Hydrology in Civil Engineering Course

Lesson 1 • Water Balance Equations

Introduces continuity-based accounting of inflows, outflows, and storage change. Connects cycle concepts to quantitative engineering calculations.

Lesson 2 • Hydrologic Data and Measurement

Surveys instruments and networks used to collect rainfall, streamflow, and groundwater data. Accurate data collection underpins reliable hydrologic modeling.

Lesson 3 • Statistical Concepts in Hydrology

Applies probability and statistics to characterise hydrologic variability. These tools are essential for frequency analysis and design storm selection.

Lesson 1 • Design Storm Development

Converts IDF data into time-distributed rainfall hyetographs for use in runoff models. Proper storm temporal distribution affects peak flow estimates significantly.

Lesson 2 • Extreme Rainfall and Climate Trends

Analyses non-stationarity in rainfall records and adjusts design values for changing conditions. Prepares engineers to update IDF curves as climate data evolves.

Lesson 3 • Intensity-Duration-Frequency Analysis

Fits frequency distributions to annual maximum rainfall series to produce IDF curves. IDF curves are the primary input for design storm construction.

Lesson 1 • Infiltration Models

Presents empirical and physically based equations describing infiltration rate over time. Model selection depends on data availability and required accuracy.

Lesson 2 • Soil Properties Affecting Infiltration

Links soil texture, structure, and moisture content to hydraulic conductivity and infiltration capacity. Soil characterisation is the foundation for selecting appropriate infiltration models.

Lesson 3 • Unsaturated Zone Flow

Describes water movement through the vadose zone using Richards' equation concepts. Understanding unsaturated flow links surface infiltration to groundwater recharge.

Lesson 1 • Hydrograph Components and Baseflow

Separates observed hydrographs into direct runoff and baseflow contributions. Accurate separation improves volume estimates and groundwater recharge assessment.

Lesson 2 • Unit Hydrograph Theory

Develops the unit hydrograph concept and superposition principle for complex storm events. Unit hydrographs are the standard tool for converting rainfall excess to runoff.

Lesson 3 • Rational Method for Peak Flow

Applies the rational formula to small urban and rural catchments to estimate peak discharge. Limitations and appropriate application ranges are emphasised.

Lesson 4 • Watershed Characteristics and Response

Quantifies morphometric parameters that control hydrograph timing and shape. Watershed delineation and characterisation are prerequisite steps for all runoff modeling.

Lesson 1 • Flood Frequency Analysis

Fits probability distributions to annual peak flow records to estimate design flood magnitudes. Frequency analysis results directly support bridge, culvert, and levee design.

Lesson 2 • Principles of Flood Routing

Introduces storage-continuity relationships that govern hydrograph attenuation and translation. Routing principles apply to both channel reaches and reservoir structures.

Lesson 3 • Reservoir and Dam Routing

Routes inflow hydrographs through reservoir storage using level-pool and modified Puls methods. Results inform spillway design and dam safety assessments.

Lesson 4 • Hydraulic Channel Routing

Solves Saint-Venant equations numerically to simulate unsteady flow in channels. Hydraulic routing provides higher accuracy for complex channel geometries.

Lesson 1 • Transient Well Hydraulics

Applies Theis and Cooper-Jacob methods to analyse time-varying drawdown during pumping tests. Transient analysis yields aquifer parameters needed for long-term yield prediction.

Lesson 2 • Groundwater-Surface Water Interaction

Quantifies exchange fluxes between streams and aquifers using streambed conductance concepts. This interaction affects baseflow, water quality, and riparian ecosystem health.

Lesson 3 • Aquifer Types and Properties

Classifies confined, unconfined, and leaky aquifers and defines their hydraulic parameters. Aquifer classification determines which flow equations and well formulas apply.

Lesson 4 • Darcy's Law and Groundwater Flow

Applies Darcy's law to compute groundwater flux and constructs flow nets for seepage analysis. Flow net construction is a core skill for dam and foundation seepage evaluation.

Lesson 1 • Scenario and Climate Change Modeling

Drives calibrated models with future climate and land use scenarios to project hydrologic change. Scenario analysis supports adaptive infrastructure design under uncertainty.

Lesson 2 • Model Types and Selection

Compares lumped, semi-distributed, and fully distributed model architectures. Model selection balances data availability, project scale, and required output resolution.

Lesson 3 • Model Calibration and Validation

Adjusts model parameters to match observed streamflow using objective performance metrics. Validation on independent data confirms model transferability to design conditions.

Lesson 4 • Sensitivity and Uncertainty Analysis

Identifies parameters with the greatest influence on model outputs and quantifies prediction uncertainty. Uncertainty bounds inform risk-based engineering decisions.

Lesson 1 • Stormwater Drainage System Design

Sizes storm sewers, inlets, and detention basins using computed peak flows and volumes. Proper sizing prevents flooding while minimising construction and maintenance costs.

Lesson 2 • Dam and Spillway Hydrologic Design

Determines probable maximum flood and routes it through reservoir to size spillway capacity. Spillway adequacy is critical to dam safety and downstream life protection.

Lesson 3 • Floodplain Mapping and Management

Delineates floodplain boundaries using routed flood profiles and terrain data. Floodplain maps support land use regulation and flood insurance administration.

Lesson 4 • Culvert and Bridge Hydraulic Design

Applies flood frequency results to size culverts and bridge openings for target return periods. Undersized crossings cause road overtopping, scour, and structural failure.