STUDY THEME 8: Elements of First Order Kinetics ~ Application to BOD and Rivers 13. The velocity of the water in a river soon after a strong storm event. (choose 2) ( 8 pts ) A. the velocity remains the same unless solids payload increases in which case velocity decreases B. increases drastically C. increases marginally such that it can be considered unaffected during calculations D. is only a function of the flow rate Q E. decreases as the cross sectional area of flow increases F. you can tell the velocity of the river by how wide the river is 15. Explain why removal rates for both conservative and non-conservative substances in natural water bodies is assumed to follow first-order decay rate kinetics. Indicate the risks posed by the over-reliance on the first-order kinetic model in a broad range of scenarios. ( 8 pts )