Rainfall amounts over five consecutive days were recorded as 100 mm, 80 mm, 60 mm, 40 mm, and 20 mm, respectively. Given that the infiltration index (storm loss rate) for the catchment area is previously determined to be 50 mm/day, what is the total surface runoff for this period?

Irrigation, Water Resources Engineering and Hydrology MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

Browse all Irrigation, Water Resources Engineering and Hydrology MCQs →

Irrigation, Water Resources Engineering and Hydrology

PPSCFPSCNTSPakistan govt jobs

Subject: Irrigation, Water Resources Engineering and Hydrologycivil-engineering-mcqs › irrigation-water-resources-engineering-and-hydrology
Published: 18 Jan 2019
Last updated: 28 May 2026

Browse all Irrigation, Water Resources Engineering and Hydrology MCQs →

Explanation

The infiltration index indicates that 50 mm of rainfall is absorbed each day, reducing the effective rainfall contributing to runoff. Calculating excess rainfall for each day (rainfall - 50 mm) and summing positive values: Day 1: 100 - 50 = 50 mm, Day 2: 80 - 50 = 30 mm, Day 3: 60 - 50 = 10 mm, Day 4: 40 - 50 = 0 mm, Day 5: 20 - 50 = 0 mm. Total runoff = 50 + 30 + 10 = 90 mm.

Practice related questions from the same subject.

← Back to Civil Engineering Mcqs

Rainfall amounts over five consecutive days were recorded as 100 mm, 80 mm, 60 mm, 40 mm, and 20 mm, respectively. Given that the infiltration index (storm loss rate) for the catchment area is previously determined to be 50 mm/day, what is the total surface runoff for this period?

Explanation

More Irrigation, Water Resources Engineering and Hydrology MCQs