# Tsunami evacuation

Model was written in NetLogo 5.0.5
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turtles-own [group speed cooperation initSpeed flight EP_knowledge chosenEP direction rescue_attempt initXcor initYcor newInformation my_EP] patches-own [EvacuationPoint] globals [saved cooperativeCitizen safeSpot time10 time30 time50 time80 time95 time_final survivors tempXcor tempYcor meanXcor10 meanYcor10 meanXcor30 meanYcor30 meanXcor50 meanYcor50 meanXcor80 meanYcor80 meanXcor95 meanYcor95 meanXcor_final meanYcor_final stdXcor10 stdYcor10 stdXcor30 stdYcor30 stdXcor50 stdYcor50 stdXcor80 stdYcor80 stdXcor95 stdYcor95 stdXcor_final stdYcor_final coo10 coo30 coo50 coo80 coo95 coo_final] ;;Environment setup to mapa ca import-pcolors "map.png" crt citizens [set color black setxy random-xcor random-ycor set group random group_count set speed (random-normal 0.14 0.015) * 5 set initSpeed speed set EP_knowledge random-poisson av_EP_knowledge set my_EP patch 100 -100 set newInformation 0 set direction heading ] ask turtles [ move-to one-of patches with [pcolor = 67.4 and not any? other turtles-here] ] ask n-of (count turtles * cooperative_citizens / 100) turtles [set cooperation true] let safePlace (list (patch -80 38) (patch -63 33) (patch -62 62) (patch -30 77) (patch -7 86) (patch 5 52) (patch 17 45) (patch 30 51) (patch 60 57) (patch 78 20)) foreach safePlace [ask ?[set pcolor white set EvacuationPoint 1]] set safeSpot patches with [EvacuationPoint = 1] ;;main street, business center where should be more people than in other places ask n-of (count turtles * 0.4) turtles [ move-to one-of patches with [pcolor = 67.4 and distance patch -18 5 < 35 and not any? other turtles-here] ] ask turtles [set initXcor xcor set initYcor ycor ] reset-ticks end ;;Main loop to go ask turtles [ look_for_a_safe_spot form_a_group run_away rescue go_arround move stop_here die_here ] ifelse saved >= citizens * 0.1 and time10 = 0 [set time10 ticks * 5 if length tempXcor >= 2 [set meanXcor10 mean tempXcor set meanYcor10 mean tempYcor set stdXcor10 standard-deviation tempXcor set stdYcor10 standard-deviation tempYcor] set coo10 cooperativeCitizen / saved * 100 set tempXcor (list) set tempYcor (list) ] [ifelse saved >= citizens * 0.3 and time30 = 0 [set time30 ticks * 5 if length tempXcor >= 2 [set meanXcor30 mean tempXcor set meanYcor30 mean tempYcor set stdXcor30 standard-deviation tempXcor set stdYcor30 standard-deviation tempYcor] set coo30 cooperativeCitizen / saved * 100 set tempXcor (list) set tempYcor (list)] [ifelse saved >= citizens * 0.5 and time50 = 0 [set time50 ticks * 5 if length tempXcor >= 2 [set meanXcor50 mean tempXcor set meanYcor50 mean tempYcor set stdXcor50 standard-deviation tempXcor set stdYcor50 standard-deviation tempYcor] set coo50 cooperativeCitizen / saved * 100 set tempXcor (list) set tempYcor (list)] [ifelse saved >= citizens * 0.8 and time80 = 0 [set time80 ticks * 5 if length tempXcor >= 2 [set meanXcor80 mean tempXcor set meanYcor80 mean tempYcor set stdXcor80 standard-deviation tempXcor set stdYcor80 standard-deviation tempYcor] set coo80 cooperativeCitizen / saved * 100 set tempXcor (list) set tempYcor (list)] [ifelse saved >= citizens * 0.95 and time95 = 0 [set time95 ticks * 5 if length tempXcor >= 2 [set meanXcor95 mean tempXcor set meanYcor95 mean tempYcor set stdXcor95 standard-deviation tempXcor set stdYcor95 standard-deviation tempYcor] set coo95 cooperativeCitizen / saved * 100 set tempXcor (list) set tempYcor (list)] [if count turtles = 0 [set time_final ticks * 5 if length tempXcor >= 2 [set meanXcor_final mean tempXcor set meanYcor_final mean tempYcor set stdXcor_final standard-deviation tempXcor set stdYcor_final standard-deviation tempYcor] set coo_final cooperativeCitizen / saved * 100 set survivors saved / citizens * 100 stop] ] ] ] ] ] tsunami tick end ;; Agents look fot the closest one of the evacuation points that they know to look_for_a_safe_spot set heading direction ;let my_EP one-of patches in-cone 400 1 with [EvacuationPoint = 1] let my_safeSpot min-one-of n-of EP_knowledge safeSpot [distance myself] let other_one one-of other turtles in-cone (radius / 10) 360 if (my_safeSpot != nobody and flight = 0 and chosenEP = 0) or ( my_safeSpot != nobody and newInformation = 1 and distance my_safeSpot < distance my_EP) [face my_safeSpot set chosenEP 1 set my_EP my_safeSpot set newInformation 0 set direction heading] if EP_knowledge = 0 and other_one != nobody and not any? other turtles-here [face other_one set direction [heading] of other_one] end ;; Agents may try to form groups. In this case they obtain knowledge about EP locations from the best ;; informed gropu member to form_a_group if (cooperation = true) and (count other turtles in-cone 1 360) < min_group_members and [pcolor] of patch-here > 64 [let groupCenter max-one-of other turtles in-cone (radius / 10) 120 [count other turtles in-cone 1 360] let my_knowledge EP_knowledge if groupCenter != nobody and [cooperation] of groupCenter = true [face groupCenter ask groupCenter [set color blue set speed mean [speed] of turtles in-cone 1 360 let max_knowledge max-one-of turtles in-cone 1 360 [EP_knowledge] if my_knowledge < [EP_knowledge] of max_knowledge [set EP_knowledge [EP_knowledge] of max_knowledge set newInformation 1] ] ] ] end to run_away let dryPatch one-of patches in-cone 1 360 with [pcolor < 75] ifelse one-of patches in-cone 1 360 != nobody and [pcolor] of one-of patches in-cone 3 120 = 95.1 and dryPatch != nobody [ face dryPatch set flight 1 set speed speed + 0.2 ] [set flight 0] end ;; Agents may try to rescue other ones that are related with them (relation is determined by group number difference) to rescue let my_direction direction lt 180 let my_group group let my_knowledge EP_knowledge let my_speed speed let friend one-of turtles in-cone 1.5 180 with [abs(group - my_group) < max_group_diff and (distance myself > 0.6)] ifelse friend != nobody and [rescue_attempt] of friend = 0 [face friend set color pink ifelse [EP_knowledge] of friend > my_knowledge [set EP_knowledge [EP_knowledge] of friend set newInformation 1] [ask friend [set EP_knowledge my_knowledge] set rescue_attempt 1 set direction my_direction set newInformation 1 ] ifelse [speed] of friend > my_speed [set speed [speed] of friend] [ask friend [set speed my_speed]] ] [rt 180 set color black] end ;; Agents turn around when they reach inacessible terrain to go_arround if (patch-ahead 2 != nobody and [pcolor] of patch-ahead 2 = 74.4) or patch-ahead 2 = nobody [lt 180 set direction heading] end to move fd speed end to stop_here if [pcolor] of patch-here < 27 [set saved saved + 1 if cooperation = true [set cooperativeCitizen cooperativeCitizen + 1] ifelse not is-list? tempXcor or empty? tempXcor [set tempXcor (list initXcor) set tempYcor (list initYcor)] [set tempXcor lput initXcor tempXcor set tempYcor lput initYcor tempYcor] die] end to die_here if [pcolor] of patch-here = 95.1 [die] end to tsunami if ticks > 180 [ask patches with [pcolor = 95.1] [ask patches in-radius 3.5 with [pcolor > 64] [set pcolor 95.1] ] ] if (count patches with [pcolor > 64 and pcolor < 70]) = 0 and random-float 0.9 < 0.3 [ask patches with [pcolor = 95.1] [ask neighbors with [pcolor > 40] [set pcolor 95.1] ] ] end

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## Attached files

File | Type | Description | Last updated | |
---|---|---|---|---|

map.png | png | model world | about 10 years ago, by Adam Slucki | Download |

Tsunami evacuation.png | preview | Preview for 'Tsunami evacuation' | about 10 years ago, by Adam Slucki | Download |

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