ARFASTYA, FARRAS DAFFA (2023) STUDI PERSEBARAN KANDUNGAN FOSFAT DAN MPT DI PERAIRAN MUARA SUNGAI SLAMARAN, KOTA PEKALONGAN (23dos176). Undergraduate thesis, Fakultas Perikanan dan Ilmu Kelautan.

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Abstract

ABSTRAK
(Farras Daffa Arfastya. 26050119140122. Studi Persebaran Kandungan
Fosfat dan Material Padatan Tersuspensi (MPT) di Perairan Muara Sungai
Slamaran, Kota Pekalongan. Azis Rifai dan Sri Yulina Wulandari)
Kota Pekalongan dilalui beberapa aliran sungai, salah satunya adalah
sungai Slamaran yang menjadi tempat masuknya zat hara fosfat dari darat ke laut.
Fosfat merupakan bahan organik yang dihasilkan dari limbah domestik maupun
pertambakan dan mampu mempengaruhi kesuburan perairan. Nilai konsentrasi
fosfat di perairan dapat dipengaruhi oleh material padatan tersuspensi (MPT).
Penelitian ini bertujuan mengkaji persebaran konsentrasi fosfat dan konsentrasi
MPT serta mengkaji hubungan antara sebaran fosfat dan sebaran MPT di muara
sungai Slamaran, kota Pekalongan. Pengambilan data lapangan dilakukan pada
tanggal 17 Juli 2022 di 15 titik stasiun pada perairan muara sungai Slamaran.
Sampel air diambil dari lapangan dan dianalisis di laboratorium untuk menentukan
konsentrasi fosfat dan MPT. Analisis konsentrasi fosfat menggunakan metode yang
digunakan oleh Strickland dan Parson (1968) sedangkan analisis MPT
menggunakan metode gravimetri. Peta sebaran konsentrasi fosfat dan MPT dibuat
dengan software ArcGis. Citra satelit sentinel 2 digunakan untuk membuat peta
dasar area kajian. Arus permukaan laut dimodelkan secara numerik dengan
software Mike 21 dengan input data angin, data pasang surut, dan data kedalaman.
Model arus selanjutnya divalidasi dengan arus hasil pengukuran lapangan dan
pasang surut untuk menentukan nilai RMSE dan MAE. Analisis korelasi Pearson
digunakan untuk menentukan korelasi antara konsentrasi fosfat dan konsentrasi
MPT. Hasil penelitian menunjukkan bahwa nilai konsentrasi fosfat memiliki
rentang 0.44 µM – 1,84 µM, dan konsentrasi MPT memiliki rentang 56 mg/L -
152 mg/L. Berdasarkan peta persebaran fosfat dan MPT di perairan muara Sungai
Slamaran, diduga bahwa persebaran fosfat dan MPT mendapat pengaruh dari
masukan sungai dan tambak udang yang berada di aliran sungai Slamaran. Hasil
analisis korelasi menunjukkan korelasi yang tidak cukup kuat antara sebaran
konsentrasi fosfat dengan sebaran MPT.
Kata kunci: Fosfat; MPT; arus laut; muara sungai; Slamaran

ABSTRACT
(Farras Daffa Arfastya. 26050119140122. Study of Phosphate and TSS
Distribution in the Estuary Waters of Slamaran River, Pekalongan City. Azis Rifai
dan Sri Yulina Wulandari)
Pekalongan city is crossed by several rivers, including Slamaran River.
This river be the entry point for phosphate nutrients from the land to the sea. The
phosphate nutrients is organic matter that originated from domestic and
aquaculture waste. Phosphate nutrient can affect the productivity in Slamaran
River estuary waters. This study aims were determine the concentration of
Phosphate and TSS as well as the other factors that influence their distribution, and
examine the correlation between phosphate and TSS concentrations in the
Slamaran River estuary In situ data were carried out on 17 July 2022 from 15
observation stations at Slamaran River estuary. Water samples were directly taken
from the field and be analyzed at the laboratory to determine the Phosphate and
TSS concentration. Phosphate concentration analysis used the method by
Strickland and Parson (1968). While TSS concentration analysis used the
gravimetric method. The distribution of Phosphate and TSS concentration then
mapped using ArcGIS software. The Sentinel 2 satellite image used to create the
base map of study area. The ocean surface currents was numerically modeled used
Mike 21 software based on wind, tidal, and bathymetry data. The surface current
model then be validated with surface current measured data and tidal data. RMSE
and MAE methods were used to determine the surface current model accuracy.
Pearson correlation method was used to analyzed the correlation between
phosphate and TSS concentration. The results showed that phosphate concentration
were ranged from 0.44 µM – 1,84 µM mg/L and TSS concentration were ranged
from 56 mg/L - 152 mg/L. Based on distribution map of phosphate and TSS in the
Slamaran River estuary, it was predicted that phosphate and TSS distribution
influenced by inputs from the river and shrimp ponds along the Slamaran river flow.
The results of the correlation analysis showed that the correlation between
phosphate concentrations distribution and the TSS distribution was not strong
enough.
Keywords: Phosphate; TSS; Estuary; current model; Slamaran

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