The Drainage Basin Flashcards Preview

Geography-- Water and Carbon Cycle > The Drainage Basin > Flashcards

Flashcards in The Drainage Basin Deck (14):
1

drainage basin definition

is the area of land surrounding a river, from which the river receives water and subsequently drains the water

2

what is the watershed

invisible line between 2 drainage basins

3

what is a tributary

a smaller river coming off the main river

4

what is the floodplain

low land directly next to the river

5

what is the confluence

the point where tributary and river meet

6

inputs into the drainage basin

precipitation

7

flows and transfers in the drainage basin

surface runoff/ overland flow, infiltration, percolation, groundwater flow, through flow

8

stores in the drainage basin

groundwater and soil moisture

9

outputs in the drainage basin

river channel, transpiration, evaporation

10

what is infiltration rate and what is it controlled by

on reaching the ground, water soaks into the soil by infiltration. the rate of this is called the infiltration rate.
this movement of water into the soil is controlled by gravity, capillary action and soil porosity (most important).

11

where does water flow fastest

along the surface-- as there are fewer obstacles slowing it down. urban surfaces= especially fast

12

2nd fastest way water flows

through soil-- but depends on the area

13

2nd slowest way water flows

clay soils retain water, hindering any movement

14

slowest way water flows

once in the rocks below the soil the rate of transfer considerably slows