calculate the following. The runoff ratio for the entire land surface of the ear

Question

calculate the following. The runoff ratio for the entire land surface of the earth The average residence time of water in the atmosphere above the oceans Write down three different water balance equations that you can formulate based on this figure, assuming you can ignore change in storage terms. For two of your above equations, add the relevant change in storage terms. Be explicit about which storages are included in these terms. For one of these two equations under d), describe a situation in which the change in storage cannot be ignored. a) b) c) d) e)

Explanation / Answer

Answer:

a) Ans: Runoff Ratio over land = (Runoff / precipitation) = 45.5 /111 = 0.41

b) Ans: In atmosphere over ocean, water vapor storeage = 10, total precipitation = 391

then, residence time = 10/391 yr = 9.33 days

c) Water Balance equation for Ocean, P = Q + E (P=precipitation, Q=Run-off, E=evapotranspiration )

P(391) = E(436.5) - Q(45.5)

Equation for land,

(Grassland)P+(Wetkand)P+(Forest)P+(lake)P+(Cropland)P+(other)P = (Grassland)E+(Wetkand)E+(Forest)E+(lake)E+(Cropland)E+(other)E +Q

Equation for atmosphere,

(Ocean)P + (Land)P = (Ocean)E + (Land)E

d) Cosidering the change in storage S, we can write,

For ocean, P = E - Q + S

For land,

(Grassland)P+(Wetkand)P+(Forest)P+(lake)P+(Cropland)P+(other)P = (Grassland)E+(Wetkand)E+(Forest)E+(lake)E+(Cropland)E+(other)E +Q +S

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.