Answered: the station-average method can be used.…

the station-average method can be used. The estimated catch at the gage with the missing monthly precipitation total is P?

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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Concept explainers

Probability, risk and uncertainty analysis for hydrological design

It gives a framework that is financially critical for finding the exceptional designs of hydrological systems with a reduced cost in total inclusive of the project cost and the disaster mitigation cost. But there would be hardly any assessment of a decent quality damage function. Hence, errors in demonstrating the hydrologic events, incorrect model parameters, and so on may occur. Here, we will discuss a specific hydrological design that of a detention basin for studying and understanding the risk-based procedure, uncertainties, and probability analysis by following a systematic framework.

Question

10% of the annual catch at gage X is 41 mm and the average annual catch at the three regional.gages is within + or - 41 mm.; therefore, the station-average method can be used. The estimated catch at the gage with the missing monthly precipitation total is P?

Monthly precipitation
(mm)
Gage
Annual
precipitation(mm)
A
420
26
B
| 410
31
390
23
410
Figure 1 Annual and monthly precipitation

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An 40-ha watershed was subjected to a 5- year rainfall with a depth of 122 mm with characteristics given below. Compute for the peak runoff of the watershed. Hydrologic Soil Group Land Use, Area Curve Treatment, and (ha) Number Condition Row crop, 24 82 contoured, good Woodland, good В 16 55
A 20-minute rainfall event occurred at a small catchment (without any base flow), which has 2 branch rivers (or tributaries) with individual sub-catchments. This storm generated a triangular runoff hydrograph with peak flow of 139 L/s at the catchment outlet. Base of the triangular hydrograph was 1 hr 12 minutes. The rainfall distribution and other relevant data is given in Table 1. Assume that the rainfall was uniform over the subcatchments. Calculate the followings: i) Total rainfall volume fallen on the catchment. ii) Total runoff volume generated from the catchment during this rainfall event. iii) Average runoff coefficient for the whole catchment for that particular rainfall event. Table 1: Data for Question 1(b) Sub-catchment Catchment Rainfall No. Area (ha) (mm) 1 1.24 37 0.58 20
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