Application geographic information system in assessing flash flood, na ri district, bac kan province

THAI NGUYEN UNIVERSITY

UNIVERSITY OF AGRICULTURAL AND FORESTRY

NGUYEN NAM HAI

APPLICATION GEOGRAPHIC INFORMATION SYSTEM IN

ASSESSING FLASH FLOOD, NA RI DISTRICT, BAC KAN PROVINCE

BACHELOR THESIS

Study Mode: Full-time

Major : Environmental Science and Management

Faculty : Advanced Education Program

Batch : 2015 - 2019

Thai Nguyen, 09/2019

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Thai Nguyen University of Agriculture and Forestry

Degree Program Bachelor of Environmental Science and Management

Student name Nguyen Nam Hai

Student ID DTN 11554290008

Thesis title

Application geographic information system in assessing flash

flood, Na Ri district, Bac Kan province

Supervisor Dr. Nguyen Thanh Hai

Supervisor’s

signature

Abstract:

The purpose of this study is to develop a flash flood warning map in Na Ri

district, Bac Kan province to provide data and maps about the high risk areas for

flash floods. This study analyzes factors such as soil, river, vegetation, etc. in Na

Ri district

Na Ri is a hilly area with many rivers and soil being easily washed away due

to forest exploitation activities or forest felling as a residence, floods, and

landslides have continued in recent years.

Therefore, we need to develop maps that can warn the locals to help people

pay attention to vulnerable areas and take precautions before the rainy season.

Keywords

Flash flood, Na Ridistrict, Geographic Information

System (GIS)

Number of pages 39

Date of submission 07/09/2019

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ACKNOWLEDGEMENT

I would like to express my gratitude to my supervisor Dr. Nguyen Thanh

Hai, MsC. Nguyen Van Hieu, for his invaluable useful comments, remarks,

encouragement and engagement through the learning process of this graduated

thesis. I sincerely thank the lecturers who enthusiastically imparted useful

knowledge on flooding during the University program to all class attendants.

I also thank the support of Thai Nguyen University of Agriculture and

Forestry, the coordinators and program managers for their support and assistance.

Finally, I would like to express our gratitude to the family, relatives and

friends who have helped me during the internship.

Thank you very much!

Nguyen Nam Hai

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TABLE OF CONTENT

ACKNOWLEDGEMENT......................................................................................ii

TABLE OF CONTENT ........................................................................................iii

LIST OF FIGURES................................................................................................ 1

LIST OF TABLES ................................................................................................. 2

PART I. INTRODUCTION ................................................................................... 3

1.1.Research rationale ............................................................................................ 3

1.2 Research’s objectives ....................................................................................... 4

1.3 Research questions and hypotheses.................................................................. 4

1.4 Limitations........................................................................................................ 4

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

2.1. Flash floods...................................................................................................... 5

2.1.1. Definition...................................................................................................... 5

2.1.2. Classify ......................................................................................................... 5

2.1.3. Factors causing flash floods. ........................................................................ 5

2.1.4. Basic characteristics of flash floods. ............................................................ 7

2.1.5. The basic criteria for determining flash floods. ........................................... 8

2.2. Situation of flood in Vietnam and in the world............................................... 9

2.2.1 Situation of flood in the world....................................................................... 9

2.2.2 Situation of flood in Vietnam. ..................................................................... 11

2.3. Geographic Information System.................................................................... 13

2.3.1. Definition.................................................................................................... 13

2.3.2. Main factor in GIS...................................................................................... 13

2.3.3. Function of GIS .......................................................................................... 13