1.2 Discharge relationships within drainage basins Flashcards
What is lag time on a hydrograph?
The difference between the peak of the rainstorm and the peak flow of the river
What is the rising limb on a hydrograph?
It shows the rising water in the river
What is the falling limb on a hydrograph?
It shows the falling flood water in the river
What is attenuation?
The reduction in the peak of a hydrograph as it moves downstream, resulting in a more broad, flat hydrograph.
What is drainage density?
The total length of surface streams per square kilometer.
What is porosity?
The percentage of void space in a rock
What is permeability?
The ability of material to allow water to pass through it
What is river competence?
The maximum size of particle that the river is capable of transporting
What is river capacity?
The total amount of load that a river can carry
