
D) The lower-magnitude value of two streams that flow into each other is subtracted from the higher-magnitude value, resulting in the magnitude value of the new stream.

Question 6

Which of the following Flow Direction methods is used in ArcGIS?

A) D8
B) K8
C) Rho8
D) S8

Question 7

In hydrologic modeling, the number of cells that connect to constitute a stream channel refers to the:

A) Water limit
B) Threshold
C) Sub-basin
D) Zone

Question 8

Stream channels can be directly extracted by querying which grid?

A) A flow direction grid
B) A flow accumulation grid
C) An elevation surface (such as a DEM)
D) A watershed grid

Question 9

What assumptions are made in the ArcGIS hydrologic modeling process?

A) All locations on the surface receive the same amount of rainfall and have the same soil characteristics.
B) All locations on the surface receive varying amounts of rainfall that are modeled using the flow accumulation tools.
C) All locations within a watershed have the same distribution of moisture in the soil.
D) Locations within a watershed are permitted to flow to different sources because they receive varying amounts of rainfall.

Question 10

The boundary of a watershed is the:

A) Drainage divide
B) Flow border
C) Hydro junction
D) Pour zone

Question 11

In an ArcGIS Flow Direction calculation, water is calculated to flow in:

A) A direction based on the amount of rainfall and the type of soil at a location
B) Two different directions, indicated by the two steepest slopes
C) The direction of the steepest slope
D) The direction opposite the flattest slope

Question 12

The ArcGIS tool that will determine how many cells flow into a location is:

A) Flow D8
B) Flow Linkages
C) Flow Direction
D) Flow Accumulation

Question 13

In an ArcGIS Flow Direction calculation, a grid cell value of "32" indicates water flow in which direction?

A) Northeast
B) Northwest
C) Southeast
D) Southwest

Question 14

The stream-ordering method that allows for the stream ranking order to be computed by adding the ranks of the two streams flowing into each other is:

A) Shreve
B) Stacking
C) Streaming
D) Skovoline

Question 15

A feature class that represents the outlet location for the drainage of water is a:

A) Flow line
B) Pour point
C) Stream node
D) Sub-basin

Question 16

What is a sink (in terms of hydrologic modeling)?

A) The lowest point in a raster surface
B) A low point surrounded by high points
C) A high point surrounded on all eight sides by low points
D) A set of cells that all of the same elevation value making flow impossible

Question 17

The determination of how many cells flow into a location best describes:

A) Flow drainage
B) Flow retention
C) Flow direction
D) Flow accumulation

Question 18

Data layers that are generated by ModelBuilder and then deleted as the model is run are referred to as:

A) Event data
B) Connective data
C) Index data
D) Intermediate data