Figure 4. Level of DO, BOD, & COD in Selected Sample sites of Upstream Koka

From

The Pollution Status of Awash River Basin (Ethiopia) Using Descriptive Statistical Techniques

Yosef Abebe Yimer, Abraha Geberkidan

American Journal of Water Resources. 2020, 8(2), 56-68 doi:10.12691/ajwr-8-2-2