Floodplain Management - Exam 1 (1-2) Questions and Answers 100% Solved

Floodplain Management - Exam 1 (1-2) Questions and Answers 100% Solved Which one of the following is a flood according to the NFIP definition? A. A washing machine springs a leak flooding a home utility room B. Over a period of years, river erosion undermined a home foundation C. A city water main ruptures flooding several buildings in San Francisco D. A culvert plugged by debris and the ditch overflows flooding a home C. A city water main ruptures flooding several buildings in San Francisco If you purchase flood insurance today, it does not become effective for a month. Which of the following it the reason for delay? A. It takes a month to get the paperwork through B. In some areas flooding takes 2 or more weeks to develop C. They have to wait to make sure your check will clear D. It takes this long to verify your eligibility for flood insurance B. In some areas flooding takes 2 or more weeks to develop Hurricanes sometimes transform into extra-tropical cyclones. What is the main difference between a hurricane and an extra-tropical cyclone? A. Energy source B. Rotation direction C. Storm depth D. Amount of lightening A. Energy source Which one of the following has caused the highest riverine flood discharge known in the historical or geological record? A. Dam break B. Alluvial fan flooding C. Flooding after a tropical storm crosses land D. Ice Jam Flooding D. Ice Jam Flooding Which of the following are closed basin lakes. Select all that apply. A. Great Salt Lake B. Salton Sea C. Lake Tahoe D. Pyramid Lake A. Great Salt Lake B. Salton Sea D. Pyramid Lake Alluvial fans are special flood hazards because... A. Flow carrying channels can avulse B. High levels of contaminants are common C. Flow channels are subject to extreme meandering? D. of extreme flow capacity of channels. A. Flow carrying channels can avulse Which of the following led to professional engineering licensure in California? A. San Francisco earthquake B. The Los Angeles Aqueduct C. Damage from the Blackhawk Slide D. Collapse of the St. Francis Dam D. Collapse of the St. Francis Dam Which of the following is most effective as an alluvial fan flood mitigation measure? A. Elevating Houses B. Large scale debris basins C. Sandbagging around home D. Flood walls around home B. Large scale debris basins A closed basin lake is a special flood hazard because... A. it can fill unusually quickly B. it is prone to extreme pollution C. it can cause long term flooding D. blockage collapse can cause flash flooding C. it can cause long term flooding Sometimes developers will place fill in the floodplain to raise land above the 100-yr flood elevation so that homes built there will not require flood insurance. What is the impact to natural and beneficial floodplain functions of placing fill in the floodplain? A. It reduces flood damages to homes B. It reduces storage and increases downstream flooding C. It enhances groundwater recharge D. It provides for an increased community tax base B. It reduces storage and increases downstream flooding What is the main reason floodplain managers want to protect natural and beneficial functions of floodplains? A. Letting a floodplain act as a floodplain can prevent deaths and has economic benefits B. Floodplains can be extremely beautiful and make very nice parks C. Floodplains provide enhanced aquatic habitat for many species D. Undeveloped floodplains allow cheaper construction of dams A. Letting a floodplain act as a floodplain can prevent deaths and has economic benefits With regard to flooding, allowing floodplains to do what they were meant to do achieves which one of the following? A. Increased flood damages B. Decreases downstream flooding C. Speeds up the movement of the flood wave D. Reduces the period of flooding B. Decreases downstream flooding How do levees impact the natural and beneficial functions of floodplains? A. They prevent erosion of the floodplains B. They prevent flooding C. They reduce animal waste in rivers D. They separate the flooding from the stream D. They separate the flooding from the stream How do dams impact natural and beneficial functions of floodplains? A. They disrupt lateral vertical and longitudinal transfers of mass and energy B. They enhance evaporation from the surface of impounded lakes C. They provide energy through hydropower D. They improve habitat for all aquatic species A. They disrupt lateral vertical and longitudinal transfers of mass and energy Which of the following are true statements? Select all that apply A. A city always can reduce flooding by straightening channels and lining them with concrete B. Development can cause runoff volume four or more times map from a natural surface C. When the depth of flooding X velocity of floodwaters equals 17 ft^2/s most people will be swept away D. Tornadoes can cause more deaths than floods E. Earthquakes can cause more deaths than floods B. Development can cause runoff volume four or more times map from a natural surface C. When the depth of flooding X velocity of floodwaters equals 17 ft^2/s most people will be swept away What adverse impact does the seawall have on coastal flooding? A. Remove storage for flood water B. Increases erosion beyond the ends of the seawall C. Raises flood elevations for areas not protected by the wall D. There are no adverse impacts B. Increases erosion beyond the ends of the seawall