blockPollution_Dynamics

Pollution dynamics
Diagram of Pollution_Dynamics

Information

This model describes the appearance of persistent pollutants. These pollutants are an unwelcome yet inevitable byproduct of our industrial production. Especially air pollution is problematic, because these pollutants are difficult to re-capture, and they remain in the air for a long time, somewhere in the order of 100 years. These then lead to Global Warming.

Whereas the earlier WORLD2 model listed only the appearance and assimilation of pollution itself, the newer WORLD3 model accounts for the possibility of reducing the release of pollutants into the air by improved technology using a second state variable. For example, it may be possible to burn coal in a power plant that captures the released CO2 rather than releasing it into the atmosphere. In this way, the greenhouse gas emissions could be significantly reduced, and thereby, the effects of global warming could be mitigated.

Pollutants can take many forms. For this reason, the WORLD3 model normalizes the pollutants and expresses them in "units of pollution." In accordance with engineering practice, normalized quantities are assumed to be dimensionless (the dimensions are filtered out in the process of normalization), and consequently, pollution in this model is assumed dimensionless. The technology change factor is also dimensionless.

Parameters

TypeNameDefaultDescription
Realagr_mtl_toxic_index1Agricultural materials toxicity index
Realassim_half_life_19701.5Pollution assimilation half life in 1970
Realdes_ppoll_index_DPOLX1.2Desired persistent pollution index
Realfr_agr_inp_pers_mtl0.001Effective fraction of agricultural pollution input
Realfrac_res_pers_mtl0.02Effective fraction of resource utilization on pollution generation
Realind_mtl_emiss_fact0.1Industrial materials emission factor
Realind_mtl_toxic_index10.0Industrial materials toxicity index
Realind_out_in_1970790000000000.0Industrial output in 1970
Realp_ppoll_gen_fact_11Default persistent pollution generation factor
Realpers_pollution_init25000000.0Initial persistent pollution
Realppoll_in_1970136000000.0Persistent pollution in 1970
Realppoll_tech_init1Initial persistent pollution technology change factor
Realppoll_trans_del20Persistent pollution transmission delay
Realt_air_poll_time4000Air pollution change time
Realt_policy_year4000Year of policy change
Realtech_dev_del_TDD20Technology development time
Real[:]p_ppoll_tech_chg_mlt{0, 0, 0, 0}Persistent pollution technology change multiplier

Connectors

TypeNameDefaultDescription
SystemDynamics.Interfaces.MassInPortpopulationPopulation
SystemDynamics.Interfaces.MassInPortpc_res_use_mltPer capita resource utilization
SystemDynamics.Interfaces.MassInPortarable_landArable land
SystemDynamics.Interfaces.MassInPortagr_inp_per_hectAgricultural investments per hectare
SystemDynamics.Interfaces.MassOutPortppoll_tech_mult_icor_COPMTechnology induced reduction in persistent pollution release
SystemDynamics.Interfaces.MassOutPortppoll_indexPersistent pollution index
SystemDynamics.Interfaces.MassOutPortppoll_gen_rtPersistent pollution generation rate
SystemDynamics.Interfaces.MassInPortindustrial_outputAnnual industrial output
SystemDynamics.Interfaces.MassOutPortpoll_intens_indPersistent pollution intensity index
SystemDynamics.Interfaces.MassOutPorts_yield_mlt_air_pollLand yield multiplier to air pollution release

Components

TypeNameDefaultDescription
SystemDynamics.Levels.LevelPers_Pollutionp.440 of Dynamics of Growth in a Finite World
SystemDynamics.Rates.RRatePPoll_Appear_Rtp.435 of Dynamics of Growth in a Finite World
SystemDynamics.Rates.RRatePPoll_Assim_Rtp.442 of Dynamics of Growth in a Finite World
SystemDynamics.Sources.SourceSource1
SystemDynamics.Sources.SinkSink1
SystemDynamics.Functions.SMTH3PPoll_Appear_Ratep.435 of Dynamics of Growth in a Finite World
SystemDynamics.WorldDynamics.World3.Utilities.PPoll_Assim_RtPPoll_Ass_Rtp.442 of Dynamics of Growth in a Finite World
SystemDynamics.Functions.TabularAssim_Half_Life_Mltp.453 of Dynamics of Growth in a Finite World
Modelica.Blocks.Math.GainPPoll_Indexp.441 of Dynamics of Growth in a Finite World
SystemDynamics.WorldDynamics.World3.Utilities.PPoll_Gen_RtPPoll_Gen_Rtp.428 of Dynamics of Growth in a Finite World
SystemDynamics.WorldDynamics.World3.Utilities.PPoll_Gen_AgrPPoll_Gen_Agrp.433 of Dynamics of Growth in a Finite World
SystemDynamics.WorldDynamics.World3.Utilities.PPoll_Gen_IndPPoll_Gen_Indp.429 of Dynamics of Growth in a Finite World
SystemDynamics.Levels.Level1aPPoll_Tech_PTD
SystemDynamics.Rates.Rate_1PPoll_Tech_Chg_Rt
SystemDynamics.Sources.SourceSource2
SystemDynamics.WorldDynamics.World3.Utilities.PPoll_Tech_Chg_RtPPoll_Tech_Ch_Rt
SystemDynamics.Functions.TabularP_PPoll_Tech_Chg_mlt_POLGFM
SystemDynamics.WorldDynamics.World3.Utilities.P_PPoll_Tech_ChgP_PPoll_Tech_Chg
SystemDynamics.Functions.SMTH3P_PPoll_Gen_Fact_2
SystemDynamics.WorldDynamics.World3.Utilities.S_PPoll_Gen_FactS_PPoll_Gen_Factp.428 of Dynamics of Growth in a Finite World
SystemDynamics.Functions.TabularPPoll_Tech_Mult_Icor_COPM
SystemDynamics.WorldDynamics.World3.Utilities.Poll_Intens_IndPoll_Intens_Ind
Modelica.Blocks.Math.GainGain1
SystemDynamics.Functions.TabularP_Yield_Mlt_Air_Poll_1p.310 of Dynamics of Growth in a Finite World
SystemDynamics.Functions.TabularP_Yield_Mlt_Air_Poll_2p.310 of Dynamics of Growth in a Finite World
SystemDynamics.WorldDynamics.World3.Utilities.S_Yield_Mlt_Air_PollS_Yield_Mlt_Air_Pollp.310 of Dynamics of Growth in a Finite World
Modelica.Blocks.Math.GainAssim_Half_Lifep.453 of Dynamics of Growth in a Finite World