MANAGEMENT AND DEVELOPMENT OF CASCADE RESERVOIR IN THE UPSTREAM OF KOMERING WATERSHED IN ORDER TO RESTRAIN ITS DESTRUCTIVE FORCE AND TO MEET RAW WATER DEMAND IN THE DOWNSTREAM AREA - EQUATORIAL RAINFALL ZONE
Climate and land cover change lead to hydrological regime alteration, threatening the water resources sustainability, therefore the water supply infrastructure adaptation or adjustment efforts and mitigation were performed. The effort to meet the growing water demand from limited water resources...
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| Format: | Dissertations |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/44446 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Climate and land cover change lead to hydrological regime alteration, threatening
the water resources sustainability, therefore the water supply infrastructure
adaptation or adjustment efforts and mitigation were performed. The effort to meet
the growing water demand from limited water resources availability required an
integrated planning of river area in order to determine the appropriate step and
action to optimize the potential natural resources (water resources) and to protect
/ conserve and also to improve natural resources. Research was conducted in the
Upper Komering watershed region particularly Ranau Lake - Perjaya Headwork
in the equatorial rainfall area. Carrying capacity of unmanaged water resources
led to water damage (drought and flood). Water damage had occurred in the
Komering watershed, where the extremities in the upper watersheds discharge
resulted in the damage of river walls (river runoff diversion). This dissertation aims
to develop a conceptual model of management optimization of upstream of
Komering watershed reservoir cascade in the equatorial rainfall area in order to
restrain the Komering watershed destructive force and to ensure the water
resources sustainability. The data used in the study were mostly secondary obtained
from River Project Department VIII, Meteorology Climatology and Geophysics
Department, The Musi River Bureau and other data to support the data processing
particularly the main component of hydrological rainfall and discharge. The study
was conducted in four stages. The first stage was collecting data in the studies of
hydrological regime characterization in the upstream of Komering watershed. The
second stage was analyzing the existence of reservoir development in the upstream
of Komering watershed to control its destructive power and to increase the water
resources availability. The analysis of reservoir operational pattern was carried
out by using deterministic to determine the reservoir trajectory guidance and
optimization by using The Discrete Markov model of discharge forecast. The third
stage was the reservoir optimization by applying the continuous models of
discharge forecast. The fourth stage was to analyze the flood, before and after the
development of the reservoir.
The results showed that an optimization model was achieved if the actual trajectory
guideline of the reservoir (dry, normal and wet) was approaching the built track
guidelines (PP 37 in 2010). The optimization from continuous models was better
than discrete stochastic models. Calibration results of historical discharge and
Markov prediction model for Ranau Lake and Tiga Dihaji reservoir were 0.7019
and 0.6470, respectively while the correlation values between their reservoir
trajectory guidelines and their actual ones were 0.8743 and 0.8352, respectively.
The continuous model gave correlation values between trajectory guidelines and
their actual ones for Ranau Lake and Tiga Dihaji reservoir of 0.9110 and 0.8987,
respectively. Flood historical tracking in the upstream of Komering watershed
based on the peak runoff analysis occurring in the Perjaya Headwork before the
reservoir development was 4,500 m3/sec and after was 3,500 m3/sec. |
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