Postlogging effects on suspended solids and turbidity-five years observation.
Five years data for postlogging period were analyzed to evaluate the impact of two selective logging methods namely, "Unsupervised" and "Supervised" on Suspended Solids and Turbidity levels. With respect to turbidity, the streamwater quality of undisturbed forest generally...
| Main Authors: | , , |
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| Format: | Conference or Workshop Item |
| Language: | English English |
| Published: |
1990
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/18660/ http://psasir.upm.edu.my/id/eprint/18660/1/ID%2018660.pdf |
| Summary: | Five years data for postlogging period were
analyzed to evaluate the impact of two
selective logging methods namely,
"Unsupervised" and "Supervised" on Suspended
Solids and Turbidity levels. With respect to
turbidity, the streamwater quality of
undisturbed forest generally exceeded the
recommended limit for portable use. Suspended
solids and turbidity levels were both
increased by five and nine folds,
respectively during the first year after
unsupervised logging. However, the increases
due to supervised logging were small and
revert to background level in the second year.
Suspended solids transports for undisturbed
state ranged from 0.08 to 0.24 mt/ha/yr. The
levels were elevated following unsupervised
logging, by 20 folds in the first year and
remained high, between four to five folds in
the subsequent years. Nevertheless, for
supervised logging the suspended solids loads
were only two folds as high as the control's. |
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