Q1:The table below represents the annual rainfall rate (mm) for each station A with the average of eight other stations, check thehomogeneity of the records for station A with the other stations and then correct the information using the methodThe double cumulative curve, explaining:Average 8stations14001140650646350590490400390570377653787410588Station 81244999573596375635497386438.568356685825426612the year196519661967196819691970197119721973197419751976197719781979A In what year does a change in the fall rate system occur?b- What are the years that need to adjust readings? T. Whatis the value of the correction factor for heterogeneous years?Average 8stations780660110520540800540490560575480600580950770station.67657895462472699479431493503415531504828679the year195019511952195319541955195619571958195919601961196219631964

Q1: The table below represents the annual rainfall rate (mm) for each station A with the average of eight other stations, check the homogeneity of the records for station A with the other stations and then correct the information using the method The double cumulative curve, explaining: Average 8 CON A In what year does a change in the fall rate system occur? b- What are the years that need to adjust readings? T. What is the value of the correction factor for heterogeneous years? Average 8 tation

Q1: The table below represents the annual rainfall rate (mm) for each station A with the average of eight other stations, check the homogeneity of the records for station A with the other stations and then correct the information using the method The double cumulative curve, explaining: Average 8 CON A In what year does a change in the fall rate system occur? b- What are the years that need to adjust readings? T. What is the value of the correction factor for heterogeneous years? Average 8 tation

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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2) Construct a rainfall hyetograph (rainfall intensity, in mm/hr, versus time, in minutes) if the total rain in Question 1 above has the following temporal distribution (Table 1). Sketch the hyetograph. Table 1: Temporal Distribution Time (min) 0-5 5-10 10-15 15-20 20-25 25-30 % rainfall per period 12.5 12.5 38 13.5 13.5 10
A catchment has 6 existing rain gauges. The mean annual rainfalls recorded by these gauges in a given year are listed in the table below. What should be the optimum number of rain gauge stations in the catchment area with permissible error 10%? 5 6 Rain gauge 1 2 3 4 Annual rainfall (cm) 82.6 102.9 180.3 110.3 98.8 136.7
There are five (5) rain gauges dispersed throughout a watershed. During a storm event, four (4) of the rain gauges were working and collected the rainfall data given in the table below along with the annual average precipitation for each rain gauge. Determine the missing rainfall amount for the broken rain gauge using the quadrant (inverse distance) method, and the normal ratio. Station Rainfall (mm) Annual (mm) AX (m) ΔΥ (m) Area (m²) A 42 500 10 25 1500 В 30 480 15 30 2000 50 558 24 30 830 D 526 500 -- E 35 590 19 1200 40
2.6 Represent the annual rainfall data of station A given below as a bar chart with time in chronological order. If the annual rainfall less than 75% of long-term mean is taken to signify meteorological drought, identify the drought years and suitably display the same in the bar chart. Year 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 Annual rain 760 750 427 380 480 620 550 640 624 500 (mm) Year 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 Annual rain 400 (mm) 356 700 580 520 102 525 900 600 400
1) Rainfall data of 4 stations in the same region are given in Table. a) Estimate the missing data of the station Y by weighted arithmetic mean method b) Test the homogeneity of the data in station (Y) using the data of stations (X1, X2 and X3) with double mass curve method. Year X1 2010 811 2011 881 2012 941 2013 751 2014 741 2015 1021 2016 901 2017 1991 2018 1241 2019 1011 X2 691 771 811 691 671 891 801 1031 1151 931 X3 641 701 761 611 576 801 741 911 1001 821 200 250 300 600 ? 825 730 950 1040 800
Given the same example and the data listed in the table, calculate the average rainfall using Theissen Method. 488 (2) Area enclosing precipitation (mm) station (sq.km) 18 311 282 311 52 238 212 197 1621 -371 (1) Station observed (3) % Total area -68.3 114.3 16.5 1 37.1 48.8 68.3 39.1 19 18 19 127.0 3 15 13 12 100 75.7 127.0 114.3 Total basin area
Eight rainguage stations are installed in a catchment and they recorded rainfalls of certain magnitudes. The mean value of rainfalls is 120 cm and standard deviation is 35 cm. The percentage of accuracy associated in the estimation of average rainfall is
The annual rainfall data at station Axyz and the average annual rainfall values of the neighboring stations are randomly listed below. Using the Double Mass Method, test the consistency of the given data at station Axyz and correct if any discrepancy occurs. What is the estimated Mean Value of Annual Precipitation at Station Axyz? You may use Microsoft Excel. Average Rainfall of the group Annual Rainfall at Year station Axyz 2012 365 320 2017 415 436 2011 471 446 2002 397 462 2013 475 468 1993 387 469 2003 422 491 2005 398 520 2004 454 530 1995 472 530 1998 475 536 2016 546 548 1997 477 578 1994 581 596 2001 547 619 2020 641 625 1992 547 649 2014 641 655 2000 589 656 2009 598 675 1999 630 689 2015 758 710 2019 763 725 2018 758 727 2021 857 833 2006 743 834 1996 812 880 2010 874 924 2008 574 1215 2007 634 1910
A watershed covering 28.16 mi2 has a system of seven rainfall gages, as shown on the map in the Figure. Using the total storm rainfall depths given in the accompanying table, determine the average rainfall over the watershed using: (a) arithmetic averaging and (b) the Thiessen polygon method. Gage ABCDEFG А с P₁ (in.) 5.13 6.74 9.00 6.01 5.56 4.98 4.55 A₁ (mi²) 1.74 6.70 1.77 13.02 0.83 2.68 1.42 28.16 B. . E 1 in. = 3.9 mi .F . G
Q3) A river basin contains 6 rainfall stations with the annual data given in the table below. How many rainfall stations should be added to the basin to reach an error percent of 8%? Station A B F Annual Rainfall 230 400 301 268 196 351 depth (mm)
(b) Accumulated rainfall on seven (7) successive hours in a catchment were measured as 7, 15, 60, 81.5, 97.6, 120 and 120 cm. If the total runoff at the outlet was 15 cm, quantify the p-index. The annual rainfall record for station X and the average annual rainfall for three (3) nearby stations are shown in TABLE Q5(c). Test the uniformity of rainfall records for station X using double mass curve method, identify which year the inconsistency in the data starts and the correction factor. (c)
:A-Explain the following briefly Two only. 1-The methods of determination of average precipitation over an area. 2-What are the factors affecting flood Hydrograph? 3-What are the basic assumptions for deriving the unconfined aquifer equations? B: The normal annual precipitation of five rain gauges stations P, Q, R, S and T are 120, 100, 80, 110, and 140 cm respectively. During a particular storm the precipitation recorded by stations P, Q, R, and S are 15, 10, 7, and 11 respectively, the instrument at station T was inoperative during the storm. Estimate the rainfall at station T during the storm.