Surface Runoff and Subsurface Drainage Flashcards
1
Q
Parameter vs State: Parameter
A
porosity; capability
2
Q
Parameter vs State: State
A
current %; right now
3
Q
Factors that Greatly effect runoff
A
precip type, duration, total amount, intensity, temporal and spatial variations
4
Q
Precipitation Type
A
rain, snow, hail
5
Q
Duration of Event
A
1 day, 2 hours, 30 minutes (time)
6
Q
Total Amount
A
0.2 in, 0.5 in, 2 in = 2.7 in
7
Q
Intensity
A
4 in over 1 day or 6 hr?
8
Q
Temporal Variations
A
fluctuation in ecosystem structure that effects rainfall
9
Q
Spatial Variations
A
rainfall intensity differences over an area
10
Q
IDF: Intensity
A
depth per time
11
Q
IDF: Duration
A
time
12
Q
IDF: Frequency
A
how common
13
Q
100 year/1 hr event for JC (1961)
A
2.5”
14
Q
PA IDF Characteristics
A
Appalachian Mountains and Lake Erie
15
Q
Frequency Def
A
return period/probabilitiy
