Hydrology Tutorial on Flood

Floods refer to the overflow of water onto normally dry land, often caused by heavy rainfall, melting snow, or dam failure. They can cause significant damage to infrastructure, agriculture, and human settlements. Studying floods is crucial as it helps us understand their causes, patterns, and impacts on both the natural environment and human societies. This knowledge enables us to develop effective strategies for flood prevention, mitigation, and response, ultimately saving lives and minimizing economic losses. Click here to see the tutorial.

Below is the brief outline :

Outline :

1. Definition

2. Empirical method of Flood Peak Estimation

Rational Equation

Unit hydrograph technique

Flood frequency studies

3. Rational Method

Time of Concentration

Rainfall Intensity

4. Characteristics of Empirical Formulae

5. Dickens Formula

6. Ryves Formula

7. Inglis Formula

8. Fullers Formula

9. Baird and Mcillwraith(1951)

10. Estimation of Flood from Frequency Analysis

11. Probable density function (PDF)

Gumbel distribution

Normal Distribution

Log-Normal Distribution

Normal distribution of the Logarithm of Variate.

Pearson Type III Distribution

Log-Pearson Distribution

Pearson distribution of the Logarithm of the Variates.

12. Plotting Position Probability(PPP)

Bulletin 17B PPP

Weibull PPP for Uniformly Distributed Dataset

Hazen PPP for Uniformly Distributed Dataset

Cunnane PPP for Uniformly Distributed Dataset

13. Determination of the Flood Magnitude

Hydrologic Frequency Analysis

14. Adjustment for Urbanization

Rational Equation(modified for urbanization)

15. Urban Adjustment Factor(Leopold,1968)

16. Probable Maximum Precipitation

Hershfield Method

Frequency Factor Calculation

Homogeneity of Dataset

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