Wood product institution

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Lutfy_abdulah Lutfy Abdulah (Author)

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Masalah Model?

Pembangunan hutan rakyat bertujuan untuk memenuhi permintaan kayu domestik maupun regional. Setiap lahan yang dibangun membutuhkan biaya dan oleh karena itu, ada harapan keuntungan atas biaya yang dikorbankan. Semakin tinggi harga kayu terhadap nilai harapan maka pembangunan hutan rakyat akan terus berlangsung. dan sebaliknya. Pasar kayu ditentukan oleh banyak agen industri pengolahan kayu. Harga jual kayu akan terkoreksi bila ada kompetitot pasar seperti baja ringan. Tingginya permintaan pasar baja ringan mengakibatkan harga kayu merosot dan berada dibawah nilai harapan keuntungan. Akibatnya petani hutan rakyat tidak ingin menggunakan lahannya untuk pohon dan mengonversi untuk peruntukan lain seperti permukiman, kebun dan bahkan menelantarkan lahan tersebut. Bila pemerintah tidak mengambil tindakan maka harapan partisipasi akan semakin menurun. Untuk itu, pemerintah harus mengendalikan harga kayu di atas nilai harapan

Bagaimana model ini bekerja

-. Petani akan menanam pohon di lahan yang peruntukkannya untuk hutan, dengan biaya tertentu sehingga memiliki nilai harapan atas keuntungan tersebut. keinginan untuk menanam akan menurun bila harga kayu turun di bawah ambang batas harapan. petani akan mengonversi lahan untuk peruntukkan lain.

-. Industri akan membeli kayu rakyat. Bila ketersediaan hutan rakyat makin menurun maka bisnis kayu rakyat akan melemah. Hal ini disebabkan oleh kompetitor hasil industri kayu yang lebih awet, murah dan mudah untuk diperoleh serta diterima konsumen.

-. Agen pedagang baja ringan. Memainkan pasar dengan produk dan harga yang relatif murah.

-. Pemerintah bertanggung jawab untuk mengendalikan mekanisme pasar sehingga harga kayu tidak terjun bebas.

Bagaimana menjalankan model ini?

-. Setting jumlah petani dan industri, serta switch-off pasar-baja dan pasar kayu. -. Seting harga kayu > LE kayu. Klik setup dan kemudian klik GO -. Switch-on pasar kayu dan go -. Switch-off pasar baja. Go -. Bila harga kayu < lev maka deforestasi. -. Swotchon kebijakan? agar ada peran pemerintah. Klik Go

Hal yang harus dicatat

harga kayu dan lEV. Perhatikan koreksi harga kayu yang terjadi

THINGS TO TRY

Ubahlah harga kayu, LEV dan swith kebijakan serta pasar baja

Perluasan model

Ubahlah konstanta pengurangan harga kayu akibat pasar baja ringan

CREDITS AND REFERENCES

Prey and preador dari Uri Wilensky

Comments and Questions

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globals [ hutan non-hutan deforestasi max-petani max-industri max-kayu]
breed [petani a-petani]
breed [baja a-baja]
breed [industri a-industri]
breed [kayu a-kayu]
breed [KLHK a-klhk]

turtles-own [energy]
patches-own [countdown]

to setup
  clear-all
  set hutan count patches with [pcolor = green]
  set non-hutan count patches with [pcolor = yellow]
  set non-hutan count patches with [pcolor = red]
  reset-ticks
  lahan
  petani-hr
  jual-kayu
  industri-kayu
  populasi-kayu
  kayu-hr
pemerintah
end 

to go
  move
  if  hutan < 0 [stop]
 if Wood_market? [
    ask petani [
      konversi-lahan
      bangun-hutan
      dampak-baja
      populasi-kayu
      perbaikan-lev
      kartel
    ]
                        ]
     ask industri [
      tumbuh-industri
          ]

if Base_price_policy? [
    ask KLHK [
      mengendalikan-harga-kayu
    bangun-hutan
    ]
    if Wood-price < Forest-cost [
      ask klhk [
        set Wood-price Wood-price > Forest-cost - 1 / Forest_growth_time ]
    ]
     ]
  set hutan count patches with [pcolor = green]
  set non-hutan count patches with [pcolor = yellow ]
  set deforestasi count patches with [pcolor = red]
  tick
end 

to lahan
  ask patches [
      set pcolor one-of [ green yellow ]
      if-else pcolor = green
        [ set countdown Forest_growth_time ]
        [ set countdown random Forest_growth_time ]
          ]
end 

to petani-hr
   set max-petani 100
  set-default-shape petani "person"
  create-petani Number_initial_farmers
  [
    set color 10 + 2
    set size 1.5  ; easier to see
    set label-color red - 2
    setxy random-xcor random-ycor
  ]
end 

to industri-kayu
   set max-industri 50
  set-default-shape industri "building store"
  create-industri Number_initial_industry
  [
    set color 100 + 2
    set size 1.5  ; easier to see
    set label-color red - 2
    setxy random-xcor random-ycor
  ]
end 

to move
  ask petani [
    right random 180
    forward 1
  set energy energy - 2]
end 

to jual-kayu
  if Wood_market? [
    set Wood-price Wood-price + 0.001
    set Wood-price Wood-price - 0.01]
end 

to konversi-lahan
  if Wood-price < Forest-cost [
    if pcolor = green [
      set pcolor red]
   ]
end 

to bangun-hutan
  if Wood-price > Forest-cost [
    if pcolor = red [
      set pcolor green]]
end 

to dampak-baja
  if Light_steel_market? [
    set Wood-price Wood-price - 0.0000001]
end 

to kayu-hr
  ask kayu [
    set max-kayu wood-population ]
end 

to populasi-kayu
  if Forest-cost > Wood-price [
    set wood-population wood-population + 0.01
    set wood-population wood-population - 0.01
  ]
end 

to tumbuh-industri
  if Wood_market? [
  ask industri [
    hatch 0.1 [ rt random-float 360 fd 1 ]
     set energy energy + 2
     ]
  ]
end 

to tumbuh-petani
  if Wood_market? [
    if Wood-price > Forest-cost [
      ask petani [
        hatch 0.1 [ rt random-float 360 fd 1 ]
      ]

    ]
  ]
end 

to mengendalikan-harga-kayu
  if Wood-price <  Forest-cost [
    set Wood-price 0.7
  ]
end 

to perbaikan-LEV
  if Base_price_policy? [
    set Forest-cost Forest-cost + ( 1 / ((1000000 * Forest_growth_time ) + Number_initial_industry ))
    if Wood-price < Forest-cost [
      set Forest-cost Forest-cost - ( 1 / ((1000000 * Forest_growth_time ) + Number_initial_industry ))

  ]
  ]
end 

to pemerintah
   set-default-shape KLHK "person police"
  create-klhk 1
  [
    set color 93 + 2
    set size 3  ; easier to see
    set label-color green - 2
    setxy random-xcor -2
  ]
end 

to kartel
  if  Trade_cartel? [
    set Wood-price Wood-price + (Forest-cost - Wood-price) + 0.01
    create-links-to other petani
    ask out-link-neighbors [ set color white ]
    create-links-to other industri
    ask out-link-neighbors [ set color blue ]
  ]
end 

There is only one version of this model, created about 8 years ago by Lutfy Abdulah.

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