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Ecological	rainfall	infrastructure:	investment	in	
trees	for	sustainable	development	
Ecological	rainfall	infrastructure,	...
Forest	and	water	–	big	picture	on	‘cool	forests’	
Q			=			P				-				E			±		ΔS	
Stream	flow	(blue	
water):	flow	persis-
tence...
Blue water
streamflow
Rainfall triggering
conditions
Precipi-
tation
Rainbow water Atmospheric transport
Soil & ground-wat...
van	der	Ent	RJ,	Savenije	
HHG,	Schaefli	B,	Steele-	
Dunne	SC,	2010.	Origin	
and	fate	of	atmospheric	
moisture	over	
conDnen...
•  Trees	consume	water	
•  Trees	recycle	water	
•  Trees	help	store	water	by	
changing	soil	to	be	
					a	more	effecDve	buff...
Lightning	
BNF	 Denitrifiers	
Long	cycle	rain	
BRG	 ET
Stem-flow
Through
-fall
Rainfall Cloud
interception
Lateral
outflows
(interflow) Recharge
Soil surface
evaporation
Transpi...
Cooling	effect	of	E	
	
Foresters	&	farmers		
managing	tree	cover:	
ET	translated	into	tree,		
crop	and	pasture	
producDvity...
Decarbonizing	the	debate	on	forests,	
trees	and	climate:	cool	trees	
Trees	make	it	cooler	,	
help	with	rainfall	and	
keep	...
Ecological rainfall infrastructure: investment in trees for sustainable development
Ecological rainfall infrastructure: investment in trees for sustainable development
Ecological rainfall infrastructure: investment in trees for sustainable development
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Ecological rainfall infrastructure: investment in trees for sustainable development

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Presentation by Meine van Noordwijk at ICRAF side event on ecological rainfall infrastructure at the Paris COP21

Publicada em: Meio ambiente
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Ecological rainfall infrastructure: investment in trees for sustainable development

  1. 1. Ecological rainfall infrastructure: investment in trees for sustainable development Ecological rainfall infrastructure, Rio Pavillion COP PARIS 02-12-2015 Meine van Noordwijk Chief ScienDst, World Agroforestry Centre (ICRAF); Professor of Agro- forestry, Wageningen University Long cycle: oceans to land Short cycle: Land to land
  2. 2. Forest and water – big picture on ‘cool forests’ Q = P - E ± ΔS Stream flow (blue water): flow persis- tence depends on watershed health, as does water quality PrecipitaDon of ‘rainbow water’: 60% of rainfall over land derives from oceans, 40% from vegetaDon on land EvapotranspiraDon (green water use) leads to air cooling, trees use 100-200 mm/year more than short vegetaDon Soil water storage (‘sponge effect’) depends on soil depth and structure
  3. 3. Blue water streamflow Rainfall triggering conditions Precipi- tation Rainbow water Atmospheric transport Soil & ground-water buffering GreenwaterET evapotranspiration Precipi- tation GreenwaterET evapotranspiration Blue water streamflow Soil & ground-water buffering
  4. 4. van der Ent RJ, Savenije HHG, Schaefli B, Steele- Dunne SC, 2010. Origin and fate of atmospheric moisture over conDnents. Water Resources Research 46, W09525, E/P Pfrom Et/P
  5. 5. •  Trees consume water •  Trees recycle water •  Trees help store water by changing soil to be a more effecDve buffer •  Streamflow from healthy catchments with forests and trees is more gradual Higher evapotranspi- raDon means more cooling effect Higher evapotranspi- raDon means more atmospheric water vapour Prevailing winds BioDc-pump-induced air flows? Oceanic input Biological precipitaDon triggers? Rainfall Downstream water use, livelihoods risks and benefits Scien1- fic debate Downstream and downwind benefits of watershed restoraDon
  6. 6. Lightning BNF Denitrifiers Long cycle rain BRG ET
  7. 7. Stem-flow Through -fall Rainfall Cloud interception Lateral outflows (interflow) Recharge Soil surface evaporation Transpiration Canopy water evaporation Uptake Quick- flow Base flow { Surface run-on Surface Run-off Streams & river Litter layer Sub- surface lateral inflows Infil- tra- tion Percolation Canopy inter- ception
  8. 8. Cooling effect of E Foresters & farmers managing tree cover: ET translated into tree, crop and pasture producDvity New BRG-science Rainbow water closes the hydrological cycle Hydrologists: Q, Blue water implies focus on stream- flow (floods, drought, use as irrigaDon source) Tree ecophy- siologists: Et, Green water implies focus on use of wa- ter by vegeta- Don, compe- Dng with what enters streams Soil scien1sts: ΔS, Sponge effect focus on buffering by soil with good infiltra-Don and deep root systems Landscape ecologists: scaling from patch, via hillslopes to watersheds in relaDon to human land use Climatologists: P, PrecipitaDon (rainfall) sourced from oceans + land, global circulaDon
  9. 9. Decarbonizing the debate on forests, trees and climate: cool trees Trees make it cooler , help with rainfall and keep the soil moist UNFCCC: global climate change depends on greenhouse gas emissions This carbon thing is hard to understand, we can’t see it…

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