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Land Use Cover Change (LUCC) Modeling
Bryan C. PijanowskiPurdue University
Co-investigators
• David Campbell
• Jennifer Olson
• Nathan Torbick
• Zhen Lei
• Snehal Pithadia
• Konstantinos Alexandridis
Modeling Objectives
1. Quantify land use cover change across the region and within case study sites
2. Understand the nature of the drivers; how they operate over spatial and temporal scales
3. Develop reliable predictions of future change
4. Interface model output to biophysical forcing factors that influence local, regional and global climate change
Land Use Changes in East Africa• In rural areas, seeing a major shift from pastoralist society
to cropping society• Significant migrations toward urban areas (mostly males)• Cropping systems are intensifying and diversifying• Multiple use systems are common (charcoal, cropping,
grazing)• Use is dependent on unpredictable climate, scarce
resources (water, wood for fuel and building)• Large “shocks” to use due to policy change (adjudication,
global trade markets)• Major conflict in use of land for wildlife and cropping
(wildlife damage crops)• Wars and infectious disease effect population dynamics
and migration patterns
Role Playing Games
Expert Judgment
Case Study Data and
Stories
LUCC Data from
Remote Sensing
FO
RM
UL
AT
ION
LTM-Neural net
LTM-MCE
BayesianBelief
Networks
Multi-Agent
Simulations(MABEL)
MO
DE
LS
Expert Judgment
Uncertainty and Risk
Analysis
Model Ensemble Analysis
AS
SE
SS
ME
NT
Performance Analysis
Coupling Qualitative and Quantitative Approaches to Model LUCC
Global
Regional
Country
District
Town
Family/Farm
Individual/Pixel
Homogenous Zones
IPC
C/G
TA
PE
xper
ts/
Dem
ogra
phy
RP
S/C
ase
Stu
dies
SCALE SOURCE
MA
BE
L
LTM
“Bottom up”
“Top down”
Pot
entia
l
Cas
e S
tudi
es
Resolve
Modeling ScalesModeling Scales
LTM Results to Date
Africover-GLC Hybrid Land CoverAfricover-GLC Hybrid Land Cover
Land Cover and Coarse RCM GridLand Cover and Coarse RCM Grid
Land Cover and Both RCM GridsLand Cover and Both RCM Grids
Rainfed Herbaceous CropsRainfed Herbaceous Crops
This is what we are trying to predict locations of across the region
So…..• How well did we do?• Where does the model do poorly? • What are we missing? • What is need to improve the model
performance?• What specific scenarios can we
start to consider?
LTM Results - PreliminaryLTM Results - Preliminary
Areas in green are correctly predictedRed = LTM predicts rainfed but it doesn’t exist (over-predict)Yellow = LTM does not predict rainfed but it exists (under-predict)
Areas in green are correctly predictedRed = LTM predicts rainfed but it doesn’t exist (over-predict)Yellow = LTM does not predict rainfed but it exists (under-predict)
Kilimanjaro
Very good performance
Fair performance
Poor performance
Poor performance
LTM Results - PreliminaryLTM Results - Preliminary
Areas in green are correctly predictedRed = LTM predicts rainfed but it doesn’t exist (over-predict)Yellow = LTM does not predict rainfed but it exists (under-predict)
Areas in green are correctly predictedRed = LTM predicts rainfed but it doesn’t exist (over-predict)Yellow = LTM does not predict rainfed but it exists (under-predict)
LTM Results - PreliminaryLTM Results - Preliminary
Blue indicates 10% increase in this land use class regionally
Blue indicates 10% increase in this land use class regionally
Blue indicates 10% increase in this land use class regionally
Blue indicates 10% increase in this land use class regionally
LTM Results - PreliminaryLTM Results - Preliminary
Relative LTM Performance Metric
MABEL
• Economic and behavioral model of agents that interact in market model
• They calculate their expected utility from causal belief probability model (BBN)
• A statistical learning algorithm is introduced so that agents can adjust their beliefs according to rewards from actions (so they can be adaptive)
• It is multi-tool: Swarm, Netica, SPSS and ArcGIS based
MABEL Framework
Land Agent 1 …
“Market Model” or “Social Interaction Model”
Policy Maker Agent 1
Policy Maker Agent M
…
Land Agent 2 Land Agent N
Interface to MABEL Server for Decision Inference
Agents Grouped into Classes
MABEL Server
Land Partition Routine&
New Agent Creation
Policy Controls
Population of Agents in Each Client Simulation
Intented Decision's Expected Utility
60
65
70
75
80
85
90
95
100
01 2 3 4 5
67
89
1011
1213
1415
16
1718
1920
21
22
23
24
25
2627
2829
3031
32
3334
3536
3738
3940
4142
434445
464748495051525354555657
5859
6061
6263
64
6566
6768
69
7071
7273
7475
76
77
78
79
80
8182
8384
85
8687
8889
9091
9293
9495
96 97 98 99100
Cumulative Reward Value
-300
-200
-100
0
100
200
300
400
500
600
700
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
Case Number
Cu
mu
lativ
e R
ew
ard
Step 0
Prior Probabilities of the FDS Belief Network
(Initial State)
Cumulative Reward Value
-300
-200
-100
0
100
200
300
400
500
600
700
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
Case Number
Cu
mu
lativ
e R
ew
ard
Intented Decision's Expected Utility
60
65
70
75
80
85
90
95
100
01 2 3 4 5
67
89
1011
1213
1415
16
1718
1920
21
22
23
24
25
2627
2829
3031
32
3334
3536
3738
3940
4142
434445
464748495051525354555657
5859
6061
6263
64
6566
6768
69
7071
7273
7475
76
77
78
79
80
8182
8384
85
8687
8889
9091
9293
9495
96 97 98 99100
Step 100
Average Cumulative Rewards & 2nd Order Dynamics
y = 0.0235x2 - 0.0112x - 48.023R2 = 0.9646
-100
-50
0
50
100
150
200
250
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
Case Number
Cum
ula
tive R
ew
ard
s
Average Cumulative Rewards
Poly. (Average Cumulative Rewards)
Losses Period (decreasing rate)
Break-even Period (steady rate)
Gains Period (increasing rate)
Higher Variability (high uncertainty,
slow learning)
Lower Variability (low uncertainty, faster learning)
What is needed with MABEL
• Need to define the social interaction(s) most important for land use change
• We have several candidate agents
• Need to determine a Belief system and general utility function for agents
• Can we collect this information from the group via the internet (we would develop a web-based input tool)