KAJIAN PENGEMBANGAN PENGELOLAAN SUMBERDAYA AIR PADA WILAYAH SUNGAI PROGO-OPAK SERANG DENGAN RIBASIM
Penulis: Bambang Yulistiyanto
dan Bambang Agus Kironoto
ABSTRACT: Land use
change in Progo-Opak-Serang (POS) River Basin
has caused hydrologic
behavior change, which it
is shown by the
flooding events during
the rainy season,
and the lack
of water allocation during the
dry season. To anticipate hydrologic behavior and
water demand changes
in the future, integrated water
resources managements in Progo-Opak-Serang (POS) River
Basin, should be elaborated
in the arrangement as well
as development program. Water
resources allocations of the Progo-Opak-Serang (POS) River Basin at the present
time (in the year of 2005) and in the
future (i.e. in
the year of
2015 and 2025) which
are based on several
difference developement scenarios were analysed and modeled
by using RIBASIM
Software. Calculation of water
resources allocation was carried
out by dividing the POS River
Basin area into 52 water districts. Water balance analysis show there is
surplus of water in most of water districts
in Progo-Opak-Serang River
Basin during the
rainy season, and
some of them
are shortage of
water during the dry season The highest water
demand of POS River
Basin is used
for irrigation, which achieves
to 82 % of total water demands, while for MDI
(Municipal, Domestic, and Industry) achieves to 17.6 %, and fish pond, 0.4 %.
By applying several scenarios of water resources development managements, i.e.,
by increasing the irrigation efficiency at about 5 %, rearranging the planting
cultivation, and providing a new reservoir in down stream Progo River basin,
i.e, Tinalah reservoir, the deficit of water balance during the dry season can
be reduced significantly.
Keywords: water balance, water resources management,
scenarios of water resources development, Ribasim
Kode Jurnal: jptsipildd080003
