Title: Development of a, biological water quality assessment system for the Sumberjaya watershed in Sumatra (Indonesia)
Authors: Mouton, Ans ×
Dedecker, Andy
Stuer, Veerle
De Ridder, Katelijne
Verbist, Bruno
Adriaenssens, Veronique
Goethals, Peter
De Pauw, Niels #
Issue Date: 2005
Publisher: Universiteit Gent
Series Title: Communications in Agricultural and Applied Biological Sciences vol:70 issue:2 pages:199-202
Abstract: The conversion of forests into agricultural fiel
ds is causing major erosion problems and increased
sediment transportation in the river system of the Sumberjaya watershed (Sumatra, Indonesia). In
order to analyze the link between land use and aqua
tic ecosystem degradation, sampling sites were
selected based on differences in land use, ranging from
pristine forests to intensively cultivated areas.
Insight in the biological water quality was obtained by benthic macroinvertebrate sampling during the
rainy and the dry season. Physical, chemical and morphological variables were measured to
characterize each site into detail. Statistical analys
is revealed that rice paddy fields have a higher
impact on macroinvertebrate populations compared to
coffee cultivation. This disparity was enhanced
during the rainy season, probably due to increased r
un-off. The isolated impact of peak flow
disturbance was revealed by comparing the refe
rence site populations of both seasons. The results
were summarized in an indicator tool that could be
used by co-operations of farmer groups, NGOs and
local governments. In contrast to rather dynamic i
ndicators like the river water turbidity currently in
use, these biological indicators can be more stable
and valuable instruments for the assessment of land
use effects on aquatic ecosystems.
ISSN: 1379-1176
Publication status: published
KU Leuven publication type: AT
Appears in Collections:Division Forest, Nature and Landscape Research
× corresponding author
# (joint) last author

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