UTILIZING OF GREEN SPACE MODEL BEARING RIVER WITH THE RAIN GARDEN METHOD

Rapid development in urban areas demands a change in the function of green open land into residential buildings, offices, and schools. The reduction in green open land then results in decreased absorption of rainwater into the ground thereby increasing runoff. One of the environmental engineering that can be done to improve the ability of land to absorb water is the creation of rain gardens. Rain garden is a shallow basin that is able to accommodate rainwater runoff from the surrounding area then absorbs it into the ground. The soil under the park is modified with various layers of filtration media, which consist of mulch, mixing soil, sand, and gravel. The layer is useful for removing pollutants that are in the form of solids or that are dissolved in rain water. The purpose of this study is to design a model for the utilization of green open spaces along the river banks with the rain garden method. The study was conducted on a green open space along the river. Data collection is done by observation and measurement in the field. From the results of the analysis obtained that the application of the riverbank open space by the Rain Garden method is the collection of runoff water from the roof of the house and seep naturally into the soil. The basin shape of the riverbank's open space by the Rain Garden method helps in collecting water and improving its filter properties. The garden design allows absorption of runoff water and filtering of pollutants. Open space along the river banks with the Rain Garden method provides a way to use and optimize every rain that falls by collecting runoff water, storing it, then it will be filtered and absorbed by the soil before entering the river side