Trophic State of Cibanten Watershed

Muta Ali Khalifa,Forcep Rio Indaryanto

doi:10.33512/jpk.v8i2.6659

Abstract

Cibanten watershed upstream is from Karang Mount (one of that is shallow lake Cibanten water springs), flow in Serang City and the downstream at Banten Bay. From upstream until downstream, Cibanten watershed used by various anthropogenic activities where potentially to increasing trophic state of the waters. This research aimed to evaluate trophic state of Cibanten watershed. Research conducted at April – Mei 2018. Water sample took and measured at three different location, upstream (code: Hu), Central (code: T) and downstream (code: Hi). Water parameters where in-situ measurement was water depth, temperature, secchi depth, water colour, pH, dissolved oxygen and salinity (special for downstream). Water sample analysed at Aquaculture Laboratory of UNTIRTA, the water parameter was phosphate and chlorophyll-a. Trophic state of Cibanten watershed analysed with Trophic State Index (TSI). The result from upstream of Cibanten watershed categorized as mesotrophic, with maximum secchi depth until water bottom and existed some water plant. In the central and downstream of Cibanten watershed categorized as light eutrophic. The significant different between upstream, central and downstream of Cibanten watershed is secchi depth. Low secchi depth at central and downstream due to water turbidity, shown by water colour is yellowbrown that assumed come from suspended solid contents.

Highlights

Cibanten watershed upstream is from Karang Mount, flow in Serang City and the downstream at Banten Bay
Cibanten watershed used by various anthropogenic activities where potentially to increasing trophic state of the waters
Water sample analysed at Aquaculture Laboratory of UNTIRTA, the water parameter was phosphate and chlorophyll-a

Summary

METODE PENELITIAN

Penelitian dilakukan pada bulan April – Mei 2018, dengan pengambilan sampel air dilakukan sebanyak satu kali pada tiga lokasi yang berbeda. Lokasi 1 pada bagian hulu (kode: Hu) DAS Cibanten (Situ Cibanten) di Desa Sukabares, Kecamatan Ciomas, Kabupaten Serang; Lokasi 2 pada bagian tengah (Kode; T) DAS Cibanten di Desa Cipare, Kecamatan Serang, Kota Serang; dan Lokasi 3 pada bagian hilir (Kode: Hi) DAS Cibanten di Desa Banten, Kecamatan Kasemen, Kota Serang. Setiap lokasi terdapat dua stasiun pengambilan sampel air yang berfungsi sebagai ulangan. Lokasi pengambilan sampel disajikan pada Gambar 1. Parameter perairan yang diukur dari masing-masing lokasi adalah kedalaman, suhu, kecerahan, warna perairan, pH, oksigen terlarut (DO) dan salinitas (khusus lokasi hilir sungai). Sampel air dianalisis di Laboratorium Budidaya Perairan, Fakultas Pertanian. Parameter yang dianalisis adalah fosfat dan kandungan klorofil. Rincian metode pengukuran dan analisis terhadap parameter perairan DAS Cibanten disajikan pada Tabel 1

Tongkat skala DO Meter Secchi Disk Visual pH Meter DO meter

Kecoklatan Kecoklatan

Eutrofik Eutrofik

KESIMPULAN DAN SARAN

DAFTAR PUSTAKA