KUALITAS AIR IRIGASI PERTANIAN DI KECAMATAN RAKIT, BANJARNEGARA
SARJONO, Ir. Anjal Anie Asmara, M.Si. ;Dr. Cahyo Wulandari, S.P., M.P.
2015 | Skripsi | S1 ILMU TANAHAir merupakan kebutuhan pokok semua makhluk hidup. Ketersediaan air di Kecamatan Rakit, Banjarnegara yang berasal dari Sungai Serayu sangat melimpah untuk kegiatan pertanian. Peningkatan jumlah penduduk dan perbedaan penggunaan lahan akan berdampak pada penurunan kualitas maupun kuantitas air. Tujuan dari penelitian ini adalah untuk mengidentifikasi dan menilai kesesuaian air irigasi untuk lahan pertanian. Parameter yang digunakan adalah parameter fisika, kimia, dan biologi air yang dibandingkan dengan standar baku mutu air kelas IV berdasarkan Peraturan Pemerintah No.82 Tahun 2001 tentang kualitas air. Penelitian ini dilaksanakan di Kecamatan Rakit, Banjarnegara dari bulan Mei hingga Juli 2015. Metode yang digunakan untuk menentukan status mutu air adalah metode STORET. Pelaksanaan penelitian dimulai dari prasurvei, survei, pengambilan sampel air, analisis sampel air di laboratorium, dan analisis data. Hasil dari uji analisis air yang dimulai dari titik sampel T0 hingga T13, untuk parameter fisika dan kimia air menggunakan metode STORET menunjukkan kualitas air irigasi pada lahan pertanian konvensional di Kecamatan Rakit, Banjarnegara masih di dalam ambang batas aman dan sesuai dengan standard baku mutu air untuk pertanian. Parameter biologi air masuk dalam kelas D dengan skor -36 yaitu tercemar berat. Hal ini diakibatkan karena akumulasi dari Fecal Coliform dan Total Coliform yang melebihi ambang batas baku mutu air kelas IV, berdasarkan PP. No. 82 Tahun 2001. Secara umum kualitas air irigasi di Kecamatan Rakit, Banjarnegara masih baik sekali untuk kegiatan pertanian. Kata kunci : kualitas air, irigasi, metode STORET, Fecal Coliform dan Total Coliform
Water is a crucial need of all organisms. The availability of water in the District of Rakit, Banjarnegara which came from the Serayu River is abundant amount of water for agricultural activities. The growing of population and different of land use will decrease its quality as well as the water quality. The purpose of this research was to identify and to measure the suitability of the irrigation water for farmlands. The parameters being used were physical, chemical, and biological water which were compared with the standard water quality class IV, based on Government Regulation Number 82 Year 2001 about water quality. This research was done in the District of Rakit, Banjarnegara, on May to July 2015. The method being used was the STORET method. The research started from pre-survey, survey, water sample acquirements, water sample analysis in a laboratory, and data analysis. The results of the water analytical test from sample point T0 to T13, for the physical and chemical parameter of the water using the STORET method showed that the irrigation water quality on conventional farmlands in the District of Rakit, Banjarnegara were still within the safe boundary and fit the standard of water quality for agriculture. The biological water parameter was categorized in D class with the score of -36 which indicates that it is highly polluted. This was affected by the accumulation of Fecal Coliform and Total Coliform that exceeded the water quality standard limit class IV, based on Government Regulation Number 82 Year 2001. In general, irrigation water quality in the District of Rakit, Banjarnegara is still remarkably suitable for agricultural activities. Keywords: water quality, irrigation, STORET method, Fecal Coliform, and Total Coliform
Kata Kunci : water quality, irrigation, STORET method, Fecal Coliform, and Total Coliform
