Freshwater resources availability freshwater consumption and water pollution vary within a year and across year. Freshwater resources availability can also be unevenly distributed. This is happening in worldwide including Blimbing Sub-District in Malang City Indonesia. Water footprint is a concept that can measure consumptive water use and water polluted. Through water footprint sustainability assessment we can quantify human impacts on water resources by comparing the water footprint consumptive water use and water polluted to the water availability. The aim of this study is to assess the water footprint sustainability from environmental perspective in Blimbing Sub-District Malang City. We consider the residential and agricultural rice field as they are the largest part of land use in Blimbing Sub-District. We estimate green rainwater blue surface water and spring and grey water pollution water footprint then compare them with green blue water availability and runoff at monthly level from 2010-2014. The results of this study showed that at average monthly level from 2010-2014 green water footprint of agricultural were still in sustainable condition. Yet the blue water footprint of agricultural exceeded the blue water availability of Bango River and experienced moderate to significant scarcity in four months on average yearly during dry season. Wendit Spring is also in unsustainable condition mainly due to blue water footprint of residential which experienced moderate blue water scarcity for almost every month during 2010-2014. We also found that water pollution level reaches significant and severe level in three months on average yearly over 2010-2014. The results indicated that water footprint of household and agricultural in Blimbing Sub-District violated environmental flow requirements and did not meet water quality standards.
freshwater resources, river basin, sustainability assessment, water availability, water footprint, water scarcity
: Penggunaan dan pemeliharaan tanah
: 333.731 3 Ria w
Source Article of Proceedings
Coverage ITS Community
Rights The 5th Indonesian Regional Science Association (IRSA) International Institute Bali, Indonesia (2015)