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 Highway Hydrology Module 1

Context Module 1 Stream Stability at Highway Bridges NHI 3 days Stream Scour Instability Countermeasures DES 807 NHI 2 ½ days Basic Hydrology and Hydraulics DES 601 TxDOT 3 days Culvert Design and Bridges DES 604 TxDOT 3 days Urban Storm Drain Design DES 602 TxDOT 2 ½ days Geopack Drainage DES 738 TxDOT 3days 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 Practical Highway Hydrology NHI 3 days Basic Watershed Modeling using HEC-HMS DES days Floodplain Encroachment Basic: All engineers and designers Advanced: DHEs and Hydraulics Branch Intermediate: Engineers

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

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