Answered: If the inflow is less than evaporation…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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As the depth chnges negatively means decreasing , can you please explain what are some measures to reduce the evaporation as to reduce the decreasing depth
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Water flows in a horizontal, rectangular channel initially 10 feet wide and 2 feet deep. The initial velocity is 6 ft/s. This flow encounters downstream a simultaneous downward step and constriction. No energy losses are associated with these changes in channel configuration. a. What is the specific discharge, q: i. Upstream (for w= 10 feet)? ii. Downstream (for w = 6 feet)? b. What specific energy, E, is associated with the flow as initially specified (at the upstream location)? c. What is the minimum energy needed to pass the full discharge at the downstream location? d. What is the height (Az) of the smallest downward step necessary for the upstream flow conditions to remain as specified?
Ex 12-6: agricultural land subjected to heavy rainfall of 10 days duration which caused groundwater recharge of 3mm/day. This water was drained by perforated pipes 20cm diameter laid at 2m depth below soil surface. If the depth of impervious layer 8m .find the spacing of drains to maintain the permissible groundwater table 1.5 m below soil surface. The hydraulic conductivity 0.5 m/day. Use any available equations (Hooghoudt Kirkham and Dagan)
Q1)A storm water retention pond following a 4-hour rainfall event with 2-in accumulation. The contributing watershed area is 20 acres, of which 2 acres in the pond. The pond has a rectangular geometry. The initial depth of water in the pond is 5 ft. The soil of the watershed on average is pasture type in good condition. The pond drains by infiltration through the bottom (fully effective) and sides of the pond at the rate of 2 in/hr. The effective area for infiltration through the sides of the pond is 2000 ft. What is the depth of water in the pond 12 hr after rainfall ends? Assume runoff has ended by this time?
uestion No.3 catchment has a net area of 90 ha. After one vear, groundwater table is nonitored, and a sie change is detected. During this year, the average monthly precipitation and evapotranspiration were 20mm and 5mm respectively. In a certain location through the watershed, water dam (Assuming that the lake water depth is 4.0m and evaporation is neglected). Answer Reservoir area
Determine the required area (in ft ) of a bioretention basin to service runoff from a shopping complex with 4 .2 acres of paved parking, 1.1 acre of sidewalks, 0.5 acre of landscaping. The 24-hr design storm is 1 inch. Use the empirical coefficients in Small Storm Hydrology method. There is no underdrain pipe for the bioretention basin. Use the following guidelines for the design: Ponding depth = 12 inch Media bed: 36 inches deep, porosity = 0.30 Gravel bed: 24 inches deep, porosity = 0.36
Figure Q1(d) shows a layer of soil in a tank with upward seepage. Given the H1 = 1.5 m, H2 =2.5 m, h = 1.5 m, ysat = 18.6 kN/m³. If the hydraulic conductivity of soil, k = 0.13 cm/s; (i) Compute the upward seepage force per unit volume of soil. (ii) Determine the rate of upward seepage of water if the area of tank is 0.52 m? in m³ /min.

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If the inflow is less than evaporation then the following will occur except a. open lake b. closed lake c. evaporation occurs d. occurs ephemeral