Key Factors For Regional Urban Eco-Drainage Evaluation
During rainy season, people are often experiencing the effects of flood and spatial puddles of water which disturb their activities and inflict both moral and financial loss. Those experiences often result in a desperate urge to be free from flood and spatial puddles of water. Little do they know, that by doing so, it will lead to a drought in the future, because water from the flood and spatial puddles will not be absorbed deeper into the ground. Peoplewill also face a rapid land subsidence as a result of it.Urban eco-drainage is not only functioned to drain the surface water runoff, but also to manage the surface water runoff in order to minimize problems caused byspatial puddles of water, flood, and drought, as well as to be useful for environmental sustainability. Guidelines and researches on urban drainage performance evaluation have been written and conducted several times, but no guideline or handbook is yet to be written on how to evaluate an urban drainage system in an area, in terms of whether that drainage system is suitable with concept of eco-drainage system. The early stage on this research is focused on building a research question, which is to determine key factors that can be used to evaluate and measure an urban drainage system to meet the requirements of an urban eco-drainage concept.Based on the available researches and handbooks on evaluation of urban drainage system, a review was conducted to get all factors and indicators which are allegedly able to be used to measure suitability of urban drainage system with a concept of urban eco-drainage system.The key factors that allegedly can describe whether an urban drainage in an area has been built in accordance with ecological concept, are: (1) technical management, and (2) non-technical management. Technical management consists of five key factors, such as (1)infiltration system, (2) drainage channel system, (3) complementary building systems, (4) storage system and (5) water pump system. Non-technical management consists of two key factors, such as (1) government participation and (2) community role. There are alsoseveral aspects that need to be considered in non-technical management, such as institutional, regulation, financial, socio-cultural, and environmental.
Key words- urban eco-drainage, key factors, key indicators.