Eutrofikasi Dua Situ Bekas Galian Pasir di Desa Cikahuripan Kabupaten Cianjur

Abstract

Situ-situ bekas galian di Desa Cikahuripan hingga saat ini masih merupakan lahan tidur yang belum dikelola dengan baik sedangkan situ tersebut sebagai habitat air tergenang memiliki fungsi ekosistem dan fungsi ekonomi yang cukup potensial (Kattner et al. 2000). Situ yang terbentuk di Desa Cikahuripan telah digunakan sebagai tempat pembuangan limbah rumah tangga atau tempat pencucian kendaraan sehingga situ tersebut telah mendapatkan tekanan antropogenik. Pada perairan yang mendapatkan tekanan dari kegiatan manusia proses eutrofikasi berlangsung lebih cepat sebagai akibat dari peningkatan unsur hara yang memicu peledakan produksi biomassa fitoplankton. Indikasi terjadinya suatu eutrofikasi di ekosistem perairan adalah deplesi oksigen terlarut pada lapisan hipolimnion dan peningkatan produksi biomassa fitoplankton. Bila eutrofikasi dibiarkan tak terkendali maka umur guna perairan akan semakin pendek.

Sandpit lake is an artificial water bodies with small size filled with water because it has penetrated the underground water channels. As a new water body it has the potential to be exploited but without proper management, the usability of this sandpit lake can be short due to eutrophication process. The aims of this research were to describe eutrophication level and to analysis the trophic status of two sandpit lake in Cikahuripan Village wich is Situ no 5 and Situ no 6. The methodology of this research is descriptive analysis with sampling in Mei and July 2010. TRIX calculation results show the trophic status of both sandpit lake has been eutrofik that indicates eutrophication processes take place very quickly. This is supported by the parameters of physics, chemistry and biology both sandpit lake that characterized by high nutrients and productivity as well as the lack of brightness. Although there were observed that sandpit lake is still relatively new waters, but based on trophic status indicates eutrophication process has been going very quickly as a result of anthropogenic activities