Lecture 7 - Reservoir Routing

Question 1

What is routing?

Answer 1

Prediction of translation and attenuation of inflow hydrographs through surface water impoundments and channels

Question 2

How can routing be applied in engineering hydrology?

Answer 2

detention sizing (detention/retention ponds for stormwater management, hydroelectric power reservoirs, municipal water supply reservoirs), flood modeling in river systems, runoff routing

Question 3

What are the assumptions used for reservoir routing with the level pool method?

Answer 3

water surface is level, outflow is controlled by water level in the reservoir and the hydraulic characteristics of the reservoir outflow structure, water level represents storage/volume of water in reservoir

Question 4

What is the depth-storage relationship defined by?

Answer 4

geometry of the reservoir

Question 5

What is the storage-outflow relationship defined by?

Answer 5

size/shape/type of reservoir outflow structure

Question 6

What is an orifice type outlet?

Answer 6

fixed gemoetric opening in a flow barrier (could be a horizontal pipe), opening is usually submerged

Question 7

What types of weir outlets are commonly used

Answer 7

rectangular or triangular shaped weir

Question 8

Explain linear and non-linear reservoir models for runoff routing.

Answer 8

catchment is viewed as a very shallow reservoir, inflow=rainfall excess (P-F), outflow is a linear/non-linear function of depth of flow on catchment