Exercise 2: Geomorphometric Parameters Flashcards
overview
“geo” means ____ + “____” means form + “logos” means study
“geo” means earth + “morphe” means form + “logos” means study
overview
study of the earth’s surface landforms
geomorphology
overview
it aims to understand the ways in which landforms are created and to document the evolution of landforms through time
geomorphology
overview
geomorphology tackes which topics?
- morphology
- geomorphological processes
- landforms
- origins
- ages
overview
it is the science of quantitative land-surface analysis
geomorphometry
overview
geomorphometry evolved from?
- geomorphology
- quantitative terrain analysis
overview
it describes landforms using mathematical equations
geomorphometry
overview
quantitative analysis of a watershed’s topographical surface; describes various geomorphological characteristics of the watershed using standard equations or formulas
geomorphometry
geomorphometric parameters
- dimensional characteristics
- shape parameters
- relief parameters
- stream order parameters
- drainage parameters
geomorphometric parameters
dimensional characteristics
- basin parameter
- basin area
- basin length
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
basin length
geomorphometric parameters
shape parameters
- gravelius’ form factor
- elongation ratio
- circularity ratio
- form factor
- shape factor
- lemniscate index
- compactness coefficient
geomorphometric parameters - true or false
dimensional characteristics is needed for shape parameters
true
geomorphometric parameters
it describes the elongation or compactness of a watershed
shape parameters
geomorphometric parameters - shape parameters
for elongation ratio, circularity ratio, and form factor, the ____ (lower/higher) the value, the more
compact/circular the watershed is
for shape factor, lemniscate index, and compactness coefficient, the higher the value, the more
compact/circular the watershed is
geomorphometric parameters - shape parameters
for shape factor, lemniscate index, and compactness coefficient, the ____ (lower/higher) the value, the more
compact/circular the watershed is
for shape factor, lemniscate index, and compactness coefficient, the lower the value, the more
compact/circular the watershed is
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
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
geomorphometric parameters
elevational values are need for this
relief parameters
geomorphometric parameters
look at terrain and hot it infleces the stream gradient
relief parameters
geomorphometric parameters
major factor in flood patterns and sediment transport
relief parameters
geomorphometric parameters - relief parameters
in steep relied, channel flow and overland flow can travel ____ (faster/slower)
faster
geomorphometric parameters - relief parameters
surface run-off has ____ (lower/higher) velocities in steeper watersheds
* ____ kinetic energy
* ____ turbulent streamflow
* ____ soil erosion rates
* ____ sediment yield
surface run-off has higher velocities in steeper watersheds
* ____ kinetic energy
* ____ soil erosion rates
* ____ sediment yieldfaster
* more turbulent streamflow
all blanks are higher
geomorphometric parameters
relates streams to the watershed are
drainage parameters
