RAINFALL RAINFALL DEPTH INTENSITY
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- Below is a square basin with a single length of 3180 meters. Watershed8 hours for 5 stations at their corners (a, B, C, D) and at their full midpoint (E)Hyetographs of rainfall Figure 4. is also given. Average rainfall of the basin based on information givencalculate its height using the Thiessen method.(T=159)The data below represents the accumulative annual rainfall for station A and the accumulative average annual rainfall measured at a set of 6 neighboring meteorological stations. Find is there any consistency of data between the station A and the other stations by using double mass curve. * Year Accumulative at Accumulative at 6 station A stations 1990 40 340 1991 400 560 1992 1000 880 1993 1360 1078 1994 1720 1260 1995 2000 1440 1996 2515 1720 1997 3260 2138 1998 3600 2340 1999 4040 26001. 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…
- 9.Q3/ A square of 100km2 is gauged by three rainfall stations. Two stations at the corner of area and other at on equal distance on the boundary of area as shown in figure below the date recorded are:- N 15 cm stations rainfall 110 mm 10 cm Use thiessen Method to estimate average Rainfall alsofAccording 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.
- Q2/ The rainfall on a catchment in Iraq of area 95 km' is sampled in table below. Determine the rainfall recorded by station number (7) if the average rainfall, as computed by Thiessen method, amounts to 98 mm. Recorded rainfall, Thiessen polygon on area (mm) 84 Rain gauge (km') 4.0 90 4.0 120 10.0 86 5.1 5 87 15.1 6 76 30.6 6.2 131 20.02. The rainfall on an area of 95km? in Luzon is sample is written in the table below. Find the: a. Precipitation recorded by station 7 if the mean precipitation is computed by Thiessen mean polygon, amounts to 98 mm. Rain gauge Recorded rainfall, (mm) Area (km?) 1 84 4 2 90 4 120 10 4 86 5.1 87 15.1 6 76 30.6 7 6.2 8 131 20Hydrology: i need the answer quickly i need all the steps.
- 1 do The annual rainfall at Station X are given in table below • Rainfall gauges 1, 2 and 3 are Independent rain gauges, each of which have already been tested and are known to be functioning correctly. All the three gauges Station x nearby to are gauge مدل NEAR Station GAUGE GAUGE x STATION 1 STATION 2 1988 1989 980 1990 995 1991 1005 1000 1002 1992 600 1993 550 575 600 1994 1995 1020 Check In which 1020 960 990 1080 1150 990 1030 980 970 1040 1004 1095 1100 960 GAUGE STATION 3 1040 970 980 1020 Whether the data of station a is consistent year was the change indicated ili Compute the mean annual rainfall for Station X at its present site for the given period first without adjustment and recordly with the data adjusted for the change in regime 1003 1110 1050 900 I Compute the adjusted annual rainfall at Skakion & for the affected perioda basin, six rain gauges stations are reporting rainfall in a year.The annual rainfall recorded by gauges are: E F Station A C 68 Rainfall cm) 50 41 32 For 80 % error in estimation of mean rainfall, calculate the optimum no. of rain gauge stations in the basin. B 51 D 55Given 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