Define 1 Baseflow 2 Direct runoff 3 Hyetograph 4 Streamflow

Define: (1) Baseflow: (2) Direct runoff (3) Hyetograph: (4) Streamflow hydrograph: (5) Unit hydrograph:

Solution

(1) Answer:- Base flow :- It is also known as drought flow .It is very important in water resources engineering. It is portion of stream flow delayed shallow subsurface flow.

(2) Answer:- Direct runoff:- It is that part of water which flow on ground surface to lakes, river, streams. It is also known as storm runoff.

(3) Answer:- Hyetograph :- It is very useful in determination of precipitation. It is a graphical representation of the distribution of rainfall intensity over time.

(4) Answer:- Streamflow hydrograph:- It is a graph that shows relation between rate of flow with time.

(5) Answer:- Unit hydrograph:- Unit hydrograph is very useful. It is a hydrograph resulting from one inch of constant intensity uniform rainfall occurring over the entire watershed.