WHAT KEEPS PLANTS GROWING, RIVERS FLOWING? – AND WHERE POLLUTION MOVES! Pieter le Roux...
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WHAT KEEPS PLANTS GROWING, RIVERS FLOWING? – AND WHERE POLLUTION MOVES! Pieter le Roux Hydroprdology Khuluma Sizwe Series
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Transcript of WHAT KEEPS PLANTS GROWING, RIVERS FLOWING? – AND WHERE POLLUTION MOVES! Pieter le Roux...
WHAT KEEPS PLANTS GROWING, RIVERS FLOWING?
–
AND WHERE POLLUTION MOVES!
Pieter le Roux
HydroprdologyKhuluma Sizwe Series
HYDROPEDOLOGY- 60+ WORK YEARS
Conceptualisation• Simon Lorentz – process hydrology• Malcolm Hensley – soils are different
Quantification & modeling• Cornie van Huyssteen – soil morphology / drainable
water• Johan van Tol – hydrology of soil types, hillslopes• Bataung Kuenene – true for a catchment• Carl Freeze – confirmed the role of soils and hillslopes• Darren Bouwer – ancient, recent & current indicators• Martin Tinnefeld – possible in arid zones• George van Zijl – extrapolate it (affordable)
SOIL TYPES: RELIABLE INDICATORS• Control
– Hydrology– Vegetation
• Water supply• Fertility
• Leave signatures– Reliable, available
CAMEL THORN TREE ON DEEP SAND INTERFLOW SOIL(>2M DEEP
AVALONPINEDENE
BAINSVLEI)
Substrates of ecosystems
C B
E
DA
F
G
H
K
J I
CONCEPTUAL MODELOrthic A
re
un
gh
ne
gs
Flow Pathsot
Bedrock
CONCEPTUAL MODELOrthic A
re
un
gh
ne
gs
Flow Pathsot
Bedrock
SeasonsMonths
Weeks
Orthic A
re
un
gh
ne
gs
Flow Pathsot
Bedrock
POLLUTANTS?
Residence time (halve live)pH bufferBiodegradableCharge +/--
0 100 200 300 400 500 6000
100
200
300
400
500
600
700
NO3NH4
mg kg-1
Dept
h in
mm
0 100 200 300 400 500 6000
100
200
300
400
500
600
700
NO3NH4
mg kg-1
Dept
h in
mm
PEDOLOGY
Thinking Outside the Pit. . .
A Canadian Ecologist’s Perspective
Life, Pedology, The Universe and Everything – The Importance of Soil
• The main environmental issues currently facing the globe are soil dependant or soil mediated– Soil quality, sustainability and global food supply– Carbon dynamics and global climate change– Water quality and supply
Tool development• Provides the basis for Landscape and Site Level Management guides– Site hazards and best practices• Links to:– Productivity– Wetlands Definition, Delineation and Evaluation– Habitat (generally and species at risk)– Environmental assessment
Survey Crew with Original Ecological Soil Moisture Regime Concepts
