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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472 EISSN: 1735-1472
Vol. 12, No. 5, 2015, pp. 1481-1494
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Bioline Code: st15138
Full paper language: English
Document type: Research Article
Document available free of charge
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International Journal of Environment Science and Technology, Vol. 12, No. 5, 2015, pp. 1481-1494
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Hydrologic impacts of climate and land-use change on Namnam Stream in Koycegiz Watershed, Turkey
Baloch, M.A.; Ames, D.P. & Tanik, A.
Abstract
The effects of land-use and climate change on
the hydrologic regime of the Namnam Stream in the Koycegiz
Watershed, Turkey, are quantified using a hydrologic
simulation modeling system under a number of real
and potential scenarios. The study shows that urbanization
has induced severe modification in the magnitude, frequency,
and duration of extreme flow conditions. The mean
annual flows increased by 5–60 % due to 0.1–50 %
increase in impervious surfaces. Additionally, confounding
climate change impacts include an increase in low flow
pulses of 2 % when considering a decrease in precipitation
by 20 % and a decrease in low flow pulses of 12 % when
considering a 20 % increase in precipitation. The watershed
system under investigation is significantly more sensitive
to climate change scenarios involving additional
inputs of precipitation compared with scenarios involving
reductions in precipitation and that these changes are
compounded in the presence of major land-use change.
These results suggest the need for erosion control, nutrient
management and habitat conservation in light of rapid
urbanization, as often typified in developing countries, and
potential climate change to conserve essential watershed
functions.
Keywords
Hydrologic regime; Deforestation; Urbanization; Scenario analysis; Climate change
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