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Wesman Endom
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FAKTOR KOREKSI VOLUME DOLOK YANG DIUKUR DI SUNGAI (LOGPOND) (Correction factor of logs volume meaured in logpond) Wesman Endom; Sukanda Sukanda
Jurnal Penelitian Hasil Hutan Vol 11, No 4 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1993.11.4.163-167

Abstract

Measuring the volume of logs which have been rafted on the rivers is very difficult. The difficulty is mostly in measuring the average top and bottom diameters of logs because the largest portion of logs are inside the water.In this paper, the results of measurements carried out both on the ground and in the river are described. Lately, log measurement in the river is necessary because:a. Volume of logs sent to industries would be measured in the river.b. Many logs of the illegal cutting found are rafted in the river.The observation reveals that :1. Volumes of logs measured on the ground and in the river are significantly different.2. From the sample of 60 logs of Dryobalanops spp. it is found that the total volume measured on the ground is 273,18 m3, while the total volume measured in the river is 262, 76 m3. The total difference is 10,42 m3 or 0,04 m3 per_m3 in average.3. the correction factor (FK) then is 0,04 m3 per m3 or 3,81 %. It means that the volume of log measured in the river is smaller than the volume Measured on the ground. Therefore, the volume measured in the river should be multiplied with the correction factor of 1.04 to obtain the real volume as measured on the ground.
KAJJAN PEMANENAN TERHADAP KERAPATAN TEGAKAN DI BAGIAN HUTAN ALAM TROPIS PROPINSI LAMPUNG Wesman Endom; Ishak Sumantri
Jurnal Penelitian Hasil Hutan Vol 9, No 6 (1991): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1991.9.6.219-228

Abstract

This  paper  studied  the  logging  impact  on forest  density  in  a forest  concession   in  Province  of  Lampung,   38 sample  plots  were taken consisting  of  22 plots  located  in  virgin/not  yet logged  and  16 located  in logged  over  area.  The  result show  that :1.The  initial potential   of  forest  area  can  be  classified  as moderate,   with  composition   of  commercial   wood  of  Dipterocarpaceae   43.9%, 14.4%  Non  Dipterocarpaceae   and  the rest 41.3%  of  non  commercial   species.  The  average  volume  of  commercial   wood  per  hectare  of diameter  class 50 cm  and  up  ranged  from  6 -  42 m3,    and for  diameter  class 20 -  50 cm  ranged  from   7 -  48 m3  per  hektar.   The forest density  of  those  two  diameter  classes  varied from   4 -  16  trees and  16  -  64 trees per  hektar,   respectively.2.Forest   logging   operation    has   reduced   the   volume    and   number    of   commercial    trees   per   hectare   (Dipterocarpaceae    and   Non Dipterocarpaceae)   at about  50%  and  38%  respectively.Compared  to TPTI  (Indonesian  Selective  Cutting System)  it was found   that this condition  can not meet  the TPTI  requirements  for  nucleus trees for  the next  cutting  cycle.3.The  logging  operation  has caused  the openings  of  land  cover  at about  30.54%  per  ha or similar  to an area 3054 m2  per  ha
EKSTRAKSI KAYU DENGAN SISTEM KABEL LAYANG GAYA BERA T BER-REM DI AREAL HUTAN TUSAM KPH PEKALONGAN BARAT PERUM PERHUTANI JAWA TENGAH Zakaria Basari; Wesman Endom; Marolop Sinaga
Jurnal Penelitian Hasil Hutan Vol 15, No 6 (1998): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1998.15.6.371-384

Abstract

Untuk mempermudah teknik  pengeluaran kayu tusam pada arah menurun di daerah  topografi berat di Jawa, alternatif penyaradannya adalah  menggunakan sistem kabel layang gaya  berat ber-rem (GSS). Tujuan penelitian ini adalah untuk mengetahui prestasi kerja dan biaya operasi  penyaradan kayu bulat.                                               ,Hasil penelitian menunjukkan bahwa produktivitas kerja rata-rata sebesar 0,22 m3/rit atau  rata-rata sebesar 2,27  m3/jam. Besar biaya tetap alat Rp. 2.308,00/jam dan biaya tidak tetap mencapai  Rp.6444,44/jam. Adapun biaya ekstraksi sebesar Rp. 3.855,70/m3.
PRODUKTIVITAS DAN BIAYA PENGELUARAN KAYU DENGAN SISTEM KABEL P3 HH 20 Dulsalam Dulsalam; Maman M Idris; Wesman Endom
Jurnal Penelitian Hasil Hutan Vol 15, No 3 (1997): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1997.15.3.151-161

Abstract

Penelitian produktivitas  dan biaya pengeluaran kayu dengan sistem kabel layang P3HH 20 telah dilakukan  di BKPH Segaranten, KPH Sukabumi Perum Perhutani  Unit III, Jawa Barat, pada  tahun  1995.  Tujuannya adalah  untuk menguji  coba sistem kabel  layang  buatan Pusat Penelitian  dan  Pengembangan   Hasil   Hutan   dan  Sosial  Ekonomi  Kehutanan  dan   untuk mengetahui produktivitas   dan  biayanya.  Data  spesifikasi  sistem kabel  layang,  ukuran  kayu yang  dikeluarkan,  waktu kerja,  konsumsi  bahan bakar dan oli,  serta upah pekerja dikumpulkan. Hasil penelitian  ini adalah sebagai berikut :1.Alat pengeluaran  kayu sistem  kabel  layang  buatan Pusat Penelitian  dan Pengembangan Hasil Hutan  dan Sosial Ekonomi  Kehutanan,  berhasil dalam operasi mengeluarkan kayu dari jurang kelereng atas.2.Volume kayu yang  dapat dikeluarkan  dengan alat pengeluaran  kayu sistem kabel  layangP3HH 20 berkisar antara 0,061 - 0,308 m3 /rit dengan rata-rata 0,/14Im3/rit3. Produktivitas sistem kabel layang P3HH 20 bervariasi antara 0,575 - 5,508 m3/jam dengan rata-rata 1,856 m3/jam.4. Rata-rata  biaya  pengeluaran   kayu  dengan  sistem  kabel  layang  P3HH  20  adalah  Rp.9.531/m3.5.Rata-rata biaya pengeluaran kayu sistem kabel layang P3HH 20 lebih rendah dibanding biaya pengeluaran kayu sistem Koller 300 yaitu berturut-turut Rp.9.531/m3 dibanding Rp.33.322/m3.6.Kereta dan mekanisme rem disarankan untuk disempurnakan.
ANALISIS PRODUKTIVITAS KERJA EKSTRAKSI KAYU DENGAN SISTEM KABEL LAYANG DALAM SISTEM TEBANG HABIS DI HUTAN JAWA TIMUR Zakaria Basari; Djoko Sumanto; Wesman Endom
Jurnal Penelitian Hasil Hutan Vol 15, No 3 (1997): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1997.15.3.169-189

Abstract

Salah satu sistem pengeluaran kayu bulat yang lebih produktif di dalam kegiatan pembalakan di daerah pegunungan adalah sistem kabel layang. Alat sistem kabel layang yang diteliti adalah jenis mesin yarder merek Isuzu berkekuatan 115 HP. Penelitian bertujuan untuk mengetahui produktivitas kerja.biaya ekstraksi dan aspek ekologis.Produktivitas kerja dilakukan dengan cara menghitung prestasi kerja per jalur, biaya ekstraksi kayu mencakup biaya kepemilikan alat per jam dan biaya operasi per jam , aspek ekologis menghitung dampak keterbukaan lantai permukaan hutan. Hasil pengamatan menunjukkan bahwa produktivitas kerja rata-rata 2.17 m3/jam atau 17.29 m3/hari dengan waktu kerja efektif 5,77 jam/hari. Biaya ekstraksi sebesar Rp 18,596/m3. Perusakan lapisan permukaan tanah sebesar 205,8 m2/ha atau hanya sebesar 1,75 %.
KAJIAN PENGGUNAAN KAPASITAS TRAKTOR KOMATSU D85E- SS DALAM UPAYA PENINGKATAN PRODUKTIVITAS PENYARADAN Wesman Endom; Sukanda Sukanda
Jurnal Penelitian Hasil Hutan Vol 13, No 6 (1995): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1995.13.6.231-245

Abstract

This research was aiming at indentifying the tractor skidding capasity in logging operation in the natural production forest. The tractor observed was Komatsu D85E-SS. and in this study the specific gravity of 0.8 for all species was assumed.The results shows that the capasity of skidding was about 14. 7 ton or equal to 18, 40 m log. However, it was found that from 52 observations, 8% were done under the 20% capacity, 42% of the skidding were done under 21-40% capacity, 25% were done under 40% capacity and 8% were done by winching. .Those figures indicate that the skidder capacity has not yet fully utilized. Therefore, the possibility to increase the volume of skidding is widely open, meaning that the logging wastes can be overcome by skidding those above clear bole parts together with the main log.The cost of skidding per m3 compared with 20 years ago was found to be three times higher. The cost skidding per m3 was about Rp. 3225,- at the averege distance of 3,16 hm.
KAJIAN FAKTOR EKSPLOITASI BERDASARKAN JENIS POHON : STUDI KASUS DI SATU PERUSAHAAN HPH DI KALIMANTAN BARAT (A study on Exploitation Factor in Forest Harvesting Based on Trees Species : A case study in one forest concession holder in West Kalimantan) Wesman Endom; Maman Mansyur Idris
Jurnal Penelitian Hasil Hutan Vol 14, No 1 (1996): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1996.14.1.16 – 23

Abstract

Natural production forests  in Indonesia have been harvested since 1970.  In carrying out the harvesting of the forests, the goverment  used a parameter so called Exploitation Factor  (FE) as a basic calculation of annual allowable production.  Currently  the value of FE is 0. 7 regardless the species.  The value means that only about 70% of log volume can be extracted from  the  forest in the cutting operation.In this study an analysis of FE was carried out to see whether  it is necessary to differentiate the value based on tree species.  Data were collected  from  real logging activity in the forest. An analysis using Honest  by Significant  Difference  test showed that in reality there is no signifi­ cant difference among  the means of FE. This result justifies  the use of single value of FE for all species.Keywords:  Forest, harvesting, logs, conversion factor.
KAJIAN PENGGUNAAN LAHAN HUTAN DAN PERUBAHANNYA MENGGUNAKAN DATA CITRA SPOT LANDSAT DAN RADAR Wesman Endom; Haryono Haryono
Jurnal Penelitian Hasil Hutan Vol 22, No 2 (2004): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2004.22.2.95-111

Abstract

To enhance effectiveness of natural resources evaluation an assessment on the trend of land- use and its impacts is necessary. This is needed by regions which are interacted each others and covering large areas. A remote sensing technology is a reliable and appropriate choice for such area. A study on the land-use assessment was employed using manual method through the implementation of Spot, Landsats, and Radar imageries. The results were as follows:1) Until the year 1980, the concession area situated at Long Nah, administratively under authority of PT Inhutani I. East Kalimantan were mostly still covered by virgin forest with occasional and scattered small villages2)  Manual interpretation using imageries of Spot, Landsats and Radars disclosed the following results: (a) Spot imageries turned out to be 64. 7% as the correct figure and 35.3% as the false figure;, (b) Landsat imageries interpreted 53.3% as correct and 46.7% as false; (c) Radar imageris conducted in March and April 1998 revealed 38. 1% as correct and 61.9% as false.3) Changes forest land-use during the period 1980-1998 occurred in low-land dry forest andpartly in swampy forest, which were further converted to the plantation forest. Meanwhile, the changes for other land-uses among others agriculture were almost insignificant ( less than 3%). This is because soil layers in the corresponding land were thin and acidic rendering unsuitable for agriculture activities.4)  In order to reduce high commission error, the appropriate number of strata relevant to the land-use interpretation should not be too detailed but adequately established as simply aspossible.
Co-Authors Dadan Dadan Djoko Sumanto Dulsalam Dulsalam Haryono Haryono Hasan Basri Ishak Sumantri Maman M Idris Maman Mansyur Maman Mansyur Idris Marolop Sinaga Soenarno Soenarno Sofwan Bustomi Sona Suhartana Sukanda Sukanda Tjutju Nurhayati Yayan Sugilar Zakaria Basari