BEBERAPA ASPEK GEOMETRIKA JALAN HUTAN DAN HUBUNGANNYA DENGAN EROSI TANAH

Djaban Tinambunan

Sari


A  study  on  the  forest road geometrics in  relation   to  the  process  of  soil  erosion  was  carried out  at four  logging companies in Kotawaringin Timur, Central  Kalimantan   in 1988. Road geometric aspects  measured  in the  field  are those related  to the  Universal Soil Loss Equation factors  such  as road openings, surfaces,  slopes,  ditches,  culverts,  cuts,  fills,diversion  ditches,  and  the  incidence   of  vegetation.

The result  shows that  forest road geometrics are in the condition of  high potentials   for  soil erosion.  Factors  that caused  this  problem,  as  identified   in the  field,  are: long and steep slopes, wide ground  openings, and bare soil surfaces, in addition to the  originally  sensitive  to erosion  soil  type,  an.d hot  and  wet  weather.

The concessionaires and  Indonesian Government  have  not  given  proper  attention  to  the  seriousness  of  this  soilerosion  yet.  Qualitatively  we know   that  the  erosion  level  is high  but  quantitatively  we  do not know  the value yet. Therefore, further study is necessary.


Teks Lengkap:

PDF

Referensi


Badan Meteorologi dan Geofisika. 1987. Laporan Evaluasi Sifat Hujan Januari - Desember 1986. Tahun XI No. 1-12, 1987. Dep. Perhubungan, Jakarta.

Brady, N.C. 1974. The nature and properties of soils. 8th Edition. McMillan Publishing Co., Inc., New York.

Frederiksen, P.W. 1970. Erosion and sedimentation following road construction and timber harvest on unstable soils in three small Western Oregon Watersheds. USDA Forest Service Res. Paper PNW-104.

Megahan, W.F. 1972. Logging, erosion, sedimentation are they dirty words? Jour. Forestry 70 (7) : 403-7

-----------, .dan W.J. Kidd. 1972. Effects of logging and log ging roads on erosion and sediment deposition from steep terrain. Jour. Forestry 70 (3) : 136-41.

Meyer, G.I., P.J. Schoeneberger dan J.H. Huddleston. 1975. Sediment yield from road sides: an application of the Universal Soil Loss Equation. Jour. Soil and Water Conserv. 30 (6) : 289-91.

Reid, L.M. 1981. Sediment production from gravel-surfaced forest roads, Clearwater basin, Washington. Fisheries Res. Inst., Univ. of Washington, Seattle, USA. FRIUW-8108.

Swift, L.W. 1984. Gravel and grass surfacing reduces soil loss from mountain roads. Forest Sci. 30 (3) : 657-70.

Trimble, G.R. dan S. Weitzman. 1953. Soil erosion on logging roads. Soil Sci. Soc. Am. Proc. 17 : 152-4.

Wischmeier, W.H. dan D.D. Smith. 1978. Prediting rainfall erosion losse a guide to conservation planning. USDA Agric. Handbook No. 537.




DOI: https://doi.org/10.20886/jphh.1990.6.7.411-419

Refbacks

  • Saat ini tidak ada refbacks.


JURNAL PENELITIAN HASIL HUTAN TERINDEKS DI:

Lebih banyak...


Copyright © 2015 | Jurnal Penelitian Hasil Hutan (JPHH, Journal of Forest Products Research)
eISSN : 2442-8957, pISSN : 0216-4329
JPHH is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.