NetLogo水模型中Logging与Salinity变量指数增长问题求助

我正在开发一个NetLogo水模型，核心逻辑是：每次农民完成用水操作后，Logging和Salinity两个变量会被更新。模型中设置了不同类型的农民，他们分别使用地表水或地下水，这些用水行为会引发Logging和Salinity相关的问题。

目前遇到的关键问题是：随着tick推进，Logging和Salinity会从初始极小值飙升至指数级的大数值，我希望能在200个tick内将这两个变量的数值控制在10以内。

模型界面 #

模型代码 #

globals [TW well-depth ] 
Breed [farmers farmer] 
farmers-own [ WA SW FW WR WD dws Logging salinity benefit-out] 
patches-own [GW wtd ] ;water table depth and Groundwater 

to setup
  clear-all
  setup-farmers
  ask patches [ 
    ifelse random 3 = 0 [ 
      set WTD depth-WT + random-float 1 
      set GW Ground-water + random-float 5.005 + (100 / wtd) 
      set pcolor blue 
    ] [ 
      set WTD depth-WT + 5 + random-float 5 
      set GW Ground-water + random-float 5.005 + (100 / wtd) 
      set pcolor red
    ] 
  ] 
  reset-ticks 
end 

to setup-farmers 
  create-farmers num-farmers [
    move-to one-of patches 
    set shape "person" 
    set sw surface-water + random 100.0 
    set dws random 100 + distance-from-water-source 
    SET WA (sw / dws) + sum [gw] of patches in-radius 1 
    set logging 0.005 * dws + 0.5 * wtd 
    set salinity .05 * dws + 0.5 * wtd 
    set wd minwater-req + random-float 6.5 
    set benefit-out 0 
    ask patches in-radius 1 [set pcolor green] 
    set color Brown 
    if WTD = 0 [stop] 
  ] 
end 

to go 
  ask farmers [ 
    watering-decisions 
    update-water 
  ] 
  tick 
end 

to watering-decisions 
  if watering-decision = "zero-intelligence" [ 
    ifelse SW > WD [
      use-sw 
      set-wtd 
      set logging logging + logging / wtd 
      Set salinity salinity + salinity + 0.5 * wtd 
      Set benefit-out benefit-out + 100 / (logging + salinity) 
    ] [ 
      ifelse (sw > 0.6 * WD) and (sw < 0.75 * WD) [
        ifelse random 3 = 1 [
          use-Gw 
          set wtd wtd + .01 + random-float 0.005 
          set logging logging + logging / wtd 
          set salinity salinity + 5 * (salinity / wtd) ; scale up values 0.5*10, 0.005* 10 
          set benefit-out benefit-out + 100 / (logging + salinity) 
        ] [
          Use-sw 
          set wtd wtd + ( 0.01 + random-float 0.0005) 
          set logging logging + logging / wtd 
          Set salinity salinity + salinity + 0.5 * wtd 
          Set benefit-out benefit-out + 100 / (logging + salinity)
        ]
      ] [
        ifelse (SW >= 0.5 * WD) and (sw <= 0.6 * WD) [
          ifelse random 1 = 0 [
            use-Gw 
            set wtd wtd - .01 + random-float 0.05 
            set logging logging + logging / wtd 
            Set salinity salinity + 5 * (salinity / wtd) 
            Set benefit-out benefit-out + 100 / 1.5 * (logging + salinity) 
          ] [
            use-sw 
            set wtd wtd + .01 + random-float 0.005 
            set logging logging + logging / wtd 
            set salinity salinity + 5 * (salinity / wtd) 
            set benefit-out benefit-out + 100 / (logging + salinity)
          ]
        ] [
          ifelse (SW >= 0.25 * WD) and (sw <= 0.3 * WD) [ 
            ifelse random 3 = 1[
              use-sw 
              set wtd wtd + .001 + random-float 0.005 
              set logging logging + logging / wtd 
              set salinity salinity + 5 * (salinity / wtd) 
              set benefit-out benefit-out + 100 / (logging + salinity)
            ] [
              use-Gw 
              set wtd wtd - .1 + random-float 0.005 
              set logging logging + logging / wtd 
              set salinity salinity + 5 * (salinity / wtd) 
              Set benefit-out benefit-out + 100 / (logging + salinity) 
            ]
          ] [ 
            if sw = 0 [
              use-gw 
              set wtd wtd - 0.5 + random-float 0.005 
              set logging logging + logging / wtd 
              set salinity salinity + 0.5 * (salinity / wtd) 
              Set benefit-out benefit-out + 100 / (logging + salinity) 
            ]
          ]
        ]
      ]
    ]
  ]
end 

to use-GW 
  set gw gw - random-float 1 
end 

to use-SW 
  set sw sw - random-float 1 
end 

to Update-water 
end 

to set-wtd 
  set wtd wtd + ( 0.01 + random-float 0.005) 
  ask patches in-radius 1 [ set wtd [wtd] of myself] 
end 

内容的提问来源于stack exchange，提问作者Sadaf