Keterkaitan Kegiatan Keramba Jaring Apung (KJA) Dengan Tingkat Kesuburan di Waduk Cirata, Jawa Barat

Abstract

Trophic states monitoring in Cirata Reservoir is an important thing in sustainable management for hydropower plan and floating net cage. The purpose of this research is to analyze trophic states of Cirata Reservoir based on physical, chemical, and biological parameters using some index related to existence of floating net cage in Cirata Reservoir. Trophic states were calculated by some index which is index Nygaard (In), Trophic State Index (TSI), Trophic Index (TRIX), Trophic Level Index (TLI), and Delphi Method (R[DM]). Cluster analysis and principal component analysis indicated that the station group consist of Station KJA that influenced by dissolved oxygen, temperature, Secchi disk depth, and chlorophyll-a, and Station inlet of Citarum River that influenced by total dissolved solid and total phosphate. The results show that the values of In, TSI, TRIX, TLI and R[DM] of Station KJA and inlet of Citarum River are indicated as hypereutrofic. All of the indexs are still relevant to describe the trophic states of Cirata Reservoir.