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All Journal JURNAL REKAYASA Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil
Swastika, Dian
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Civil Engineering, Building, Construction & Architecture Engineering Transportation

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Simulasi Pola Operasi Waduk Batutegi, Provinsi Lampung : Simulation of Batutegi Reservoir Operation Pattern, Lampung Province Swastika, Dian; Wulandari, Dyah Ari; Sriyana, Ignatius
Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil Vol. 11 No. 2 (2022): Cantilever
Publisher : Department of Civil Engineering and Planning, Faculty of Engineering, Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35139/cantilever.v11i2.149

Abstract

Batutegi Reservoir is a multi-purpose reservoir that is used to increase the water supply to the Argoguruh Weir to expand the irrigation area in the Sekampung Irrigation System. Batutegi Reservoir supplies the water demand not only for irrigation, covering an area of 66.573 Ha, but also for hydroelectric power generation (hydropower) of 2 x 14 MW and the raw water supply of 2.250lt/s. The operational curves of the Batutegi Reservoir were prepared in 2017, aiming to control the water release to ensure the planned demand is fulfilled. However, the reservoir operation curves must be reviewed at least once every 5 (five) years to comply with the changes in reservoir conditions and the development of its benefits/functions. The study aimed to determine the reservoir reliability by updating the reservoir operation curves in 3 conditions; wet year, normal year, and dry year using the SOR (Standart Operating Release) simulation method according to the inflow and outflow during the mid-month period. Results showed that in the wet year, normal year, and dry year, the reservoir reliability in supplying water for irrigation, raw water, and hydropower is satisfactory in each period. In conclusion, although some simulation periods showed the final RSL (Reservoir Water Levels) of the reservoir are below the upper limit of the operation curves, they are still above MOL (Minimum Operation Level) hydropower level meaning all supply for irrigation, raw water, and hydropower can be 100% fulfilled.
PENGARUH KEGIATAN KONSERVASI LAHAN PADA KEGIATAN CSWMDR (COUNTERMEASURE FOR SEDIMENT IN WONOGIRI MULTIPURPOSE DAM RESERVOIR) TERHADAP LAJU EROSI LAHAN DI DAERAH TANGKAPAN AIR (DTA) WADUK WONOGIRI Swastika, Dian; Wulandari, Dyah Ari; Sriyana; Maulana, Rifki
JURNAL REKAYASA Vol. 13 No. 1 (2023): Jurnal REKAYASA
Publisher : Fakultas Teknik Sipil dan Perencanaan. Universitas Bung Hatta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37037/jrftsp.v13i1.138

Abstract

Sedimentasi merupakan salah satu permasalahan utama dalam pengoperasian dan pemeliharaan waduk karena dapat menyebabkan penurunan fungsi waduk, demikian juga yang terjadi di Waduk Wonogiri yng telah beroperasi sejak Tahun 1982. JICA Study Team pada tahun 2007 telah menghitung besaran produksi erosi tahunan on farm (lahan) dan off farm (bangunan fisik) yang terjadi di seluruh DAS yang mengalir masuk ke Waduk Serbaguna Wonogiri sebesar 17.279 juta ton per tahun. JICA Study Team melaksanakan kegiatan fisik konservasi Daerah Aliran Sungai (DAS) berbasis masyarakat dalam rangka pelaksanaan Program Countermeasure for Sediment in Wonogiri Multipurpose Dam Reservoir (CSWMDR) yang dibagi menjadi 2 program kerja, yaitu JICA Slice I (pada Tahun 2015) dan JICA Slice II bertujuan untuk mendapatkan laju erosi dan penurunan erosi dengan capaian sesuai dengan target yang telah ditetapkan dalam Implementation Plan.Tujuan dari penelitian ini adalah menganalisis laju erosi pada present condition dan future condition serta penurunan erosi lahan pada kegiatan konservasi CSWMDR penanggulangan sedimentasi di Waduk Wonogiri guna mendukung program kerja JICA Slice II menggunakan metode USLE serta bantuan Software ArcGIS dan tools tambahan Spatial Analyst dan Model Builder. Berdasarkan hasil analisis didapatkan jumlah laju erosi di 10 desa sasaran pada present condition sebesar 158.809,21 m3/tahun, sedangkan jumlah laju erosi pada future condition sebesar 110.354,92 m3/tahun, dan jumlah penurunan laju erosi sebesar 16.268,27 m3/tahun.
Co-Authors Dyah Ari Wulandari Maulana, Rifki SRIYANA Sriyana, Ignatius