The document discusses hydrographs, which record river discharge over time and show how rivers respond to rainstorms. It defines hydrographs as measuring river discharge through cross-sectional area times mean velocity. There are different types of hydrographs like storm, flood, and annual hydrographs. Analyzing hydrographs helps predict flooding events by finding discharge patterns of drainage basins, which can influence flood prevention measures.

1. The University of Azad
Jammu & Kashmir

2. CONSTRUCTION
&
ANALYSIS OF HYDROGRAPH

3. HYDROGRPH
Record of River Discharge ( the level of water flowing
down the river channel) over a period of time, they show
how rivers responds to a rainstorm.
• River Discharge:
The level of water flowing down a river is
calculated as:
River discharge = cross sectional area x rivers mean
velocity
(at a particular point in its course)

4. • Types of Hydrograph:
•Storm hydrographs
•Flood hydrographs
•Annual hydrographs
•Direct Runoff Hydrograph
•Strom Hydrograph:
Show the change in discharge caused by period
of rainfall.

5. Why
construct & Analyses
Hydrograph?
To find out discharge patterns of particular drainage basin.
Help to predict flooding events, therefore influence
implementation of flood prevention measures.

17. ANALYSIS