UH Lesson 2

What do you call a graph which is plotted for discharge versus time?

• Snow Graph

• Hydrograph

• Rain graph

• Fluid graph

Choose the correct sentence about information available from hydrograph among the following options?

• The mean annual runoff or mean runoff each week of the year

• Total volume at that instant, as the area under hydrograph indicates the force of water during the duration

• Rate of flow at any particular time during the duration period

• Mean runoff for each month

What does hydrograph based on the day give?

• Idea about flood period during the month

• Idea of rainfall

• Idea of draught during the year

• Idea of scarcity of water in the upcoming year

What information does the year-wise hydrograph give?

• Draught

• Heavy rainfall

• Rising cold

• Water scarcity

When is the Hydrograph called a unit hydrograph?

• When 1cm of runoff resulted from a rainfall

• When 3cm of runoff results from rainfall

• When 1mm of runoff results from rainfall

• When 3mm of runoff results from rainfall

Hydrographs of similar rainfalls will be similar in shape.

• True

• False

What is unit hydrograph helpful in?

• Estimating runoff from a basin

• Estimating no of days of rainfall

• Knowing the draught months in a year

• In deciding the land for the hydel power plant

The unit hydrographs can be successfully applied to basin areas of what sq km?

• 15000 sq km

• 10000 sq km

• 3000 sq km

• 25000 sq km

There are methods to analyze the unit hydrograph except;

• S-curve method

• Transition method

• superposition method

• superimposition method

Graph show __________ method to analyze unit hydrograph.

• S-curve

• Transition

• Superposition

• Superimposition