PERENCANAAN LONG STORAGE KEMALANG KABUPATEN KLATEN JAWA TENGAH
ABSTRACT: Irrigation water
demand and raw water in Klaten regency is increasing in line with population
growth. Raw water needs in Klaten regency have been obtained from well water.
For the Government in this case the Department of Water Resources Management
(PSDA) seeks to develop new sources of raw water by building Kemalang Long
Storage. As the rainy season water reservoir, water reservoir can also be
efficiently used in the dry season. Design of long storage Kemalang aims to
meet the needs of raw water in three districts Karangnongko, Manisrenggo and
Kebonarum and irrigation water to irrigate an area of 322 ha. Based on the
mainstay discharge analysis by the method of F.J Mock obtained the discharge
mainstay minimum of 125 liters/sec. For the body design of the long storage dam
used the flood discharge hydrological data HSS Gamma I method with flood
discharge plan 50 years return period amounted 43,432 m3/sec. Kemalang Long
Storage reservoir volume is 27.235,10 m3. Long storage is planned to supply raw
water at 0,138 m3/sec and irrigation water needs by 23 liters/sec/ha. The
planned long storage dam 14,5 m high, with a base elevation ponds +348,00 m,
+362,5,00 m dam crest elevation, surveillance 1,5 m high, 6 m wide dam crest,
upstream slope of 1:3, 1:2,25 downstream slope. In planning this Kemalang Long
Storage used Ogee threshold type spillway width 10 m with a height of 1,5 m and
a spillway crest elevation of +359,00 m, using an eject pond flat type III with
a length of 9,5 m. This project implementation is scheduled for 24 weeks with a
budget plan of Rp.5.166.595.000,00.
Penulis: Tony Susanto,
Muhammad Idu Zaman Suquti, Sriyana, Slamet Hargono
Kode Jurnal: jptsipildd160258
