Answered: How do theoretical models of water…

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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Storm sewer system is to be provided to drain storm water to protect urban areas from flooding after episodes of rainfall. Storm sewer layout along with the contributing areas drained in specific sewer lines is shown in Figure A2= 26 ha SS1 SS2 SS3 SS4 SS5 C2=0.56 A2=16 ha C2=0.75 A6= 26 ha C6=0.65 MH1 MH3 MH5 MH6 MH2 MH4 Main Sewer 56 51 51 66 61 Length of Sewer (m) A1=11 ha C1=0.60 A3= 26 ha C3=0.70 A5= 31 ha C5=0.70 MH1 MH1 MH2 MH3 MH4 MHS MH2 MH3 MH4 MH5 MH6 GE=142 m MH2 MH3 MH4 MH5 MH6 GE=140.9 m Design the storm sewer system for "gravity flow" using the data given in Table Q1 assuming that the entry time to the pipe is the same for all sections and is equal to 6 min. All pipes are circular and made of concrete. All areas are in hectares. Sewer Name Head of run End of run GE=140 m GE=139.1 m GE=138.2 m GE=137.0 m
Subject: irrigation engineering a) Define irrigation and what is perennial and lift irrigation? b) Whats the difference between Rabi and Kharif crops?
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ZAV . O e docs.google.com What is the most important step in the process of soil reclamation?* O Lowering the ground water level O Raise the ground water level O Not to lower or raise the level of ground water Used to control groundwater in the soil* O Shallow surface drains O Deep open drains O Other than The distance Deep open drains between * O (750 - 800 ) m O (125 - 250 ) m 1000 - 1250) m The velocity of flow in drain should not be * O Scouring O Silting occurs O Scouring and silting occurs O Not one of them Field capacity depends on * O Soil permeability O Moisture content O Both of them Not one of them O O O O
3. Are physical models applicable in hydrological studies? State why, where and how they are used.
Hydrology 1. What is watershed simulation? Explain briefly the various stages in the simulation study. 2. What is a flow-duration curve? What information can be gathered from a study of the flow duration curve of a stream at a site
What is the long-term runoff from a watershed of 225 km2 where Precipitation = 2100 mm/y, Groundwater inputs = 110 mm/yr, Groundwater outputs = 110 mm/y, Evapotranspiration = 1650 mm/yr? 3.211 3.21 3.2 3. None of the answers offered
Problem 3 The table below contains the data for a one-hour unit hydrograph. Time Q (hr) (cfs/in) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 0 145 246 359 979 432 246 134 65 32 0 (a) Determine the area of the watershed to which this unit hydrograph corresponds. Report your answer in acres. (b) Assume a very intense 3-hour storm occurs shortly after a rainy period, so the ground is very saturated. The runoff from the first one-hour interval of the storm totals 0.5 in., the runoff from the second one-hour interval is 2.5 in, and the runoff from the third one-hour interval totals 1.7 in. The baseflow during and after the storm is 80 cfs. Derive the storm hydrograph for this 3-hour storm. table that clearly indicates how you used the unit hydrograph, sample calculations Provide a with sufficient explanation, explanatory sketches, and a graph of the storm hydrograph. (c) Determine the peak discharge that will occur in the river if this 3-hour storm occurs.
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A rainstorm over a levee with an area of (500) hectares, as its details are shown in the table below. If the volume of direct surface runoff coming out of the levee is Mm3 (0.340), calculate an index for the rainstorm, and the increase in the falling rain? Time from start (hr) Cumulative rainfall (cm) 0 0 2 4 0.8 2.6 6 4.1 8 7.3 10 12 10.8 11.8. 14 12.4 16 12.6
Runoff is the portion of rainfall which flows through rivers or streams. Thereare several factors that affect the production of runoff such as precipitationcharacteristic, shape and size of the catchment, topography, meteorologicalcharacteristics and others. Choose one factor and discuss it in detail with helpof diagram how it affects runoff production.
Example 4. Following are the ordinates of a storm hydrograph of a river draining a catchment area of 423 km² due to a 6-h isolated storm. Derive the ordinates o f a 6-h unit hydrograph for the catchment Time from start of storm (h) -6 0 6 12 18 24 30 36 42 48 Discharge (m³/s) 10 10 30 87.5 115.5 102.5 85.0 71.0 59.0 47.5 Time from start of storm (h) 54 60 66 72 78 84 90 96 102 Discharge (m³/s) 39.0 31.5 26.0 21.5 17.5 15.0 12.5 12.0 12.0

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How do theoretical models of water resource management and allocation inform sustainable irrigation practices in agriculture and urban landscaping