SAFITRI, MITHA OCTAVIANA (2023) PENGARUH KEGIATAN PERTANIAN TERHADAP KONSENTRASI TSS, NITRAT DAN FOSFAT PADA PERAIRAN SEKITAR SUNGAI SILUGONGGO (23dsa350). Undergraduate thesis, Fakultas Perikanan dan Ilmu Kelautan.

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Abstract

ABSTRAK
(Mitha Octaviana Safitri. 26010118120018. Pengaruh Kegiatan Pertanian Terhadap Konsentrasi TSS, Nitrat dan Fosfat pada Perairan Sekitar Sungai Silugonggo. Haeruddin dan Oktavianto Eko Jati).
Sungai Silugonggo adalah sungai yang melintasi Kecamatan Juwana, Kabupaten Pati, Jawa Tengah, Indonesia. Sungai Silugonggo dimanfaatkan masyarakat untuk kegiatan sehari-hari, tempat rekreasi dan sumber irigasi untuk mengairi lahan pertanian di sekitar Sungai Silugonggo, di Desa Tondomulyo. Penggunaan pupuk yang berlebihan dan masuk ke sungai dapat menyebabkan pencemaran perairan. Pengambilan sampel air sungai dilakukan pada 3 stasiun (S1, S2 dan S3). S1 terletak di sungai daerah bawah Jembatan Sampang sebelum areal persawahan, S2 terletak di sekitar areal persawahan dan S3 terletak di daerah irigasi. Metode penelitian menggunakan metode survei, yang bersifat deskriptif. Teknik sampling yang digunakan adalah purposive sampling. Pengambilan sampel air sungai dilakukan tanggal 08 Juli 2022 pukul 08.30 WIB di permukaan air. Variabel yang dianalisis yaitu debit air, temperatur, TSS, nitrat, fosfat, pH dan DO. Konsentrasi TSS, nitrat dan fosfat di Sungai Silugonggo pada stasiun 1 berturut-turut adalah 47,67; 5,51; dan 0,074 mg/L, pada stasiun 2 berturut-turut adalah 108; 1,31 dan 0,076 mg/L dan pada stasiun 3 berturut-turut adalah 16,3; 1,59; dan 0,05 mg/L. Hasil analisis yang dilakukan menggunakan Indeks Pencemaran diketahui status pencemaran Sungai Silugonggo yakni tercemar ringan dengan nilai IP sebesar 3,03. Beban pencemarannya yaitu 129,11 kg/hari. Analisis statistik dilakukan menggunakan Uji Kruskal-Wallis sehingga tolak H0 terima H1. Angka signifikan pada Asymp. Sig. pada TSS, fosfat dan nitrat adalah 0,000. Kesimpulan dari analisis tersebut adalah ada pengaruh kegiatan pertanian terhadap variabel TSS, nitrat dan fosfat di sekitar perairan Sungai Silugonggo.
Kata Kunci: Beban Pencemaran, Kualitas Air, Pengendalian Pencemaran, Sungai Silugonggo

ABSTRACT
(Mitha Octaviana Safitri. 26010118120018. Analysis of Pollution Load and Pollution Status of Silugonggo River Due to Agricultural Activities in Tondomulyo Village, Jakenan Pati Haeruddin and Oktavianto Eko Jati).
The Silugonggo River is a river that crosses Juwana District, Pati Regency, Central Java, Indonesia. The Silugonggo River is used by the community for daily activities, as a place for recreation and as a source of irrigation to irrigate agricultural land around the Silugonggo River, in Tondomulyo Village. Excessive use of fertilizers and into the river can cause water pollution. Sampling of river water was carried out at 3 stations (S1, S2 and S3). S1 is located in the river area under the Sampang Bridge before the rice fields, S2 is located around the rice fields and S3 is located in the irrigation area. The research method uses a survey method, which is descriptive in nature. The sampling technique used is purposive sampling. Sampling of river water was carried out on July 8 2022 at 08.30 WIB on the water surface. The variables analyzed were water debit, temperature, TSS, nitrate, phosphate, pH and DO. The concentrations of TSS, nitrate and phosphate in the Silugonggo River at station 1 were 47.67; 5.51; and 0.074 mg/L, respectively at station 2 were 108; 1.31 and 0.076 mg/L and at station 3 respectively 16.3; 1.59; and 0.05 mg/LH. The results of the analysis carried out using the Pollution Index found that the pollution status of the Silugonggo River was that it was lightly polluted with an IP value of 3.03. The pollution load is 129.11 kg/day. Statistical analysis was carried out using the KruskalWallis test so that H0 accepted H1. Significant figures on Asymp. Sig. on TSS, phosphate and nitrate is 0.000. The conclusion from the analysis is that there is an influence of agricultural activities on the variables TSS, nitrate and phosphate around the waters of the Silugonggo River.
Keywords: Pollution Control, Pollution Load, Silugonggo River, Water Quality

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