COURSE CODE: WMA 413
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COURSE COORDINATOR: DR. J. O. ADEJUWON E-MAIL: [email protected] PowerPoint PPT Presentation


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COURSE CODE: WMA 413 COURSE TITLE:HYDRO-METEOROLOGICAL INSTRUMENTATION AND NETWORK DESIGN II NUMBER OF UNITS: 2 COURSE DURATION: TWO HOURS PER WEEK. COURSE COORDINATOR: DR. J. O. ADEJUWON E-MAIL: [email protected] OFFICE LOCATION: ROOM B203, COLERM BUILDING

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COURSE COORDINATOR: DR. J. O. ADEJUWON E-MAIL: [email protected]

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Course coordinator dr j o adejuwon e mail adejoseph2003 yahoo

COURSE CODE: WMA 413

COURSE TITLE:HYDRO-METEOROLOGICAL INSTRUMENTATION AND NETWORK DESIGN II

NUMBER OF UNITS: 2

COURSE DURATION: TWO HOURS PER WEEK

COURSE COORDINATOR: DR. J. O. ADEJUWON

E-MAIL: [email protected]

OFFICE LOCATION: ROOM B203, COLERM BUILDING

OTHER LECTURERS: DR. GRACE O. OLUWASANYA


Course contents

Course Contents

  • Water levels of rivers, lakes and reservoirs, Gauges and procedures for measurement of state. Frequency of gauge measurements. Discharge measurements: by current meter, float method, dilution method. Measurement of correspondence stage by moving boat method, Ultrasonic method, Electromagnetic method, Stream gauging stations. Purpose: selection of sites, control sections, Artificial controls, stage discharge relationships. Stream flow computation, computation of average gauges height, computation of average discharge, Quality control of stream flow data.

  • Sediment discharge: Measurement of suspended sediment discharge, Measurement of bed-sediment discharge.

  • Collection, processing and publication of data. Collection and observation procedures. Transmission of hydrological and meteorological observations. Quality control, storage and cataloging. Special data collection requirement: `bucket surveys`` of storm rainfall, weather radar data. Extreme stages and discharges.

  • Pre-requisite: WMA 313.


Course requirements

Course Requirements

  • This is a compulsory course for students in the Department of Water Resources Management and Agrometeorology and the student must have passed WMA 313 before taking this course. As a school regulation, a minimum of 75% attendance is required of the students to enable him/her write the final examination


Reading lists

Reading Lists

  • Ayoade, 2003: Tropical Hydrology and Water Resources, MacMillan, Nigeria, 276pp

  • A Textbook of hydrology and Water Resources


River gauging

1.1 Introduction

What is gauging?

What is stream flow?

What constitute stream flow?

Stream flow measurement

The common terms in stream flow measurement

River or stream gauging; Hydrometry

Water level/stage

Discharge measurement

Water level measurement

Measurement of stream velocity

Computation of discharge

Stream gauging stations

Site selection criteria

River Gauging


River gauging1

1.2Stage measurement

Water levels of rivers, lakes and reservoirs

Stage measuring instruments

Staff gauges

Manually operated weight/electric sensors

Float operated stage gauges

Depth sensors

Procedures for stage measurement

Frequency of stage measurements

1.3 Discharge measurement

Velocity – Area method

Control structures

Dilution gauging

River Gauging


River gauging2

1.3.1Velocity – Area method

Determination of cross-sectional area of stream

Measuring velocity of flow

Surface floats

Current meters

Types of meters

Operational procedure

Discharge computation

Mean-section method

Mid-section method

Empirical equations

Manning's’ formula

Chezy’s formula

River Gauging


River gauging3

1.3.2The use of control structures

Weirs

---Sharp crested

---Broad crested

Flumes

1.3.3Dilution gauging or tracer method

Types of dilution gauging

Constant rate injection method

Integration or gulp method

Characteristics of chemicals/tracers

Examples of chemical used as tracers

Condition for use of dilution gauging

River Gauging


River gauging4

1.4The use of control structures

Weirs

---Sharp crested

---Broad crested

Flumes

1.5Stage –Discharge relationship

Flow rating curve

The rating equation

Rating table

River Gauging


Sediment discharge

  • Measurement of sediment discharge

    • Suspended sediment discharge

    • Bed sediment discharge

Sediment Discharge


Collection processing and publication of data

  • Collection and observation procedures

    • Transmission of hydrological and meteorological observations

    • Quality control

    • Storage and cataloguing

    • Special data collection requirements

      • ‘Bucket surveys’ of storm rainfall

      • Weather radar data

      • Extreme stages and discharges

Collection, processing and publication of data


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