The zonation of cimandiri estuary based on sea surface salinity from sentinel-2 imagery and its relation with the catching spots distribution of anguilla spp. larvae

Abstract

Estuary zone is a transition zone between river environment and marine environment. The meeting between river and sea in the estuary zone causes a mixture of fresh water that has a low salinity value and sea water that has a high salinity value. The meeting of both causes the value of salinity in the estuary zone to fluctuate. This makes the estuary region inhabited by various biota. This study focused on Cimandiri Estuary, where Cimandiri Estuary is a catching area for eel larvae (Anguilla spp.). Cimandiri Estuary zonation mapping in this study using Sentinel-2 imagery. In addition to mapping the estuary zone, this study also aims to analyze the relationship between the catch of eel fish larvae with the level of salinity in the wet and dry months. Estuary zone mapping is done by applying the Cilamaya Algorithm to the Sentinel-2 image to get the distribution of surface salinity values. In wet months where the amount of rainfall is high, the value of salinity and catch will decrease. But on the contrary in the dry months where rainfall is low, the salinity value and catch of eel fish larvae will increase.