a) For a river the estimated flood peaks for two return periods by us…

Previous year question for Hydrology and Irrigation Engineering.

Question

a) For a river the estimated flood peaks for two return periods by using Gumbel's method are given below:

| Return period (years) | Peak flood $(\text{m}^3\text{/s})$ |

|---|---|

| 100 | 485 |

| 50 | 445 |

What flood discharge in this river will have a return period of $1000\text{ years}$? (10)

b) Describe briefly the various methods for obtaining the maximum flood discharge of a river. (10)