GEOG 1266 Lecture Notes - Lecture 8: Sustainable Organic Integrated Livelihoods, Rill, Tillage
13 Jun 2018
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SOIL EROSION
Hydrologic cycle
Total Water on Earth:
1,400,000,000 Cubic kilometers
Location of Water
%
Cubic Kilometers
Oceans
97.2
1,321,00,000
Ice
2.15
29,176,000
Groundwater
0.62
8,336,000
Lakes
0.017
229,000
Soil
0.005
66,000
Atmosphere
0.001
12,920
Rivers
0.0001
1,250
1. PRECIPITATION
a. Average Annual Precipitation (MAP)
b. Intensity – how hard its raining
A B
mm
Hr
Total = 24 mm Total= 24mm
Intensity = 1mm/hr Intensity = 12mm/hr
2. INTERCEPTION P
P- precip
C – canopy interception C
T – through flow
S – Stem flow
L – litter interception S T L
F – Infiltration R
R-runoff
F
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