PENDEKATAN GEOMORFOLOGI UNTUK ANALISIS KERENTANAN KEKERINGAN DI DAERAH ISTIMEWA YOGYAKARTA
Meteorological drought analysis, basing onprecipitation and evapotranspiration, is influenced by the condition of a landform unit. Each landform unit is also used as a unit in assessing the domestic water requirement. This study aimed to assess drought in terms of geomorphological and meteorologi...
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| Main Authors: | , |
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| Format: | Theses and Dissertations NonPeerReviewed |
| Published: |
[Yogyakarta] : Universitas Gadjah Mada
2014
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| Subjects: | |
| Online Access: | https://repository.ugm.ac.id/133879/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=74761 |
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| Institution: | Universitas Gadjah Mada |
| Summary: | Meteorological drought analysis, basing onprecipitation and evapotranspiration, is
influenced by the condition of a landform unit. Each landform unit is also used as a unit
in assessing the domestic water requirement. This study aimed to assess drought in terms
of geomorphological and meteorological aspects as well as water requirement and to
comprehensively analyze geomorphological drought based on the landform units.
Rainfall areas were determined using isohyet, while evapotranspiration was obtained
from water balance based on monthly precipitaion and temperature. In accordance with
the Indonesian National Standard (Standar Nasional Indonesia � SNI) 2002, domestic
water requirement was calculated based on the multiplication of water requirement per
day per capita by total population. The population of each landform unit was interviewed
in order to obtain more actual information.Furthermore, geomorphological analysis was
conducted based on the relief/topography, composing materials, and geomorphological
processes on each landform unit using stratified random sampling.
The results show that the highest drought vulnerability is found in structural, solutional,
and denudational landforms. High rainfall intensity in Sleman and northern part of
Kulonprogo makes these areas not vulnerable to drought. The higher the
evapotranspiration, the more vulnerable an area to drought. Most of the area in the DIY
is moderately vulnerable to drought (Ia = 16.7-33.3). The highest domestic water
requirement in the study area is in volcanic landform, i.e. 163.291.985 liter/day or 48,13
% of total domestic water requirement in the DIY. Comprehensive analysis on
geomorphological drought resulted in a highly vulnerable area of 2,054.38 km
2
or 64.49
% of the DIY. In conclusion, the geomorphological condition of each landform unit plays
a dominant role in drought vulnerability assessment in the DIY. |
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