Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.
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
Upcoming SlideShare
Loading in …5
×

Ecological rainfall infrastructure: investment in trees for sustainable development

822 views

Published on

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

Published in: Environment
  • Be the first to comment

  • Be the first to like this

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…

×