| Abstrakt: |
The city of Yogyakarta faces the problem of urbanization, an increase in population, economic activity and changes in land use. Settlements and water are basic needs that must be fulfilled. Transfer of land functions into settlements will reduce water catchment areas and trigger floods and droughts. This study aims to analyze the balance between the availability and needs of green open space in supporting the reliability of water supply in the city of Yogyakarta. The method used in this study is the analysis of the reliability of water resources which is calculated based on the adequacy of green open space and population. The results showed that the total green open space of the city of Yogyakarta is 301.76 ha or 9.28% of the total area of 3,250 ha. The existing population is 413,705 people with water demands of 26.890.830,98 m³/year, existing water supply is 16.847.178 m³/year, and groundwater potential is 9.000.000 m3/year, so there is still a water shortage of 1.043.653 m³/year. To overcome the shortage of water, based on the population and water demands of the city of Yogyakarta requires a green open space of 287,17 ha or 8,84%. The strategy for developing green open spaces in Yogyakarta is focused on improving the quality of existing green open spaces, as well as developing public green open spaces and green lines. In addition, rainwater harvesting techniques as an alternative to raw water through reservoirs for direct use and absorption of rainwater to the ground as groundwater conservation. [ABSTRACT FROM AUTHOR] |
