With the increase in capacity-inflow ratio, the trap efficiency of a reservoir

Explanation:

Trap Efficiency:

• Trap efficiency of a reservoir is the ratio of total sediments retained by the reservoir to the total sediments entering into the reservoir (inflow sediments).
• Trap efficiency of the reservoir is the function of the ratio of reservoir capacity and total inflow.
• The reservoir capacity is inversely related to the number of sediments deposited. As time passes, the rate of silting or the rate of deposition of sediments reduces but the amount of sediments deposited will be increased which in turn reduces the capacity of the reservoir. Hence, trap efficiency is also gets reduced.

Additional InformationOther factors affecting trap efficiency:

• Size of reservoir and stream: A larger reservoir on a small stream has less capacity inflow ratio and hence has higher trap efficiency.
• The velocity of flow of stream: Higher velocity less deposition of sediments, lower is the trap efficiency.