The type of land and topography that will have the highest runoff coefficient is Gravel.
The Runoff coefficient may be defined as the proportion of the amount of water that is not absorbed by the surface to the total amount of water that tumbles during a rainstorm.
The runoff coefficient is higher for those areas which have low infiltration and high runoff. Forests, Wetlands, and Grasslands have low runoff coefficients.
Therefore, the type of land and topography that will have the highest runoff coefficient is Gravel.
To learn more about the Runoff coefficients, refer to the link:
https://brainly.com/question/25819710
#SPJ1