Civil Engineering (CE) Exam > Civil Engineering (CE) Notes > Topic wise GATE Past Year Papers for Civil Engineering > Past Year Questions: Flood Routing and Flood Control
Past Year Questions: Flood Routing and Flood Control | Topic wise GATE Past Year Papers for Civil Engineering - Civil Engineering (CE) PDF Download
Q1: A flood control structure having an expected life of n years is designed by considering a flood of return period T years. When T= n, and n→∞, the structure's hydrologic risk of failure in percentage is . (round off to one decimal place) [2022, Set-2]
Ans: (63 to 63.5)
Sol:
Risk of failure = 1 − qn = 1 − ( 1 − p ) n = 1 − ( 1 − 1/T )n
For T= n → ∞
Risk of failure = 1 − 1/e = 0.632
% risk of failure = 0.632 x 100 = 63.2%
Q1: Super passage is a canal cross-drainage structure in which [2020, Set-2]
(a) natural stream water flows with free surface below a canal
(b) natural stream water flows under pressure below a canal
(c) canal water flows with free surface below a natural stream
(d) canal water flows under pressure below a natural stream
Ans: (c)
Sol:
Cross-section of a super passage
Q2: Muskingum method is used in [2020, Set-2]
(a) hydrologic reservoir routing
(b) hydrologic channel routing
(c) hydraulic channel routing
(d) hydraulic reservoir routing
Ans: (b)
Sol: Muskingum method is used in hydrological channel routing
Q3: In a homogeneous unconfined aquifer of area 3.00 km2 , the water table was at an elevation of 102.00 m. After a natural recharge of volume 0.90 million cubic meter ( Mm2 ), the water table rose to 103.20 m. After this recharge, ground water pumping took place and the water table dropped down to 101.020 m. The volume of ground water pumped after the natural recharge, expressed (in Mm2 and round off to two decimal places), is ______.
Ans: (1.4 to 1.6)
Sol:
VR = 0.9Mm3
V = 3 x (103.2 - 102)
VD= 1.5 Mm3
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FAQs on Past Year Questions: Flood Routing and Flood Control - Topic wise GATE Past Year Papers for Civil Engineering - Civil Engineering (CE)
| 1. What is flood routing and why is it important in civil engineering? |  |
Ans.Flood routing is the process of determining the timing and magnitude of flood waves as they travel through a watershed or along a river. It is important in civil engineering because it helps in designing effective flood control measures, assessing flood risks, and planning for infrastructure that can withstand potential flooding.
| 2. What are the different methods of flood routing used in civil engineering? | |
Ans.The main methods of flood routing include the Muskingum method, the Modified Puls method, and the kinematic wave method. Each method has its own approach to estimating how flood waves will move through a watershed, taking into account factors such as storage and travel time.
| 3. How does flood control infrastructure mitigate flood risks? | |
Ans.Flood control infrastructure, such as levees, dams, and floodwalls, mitigate flood risks by controlling the flow of water, storing excess water, and redirecting floodwaters away from populated areas. These structures are designed to reduce the impact of flooding on communities and protect lives and property.
| 4. What role does hydrology play in flood routing and control? | |
Ans.Hydrology is crucial in flood routing and control as it involves the study of water movement, distribution, and quality in the environment. Understanding hydrological cycles and rainfall patterns helps engineers predict flooding events and design effective flood management systems that can respond to varying conditions.
| 5. What are the challenges faced in flood routing and control projects? | |
Ans.Challenges in flood routing and control projects include accurately predicting rainfall and runoff, integrating climate change effects, maintaining existing infrastructure, and securing funding for improvements. Additionally, public acceptance and environmental impacts of flood control measures can complicate project implementation.
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