Annual precipitation at rain gauge station X and the average annual precipitation at 20 surrounding rain gauge stations are given below. Examine the consistency of data at station X. Indicate at what year a regime change has occurred and how you are going to make the necessary adjustments. Year Annual Precipitation at Station x (mm) Mean of annual Precipitation of 20 surrounding stations (mm) 1962 35.5 25.8 1963 43.9 38.0 1964 48.7 33.2 1965 37.2 30.4 1966 32.4 28.2 1967 37.0 31.2 1968 54.3 39.1 1969 33.4 31.4 1970 29.6 28.1 1971 26.8 25.6 1972 33.2 36.3 1973 22.3 26.4 1974 27.3 39.0 1975 33.4 34.2 1976 29.1 26.1 1977 31.9 26.4 1978 25.6 26.1 1979 34.5 36.2 1980 33.4 29.4

2.16 The record of annual rainfall at a place is available for 25 years. Plot the curve of recurrence interval vs annual rainfall magnitude and by suitable interpolation estimate Precipitation 69 the magnitude of rainfall at the station that would correspond to a recurrence interval of (a) 50 years, and (b) 100 years. Annual Rainfall Annual Rainfall Year (ст) Year (ст) 1950 113.0 1963 68.6 1951 94.5 1964 82.5 1952 76.0 1965 90.7 1953 87.5 1966 99.8 1954 92.7 1967 74.4 1955 71.3 1968 66.6 1956 77.3 1969 65.0 1957 85.1 1970 91.0 1958 122.8 1971 106.8 1959 69.4 1972 102.2 1960 81.0 1973 87.0 1961 94.5 1974 84.0 1962 86.3

In a catchment, there are four rain-gauge stations, P, Q, R, and S. Normal annual precipitation values at these stations are 780 mm, 850 mm, 920 mm and 980 mm respectively. In the year 2013, stations Q, R, and S, were operative but P was not. Using the normal ratio method, the precipitation at station P for the year 2013 has been established as 860 mm. If the observed precipitation at station Q and R for the year 2013 were 930 mm and 1010 mm, respectively; what was the observed precipitation (in mm) at station S for that year?

The table below lists rainfall data recorded at aUSGS gage for the storm of September 1, 1999. Thebasin area is 2050 acres. Using these data, developa mass diagram (in vs. t) and a rainfall hyetograph(in./hr vs. t) in 15-min intervals and determine thetime period with the highest intensity rainfall.

According to the IDF curve given below, predict the precipitation intensity for a rainfall event with a return period(s) of 50 year and 100 year in the duration(s) of 80 minutes and 90 minutes, respectively.

Annual rainfall data for station A as well as the annual rainfall values for a group of three neighboring stations located in a meteorologically homogeneous region are given below. Test the consistency of the annual rainfall data of station A and correct the record if there is any discrepancy. Estimate the mean annual precipitation at station A. Year Station A Station B Station C Station D 1990 140.15 78.4 77.2 79.7 1991 125.2 67.9 66.5 69.4 1992 123 60 61.3 65.3 1993 116.9 62.3 68.1 71.7 1994 155.1 81.8 80.1 83 1995 168.1 87.3 85.6 82.7 1996 88.6 89.9 90.1 89.4 1997 93.7 94.7 93.7 91.5 1998 93.5 92.8 91.5 92.4 1999 90.2 89.9 90.3 90.1 2000 83.5 84.9 83.6 82.3 2001 82.4 87.1 83.4 80.7

1. In the previous exercise, you perform DMC to correct the data in Station X. Table below is the raw data from the previous exercise. 2. Using the corrected data for station X, estimate the missing rainfall data in station X for the year 2010 and 2015. Average January Precipitation from 6 nearby Station with the same climatic condition, mm 34.36 January Precipitation at Station X, mm Year 1997 35.01 1998 42.50 41.50 1999 25.87 30.30 2000 40.60 39.04 2001 40.61 37.80 2002 40.06 43.50 2003 33.02 30.20 2004 34.19 36.40 2005 36.75 40.64 2006 37.58 40.40 2007 36.87 27.25 2008 29.91 21.50 31.04 2009 39.23 2010 30.01 2011 28.02 20.40 2012 31.97 23.31 2013 31.51 23.01 2014 33.38 24.20 2015 31.20 2016 32.00 25.10 2017 30.21 22.50 2018 27.39 20.40

1. Find area precipitation by isohyetal method for a certain catchment area given the following data Isohyets, cm P 6.8 5 4 PS 3 12/2 P1.5 DEPARTMENT OF CIVIL ENGINEERING CCB 433 - Fluid Mechanics for Civil Engineers Tutorial 1 August 2022 0 Time, min Rainfall, em + 602 Area enclosed within catchment boundary, km 2. A catchment has six rain gauge stations. In a year, the annual rainfall recorded by the gauges are as follows: Station 10 0 A F Rainfall, mm 86.3 102.7 For a 10% error in the estimation of mean rainfall, calculate the optimum number of stations in the catchment 90 3.18 6816 3. From the precipitation data given, estimate cumulative rainfall and rainfall intensity. Time, min 40 60 50 0.32 0.37 0.43 Rainfall, cm - B C D 108.9 154.2 78.3 10 0.18 20 97 213 410 602 633 100 1.65 +00 2+15 2 20 0.21 1975 30 0.26 120 130 0.26 110 0.81 0.52 6+5 2 P = A₁ Athal-1975 P₂ • (Pi+ P² ] + An [Po+Pr+ A₂ Atotal + (33 E 93.1 +97 140 0.42 2 150 0.36 5+4 70 80 0.64 1.14 160 170 0.28 0.19 + 213 413…

DUE NOW. Please answer immediately please.

ina catchment, there are four rain-gauge stations P.Q.Rand S Normal annual precipitation values at these stations are 780 mm, 850 mm, 920 mm and 980 mm, respectively: In the year 2013. stations Q R and S. were operative but P was not. Using the normal ratio method, the precipitation at station P for the year 2013 has been estimated as 860 mm, If the observed precipitation at stations Qand Rfor the year 2013 were 930 mm and 1010 mm, respectively; what was the observed precipitation (in mm) at station S tor that year?