Evaluasi Titik Sampling Kualitas Air Sungai Brant As Dengan Aplikasi Model HP2S (Hidrodinamika Penyebaran Polutan Di Sungai)

Indraswari, Hermien (2007) Evaluasi Titik Sampling Kualitas Air Sungai Brant As Dengan Aplikasi Model HP2S (Hidrodinamika Penyebaran Polutan Di Sungai). Masters thesis, Institut Teknologi Sepuluh November.

Text 3305201005-Master_thesis.pdf Restricted to Repository staff only Download (48MB)

Abstract

Beban pencemaran limbah domestik maupun limbah industri terhadap Daerah Aliran Sungai (DAS) Brantas semakin meningkat. Selain itu, pemanfaatan air serta tuntutan akan kebutuhan kualitas air yang memadai dari tahun ke tahun terus meningkat. Dengan adanya kondisi tersebut, diperlukan perencanaan pengelolaan kualitas air dan pemantauan yang andal. Untuk perencanaan pengelolaan kualitas air dan pemantauan yang andal, diperlukan lokasi titik sampling yang mewakili/representatif dan dapat menggambarkan kondisi kualitas air yang sesungguhnya.
Jumlah titik sampling yang telah ditetapkan oleh Perum Jasa Tirta I di Sungai Brantas ada 15 titik sampling. Peneliti menetapkan 6 lokasi titik sampling di Sungai Brantas Tengah dan Brantas Hilir untuk dievaluasi berdasarkan buangan limbah industri ke sungai dan pengaruh masukan anak sungai.
Penelitian dilakukan dengan menggunakan model HP2S (Hidrodinamika Penyebaran Polutan di Sungai) yang didasarkan pada hukum kekekalan energi dan kekekalan massa serta dapat mengidentifikasikan arah penyebaran polutan dua dimensi (horizontal) di sungai dengan variasi kecepatan. Model HP2S menggunakan metode numerik beda hingga eksplisit leap frog yang divisualisasikan dengan program komputer Matlab. Running model menggunakan data sekunder parameter COD dari Perum Jasa Tirta I yang diambil pada musim kemarau. Sedangkan, kalibrasi koefisien menggunakan data primer. Kondisi aliran Sungai Brantas Tengah dan Brantas Hilir pada musim kemarau bersifat laminer dengan nilai kecepatan berkisar antara 0,05 m/detik–0,9 m/detik dan arah aliran sungai berbelok dan lurus. Kualitas air masih memenuhi persyaratan baku mutu sungai.
Berdasarkan hasil running model HP2S, dari 6 (enam) lokasi titik sampling yang dievaluasi, 3 (tiga) titik sampling dianggap mewakili/representatif, sedangkan 3 (tiga) lokasi yang lain perlu dikaji ulang titik pengambilan sampelnya agar sesuai dengan arah penyebaran polutan di sungai.
=================================================================================================================================
Pollution loads in the Brantas River Basin (DAS) are increasing significantly and are expected to become much higher in the future. On the other hand, water utilization in the Basin requires water resources of good quality, which should increase every year to meet the required standards. Under these circumstances, water quality management planning and reliable periodic monitoring activities require representative sampling locations that can describe the actual condition of water quality.
The number of sampling points in the Brantas River that has been established by Perum Jasa Tirta I is approximately 15 points. In this study, the researcher established 6 sampling points in the middle and lower reaches of the Brantas River to be evaluated based on industrial wastewater discharge into the river and the influence of inflows from tributaries in those reaches.
This research is conducted using the HP2S model, which is based on the laws of energy and mass conservation. The model is able to identify the two-dimensional (2-D) horizontal direction of pollutant dispersion in the river at various flow velocities. The HP2S model uses the leap-frog explicit finite-difference numerical method, visualized using the MATLAB computer program. The model uses secondary data on the COD parameter during the dry season provided by Perum Jasa Tirta I. Primary data are used for coefficient calibration. Flow conditions in the middle and lower reaches of the Brantas River during the dry season are predominantly laminar, with velocities ranging from 0.05 m/s to 0.9 m/s. The direction of river flow varies from meandering to straight. The water quality conditions in these reaches still meet the required standards.
Based on the results of the HP2S model, of the 6 sampling points evaluated, 3 sampling points are considered representative. On the other hand, the locations of the other sampling points need to be reviewed and adjusted to ensure that they are appropriately positioned according to the direction of pollutant dispersion in the river.

Item Type:	Thesis (Masters)
Additional Information:	RTL 628.162 Ind e
Uncontrolled Keywords:	model HP2S, penyebaran polutan, sungai Brantas Tengah dan Hilir, titik sampling, HP2S model, dispersion pollutant, Brantas Middle and Lower Reaches, sampling point
Subjects:	T Technology > TD Environmental technology. Sanitary engineering > TD430 Water--Purification.
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Environmental Engineering > 25101-(S2) Master Thesis
Depositing User:	magang .
Date Deposited:	18 Sep 2026 03:59
Last Modified:	18 Sep 2026 03:59
URI:	http://repository.its.ac.id/id/eprint/144668

Actions (login required)

View Item