Abstract:
Lack of clean water supply, sanitation and hygiene are major causes for the spread of waterborne diseases in a community. This study was conducted, to determine biodiversity of some invertebrates associated with health problems and some of their predators in the stagnant rain water in addition to the quality of drinking water collected from Kosti City. In this study, the quality levels of drinking water (Physical, chemical and the microbial quality), were determined following the standard methods, in addition investigate the presence of some aquatic invertebrates in stagnant rain water. Five sites were selected for sampling drinking water and stagnant rain water during Sept. 2020 and Feb. 2021. The results showed that, during Sept. 2020, some of the physical properties of Kosti drinking water were relatively less in quality than control. pH and bicarbonate (HCO3-) values of some selected sites were not within the standard ranges. Total dissolved solids (TDS), CO3-2, Cl, SO4-2 and K+ data agreed with the standard ranges. pH showed a very strong -ve correlation(-0.99) with TDS. E. coli estimated high in Alaiden samples and low in Al Sug samples. High density of Anopheles larvae were recorded compared to Culex, whereas Aedes larvae were not noticed, unlike algae and snails, which noticed in all sites. The most abundance aquatic predator was the mayfly naiad. For samples collected during Feb. 2021: pH, HCO3-, Hardness, SO4-2, Na+ and Ca++ values were not ranged within the standard ranges. TDS, Cl and K+ data agreed with standard ranges. CO3 show a very strong +ve correlation (0.99) with Na and -ve correlation (-0.98) with HCO3. E. coli was relatively high during winter (Feb.) in comparison to rainy season (Sept.). Low density of Anopheles larvae were recorded compared to Culex. Aedes larvae and mosquitoes pupa in addition to Mayfly naiad were not noticed in any of the selected sites. The most abundance aquatic predator was the water beetle followed by dragonfly naiad. The study recommends to evaluate the quality of the drinking water, and this should be routine work.
