Studi Sebaran Sedimen Dasar di Perairan Sungai Banjir Kanal Timur Semarang, Jawa Tengah

Abstract

Banjir Kanal Timur merupakan gabungan Tambak Lorok (Kali Banger) dan Kali Tenggang. Adapun sungai Banjir Kanal Timur melintasi kota Semarang bagian timur yang padat pemukiman dan industri. Banyak aktivitas manusia dan industri di sekitar daerah aliran sungai (DAS) ini. antara lain adalah industri tekstil, bahan makanan, bahkan terdapat tempat pelelangan ikan. Banyaknya aktiviitas manusia di sekitar wilayah sungai ini menimbulkan berbagai permasalahan lingkungan seperti penurunan kualitas air dan peningkatan proses sedimentasi pada mulut muara merupakan permasalahan yang ditimbulkan. Proses sedimentasi di muara sungai yang terjadi terus menerus akan menyebabkan pendangkalan dan sulitnya akses untuk menuju ke laut lepas. Tujuan dari penelitian ini adalah untuk mengetahui jenis sedimen dasar di Perairan Banjir kanal Timur dan melihat pola arus yang mempengaruhi. Sedimen dasar diambil secara langsung juga melaukan pengukuran batimetri. Terdapat 10 stasiun yang menjadi daerah penelitian dimana 2 stasiun berada di Muara Sungai Banjir Kanal Timur, dan lainnya berada di perairan yang lebih dalam. Hasil pengolahan data menunjukkan bahwa jenis sedimen yang berada di Muara Sungai Banjir Kanal Timur adalah lanau dan daerah yang lebih dalam mengandung pasir. Pola arus pada Perairan Banjir Kanal Timur merupakan arus pasang surut.

Sediment Suspension Distribution Models in East Canal Flood Estuary Waters, Semarang, Central Java, Indonesia

“…Meanwhile, at low tide, the sediment suspension goes north towards deeper waters, where there is no TSS input in deep waters so that the sediment suspension melts and allows it not to settle. This is supported by the statement of [3], where the sediment content leading to the high seas from the waters of the East Flood Canal is dominated by sandy sediments, so that it can be stated that the water area leading to the high seas does not occur in sediment suspension.…”

“…The East Flood Canal River, one of the huge and long rivers that traverse highly populated residential neighborhoods and split the eastern portion of Semarang City, has a length of 14.2 km with an average flow of 288 dm3/s [2]. In general, the estuary waters of East Flood Canal serve as sites for community activities such as residential areas, industrial, fishing, and tourism [3]. Particularly, these fluids are employed in the textile and food industries.…”

Multivariate statistical analysis for sedimentary characteristics in an estuarine environment of the east flood canal river, Semarang

“…The East Canal Flood River is a combination of Kali Banger and Kali Tenggang. The East Canal Flood River has a length of 14.25 km with an average discharge of 295.33 liters/second [1]. As for the East Canal Flood river across the eastern city of Semarang which is densely populated and industrial.…”

“…Many human and industrial activities around the watershed include the textile industry, food factories, and fish auction sites. The amount of human activity around the river will affect the increase in sedimentation processes at the mouth of the river estuary [1].…”

“…Previous research conducted investigated the distribution of sediments of the riverbed using samples of sediment cores in the mouth of the river and deep sea, there are 10 stations that are sampled sediment, based on analysis of Shepard Triangles and tides. The research found that the type of sediment in the mouth of the river is silt and in the deeper areas contained sand [1]. The granulometric and textural analysis is appropriate to recognize and to give fundamental information on sediment dynamics.…”