florianus selvinus vivin
Mahasiswa Fakultas Pertanian Universitas Tanjungpura

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STUDI KUALITAS AIR UNTUK IRIGASI DI SUB DAS NGARAK DAS MANDOR vivin, florianus selvinus; Saifudin, Saifudin; Widiarso, Bambang
Jurnal Sains Mahasiswa Pertanian Vol 2, No 3: Desember 2013
Publisher : Jurnal Sains Mahasiswa Pertanian

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Abstract

ABSTRAK Daerah aliran sungai (DAS) merupakan daerah dimana semua airnya masuk ke dalam sungai yang dipisahkan oleh topografi, keadaan DAS pada suatu daerah akan menunjukan kondisi lingkungan yang ada di sekitarnya. Penelitian ini bertujuan mengetahui klasifikasi kesesuain air untuk irigasi di daerah aliran sungai (DAS) Ngarak Kecamatan Mandor. Penelitian ini di lakukan pada 2 (dua) outlet yang terdapat pada DAS ngarak Kecamatan Mandor yaitu outlet A dan outlet B. Penelitian ini berlangsung mulai bulan Desember 2012 samapai bulan Mei 2013 dengan luas keseluruhan kurang lebih 6.750 ha. Penelitian ini diawali dengan mengupulkan data biofisik DAS yang meliputi kelas lereng, jenis tanah, penggunaan lahan, hurah hujan dan pertanian. Metode analisi kualitas air yang dilakukan yaitu pengukuran langsung di lapangan dan pengukuran di laboratorium dengan parameter pengamatan meliputi ; Salinitas, Boron, SAR, RSC, Temperatur, pH Air, Debit Aliran, Kecerahan, Alkalinitas, dan Kandungan Sedimen. Hasil pengukuran sampel air menunjukan nilai rata-rata Salinitas berkisar antara 0,0073 ds/m – 0,077 ds/m, kadar Boron rata-rata berkisar antara 0,017 mg/l – 0,018 mg/l. Nilai SAR rata-rata berkisar antara 1,003 – 1,486, RSC rata-rata berkisar antara 0,0062 meq/l – 0,0314 meq/l, dan variabel pendukung yaitu, Temperatur air rata-rata berkisar antara 26,68 C0 – 27,12 C0, pH air rata-rata berkisar antara 6,73 – 6,85, Debit Aliran rata-rata berkisar antara 0,979 m3/detik – 2,017 m3/detik, Kecerahan air rata-rata berkisar antara 48,6 cm – 110,8 cm, dan Alkalinitas rata-rata berkisar antara 5,26 mg/l – 7,18 mg/l serta Kandungan Sedimen rata-rata berkisar antara 5,4 mg/l – 18,8 mg/l. Berdasrkan hasil analisis dan perhitungan variabel utama dan variabel pendukung, air pada DAS Ngarak Kecamatan Mandor dapat digunakan untuk irigasi karena berdasarkan klasifikasi kesesuaian air untuk irigasi, DAS Ngarak Kecamatan Mandor  pada kriteria sesuai untuk klas irigasi.    
WATER QUALITY STUDIES FOR IRRIGATION ON SUB WATERSHEDS NGARAK WATERSHEDS MANDOR vivin, florianus selvinus; Saifudin, Saifudin; Widiarso, Bambang
Jurnal Sains Mahasiswa Pertanian Vol 2, No 3: Desember 2013
Publisher : Jurnal Sains Mahasiswa Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Watersheds is an area where all the water goes into the river that separated by topography, watershed condition at an area will show the conditions that exist in the surrounding environment. This study aims to determine the classification spesific water for irrigation in the watershed Ngarak District Overseer. This research was done in two (2) outlets located on the watershed Ngarak Mandor District outlet A and outlet B. The study took place from December 2012 until May 2013, with a total area of approximately 6,750 ha. This study begins by collecting biophysical data that includes classroom watershed slope, soil type, land use, rainfall and agriculture. The Method of water quality analysis has done of direct measurements in the field and laboratory measurements with observational parameters include: Salinity, Boron, SAR, RSC, temperature, water pH, flow discharge, Brightness, alkalinity, and Content of Sediments. The measurement results of water samples showed an average salinity values ??ranged from 0.0073 ds / m - 0.077 ds / m, the average level of Boron ranged from 0.017 mg / l - 0.018 mg / l. Average SAR values ??ranged from 1.003 to 1.486, the average RSC ranged between 0.0062 meq / l - 0.0314 meq / l, and a supporter of the variables, the average water temperature ranged between 26.68 C0 - 27, 12 C0, the average pH of the water ranged from 6.73 to 6.85, the average flow discharge ranged from 0.979 m3/second - 2,017 m3/second, Brightness average water ranged from 48.6 cm - 110.8 cm, and alkalinity ranged from an average of 5.26 mg / l - 7.18 mg / l and the average content of sediments ranged from 5.4 mg / l - 18.8 mg / l. Based on the analysis and calculation of the main variables and the supporting variables, the water Watershed District Overseer Ngarak can be used for irrigation because it is based on the classification of the suitability of water for irrigation, watershed Ngarak Mandor District on appropriate criteria for irrigation class.