Sofia Wantasen
Fakultas Pertanian, Universitas Sam Ratulangi Manado

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DAMPAK TRANSFORMASI NITROGEN TERHADAP LINGKUNGAN BIOTIK DI DANAU TONDANO PROVINSI SULAWESI UTARA

Jurnal Manusia dan Lingkungan (Journal of People and Environment) Vol 19, No 2 (2012)
Publisher : Pusat Studi Lingkungan Hidup Universitas Gadjah Mada

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Abstract

Nitrogen di lingkungan akan mengalami transformasi ke dalam bentuk-bentuk senyawa antara lain nitrat (N03), nitrit (N02-), ammonia (NH3). Transformasi dari nitrogen menjadi nitrat, nitrit, dan ammonia akan berdampak negatif terhadap lingkungan biotic yaitu terbentuknya kondisi toksik, berdampak negatif pada biota air (flora akuatik), dominansi flora akuatik danau serta berubahnya fungsi ekosistern danau. Penelitian ini bertujuan untuk mengkaji dampak transformasi nitrogen terhadap Iingkungan biotik (flora akuatik) di Danau Tondano. Pengambilan sam pel kualitas air dilakukan dengan menggunakan metode composite sampling pada 24 lokasi sampel di Danau Tondano yaitu 6 sampel di bagian timur dan au, 3 sampel di bagian barat danau, 4 sampel di bagian selatan danau dan 10 sam pel di bagian tengah danau dan 1 sampel di bagian utara Danau Tondano, kemudian dilakukan pengukuran in situ untuk parameter temperatur air, dan pH. Analisis parameter nitrat, nitrit, ammonia dilakukan di Laboratorium Balai Teknik Kesehatan Lingkungan Provinsi Sulawesi Utara. Lokasi pengambilan sampel flora akuatik adalah 1 sampel di bagian barat Danau tondano (Paletoan), 4 sampel di bagian timur danau (Eris, Tasuka, Ranomerut), dan 1 sampel di bag ian utara danau (Tolour). Hasil analisis laboratorium menunjukkan bahwa transformasi nitrogen menjadi nitrat, nitrit, ammonia di permukaan Danau Tondano terkonsentrasi tinggi di bagian timur dan bagian tengah Danau Tondano. flora akuatik yang mendominasi perairan adalah Eceng Gondok ( Eichhornia crassipes) dengan Indeks Nilai Penting (INP) 60-155.

RESIDU PUPUK NITROGEN DI LINGKUNGAN PERAIRAN HULU DAERAH ALIRAN SUNGAI TONDANO PROVINSI SULAWESI UTARA

Bumi Lestari Vol 15, No 2 (2015)
Publisher : Udayana University

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Abstract

The Nitrogen fertilizer which is not absorbed by plant will be impact to residue in  theenvironment.  The aim of this study was to assess the residues of nitrogen in the aquaticenvironment up stream of the Tondano Watershed during 2013-2015 (three years).  Datacollected by observation of agriculture activity and determination of sampling by usingcomposite sampling method in River Panasen which is paddy irrigation outlet canal upstream of the Tondano Watershed during 2013-2015 (three years), was measurement eachthree month and analysis nitrate, nitrite, ammonia in the Laboratory.   Method data analysisare Graphic Method and to compare with standart Goverment PP. No. 82/2001 Class II.Results showed that the nitrogen residue concentration (nitrate, nitrite, ammonia) ataquatic environment in the up stream of Tondano Watershed on the growing season in 2013nitrate concentration: 0,293-0,408 mg/l; nitrite 0,001-0,041 mg/l; ammonia 0,04-0,28 mg/l. in the growing season in 2014  concentration nitrate: 0,184-0,628 mg/l; nitrite 0,020,077mg/l;ammonia0,002-0,13mg/l.inthegrowingseasonin2015concentrationnitrate:0,173-0,585mg/l;nitrite0,001-0,029mg/l; ammonia0,05-0,10mg/l.

TRANSFORMASI NITROGEN DI OUTLET SALURAN IRIGASI DAERAH ALIRAN SUNGAI TONDANO

Sainteknol : Jurnal Sains dan Teknologi Vol 13, No 1 (2015): June 2015
Publisher : Unnes Journal

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Abstract

Nitrogen di lingkungan akan mengalami transformasi ke dalam bentuk senyawa nitrat (NO 3 - ), nitrit (NO 2 - ), ammonia (NH 3 ) Transformasi nitrogen tersebut dipengaruhi oleh kondisi lingkungan. Penelitian ini bertujuan untuk mengkaji transformasi nitrogen di outlet saluran irigasi Daerah Aliran Sungai . (DAS) Tondano. Cara penelitian adalah observasi lapangan terhadap aktivitas pertanian dan pengambilan sampel kualitas air dilakukan dengan menggunakan metode composite sampling pada 25 lokasi sampel di outlet saluran irigasi. Analisis parameter nitrat, nitrit, ammonia dilakukan di Laboratorium Balai Teknik Kesehatan Lingkungan Provinsi Sulawesi Utara. Analisis data menggunakan Metode Grafik dan membandingkan dengan Baku Mutu sesuai PP No. 82/2001 Kelas II. Hasil penelitian menunjukkan bahwa transformasi nitrogen (nitrat, nitrit, ammonia) di outlet saluran irigasi persawahan bagian selatan (konsentrasi NO 3 : 8,6-18,4 mg/l; NO 2 : 0,14-0,25 mg/l; NH 0-2,6 mg/l); outlet saluran irigasi persawahan bagian barat (konsentrasi NO 3 3 : 1,33-12,2 mg/l; NO : 0-0,77 mg/l; NH 0,01-0,86 mg/l) dan outlet saluran irigasi persawahan bagian timur

DISTRIBUSI SPASIO -TEMPORAL NITROGEN DI DAERAH TANGKAPAN AIR DANAU TONDANO PROVINSI SULAWESI UTARA

Bumi Lestari Vol 16, No 1 (2016)
Publisher : Udayana University

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Abstract

The spatio temporal distribution of nitrogen in catchment area of   Lake Tondano wasimportant to investigate because agricultural residue comes from the catchment potentiallydecreased water quality in Lake Tondano. The purpose of this study was to examine thedistribution of nitrogen spatially and temporally in the catchment area of Lake Tondano.The study was conducted in the field and laboratory. Water quality sampling conducted byusing composite sampling on the rivers, lake Tondano and outlet of irrigation channels.The data collected was the total nitrogen, nitrate, ammonia in 2001, 2008 and 2014. Datawere analyzed using Graph Method and Spatial Analysis.        The results showed that the distribution of total nitrogen that has a high concentrationfound in the outlet streams and irrigation canals outlet. High nitrate accumulates in theoutlet of Lake Tondano. Nitrate concentration can be divided into 9 (nine) classes, namelyconcentration of 0.100 to 0.211 mg / l; 0.211 to 0.322 mg / l;  0.322 to 0.433 mg / l;  0.433 to0.544 mg / l; From 0.544 to 0.655 mg / l; From 0.655 to 0.766 mg / l; 0.766 to 0.877 mg / l;0.877 to 0.988 mg / l; and 0,988- 1,100 mg / l. Ammonia, spatially spread evenly on thesurface of Lake Tondano. Ammonia concentration can be divided into 9 (nine) class is aclass that has a concentration of 0.000 to 0.064 mg / l; From 0.064 to 0.129 mg / l; 0.129 to0.193 mg / l; From 0.193 to 0.258 mg / l; 0.258 to 0.322 mg / l; 0.322 to 0.387 mg / l; From0.387 to 0.451 mg / l; 0.451 to 0.516 mg / l; and from 0.516 to 0.580 mg / l. Concentrationsof nitrate and ammonia fluctuated from year to year of observation. This was influenced byfertilization in rice fields.

BIOMONITORING DAMPAK EKOLOGIS MERKURI DI DAERAH ALIRAN SUNGAI TORAUT KABUPATEN BOLAANG MONGONDOW

EUGENIA Vol 22, No 2 (2016)
Publisher : EUGENIA

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Abstract

ABSTRACT Traditional gold mining in Toraut Watershed Bolaang Mongondow District was used Merkuri Amalgamation that produced tailing. Tailing are discharged to river and environment sorounding that can enter Toraut River and flows to the down stream Mongondow river (beach Inobonto). This study aims: 1) To determine Hg concentrations in River Toraut up stream, middle stream and down stream; 2) To determine Hg concentrations in sediment of the River Toraut up stream, middle stream and down stream; 3) To determine Hg concentrations in aquatic plantsof the River Toraut up stream, middle stream and down stream.  Location research in River Toraut up stream, middle stream and down stream. Data collected by observation and laboratory analysis Merkuri concentration in River Toraut, sediment, and aquatic plant. Method data analysis are descriptif, Graphic Method and to compare with standart Goverment PP. No.82/2001 Class II. The analysis showed that the concentration of Merkuri in River Toraut up stream, in the middle stream and down stream is<0.00005 mg/l. The concentration of Merkuri in sediments River Toraut up stream, the middle stream and down stream ranged < 0.05-1.45 mg/kg dry. The concentration of Merkuri in tissue plant aquatic location up stream of the River Toraut, the middle stream and down stream range < 0.001-0.013 mg /kg wet.Keywords : biomonitoring, ecological impacts merkuri, Toraut Watershed

KAJIAN KUALITAS AIR SUNGAI BENING SEBAGAI SUMBER AIR IRIGASI PERSAWAHAN DI DESA MOPUYA SELATAN II KECAMATAN DUMOGA UTARA KABUPATEN BOLAANG MONGONDOW

COCOS Vol 1, No 3 (2018)
Publisher : COCOS

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Abstract

ABSTRACT  The purpose of this study was to determine the water quality of Bening River in Subdistrict Dumoga Utara District Bolaang Mongondow which would be used as rice field irrigation water in the South Mopuya II Village, Subdistrict Dumoga Utara District Bolaang Mongondow. The study was conducted for three months (3 months), namely April to June, the location of water sampling is the Bening River in South Mopuya II Village, then analyzed in the Water Quality Laboratory. The results of the analysis show that the Bening River Sodium Adsorption Ratio (SAR) concentration in the Upper Area (0.61), in theBening River Lower Area (0.59), is in good quality.  DHL (Electrical Conductivity) concentrations in the Bening River in the Upper Area (2.39.10-5dS/m), in the Bening River Lower Area (2.59.10-5dS/m), are in good quality.  TDS (Total Dissolved Solid) concentration in the Bening River in the Upper Area (167 mg/l), in the Bening River Lower Area (181 mg/l), in good quality. Chloride (Cl) Concentration on Bening River in the Upper Area (0.031 me/l), in the Bening River Lower Area (0.051 me/l), in good quality. Boron (B) Concentration on Bening River in the Upper Area (0.005 mg/l), in the Bening River Lower Area (0.005 mg/l), in good quality.  Nitrate (NO3) concentrations in the Bening River in the Upper Area (0.147 me/l), in the Bening River Lower Area (0.179 mg/l), in the good category.  pH concentration in the Bening River in the Upper Area (8.19), in the Bening River Lower Area (7.55), in good quality.  The results of the analysis of Bening River water quality are still in good category or meet the requirements in accordance with the value of Irrigation Water Quality Standards Ayers and Wetscot, 1985.  Keywords:, Water Quality, Sungai Bening, Irigation Water.