واسنجی دستگاه به‌‎سوخت‎سنج در ارزیابی مقدار سوخت چوبی در ایران (مطالعه موردی جنگل‌کاری‎‎های کاج تدا در مناطق جنگلی لاکان رشت)

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکترای دانشگاه گیلان، ایران

2 استادیار، دانشکده منابع طبیعی دانشگاه گیلان، ایران

3 دانشیار، دانشکده منابع طبیعی دانشگاه گیلان، ایران

4 دانشیار، مؤسسه تحقیقات جنگلها و مراتع کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران

چکیده

اندازه‎‎گیری مقدار سوخت چوبی افتاده با تغییراتی بر خط‎‎نمونه برای اولین بار به نام خط‏نمونه Brown مطرح شد و از به‎‎سوخت‎‎سنج (go/no go gauge) به‌عنوان وسیله‎‎ای برای اندازه‎‎گیری دقیق مقدار سوخت چوبی در کلاس‎‎های مختلف قطری در بستر جنگل استفاده شد. ارزیابی مقدار سوخت یک نیاز ضروریست که باید در بررسی میزان سوخت‎‎های خطرآفرین در سراسر دنیا، به‌عنوان یک مقوله جدید در مدیریت آتش‎‎سوزی جنگل‎‎های ایران نیز نهادینه شود. برای معرفی و کاربرد به‎‎سوخت‎‎سنج در برآورد مقدار سوخت چوبی در ایران، مواد سوختنی بخشی از مناطق جنگل‎‎کاری گیلان (جنگل‎‎کاری‎‎های کاج تدا) برای واسنجی و بکارگیری این وسیله ارزیابی شد. برای این منظور با آماربرداری منظم- تصادفی و استفاده از خط‎‎نمونه، قطعات چوبی مرده در بستر جنگل توسط خط‎‎کش و به‎‎سوخت‎‎سنج اندازه‎‎گیری و مقایسه شدند. نتایج این بررسی نشان داد که به‎‎سوخت‎‎سنج ضمن راحتی و آسانی در اندازه‎‎گیری سوخت، از کارایی بالا برای ارزیابی و برآورد مقدار سوخت چوبی برخوردار است؛ اگرچه اختلاف معنی‎‎داری از نظر مقدار سوخت محاسبه شده توسط به‎‎سوخت‎‎سنج (21/5 تن در هکتار) و اندازه‎‎گیری مستقیم آن توسط خط‎‎کش (02/5 تن در هکتار) در سطح 95 درصد وجود ندارد. البته به لحاظ سرعت اندازه‎‎گیری نیز، نتایج نشان داد که به‎‎سوخت‎‎سنج می‎‎تواند زمان اندازه‎‎گیری‎‎ها را بیش از یک‎‎سوم کاهش دهد، که این زمان از نظر هزینه‎‎های آماربرداری قابل توجه خواهد بود.

کلیدواژه‌ها

عنوان مقاله [English]

Calibration Instruments go/no go gauge in assessing the fuel Load of wood in the Iran (Case Study Loblolly pine forestation in Lakan city Rasht Forest of Gilan)

نویسندگان [English]

  • Masoud Amin Amlashi 1
  • Mehrdad Ghodskhaا 2
  • Amir Islam Bonyad 3
  • Hasan Pourbabaei 3
  • Mostafa Jafari 4
  • Vahid Gholami 2
1 Phd Student of Gilan university, Iran
2 Assistant Prof., Faculty of Natural Resources, University of Gilan, Someesara, Iran
3 Associate Prof., Faculty of Natural Resources, University of Gilan, Someesara, Iran
4 Associate Prof., Forest Research Division, Research Institute of Forests and Rangelands, Agriculture Research, Education and Extension Organization (AREEO), Tehran, Iran
چکیده [English]

Measure the fuel load of down woody debris with changes Line intersect sampling were proposed by Brown for the first time in 1974, and were used the go/no go gauge as a means to accurately measure the fuel load wood in different classes diameter in the floor of forest. Evaluation of fuel load is critical need to reduce hazardous fuels around the world, which should be a new category to be used the management of wildfires in Iran. For the introduction and use of the go/no go gauge on the estimated fuel load of down woody in Iran forest''s, Combustible materials from the part of Gilan forestation (Loblolly pine forestation) was evaluated for the calibration. For this purpose Were compared down woody debris on the forest floor with ruler and go/no go gauge by using Line intersect sampling in the systematic random sampling method. The results show that the go/no go gauge measures too quickly and easily the forest fuel, in addition to has high efficiency in the evaluation and assessment of fuel load of down woody; so there is no significant difference in the amount of calculated fuel load at 95 percent by the go/no go gauge (5.21 t/h) and the ruler (5.02 t/h). In terms of speed measurement the results showed that the go/no go gauge can lower the more than one third the measure times, that this times will be noticeable in terms of inventory costs.

کلیدواژه‌ها [English]

  • wild fire
  • go/no go gauge
  • Gilan forestations
  • fuel load

مراجع

 
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سابقه مقاله

  • تاریخ دریافت: 12 اسفند 1393
  • تاریخ بازنگری: 29 اسفند 1394
  • تاریخ پذیرش: 09 آبان 1394

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