MODELING OF CONSTRUCTED WETLAND FOR INCREASING THE SURFACE WATER QUALITY BY USING WATER SENSITIVE URBAN DESIGN (WSUD)

This study intended to apply the constructed wetland for improving the water quality of the surface run-off mainly the river water of Tukad Badung. The constructed wetland consisted of four combined types such as 1) the sub-surface model without the vegetation and the surface with the combination of the sweet flag water lily vegetation; 2) the sub-surface model with the sweet flag vegetation and the surface with the water lily vegetation; 3) the sub-surface model without the vegetation and the surface with the water lily vegetation; and 4) the surface with the sweet flag vegetation and the surface with the water lily vegetation. The methodology uses the Water Sensitive Urban Design (WSUD). The result showed that the physical model-4 produced the optimal result and has the best process result of the pollutant decomposition. The result is hoped to give an input to the government to develop the constructed wetland for increasing the water quality.