The rainfall excess derived from the weighted-average daily rainfall in a basin are indicated below. The 24-hr unithydrograph from the observed data in the basin is also given. Estimate the daily streamflow. A constant baseflowof 20 m³/s has been estimated.Date, July 200661418Rainfall excess (mm)285.2 48.5Unit Hydrograph:Time (days)023456Flow (m³/s)01.511.67.75.02.30

For Rainfall excess of 28 mm: Total Daily Streamflow ≈ 562.7868 m³For Rainfall excess 5.2 mm:…

Answered: The rainfall excess derived from the…

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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B- The mass curve of rainfall in the storm of total duraƟon 300 minutes is given below. Draw the hyetograph of the storm at 60 minutes interval step and intensity in cm/hr.(Show by calculaƟons )
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)
Using Station Average Method, find the average rainfall over a catchment with the following data: 14.4mm, 32.2mm, 41.3mm 10.4mm, 28.10mm, 21.2mm, and 16.2 mm
Watershed area = 11.1 acres Average N concentration of inflow = 1.9 mg/L Total Rainfall = 44.75 inches Average N concentration of outflow = 1.4 mg/L Total pond inflow = 330,441 ft3 Average P concentration of inflow = 0.42 mg/L Total pond outflow = 288,492 ft3 Average P concentration of outflow = 0.23 mg/L Total pond volume = 46,893 ft3 (this is the volume to the top of the riser before overflow occurs) Answer the following questions: a) What percentage of the total rainflow flowed into the pond? b) If the pond were completely empty, how much rainfall in inches would be required to fill it to the total pond volume? Use your answer to question A to help answer this. c) What is the total Nitrogen load flowing into the pond in lbs/Acre/Year? d) How many lbs of Nitrogen did the pond remove over the year? e) What percentage of Phosphorous was removed by the pond?
An experimental rectangular plot of 10 km 12 km has five rain gauge stations as shown in the figure. The storm rainfall and coordinates of the stations are given in the table. 1. Estimate the rainfall at station E. 2. Construct the Thiessen Polygon and compute for the areal precipitation.
R The following table show the precipitation in (mm/hr.) observed at the rain gages (A, B, and C) which shown in figure belo 1. Find the average precipitation each hr. over the catchment by Thiessen method . 2. Draw a graphical relation between the average precipitation each hr. and the time. - 3. Find the (& and W- index), if the runoff volume=104.4 cm.km® thr.) 1 2 3 a 5 Rain gage A 5 | [45 [ | & 8 3 7 [35 = [ 2 % a 9 |20 | 12 | & ain gage c i 10km rain gage - ain gge 106m
Separate the baseflow from the stream flow hydrograph using the straight-line method. What is the baseflow? Calculate the direct runoff hydrograph (DRH) and plot it as an x-y scatter plot. Time (hr) Discharge (cfs) 0.0 60 0.5 54 1.0 50 1.5 90 2.0 137 2.5 176 3.0 200 3.5 198 4.0 140 4.5 97 5.0 60 5.5 40 6.0 35 6.5 32 7.0 29 7.5 24 8.0 22 8.5 20 9.0 20 9.5 19 10.0 19 10.5 18 11.0 18 11.5 18 12.0 17
A catchment with an area A = 85 km^2, has four rainfall gauges (P1 – P4) according to the figure. Use the rainfall data in the table to determine the areal rainfall over the catchment. a.Use the arithmetic averaging method to calculate areal rainfall. b.Use the Thiessen method to calculate areal rainfall.
Hydrology Subject: Using Arithmetic Method, Thiesen Polygon Method and Isohyets Method, Find average rainfall over a catchment. The data is
can you subtract 0.5 mm for all incremental rainfall on the given table and do it again?
Following is the recorded data of a 0.8 km2 wide lake collected over a year: It receives a total rainfall of 1400 mm, the surface inflow and outflow is 0.15 m3/s and 0.17m3/s respectively. If the surface elevation of lake reduces by 45 mm over the year, then determine the lake evaporation (in mm).
Find the average rainfall over a catchment with the Thiessen polygon method.

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