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Hydrologic floodplain, the land adjacent to the baseflow channel residing below bankfull elevation. It is inundated about two years out of three. Not every stream corridor has a hydrologic floodplain.

Topographic floodplain, the land adjacent to the channel including the hydrologic floodplain and other lands up to an elevation based on the elevation reached by a flood peak of a given frequency; for example, the 1-percent (100 year) floodplain.

Another way to look at it, in an incising channel, that is to say that the river is cutting into valley, will create two floodplain benches, the lower and narrow one the hydrologic floodplain and the higher and much wider one the topographical floodplain.

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12y ago
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2w ago

The topographic floodplain is determined by the land elevation and topography that would be inundated during a flood event. The hydrologic floodplain is based on the extent of potential flooding calculated using hydrological modeling considering factors like streamflow and precipitation. Topographic floodplain uses physical features of the landscape, while hydrologic floodplain uses scientific analysis of water flow and volume.

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Q: What is the difference between the topographic floodplain and the hydrologic floodplain?
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How would a topographic map help you determine a floodplain?

A topographic map shows elevation contours, allowing you to identify low-lying areas prone to flooding. By analyzing the topography, you can locate areas with gentle slopes where water might accumulate, indicating potential floodplains. The map helps in visualizing the land's contour and understanding how water might flow during a flood event.


What On a topographic map what indicates the difference in elevation between adjacent lines?

Contour interval


On a topographic map what indicates the difference in elevation between adjacent lines?

Contour interval


On a topographic map the difference in elevation between one contour line and the next is the?

contour interval. It represents the vertical distance between each contour line on the map. This interval is typically consistent across the map and can vary based on the scale of the map and the type of terrain being represented.


On a topographic map where would you locate the contour interval in the margin?

It would be the difference between the two darker lines, or index lines, and then divide the space in between with your difference.


What is a relief on a topographic map?

The relief is the difference between the highest and lowest contour line.


How do you calculate the total relief on a topographic map?

To calculate the total relief on a topographic map, subtract the elevation of the lowest contour line from the elevation of the highest contour line within the map area. This difference represents the total vertical distance between the highest and lowest points on the map.


On a topographic map he difference in elevation between two side-by-side contour lines is called?

The difference in elevation between two side-by-side contour lines on a topographic map is called the contour interval. It represents the vertical distance between each contour line and helps depict the steepness of the terrain.


The major difference between a topographic map and other maps is that a topographic map shows .?

A topographical map shows elevations. They are more useful than other types of maps when looking for information about landforms, their locations, and their heights.


What is the relationship between the hydrologic cycle and thermal energy?

Well, without the sun, witch is heat, the is no evaporation. Without evaporation there is no hydrologic cycle.


What tells the difference in elevation between two adjacent lines on a topographic map?

The contour lines on a topographic map represent the difference in elevation between two adjacent lines. The closer together the contour lines are, the steeper the terrain. If the lines are spaced far apart, it indicates a gentle slope. The contour interval, which is typically shown in the map's legend, specifies the difference in elevation between each contour line.


Constant movement of water between the atmosphere and earth?

The hydrologic cycle.