抄録
Nowadays, with the development of sciences and technology,human cannot only save the water but also treat the polluted water for using. Therefore they forget using rainwater andbe wasting this valuable natural resource. Recent years, the population density is rising fast, 2,126.05 ppl/km2 in Hanoi,the land use areas are also increasing, causing some concerned issues. While the urbanization problem is fast developing,the drainage systems are becoming old, small and breaking. Moreover, because of climate change, there are moreextreme weathers such as big storms, Tsunami, flood, etc., causing the damage to human society, activities and economy.On the other hand, because of population growth, rising demand for water led to high water shortages in some big citiessuch as Hanoi, Ho Chi Minh City. In this paper, a study about Rainwater Harvesting Tank for reusing rainwater and tourban flood mitigation is proposed.
