Temporal Infiltration Characteristics Of Soil Under Different Ages Of Acacia Plantation Forest In Luong Son Headwater Hoa Binh Viet Nam

MINISTRY OF AGRICULTURE AND RURAL DEVELOPMENT

VIETNAM NATIONAL UNIVERSITY OF FORESTRY

STUDENT THESIS

TEMPORAL INFILTRATION CHARACTERISTICS OF SOIL UNDER DIFFERENT

AGES OF ACACIA PLANTATION FOREST IN LUONG SON HEADWATER,

HOA BINH, VIETNAM

Major: Advanced Curriculum in Natural Resources Management

Code: D850101

Faculty: Forest Resources & Environmental Management

Student: Dang Thi Thanh Hoa Student ID: 1553090300

Class: K60A - Natural Resources Management Course: 2015 – 2019

Advanced Education Program

Developed in Collaboration with Colorado State University, USA

Supervisor: Assoc. Prof. Bui Xuan Dung

Hanoi, 2019

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ACKNOWLEDGEMENT

First of all, I would like to express my trustworthy respect to my supervisor –

Assoc. Prof. Dr. Bui Xuan Dung for his enthusiastic support with invaluable comments.

Additionally, I appreciated the support of other lectures during the time I analyzed the data.

Furthermore, I also thank to my friends when I started to set up in the field to collect

and during the time I analyzed data. They always give me the support whenever I needed

regardless of hardship.

Finally, I respected local people who own the Acacia plantation model for allowing and

provided me detailed information to conduct this research in this site and.

Hanoi, September 2019

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TABLE OF CONTENT

ACKNOWLEDGEMENT...................................................................................................... i

TABLE OF CONTENT ........................................................................................................ ii

LIST OF TABLE................................................................................................................. iv

LIST OF FIGURE ................................................................................................................ v

ABSTRACT ......................................................................................................................... 1

CHAPTER I.......................................................................................................................... 2

INTRODUCTION ................................................................................................................ 2

CHAPTER II ........................................................................................................................ 5

GOALS AND OBJECTIVES................................................................................................ 5

2.1. Goal............................................................................................................................... 5

2.2. Objectives .................................................................................................................. 5

CHAPTER III....................................................................................................................... 6

STUDY SITE AND METHODS........................................................................................... 6

3.1. Study site ....................................................................................................................... 6

3.2. Methods....................................................................................................................... 10

3.2.1. Temporal infiltration measurement............................................................................ 10

3.2.3. Soil properties........................................................................................................... 13

CHAPTER IV..................................................................................................................... 16

RESULTS AND DISCUSSIONS........................................................................................ 16

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4.1. Soil infiltration characteristics at different ages of Acacia plantation ............................ 16

4.1.1. Infiltration rate at different ages of Acacia plantation forest...................................... 16

4.1.2. Initial and stable infiltration rate of soil under six conditions.................................... 23

4.1.3. Total water infiltration in 1 hour............................................................................... 28

4.2. Impact factors on Infiltration characteristics at different ages of Acacia plantation ....... 30

4.2.1. Soil physical and vegetation characteristics at different ages of Acacia plantation ..... 30

4.2.2. Affecting factors on soil infiltration at different ages of Acacia plantation ................. 38

CHAPTER V...................................................................................................................... 45

CONCLUSION................................................................................................................... 45

5.1. Conclusion ................................................................................................................... 45

5.2. Limitations................................................................................................................... 46

5.3. Recommendations........................................................................................................ 46

REFERENCES ................................................................................................................... 48

APENDIX .......................................................................................................................... 51

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LIST OF TABLE

Table 3.1. Data of infiltration in different ages Acacia Forest………………………..………..12

Table 3.2. Information of Survey plots.....……………………………………………….……12

Table 4.1. Summary of the paired mean comparison of initial rate and stable rate at different

ages of Acacia plantation……………………………………………………………….……..27

Table 4.2. Vegetation characteristics at different ages of Acacia Plantation…..……………....29