Abstract:
For the existence of life, water is indispensible natural resource, which is essential and is a
basic human entity. Groundwater is one of the major sources of drinking water all over the
world. This work was done in an area called Robe district, with the objective of the
evaluation of groundwater quality in line with water demand and supply and its suitability
for domestic uses. Groundwater samples were recollected from Eight (8) ground water
samples site and chemically analyzed for major physicochemical parameter. Physical and
chemical parameters of groundwater were determined. These parameters were used to assess
the suitability of groundwater for domestic purpose by comparing with the WHO and
Ethiopian standard guideline. Water type of the study area was determined by using Aquachem2012.1modaelsoftware which develops piper diagram. The result of the finding
indicated that; all water samples had pH value less than eight which is in WHO standard
guide line except in two sample site. The Electric Conductivity of sampled water was below
WHO standard guide line value (250 μS /cm).TDS of water was below WHO the guide line
value (<500 mg/L) which is fine while Temperature of all sampled water is above WHO
guide line value. only two water samples had Iron concentration above WHO guide line
value (0.3 mg/L) with maximum concentration of (o.78mg/L) in hand dug well of Abo Ali
kebele. Two water samples exhibited high concentration of Manganese above Ethiopian
guideline value (0.5 mg/L). The hydrogeological facies of water in the study area is
dominated by alkaline earth metals. Generally water type of area is Na-Ca-HCO3 in two
kebeles (Ataba Robe and HabeDangasela) and the others are different in water type. All
samples were had total coli forms and fecal coli forms beyond WHO guide line and
dangerous for domestic use. The result also showed that, water demand and supply of the
household is not comparable, in which the demand was greater than the proposed supply.
Aquachem and Microsoft excel software was used to analyze and present the groundwater
data. In general, to complete this study, it requires five months starting from May, 2017to the
end of September.
