PERENCANAAN EKO-DRAINASE KAWASAN PERUMAHAN TEMBALANG PESONA ASRI – SEMARANG
ABSTRACT: As the construction
rapidly growing in Indonesia, it causes the land decreasing that can be used to
absorb water. This phenomenon will cause an often flood in rainy season and
drought in dry season. On the other side, the degradation of land infiltrations
as the effect of the changing of
environment. Before the development of the area, the studied area contributes
of flow by 0,167 m3/s and volume of run-off equal to 601,2 m3. After
theconstruction of Tembalang Pesona Asri regency , the post-development peak of
flow and run-off volume increase to 0,573 m3/s and 2061,8 m3. Eco-drainage is
defined as efforts to manage the excess of rainfall water by infiltrating into
the ground as much as possible or flowing naturally into the river without
exceeding the capacity of the river before. Eco-drainage facilities that
offeredin this final task included infiltration wells, and bioretention cell. To restore the flow
and volume of runoff around the pre-construction condition, the minimum
eco-drainage facilities need 177 units of infiltration wellswith diameter size
dimension of 1,5m depth of 3m, 1300 m2
of bioretention cell which 560 m2 located in Blok R and 740 m2 in Blok A. The
construction of this Eco-drainage facility in the Tembalang Pesona Asri regency
area can decrease runoff of 1220,419 m3 or 83,5 % from the runoff water cause
by the regency construction. This construction of the Eco-drainage facility
need approximately 3 months of time with
total cost Rp. 1.209.126.133,-
(one billion two hundred and nine million one hundred twenty-six thousand one
hundred and thirty-three rupias). The houses total in Tembalang Pesona Asri
Regency are 287 units, so each house’s contribution is equal to Rp. 4.212.983,-
(four million two hundred twelve thousand nine hundred eighty three.
Penulis: Aji Aflakhi, Venni
Budi Cahyani, Dwi Kurniani, Hary Budieny
Kode Jurnal: jptsipildd140474
