AGUSTIN, LENI RAKHMA (2022) ANALISIS KUALITAS AIR SERTA PENENTUAN STATUS MUTU AIR DI KALI KENDAL MENGGUNAKAN METODE STORET (22M181). Undergraduate thesis, Universitas Diponegoro.

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Abstract

ABSTRAK
Leni Rakhma Agustin. (26010118120022). Analisis Kualitas Air Serta Penentuan
Status Mutu Air di Kali Kendal Menggunakan Metode STORET. (Bambang
Sulardiono dan Arif Rahman).
Kali Kendal merupakan salah satu sungai yang terdapat di Kabupaten
Kendal, Jawa Tengah. Kegiatan masyarakat di sekitar daerah aliran sungai tersebut
adalah daerah pemukiman, pertanian, budidaya menggunakan tambak, serta jalur
kapal/perahu nelayan menyumbangkan berbagai jenis limbah ke badan sungai.
Tujuan dari penelitian ini adalah untuk mengetahui kualitas air dan status mutu air
Kali Kendal serta perbedaan variabel yang diuji pada musim penghujan dan musim
peralihan I. Penelitian ini dilaksanakan di Kali Kendal pada tanggal 24 Januari dan
2 Maret 2022. Metode yang digunakan dalam penelitian ini adalah metode survei
yang bersifat deskriptif. Terdapat 3 stasiun pengambilan sampel yakni kawasan
pemukiman, kawasan tambak, serta kawasan muara Kali Kendal, dimana masingmasing stasiun terdapat 3 titik sampling. Kualitas air yang diuji secara in situ
meliputi temperatur, pH, debit dan DO, sedangkan pengukuran ex situ meliputi
TSS, BOD, nitrat, fosfat dan klorofil-a dengan melakukan pengujian di
Laboratorium Teknik Lingkungan Universitas Diponegoro. Hasil penelitian
menunjukkan bahwa variabel temperatur, pH, DO dan nitrat sesuai baku air sugai
mutu kelas III, sedangkan variabel TSS, BOD dan fosfat melebihi baku mutu air
sungai kelas III. Berdasarkan perhitungan STORET diketahui bahwa Kali Kendal
tergolong tercemar sedang dengan nilai STORET pada sampling pertama dan kedua
berkisar antara -15 s/d -25. Berdasarkan hasil uji perbedaan antar waktu sampling
diketahui bahwa terdapat pengaruh terhadap variabel BOD, nitrat, fosfat dan
klorofil-a.
Kata Kunci : Baku Mutu, Kali Kendal, Kualitas Air, STORET

ABSTRACT
Leni Rakhma Agustin. (26010118120022). Water Quality Analysis and
Determination of Water Status in Kendal River Using STORET Method. (Bambang
Sulardiono and Arif Rahman).
Kendal River is one of the largest rivers in Kendal Regency, Central Java.
The activities of the surrounding community such as residential areas, agriculture,
ponds cultivation ponds, and traffic lanes for ships/fishing boats contribute various
types of waste to river bodies. The purpose of this study was to determine the water
quality and water quality status of Kendal River as well as the effect of the rainy
season and transitional season I on the variables tested. This research was
conducted in Kendal River on January 24
th
and March 2
nd
, 2022. The method used
in this research is a descriptive survey method. Sampling consisted of 3 stations
namely residential areas, pond areas and the estuary area of Kali Kedal, where
each station had 3 sampling points. The water quality tested in situ includes
temperature, pH, water flow and DO, while ex-situ measurements include TSS,
BOD, nitrate, phosphate, and chlorophyll-a by conducting tests at the
Environmental Engineering Laboratory, Diponegoro University. The results
showed that the variables of temperature, pH, DO and nitrate were in accordance
with the quality standards, while the variables of TS, BOD and phosphate exceeded
the class IIIriver water quality standards. Based on STORET, it is known that
Kendal River is classified as moderately polluted with STORET values in the first
and second sampling ranging from -15 to -25. The difference between the rainy
season and I had an effect on the variables of BOD, nitrate, phosphate and
chlorophyll-a.
Keywords: Kendal River, Quality Standards, STORET, Water Quality

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