Basic Hydrology & Hydraulics: DES 601

Basic Hydrology & Hydraulics: DES 601 Module 1 Introduction

Instructor and Participant Background • Introductions • Instructor • Participants • Sign-in sheet process • VTC letter Module 1

Training Logistics • Restroom locations • Breaks • Each module is about an hour can take short breaks between lessons (5 min) • Lunch break is 1 hour • Assessment • Need to pass the assessment at end of the training (examination) Module 1

Course Objectives • Derive watershed parameters. • Derive flow rates using hydrologic methods. • Able to apply hydraulic concepts and perform a simple hydraulic analysis. Module 1

Acronyms • HDM: TxDOT Hydraulic Design Manual 2011 Ed. • HDS2: FHWA-NHI-02-001 Highway Hydrology Module 1

Basic Hydrology and Hydraulics DES 601 TxDOT 3 days Context Urban Storm Drain Design DES 602 TxDOT 2 ½ days Culvert Design and Bridges DES 604 TxDOT 3 days Geopack Drainage DES 738 TxDOT 3days Basic: All engineers and designers HEC-RAS DES 802 NHI 3 ½ days Managing Floodplain Development through the NFIP 48MGFL FEMA 4 ½ days Certified Floodplain Manager Exam ½ day Stream Stability at Highway Bridges NHI 3 days Intermediate: Engineers Practical Highway Hydrology NHI 3 days Stream Scour Instability Countermeasures DES 807 NHI 2 ½ days Basic Watershed Modeling using HEC-HMS DES 606 3 days Floodplain Encroachment Advanced: DHEs and Hydraulics Branch Module 1

Course Structure • Hydrology • Module 1 through 12 • Hydraulics • Module 13 through 22 • Assessment • Module 23 is preparation, Module 24 is the assessment. Module 1

Hydrology • Hydrology is the study of the occurrence, distribution, and movement of water above, on, and below the surface of the earth. • Hydrology is used to estimate discharges at a location Module 1

Hydraulics • Hydraulics is the study of the physics of water motion. • Hydraulics is used to estimate flow depths in hydraulic structures such as channels and culverts. • Hydraulics is also used to estimate resulting forces at a location. Module 1

Watershed • The fundamental unit in surface water hydrology is the watershed. • A watershed is defined as the area on the surface of the earth that drains to a specific location. Module 1

The Watershed • Watershed physical properties include: • Area • Main channel length (if a main channel exists) • Slope (requires the specification of path), • Soil moisture/permeability Module 1

Watershed Delineating • Topographic maps • Hands-on methods • Marking directly on map • Tracing using light table • Computerized methods • DEMs • GIS software • Semi-automated delineation • Fully automated delineation • Automated measurements should always be verified Module 1

The Watershed • Watershed physical and descriptive characteristics determined after delineation. • Areas and lengths • Slopes • Cover Module 1

Minimal Watershed Description • Watershed boundary on a map • Area that drains to the outlet • Main channel length • Slope(s) • Other Descriptive Module 1

Example/Exercise: Delineate a Watershed • Use the 11X17 Map of Harden Branch Creek in Concho County Texas Module 1

Summary • Course logistics • Introduced hydrology and hydraulics • Introduced the “watershed” as the fundamental unit of hydrology Module 1

Basic Hydrology & Hydraulics: DES 601