Integrated Management and Assessment System

Balancing Food Security, Conservation,
and Ecosystem Integrity in East Africa


Global Livestock Collaborative Research Support Program

US Agency for International Development

This on-line volume is based upon a workbook created for use in workshops held in April 2000 by Randy Boone as part of a training effort under IMAS. The workbook includes many images, and so is presented in sections to ensure file sizes remain reasonable. The sections are in Adobe PDF format, so you will need the free utility Acrobat Reader to view the files. If printed, the sections comprise the entire volume, except for supplimental appendices, with page numbers and space for notes on most pages. References are made to SAVANNA, SMS, and SavView, which are IMAS software tools that may be available and requested from project investigators.

Training Manual
Contents i
IMAS overview 1
Ecosystem modeling in IMAS 7
Savanna 9
Spatial methods 9
Three primary tools used in IMAS ecosystem modeling 10
The Savanna Modeling System 12
The Savanna Modeling System directory structure 14
Savanna's representation of spatial information 16
Savanna's representation of vegetation within a Cell 18
Initializing facets within Savanna 20
Main files controlling spatial modeling in Savanna 22
Simulation control in Savanna 24
Savanna submodels 27
Weather modeling in Savanna 28
Soil modeling in Savanna 30
Light modeling in Savanna 32
Biomass allocation in Savanna 34
Transpiration - net primary production, establishment 36
Vegetation physiology modeling in Savanna 38
Vegetation population modeling in Savanna 40
Initializing woody cover within Savanna 42
Woody plant growth 44
Decomposition and nitrogen mineralization in Savanna 46
Animal energy balance and populations 48
Animal energy use in Savanna 50
Animal populations in Savanna 52
Animal rates of change in Savanna 54
Animal migration in Savanna 56
Animal diets in Savanna 58
Animal habitat suitability and distributions 60
Restricting animal movements in Savanna 62
Distance to water 64
Disease modeling in IMAS - MCF 66
Disease modeling in IMAS - Rinderpest 68
Households and agriculture in Savanna 70
Household-level economics 72
SMS 75
Temporal output from Savanna - 1 76
Temporal output from Savanna - 2 78
Spatial output from Savanna - 1 80
Spatial output from Savanna - 2 82
SavView 85
Parameter Pages 85
Animal populations in SavView 86
Animal rates of change in SavView 88
Households in SavView 90
Agriculture in SavView 92
Rainfall in SavView 94
Simulation values in SavView 96
System information in SavView 98
Maps that do not change in SavView 100
Distance to water in SavView 102
Animal distributions force maps in SavView 104
Values not yet included in SavView 106
Using SavView 109
Explorer style trees in SavView 110
Making selections in trees in SavView 112
Menu items in SavView - File 114
Menu items in SavView - Edit, View 116
Menu items in SavView - View in View 118
Menu items in SavView - Run, Help 120
Buttons on the toolbar in SavView 122
Charts in SavView 124
Maps in SavView 128
Control Model 133
Experiments 141
Experiments - Effects of drought 142
Experiments - Rainfall within years 148
Experiments - More livestock 152
Experiments - More livestock (continued) 156
Experiments - Higher first-year survival 162
Experiments - Increased livestock birth rates 166
Experiments - Improved adult livestock survival 170
Experiments - Reducing effects of disease 174
Experiments - Allowing livestock in the craters 178
Experiments - Removing the threat of livestock theft 182
Experiments - Removed threat of MCF 186
Experiments - Adding or restoring water sources 190
Experiments - Dedicating water sources to lodges 194
Experiments - Households and agriculture 198
Experiments - Households and agriculture (continued) 202
Presenting IMAS 206
Technical matters 206
Presenting Savanna results 208
GL-CRSP-IMAS Project 1999 Annual Report
Ellis and Coughenour (1998)
Beyond 2000 IMAS Web article
Contact Information