Question # 4The average annual precipitation for the four sub-basins constituting a large river basin is58, 67, 85 and 80 cm. The sub-basin areas are 900, 690, 1050 and 1650 km², respectively.What is the average annual precipitation for the basin as a whole?Question # 5The annual precipitation at station 'A' and the average precipitation at15 surrounding stations are given in the Table 3.19 given below:a. Determine the consistency of the record at station 'A'.b. In which year, there is a regime change indicated?Table 3.19 Data TableAnnual PrecipitationStation AAnnual PrecipitationStation AYear15 StationYear15 StationAverage (cm)(cm)50,5(cm)36.0Average (cm)27.560.5197171.51981197290.057.0198242.0197316.027.5198318.055.0197421.525.0198430.038.5197550.560.0198554.038.5197662.569.522.0198648.047.549.5197755.0198712.0197836.057.0198836.024.0197942.036.5198942.044.0198042.019.5199036.060.5

Question #4 Given: Average annual precipitation for four basins 58 cm 67 cm 85 cm 80 cm Area…

Question # 4 The average annual precipitation for the four sub-basins constituting a large river basin is 58, 67, 85 and 80 cm. The sub-basin areas are 900, 690, 1050 and 1650 km², respectively. What is the average annual precipitation for the basin as a whole?

Question # 4 The average annual precipitation for the four sub-basins constituting a large river basin is 58, 67, 85 and 80 cm. The sub-basin areas are 900, 690, 1050 and 1650 km², respectively. What is the average annual precipitation for the basin as a whole?

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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A: Determine the average precipitation depth using isohvetal method within the basin for a certain catchment area given the following data? Isohyetal ( in) 6.8 6. 2 1.5 5 4 3. Area (sq. mile) 20 97 213 410 602 633
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…
6. In a catchment area, approximated by a circle of diameter 100 km, four rainfall stations are situated inside the catchment and one station is outside in its neighborhood. The coordinates of the center of the catchment and of the five stations are given below. Also given are the annual precipitation recorded by the five stations in 1980. Determine the average annual precipitation by the Thiessen-mean method. Centre: (100, 100) Diameter: 100 km Distance are in km 3 4 Station Coordinates (30, 80) (70, 100) (100, 140) (130, 100) (100, 70) Precipitation 85 135.2 95.3 146.4 102.2
1. Find area precipitation by isohyetal method for a certain catchment area given the following data Isohyets, cm P 6.8 S 4 PS 3 12/2 P1.5 DEPARTMENT OF CIVIL ENGINEERING CCB 433 - Fluid Mechanics for Civil Engineers Tutorial 1 August 2022 O 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 102.7 Rainfall, mm 86.3 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 - 10 0.18 20 97 213 410 602 633 100 1.65 B C D E 108.9 154.2 78.3 93.1 +00 2+15 2 20 0.21 1975 30 0.26 120 130 0.26 110 0.81 0.52 P = A₁ 6+5 2 Athal-1975 P₂ • (Pi+ P² ] + An [Po+Pr+ A₂ Atotal + (33 +97 140 0.42 2 150 0.36 5+4 70 80 0.64 1.14 160 170 0.28 0.19 + 213 413…
4. In year 1996 the annual rainfall recorded the rain gauges are as follows: Station A N Rainfall 130.0 142.1 118.2 108.5 165.2 102.1 146.9 (cm) For a 5% error in the estimation of the mean rainfall, calculate the minimum number of additional stations required to be established in the catchment.
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
Problem 2: A square shape catchment with 100 km² area has five raingauge stations at the center of the catchment (A) and center of each side of basin (B, C, D and E). Each station has certain rainfall recorded which are given in Table below. Compute the mean precipitation applying Thiessen-mean method. Station A B с D E P (mm) 24 20 30 35 D Ud Å E B 5 15
(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)
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(50%)1. Test the consistency of the 22 years of data of the annual precipitation measured at station A. Rainfall data for station A as well as the average annual rainfall measured at a group of eight (8) neighboring stations located in a meteorologically homogeneous region are given as follows: Year Annual Year Annual Average Annual Average Annual Rainfall of 8 Stations Rainfall of Rainfall of Station A Rainfall of 8 Station A (mm) Stations (mm) groups (mm) groups (mm) 1946 177 143 1957 158 164 1947 144 132 1958 145 155 1948 178 146 1959 132 143 1949 162 147 1960 95 115 135 1950 194 161 1961 148 1951 168 155 1962 142 163 1952 196 152 1963 140 135 1953 144 117 1964 130 143 1954 160 128 1965 137 130 1955 196 193 1966 1967 130 146 1956 141 156 163 161 a). In what year is a change in regime indicated? b). Adjust the recorded data at station A and determine the mean annual precipitation.
A catchment area has seven rain gauge stations. In a year, the annual rainfall recorded by the gauges are as follows: Station P Q R. S V Rainfall 120 140 118 109 160 100 145 (cm) For a 5% error in the estimation of the mean rainfall, calculate the minimum number of additional stations required to be established in the catchment.
SHOW THE PLOT IN WHICH YEAR THE REGIME STARTED AND PROVE YOUR ANSWER. Test the consistency of the 22 years of data of the annual precipitation measured at station A. Rainfall data for station A as well as the average annual rainfall measured at a group of eight neighbouring stations located in a meteorologically homogeneous region are given as follows. ... Average Average Annual Annual Annual Annual Year Rainfall of Rainfall of 8 Year Rainfall of Rainfall of 8 Station A Station groups Station A Station groups (mm) (mm) (mm) (mm) 1946 177 143 1957 158 164 1947 144 132 1958 145 155 1948 178 146 1959 132 143 1949 162 147 1960 95 115 135 163 1950 194 161 1961 148 1951 168 155 1962 142 1952 196 152 1963 140 135 1953 144 117 1964 130 143 1954 160 128 1965 137 130 1955 196 193 1966 130 146 1956 141 156 1967 163 161 (a) In what year is a change in regime indicated? A 1993 B) 1994 1995 1996