W1 QUIZ (LECT 1-3)

Natural and environmental factors play a crucial role in the design and operation of Storage or Conservation Reservoir.

• TRUE

• FALSE

The Angat-Ipo-La Mesa Dam Raw Water system is the major source of water for the whole Luzon. The water abstracted from is treated in the Balara Treatment Plant and La Mesa Treatment Plant.

• The first statement is TRUE, while the second statement is FALSE.

• The first statement is FALSE, while the second statement is TRUE.

• Both statements are TRUE.

• Both statements are FALSE.

Answer explanation

Correct Answer: The Angat-Ipo-La Mesa Dam Raw Water system is the major source of water for "Metro Manila".

From Aqueduct No. 3, water flows to Balara Treatment Plant No. 1. The water from Aqueduct No. 1 also goes to Balara Treatment Plant No. 1.

• The first statement is TRUE, while the second statement is FALSE.

• The first statement is FALSE, while the second statement is TRUE.

• Both statements are TRUE.

• Both statements are FALSE.

Answer explanation

Correct Answer:

From Aqueduct No. 3, water flows to "Balara Treatment Plant No. 2."

The water from Aqueduct No. 1 goes to Balara Treatment Plant No. 1

The sediment load is computed by dividing weight of the sediment by the weight of the sediment and water in the sample and multiplying the quotient by 10^6. It is expressed in parts per millimeter (ppm).

• The first statement is TRUE, while the second statement is FALSE.

• The first statement is FALSE, while the second statement is TRUE.

• Both statements are TRUE.

• Both statements are FALSE.

Answer explanation

Correct Answer:

Sediment load is expressed in "parts per million (ppm)."

For short deep reservoirs, we can assume a level water surface. For shallow and narrow reservoirs, the water surface at high flows may not be horizontal.

• The first statement is TRUE, while the second statement is FALSE.

• The first statement is FALSE, while the second statement is TRUE.

• Both statements are TRUE.

• Both statements are FALSE.

Answer explanation

Correct Answer: The Angat-Ipo-La Mesa Dam Raw Water system is the major source of water for "Metro Manila".

The Minimum Pool Level is the volume between the minimum and normal pool levels. The Normal Pool level is the lowest elevation to which pool is to drawn under normal conditions.

• The first statement is TRUE, while the second statement is FALSE.

• The first statement is FALSE, while the second statement is TRUE.

• Both statements are TRUE.

• Both statements are FALSE.

Answer explanation

Correct Answer:

The "Useful Storage" is the volume between the minimum and normal pool levels.

The "Minimum Pool Level" is the lowest elevation to which pool is to drawn under normal conditions.

The critical yield is the maximum quantity of water that can be guaranteed during a critical dry period. The tertiary yield is the water available in excess of safe yield during high flow.

• The first statement is TRUE, while the second statement is FALSE.

• The first statement is FALSE, while the second statement is TRUE.

• Both statements are TRUE.

• Both statements are FALSE.

Answer explanation

Correct Answer:

The "safe or firm" yield is the maximum quantity of water that can be guaranteed during a critical dry period.

The "secondary" yield is the water available in excess of safe yield during high flow.

In a mass curve analysis, a demand curve with a uniform rate are curve. If it is not uniform, it is transformed into a straight line.

• The first statement is TRUE, while the second statement is FALSE.

• The first statement is FALSE, while the second statement is TRUE.

• Both statements are TRUE.

• Both statements are FALSE.

Answer explanation

Correct Answer:

Demand curves representing a uniform rate of demand are straight lines.

If the demand is not uniform, the demand line becomes a curve, but the analysis is the same.

The La Mesa watershed receives an average annual rainfall of 2,000mm. The New Ipo watershed receives an average annual rainfall of 3,200mm.

• The first statement is TRUE, while the second statement is FALSE.

• The first statement is FALSE, while the second statement is TRUE.

• Both statements are TRUE.

• Both statements are FALSE.

Answer explanation

Correct Answer: The New Ipo watershed receives an average annual rainfall of "3,500mm".

In sediment transportation, the larger suspended particles and most of the bed load are deposited farther down the reservoir. The smaller particles remain in suspension and are also deposited farther down the reservoir.

• The first statement is TRUE, while the second statement is FALSE.

• The first statement is FALSE, while the second statement is TRUE.

• Both statements are TRUE.

• Both statements are FALSE.

Answer explanation

Correct Answer:

The larger suspended particles and most of the bed load are "deposited as delta at the head of the reservoir. "