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Journal : Jurnal Teknik Sipil dan Lingkungan

Analisis Kapasitas Simpan Air di Kecamatan Cibinong, Kabupaten Bogor Natalia, Grace; Pandjaitan, Nora Herdiana
Jurnal Teknik Sipil dan Lingkungan Vol 2, No 3 (2017): Edisi 2 (3) Desember 2017
Publisher : IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsil.2.3.133-142

Abstract

Perubahan tata guna lahan dapat mempengaruhi suplai air suatu area. Kapasitas simpan air adalah salah satu aspek dalam studi neraca air yang menunjukkan ketersediaan air. Penelitian ini bertujuan menghitung potensi suplai air dan menganalisis kapasitas simpan air di Kecamatan Cibinong. Penelitian ini berlangsung sejak April-Juli 2017. Data yang digunakan antara lain data iklim, kepadatan penduduk, dan peta tata guna lahan. Perhitungan dilakukan dengan metode Penman-Monteith menggunakan software CROPWAT. Analisis peta tata guna lahan Kecamatan Cibinong menunjukkan terjadi penurunan kapasitas simpan air di Kecamatan Cibinong, dari 70.01 mm menjadi 64.54 mm sejak tahun 2013 hingga 2015. Rasio supply/demand sebesar 0.14 menunjukkan daya dukung lingkungan berbasis neraca air (DDL-air) terlampaui (overshoot). Peningkatan DDL-air dapat dilakukan dengan pembangunan sumur resapan dan perluasan RTH. Kata Kunci: evapotranspirasi, kapasitas simpan air, tata guna lahan
Evaluasi Saluran Drainase di Perumahan Alam Sinar Sari Kabupaten Bogor Jawa Barat Ekananda, Fahri; Pandjaitan, Nora Herdiana; Rau, Maulana Ibrahim
Jurnal Teknik Sipil dan Lingkungan Vol 3, No 2 (2018): Edisi 3 (2) Agustus 2018
Publisher : IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsil.3.2.117-130

Abstract

Drainage system is one of the important infrastructure components to drain runoff from rainfall. The purpose of this research were to identify the condition of existing drainage system in Alam Sinar Sari Residence, to analyze the discharge using EPA SWMM 5.1 application, and to analyze the suitability of existing drainage system with its runoff. The research was conducted since March 2018 on Alam Sinar Sari Residence which is located in Cibeureum Petir, with the total area of 15 ha. Based on analysis and statistic test, the acceptable distribution model is Log Pearson III model with 5 year return period. The rainfall designed was 175.86 mm. Based on simulation done using SWMM 5.1, the actual debit of conduit C76 were bigger than its planned debit and should be re-evaluated. Conduit C76 had dimension of depth of 0.31 m and width of 0.34 m. Based on simulation the discharge in C76 of 0.088 m3/s was bigger than the planned debit which was only 0.069 m3/s. After evaluation, conduit C76 should undergone changes of width dimension from 0.34 m to 0.50 m to be able to hold runoff.Keywords : designed rainfall, drainage, EPA SWMM 5.1, runoff