Catur Retnaningdyah

The variations of physical and chemical water quality in Coban Rondo waterfall, Malang Indonesia

Coban Rondo waterfall is threated to have been polluted due to the tourism activity. Analysis of the water quality is essential to provide the basis for judging the suitability of water for its designated uses and improving its conditions. This study aims to analyze the water physical and chemical parameters of Coban Rondo waterfall in Pujon, Malang Indonesia. Three locations including upstream, waterfall, and downstream were the sources of the water samples taken during the rainy season. The study analyzes 12 water quality parameters consisting of 5 physical parameters and 7 chemical parameters. Using ANOVA, cluster analyses, and Biplot to analyze the water quality, the research results indicated that water and air temperatures were high in the upstream. The value of pH from 6.9 to 7.4, DO from 8 to 11 mg/L, conductivity from 0.106-0.112dS/m, turbidity 3.3 NTU to 7.6 NTU, water debit4 x 105 L/s and total phosphate from 0.5to 0.07 mg/L were higher in the downstream area, while the concentration of nitrate from 5 to 30 mg/L, orthophosphate 1.0 to 1.4 mg/L, COD from 14 to 22 mg/Land BOD 10.8 to 15.6mg/L was highest in the upstream. It indicates that the human activity in Coban Rondo has affected the water quality. Based on Indonesia government regulation No. 82/2001, the water in Coban Rondo was still suitable for irrigation and tourism (Class II), except BOD level.Coban Rondo waterfall is threated to have been polluted due to the tourism activity. Analysis of the water quality is essential to provide the basis for judging the suitability of water for its designated uses and improving its conditions. This study aims to analyze the water physical and chemical parameters of Coban Rondo waterfall in Pujon, Malang Indonesia. Three locations including upstream, waterfall, and downstream were the sources of the water samples taken during the rainy season. The study analyzes 12 water quality parameters consisting of 5 physical parameters and 7 chemical parameters. Using ANOVA, cluster analyses, and Biplot to analyze the water quality, the research results indicated that water and air temperatures were high in the upstream. The value of pH from 6.9 to 7.4, DO from 8 to 11 mg/L, conductivity from 0.106-0.112dS/m, turbidity 3.3 NTU to 7.6 NTU, water debit4 x 105 L/s and total phosphate from 0.5to 0.07 mg/L were higher in the downstream area, while the concentration of nitrate...

The effectiveness of leachate remediation in the implementation of unvegetated constructed wetland

The objective of this research was to examine the effectiveness of leachate remediation that is performed through the implementation of a free water surface (FWS) unvegetated constructed wetland system (UCW). The abovementioned remediation was conducted in a glass house with complete randomized design and using a small-scale UCW referred to as UCW reactor. The reactor was designed to replicate a large-scale FWS UCW and was filled with sand and gravel in a 3:5 ratio. The measurements of the leachate quality throughout the remediation experiment were based on hydraulic retention time (HRT) calculation and carried out on the 1st, 5th, 10th, 15th, 21th and 30th days. Subsequently, the resulted homogenous measurements were analyzed using One-way ANOVA while the non-homogenous ones were analyzed using the Brown-Forsythe test. For further analyses on the resulted statistical data, Turkey-HSD or Games Howell test and Euclidean-distance clustering and biplot were applied. The data representing value decreases in t...