Flood and Floodplains

Question 1

a _____ inundates a floodplain

Answer 1

flood

Question 2

the perennial flooding is partly attributed to its

Answer 2

geographical attributes

Question 3

how many river basins are there in the country

Answer 3

421 principal RB

Question 4

Average number of typhoons in the country every year

Answer 4

20

Question 5

a total of ____ hectare of land nationwide are subject to flooding

Answer 5

1,316,230 ha

Question 6

32% of flooding happens at___

Answer 6

Central Luzon

Question 7

Major categories of flood

Answer 7

1. Riverine flooding
2. Coastal flooding
3. Shallow flooding

Question 8

Flooding that occurs along a channel

Answer 8

Riverine flooding

Question 9

A severe storm that drops much rainfall in a short time can generate ______

Answer 9

Flash flood

Question 10

Erosion changes the shape of channels. On the outside meander the banks are subject to erosion as the water scour against them

Answer 10

Riverine erosion

Question 11

Typhoons and sever storms cause most ______

Answer 11

Coastal flooding

Question 12

Persistent high wind and changes in air pressure push water toward the shore causing a _______

Answer 12

storm surge

Question 13

It occurs in flat areas where a lack of channels means water cannot drain away easily.

Answer 13

Shallow flooding

Question 14

Shallow flood includes______

Answer 14

1. sheet flow
2. ponding
3. urban drainage

Question 15

Special flood hazards are:

Answer 15

1. Closed basin lakes
2. Uncertain flow paths
3. Dam breaks
4. Ice jams
5. Mudflows

Question 16

Human development that has adverse impact on floods and floodplains:

Answer 16

Riverine floodplain
Watersheds
Coasts

Question 17

Main causes of flood damage:

Answer 17

Hydrodynamic forces
Debris impact
Hydrostatic forces
Soaking
Sediment and contaminants