Problem 3.1. Compute the daily evaporation from water surface if the wind speed is 32 km/h (20mph) at 0.15 m height, water and air temperature are both 29 °C (80 °F) and the relative humidity of air is 50 percent. Atmospheric pressure is 757 mm Hg (29.8 in. Hg). How would your computed value compare with evaporation from dry soil surface? From a class A weather Bureau pan?

Paragraph Problem 1: A pipe is laid horizontally and filled with soil, with its open end being saturated. With the given data, solve for its infiltration in 36mins if the soil column had been initially placed upright with its upper surface saturated. Area of the pipe's cross section = 212.6cm2 Infiltrated by 2126cm? of water after 26mins Hydraulic conductivity is 0.001cm/s (Final answer should be in 4 decimal places.) Problem 2: With the given data, solve for the infiltration rate and cumulative infiltration after 360mins on a sandy clay soil. Assume water is ponded to a small but negligible depth on the surface. Moisture Content of the soil = 34.5% Residual Moisture Content of the soil = 26% (Final answers should be in 4 decimal places.) The table will be provided in page 2 Problem 3: Using the data from Problem 2. What is its ponding time if: a) Intensity of rainfall is 0.000126cm/s. b) Intensity of rainfall is 5.8344cm/d. (Final answers should be in 4 decimal places.) Problem 4:…

How fast do small water droplets of 0.93 μm (93 x 10% m) diameter fall through the air under standard sea-level conditions? Assume the drops do not evaporate. Repeat the problem for standard conditions at 5000-m altitude.

Infiltration Question 4: Calculate the volume of water (Mm³) evaporated from a catchment of an area of 60 hectares per year if saturation vapor pressure is 80mm of Hg and relative humidity is 70%. The velocity of wind at 25 m above the ground level is 21.5 km/hr. Take K = 0.4.