Acoastal watershed has a total surface area of 561 km2. the land area is 552 km2 and the area of the rivers is 9 km2. a water budget for the watershed has the following long-term average annual values (all measured or estimated to the nearest integer): 120] precipitation: 73 cm evapotranspiration: 46 cm baseflow: 11 cm stream flow: 19 cm unoff: 8 cm ocean seepage: 8 cm

water budget groundwater reservoir = 57 cm

Explanation:

given data

total surface area =  561 km²

land area =  552 km²

solution

we know that here budget equation that is amount of water flows in and out of the system

mean in flow - outflow

so

here inflow of water occurs during precipitation

so

water budget groundwater reservoir is = In flow - Out flow

so

water budget groundwater reservoir =  73 + 11 + 19 + 8  - ( 46 + 8 )

water budget groundwater reservoir = 57 cm