Bissoy.com
Doctors Medicines MCQs Q&A

A 6 hours storm had 4 cm of rainfall and the resulting runoff was 2 cm. If ϕ index remains at the same value, the runoff due to 10 cm of rainfall in 12 hours in the catchment is

A 6 hours storm had 4 cm of rainfall and the resulting runoff was 2 cm. If ϕ index remains at the same value, the runoff due to 10 cm of rainfall in 12 hours in the catchment is Correct Answer 6.0 cm

Infiltration Rate =2/6=1/3cm/hr
Infiltration=1/3*12=4cm
Run-off= 10-4=6 cm

Related Questions

Which of the following will pose difficulties in adopting U.H.G. principles and processes in evaluating flood hydrographs of basins? 1. non-uniform real distribution within a storm 2. Intensity variation within a storm 3. The centre of the storm varies from storm to storm in case of large catchments 4. Dividing into a number of sub-basins and routing the individual DRHs through their respective channels to obtain the composite DRH at the basin outlet 5. Large storages within the catchment
An 8-hour storm with incremental rainfall during each successive hour is tabulated herewith. What will be the correction to total runoff when, whereas the actual ϕ index was 0.5 cm/hour, a wrong magnitude of 0.6 cm/hour was adopted in computing the total runoff? Time from start (hour) Incremental rainfall in each hour (cm) 1 0.4 2 0.8 3 1.2 4 0.9 5 1.8 6 1.0 7 0.3 8 0.8
In the following question, sentences of a paragraph have been jumbled and labelled as A, B, C and D. You are required to rearrange the jumbled sentences of the paragraph and mark your response accordingly by selecting the correct option. A: Water harvesting means capturing rain where it falls or capturing the runoff in your own village or town. B: It also provides for the measures that should be taken to keep that water clean by not allowing polluting activities to take place in the catchment. C: Water harvesting can be undertaken through a variety of ways, such as, capturing runoff from rooftops, capturing runoff from local catchments, capturing seasonal floodwaters from local streams, etc. D: These techniques can serve purposes, such as, provide drinking water, provide irrigation water, increase groundwater recharge, etc.
The design annual rainfall for the catchment of a proposed reservoir has been computed to be 99 cm. The catchment area contributing to the proposed reservoir is 1000 sq.km having a mean annual temperature of 20°C. Calculate the annual design catchment yield for the reservoir using Khosla’s formula.
The rainfall in Shillong for the first two days was in the ratio of 6 : 7. The average rainfall for the last four days was recorded to be 0.90 inch. The average rainfall of six days was 1.25 inch. Which of the following is/are correct? A. Average rainfall on 2nd day is 2.8 inch B. Average rainfall on 1st day is 1.8 inch C. Average rainfall on 2nd day is 2.1 inch D. Average rainfall on 1st day is 2.4 inch
A triangular DRH due to a storm has a time base of 80 hrs and peak flow of 50 m3/sec occurring at 20 hrs from the start. If the catchment area is 144 sq. km the rainfall excess in the storm was
The monthly rainfall chart based on 50 years of rainfall in Agra is shown in the following figure. Which of the following are true? (k percentile is the value such that k percent of the data fall below that value) (i) On average, it rains more in July than in December (ii) Every year, the amount of rainfall in August is more than that in January (iii) July rainfall can be estimated with better confidence than February rainfall (iv) In August, there is at least 500 mm of rainfall
An Identity Card has the number ABCDEFG, not necessarily in that order, where each letter represents a distinct digit (1, 2, 4, 5, 7, 8, 9 only). The number is divisible by 9. After deleting the first digit from the right, the resulting number is divisible by 6. After deleting two digits from the right of original number, the resulting number is divisible by 5. After deleting three digits from the right of original number, the resulting number is divisible by 4. After deleting four digits from the right of original number, the resulting number is divisible by 3. After deleting five digits from the right of original number, the resulting number is divisible by 2. Which of the following is a possible value for the sum of the middle three digits of the number?
______ catchment area is a sum of free catchment area and intercepted catchment area.
Consider the following statements: 1. The normal annual rainfall of a station is obtained as the arithmetic average of the successive annual rainfall in the last 30 years. 2. The “normal rainfalls” are updated by deleting the needful number of oldest years’ data from the record and adding the needful number of most recent years’ data to the record. 3. The standard deviation computed for the rainfall data is taken as a measure of the variability of the rainfall during the self-same set of years. 4. If the observed rainfall in any year is less than the current average annual rainfall, then that year is called a dry year. Which of the above statements are correct?