Luận văn thạc sĩ change detection and analysis of shoreline in the northeast of taiwan using

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THAI NGUYEN UNIVERSITY

UNIVERSITY OF AGRICULTURAL AND FORESTRY

NGUYEN VU TUAN ANH

CHANGE DETECTION AND ANALYSIS OF SHORELINE IN THE

NORTHEAST OF TAIWAN USING REMOTELY SENSED DATA

BACHELOR THESIS

Study Mode : Full - Time

Major : Environmental Science and Management

Faculty : International Training and Development Center

Batch : K44 – AEP

THAI NGUYEN - 2016

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Thai Nguyen University of Agriculture and Forestry

Degree program Bachelor of Environmental Science and Management

Full name NGUYEN VU TUAN ANH

Student ID DTN1253180060

Thesis title

Change detection and analysis of shoreline in the northeast of

Taiwan using remotely sensed data.

Supervisor Assoc. Prof. Tang-Huang Lin and MSc. Nguyen Van Hieu

Abstract:

This study focuses on the use of remotely sensed data for monitoring coastline

changes from seven beaches located at the Yilan County in Taiwan during the 2000 to

2015 period. For the satellite image data processing, in this study we use the Modified

Normalized Difference Water Index (MNDWI) as it can efficiently suppress from the

water information the noise coming from built-up land, vegetation and soil. A GIS

(Geographic Information System) approach was used for the spatial analysis of

coastline change. It was observed that the coastline change in the Yilan County

underwent complicated changes during this 15 year period. In this period, the accretion

rate in Yilan coastal area was about 1.04 km and the erosion rate was about 0.34 km.

For the analysis of the changes of the coastlines, multi-temporal Landsat images have

been used. The zones of varying erosion and accretion have important implications for

coastal zone management in the Yilan County region.

Keywords

Yilan County, erosion, accretion, MNDWI, remote

sensing, geographic information system

Number of pages

Date of submission

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ACKNOWLEDGEMENT

First and foremost, I wish to express my sincere thanks to the boards of Thai

Nguyen University of Agriculture and Forestry, Faculty of International Training and

Development Center; Advanced Education Program, for giving me this valuable and

unforgettable chance studying and working in Taiwan, and more important providing

me all necessary facilities, skills and knowledge to complete this bachelor thesis.

Furthermore, I want to deeply thanks to Assoc. Prof. Tang-Huang Lin (Head

of Environmental Remote Sensing Laboratory (ERSL), National Central University,

Taiwan) for given permission to accomplish my Bachelor thesis there, and also his

contact motivating supervision during my studies in the research group of ERSL, I

would like to thank to Ms. Nicole Wang, who provided me the materials for my

research.

This study was also supported and instructed by Professor Nguyen Van Hieu

(Head of Spatial Research Laboratory, Thai Nguyen University of Agriculture and

Forestry, Vietnam). In particular, I place on record my gratitude to him for the

multivariate analysis, and the knowledge of some significant change of sandy beaches

around the world. Without him, this work cannot be done.

Finally yet importantly, I take this opportunity to record my sense of gratitude

to my families and friends who encourage and backing me unceasingly.

Thank you very much!

Student signature

Nguyen Vu Tuan Anh

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TABLE OF CONTENTS

LIST OF FIGURES.......................................................................................................vi

LIST OF TABLES..................................................................................................... viii

LIST OF ABBREVIATIONS .......................................................................................ix

PART I. INTRODUCTION ...........................................................................................1

1.1. Research rationale...........................................................................................1

1.2. Research objectives.........................................................................................3

1.3. The requirement..............................................................................................3

1.4. Limitattions.....................................................................................................4

1.5. The significance .............................................................................................4

PART II. LITERATURE REVIEW...............................................................................5

2.1. Theoretical basis.............................................................................................5

2.1.1. Shoreline erosion and accretion...................................................................5

2.1.2. Geographic information system (GIS).......................................................10

2.1.3. MNDWI method ........................................................................................11

2.2. Practical basis ...............................................................................................13

PART III. METHODOLOGY......................................................................................19

3.1. Material.........................................................................................................19

3.1.1. The objects.................................................................................................19

3.1.2. The scope. ..................................................................................................19

3.2. Methods. .......................................................................................................19

3.2.1 Collecting and selecting data. .....................................................................19

3.2.2 Software. .....................................................................................................20

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3.2.3. Flowchart of methodology.........................................................................20

3.3.. Image pre-processing...................................................................................21

3.3.1 Radiometric correction. ..............................................................................21

3.3.2 Geometric correction. .................................................................................22

3.4. Compute Modified Normalize Difference Water Index (MNDWI).............23

3.5. Overlay..........................................................................................................24

PART IV. RESULTS ...................................................................................................25

4.1. Result of shoreline change detection map ....................................................25

4.1.1. Radiometric correction ..............................................................................25

4.1.2 Geometric correction ..................................................................................27

4.1.3. Compute Modified Normalize Difference Water Index (MNDWI)..........28

4.1.4. Overlay .....................................................................................................30

4.2. Shoreline change mapping in research area ............................................31

PART V. DISCUSSION AND CONCLUSION..........................................................38

5.1. Discussion.....................................................................................................38

5.2. Conclusion ....................................................................................................38

REFERENCES .............................................................................................................39

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