Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
Paper format. National Examination, December 2015, 98-Civ-B4 Engineering Hydrology, three hours’ duration, closed book with one two-sided candidate-prepared aid sheet (8½″ × 11″) and one approved Casio or Sharp calculator whose model designation must be written in the work book. Seven problems are printed. Page-1 Note 4 states that any five (5) questions constitute a complete paper and that only the first five answers appearing in the work book will be marked; Note 5 weights each problem at twenty (20) points, so the examinable total is 5 × 20 = 100 points. All seven problems are solved here, because this set is a study resource rather than a timed sitting. Sub-part mark values below are the printed ones from the page-6 marking scheme.
Reference texts. V. T. Chow, D. R. Maidment and L. W. Mays, Applied Hydrology (hydrologic cycle, unit hydrographs, routing, frequency analysis, infiltration); L. W. Mays, Water Resources Engineering, 3rd ed. (design application, stormwater management, reservoir operation); W. Viessman and G. L. Lewis, Introduction to Hydrology, 5th ed. (measurement, areal precipitation, energy budget, snowmelt); C. W. Fetter, Applied Hydrogeology, 4th ed. (Darcy’s law, hydraulic conductivity, aquifer flow); V. T. Chow, Open-Channel Hydraulics (1959) (flood-wave propagation and unsteady flow). Canadian practice references: Environment and Climate Change Canada / Water Survey of Canada HYDAT archive and the ECCC Engineering Climate Datasets (short-duration rainfall IDF curves and the IDF_CC climate-adjustment tool); ISO 1100-2 / WMO Manual on Stream Gauging (stage-discharge rating practice); and the Canadian Dam Association Dam Safety Guidelines (inflow design flood and flood-wave routing).
Check — illustrative data are the solver’s own. Every problem on this paper is a discussion question; none supplies numerical data. Where a short calculation is shown below it exists to demonstrate the method, and its input values are stated explicitly in a Given line as assumed, representative Canadian values. They are not exam data, and a candidate who assumed different but reasonable values and carried them through consistently would earn the same marks.
Check — page-6 marking-scheme typo on Problem 6. The printed scheme reads “6. (i) 7, (ii) 7 marks, 6 marks total”, which omits sub-part (iii) and states a total of 6. The page-5 margin marks give (7)(7)(6) and page-1 Note 5 states that every question is weighted at twenty (20) points, so Problem 6 is marked at 20 here, exactly as the other six problems are.
