International Conference on Rain Water Cistern Systems
Manila , Philipines
- August, 1989
K: Alternative Designs Of Rain Water Cisterns
Rain Water Cistern Systems
In Northeast Brazil And North Yemen
University of Tsukuba
This paper deals with the situation and comparison of the tropical rain water
cistern systems in Northeast Brazil and North Yemen (Yemen Arab Republic), both
of which are located in the tropical arid or semi-arid regions.
Northeast Brazil (NORDESTE) consist of 8 states of Bahia, Sergipe, Alagoas,
Pernambuco, Paraiba, Rio Grande do Norte, Ceara and Piaui. The writer surveys
on natural environments of all states of NORDESTE and Santana do Ipanema located
170 km. to the west of Maseio, the capital of state of Alagoas. Rain water cistern
in Santana do Ipanema in NORDESTE have three types in a village shown in Figs.
3, 4 and 5. All these cisterns have, roofs and water is in a better sanitary condition
for human health, because it does not contain polluted water contaminated by human
and domestic animal, but the water causes fragile teeth.
On the contrary, all the rain water cistern located in the vicinity of San'a,
the capital of North Yemen, are located in the lower part of the villages and
constructed by digging ground surfaces and some are in underground area only.
They are all without roofs and take in water polluted by people and domestic animals.
Consequently, foreigners visiting there cannot drink cistern water.
There are many types in tropical rain water cisterns in the world. We need
to compare and examine these types and to select. the best cistern type from the
viewpoint of sanitation.
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