Landscape agronomyat the watershed scale

IALE 2013 European Congress

Changing European Landscapes

Manchester 9 September 2013

Symposia I

Land system

change impacts on

European landscapes

RIZZO • LAZRAK • BENOITINRA SAD-ASTER • Mirecourt (FR)

1bibliography at http://bit.ly/IALE2013

D. RIZZO et al. | Landscape agronomy at the watershed scaleIALE 2013 • Symposium 1 “Land system change impacts on European landscapes” Manchester 09/09/2013

biblio at bit.ly/IALE2013

A landscape agronomy perspective

• landscape agronomy conceptual model adapted from Benoit, Rizzo et al. 2012

[LP] temporal and spatialconfigurations

[FP] of agricultural land uses

[NR] within their context inrelation to water quality

* on land system architecture cf. Turner II et al., 2013

hierarchical approachto support watershedmanagers at dealingwith LUCC

to address land system architecture* at the watershed level

AIM

.02

D. RIZZO et al. | Landscape agronomy at the watershed scaleIALE 2013 • Symposium 1 “Land system change impacts on European landscapes” Manchester 09/09/2013

biblio at bit.ly/IALE2013

Hierarchical approach

stream order cf. Strahler 1957

aggregationof the PWs

Primary Watershed

segmentationof the PW

new spatial units combiningPW & agricultural dynamics

new spatial units combiningagricultural dynamics within the PW

bigger Strahler order

Strahler sub-order

defined by spatial configuration of agricultural LU & natural resources

landscape patterns

.03

D. RIZZO et al. | Landscape agronomy at the watershed scaleIALE 2013 • Symposium 1 “Land system change impacts on European landscapes” Manchester 09/09/2013

biblio at bit.ly/IALE2013

Material & Methods

• Land use stratified samplingTerUti points for 90 land use classes for the period 1981-2010

• land use return times5 years temporal sliding window on 11 land use groups

•Prim. Waters. clusteringHierarchical clus. on Principal Comp. (FactoMiner, Housson et al., 2012)

•maps of homogeneous LU sequence dynamics

• series of satellite imagesmaps of 6 land cover classes for the period 1997-2008

• adjacent pixel with similarLC sequences

• temporo-spatial segmentationHidden Markov Model within the PW (Arpentage, Mari et al., 2013)

• synchronic image of land cover changes

aggregation • predefined spatial units segmentation • custom groups of pixels

.04

D. RIZZO et al. | Landscape agronomy at the watershed scaleIALE 2013 • Symposium 1 “Land system change impacts on European landscapes” Manchester 09/09/2013

biblio at bit.ly/IALE2013

Aggregation (Meuse and Moselle)

stable

unstable(barley, mixed, semi-natural)

barley ‘80 rapeseed-

wheat

mixed farming

crops ‘80

semi-natural

stable

.05

16 PWs (~24k Km2)11 land use groups, 1981-2010

6 clusters with

2 major dynamics

intensification

extensification

D. RIZZO et al. | Landscape agronomy at the watershed scaleIALE 2013 • Symposium 1 “Land system change impacts on European landscapes” Manchester 09/09/2013

biblio at bit.ly/IALE2013

Segmentation (Yar primary watershed)

.06

1 PW (~60Km2)6 land cover classesyears 1997-2008

5 groups of pixelswith 1 gathering cropdynamics

Corgne, 2004Lazrak 2012, PhD ThesisMari et al., 2013 Arpentage

D. RIZZO et al. | Landscape agronomy at the watershed scaleIALE 2013 • Symposium 1 “Land system change impacts on European landscapes” Manchester 09/09/2013

biblio at bit.ly/IALE2013

Conclusions

Focussing on temporo-spatial dynamics of (agricultural) land use for natural

resource spatial units (watershed) can enhance the understanding of the

land system architecture

aggregation • predefined spatial units

segmentation • custom groups of pixels

Reinterpreting watershed hierarchy on

homogenous land management units can help match action spaces of relevant managers and coordinating

landscape level decision-making

Rizzo et al., 2013 Farming systems designing landscapesDanish Journal of Geography (under review)

(take-home message)

.07

D. RIZZO et al. | Landscape agronomy at the watershed scaleIALE 2013 • Symposium 1 “Land system change impacts on European landscapes” Manchester 09/09/2013

biblio at bit.ly/IALE2013

Thank you for the attention !

.08

• bibliography at bit.ly/IALE2013

Davide RIZZOINRA SAD-ASTER Mirecourt (FR)

• e-mail ridavide@gmail.com• twitter @pievarino• website bit.ly/RizzoD

any question?