Comparison of The Chemical Quality of Water and Diversity of Macrozoobenthos on Agricultural and Domestic Areas, A Case Study In Batu City

cahyani cahyani

Abstract


Batu city is located in the upstream of Brantas watershed, the city has an important role in maintaining the quality of the river water. The city has developed into intensive agricultural and residential areas – services, which may reduce the water quality. This research was conducted in two catchment areas with different dominating activities. The aims of this study are to identify differences in water quality between the one in agricultural area and the one in residential area, to identify the effect of the water quality on the diversity of macrozoobenthos, and to identify the relationship between the two. The water and macrozoobenthos samples were taken upstream, middle and downstream of the river. Analysis of water samples use spectrophotometry UV-Vis method and Shannon-Wiener’s formula to calculate diversity of macrozoobenthos. The chemical quality of the water in the catchment area dominated by agricultural activities has a relatively high nitrate and P2O4 compound, and the chemical quality of the water in the catchment area dominated by domestic activities has a relatively high nitrate and nitrite compound. The types of macrozoobenthos found in both areas are relatively similar, consisting of nine families. The abundance of macrozoobenthos in the two catchment areas has a higher abundance of family hydropsychidae. The lowest abundance of macrozoobenthos in the agricultural activities is the family heptageniidae, and in the domestic activities is family lestidae.

 

Keywords: Pollutant compound, Family abundance, Diversity index.


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