"Bangladesh located in the same zone. The Satkhira district averages nearly 1,710 mm rainfall per year...minimum catchment area was assumed to be 6 m2 and storage tank of 2000 liter capacity...approximate cost was assumed to be $171 for building and operation of the whole system."
"a family consisting of five members having water demand of 5 l/capita/day for 3 months (for only drinking and cooking purpose) was considered...dry spell period in the region is around 45 days...So, sixty days demand is 2000 liter...storage tank is the most expensive component of rainwater harvesting system...plastic tanks are cheap...To reduce total coliform from the stored rainwater, locally made sand filter can be used." https://pubs.sciepub.com/ajwr/2/6/2/index.html
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