3. Using arithmetic mean and isohyetal methods, estimate the areal rainfall for the catchment shown (FigQ3). All working must be shown. -14 13 12 0 0 1615 116 13.4 14 -12 10.7 FigQ3: Catchment Boundary and Rain gauge Stations

3. Using arithmetic mean and isohyetal methods, estimate the areal rainfall for the catchment shown (FigQ3). All working must be shown. -14 13 12 0 0 1615 116 13.4 14 -12 10.7 FigQ3: Catchment Boundary and Rain gauge Stations

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 Sewers and Detention

The storm drains system transports rainwater or stormwater and other runoff from roads, parking lots, and roof downpipes directly to nearby creeks, rivers, or the sea without any treatment.

Question

16
Name and ID: Bongana Moseki 202006375
3. Using arithmetic mean and isohyetal methods, estimate the areal rainfall for the
catchment shown (FigQ3). All working must be shown.
14
13
12
1615
1.
0
7
Ish yote pea
t
13.4
16
14
1-12
10.7
FigQ3: Catchment Boundary and Rain gauge Stations
-Precipitat
10
3(v)
3

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Determine average precipitation using arithmetic mean method
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* One of four monthly-read rain gauges on a catchunent area develops a fault in a month when the other three gauges record respectively 37, 43 and 51mm. If the average annual precipitation amounts of these three gauges are 726. 752 and 840mm respectively and four broken gauge 694mm Estimate the missing monthly precipitation
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)) (110-30) (140.90 430 115)(40110 15.60) Coordinates of the There are 10 raingauge stations available to calculate the rainfall characteristics of a catchment whose shape can be approximately described by straight lines joining the following coordinates (distances in kilometres): (30, 0), (80, 10), (110, 30), (140, 90), (130, 115), (40, 110), (15, 60). Coordinates of the raingauge stations and the annual rainfall recorded in them in the year 1981 are given below. ons an Station 1 2 3 4 Co-ordinates (0, 40) (50, 0) (140, 30) (140, 80) (90, 140) Annual Rainfall (cm) 132 136 93 81 85 Station 6. 8. 9. 10 Co-ordinates (0, 80) (40, 50) (90, 30) (90, 90) (40, 80) Annual Rainfall (cm) 124 156 128 102 128