Adrainage basin bordering the sea has an area of 7500 km2 . the average precipitation for this drainage basin is 900 mm year-1 . the average surface water flow at the outlet of the drainage basin equals 22.5 × 108 m3 year-1 . the average groundwater flow to the sea is 100 mm year-1 . the averages are determined for 30 hydrological years. determine the average actual evaporation in mm year-1 and m3 year-1.

Explanation:

Given data:

Basin Area = 7500 km^2

average precipitation

average surface flow

average ground flow

total time period for averages = 30 hydrological year

Volume = height * area ,

here, height of precipitation

total precipitation over the surface

volume of flow of Groundwater to sea

Average surface flow

The evaporation volume is given as

* Precipitation = Evaporation + surface  flow + groundwater flow.

therefore, we have

Evaporation = Precipitation - (surface water flow + groundwater flow)

putting all value in above equation to get evaporation value

Evaporation

obtained height of water by dividing above calculated volume of evaporation by total area

the correct answers are:

a - pacific plate;

it is the biggest oceanic tectonic plate. surrounded on all sides by continental tectonic plates, it is submerging and gradually becoming smaller and smaller.

b - north american plate;

huge continental plate, occupying big portion of the northern hemisphere.

c -eurasian plate;

alongside the north american plate, it is one of the two dominant continental plates in the northern hemisphere.

d - indian plate;

a small continental plate, that has been part of gondwanaland initially, but after the break up of it, moved towards northeast and pushed into the eurasian plate that was once part of laurasia.