Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
Paper format. National Examination, December 2017, 16-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 on the first inside left-hand sheet of 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, which on this sitting is internally consistent — every problem’s sub-parts sum to twenty.
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, hydrologic modelling); C. W. Fetter, Applied Hydrogeology, 4th ed. (Darcy’s law, confined and unconfined aquifers, storativity); 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 and the WMO Manual on Stream Gauging (stage–discharge rating practice); the Transportation Association of Canada Guide to Bridge Hydraulics and provincial highway drainage manuals (culvert design); and the Canadian Dam Association Dam Safety Guidelines (inflow design flood and flood-wave routing).
Check — the illustrative data below are the solver’s own. Every problem on the December 2017 paper is a discussion question, and the paper supplies no numerical data whatsoever. Where a short calculation appears below it exists only to demonstrate the method concretely and to make the answer checkable; its input values are stated explicitly in a Given line as assumed, representative Canadian values. They are not exam data. A candidate who assumed different but reasonable values and carried them through consistently would earn full marks, and page-1 Note 1 expressly invites the candidate to state any assumptions made.
