MINISTRY OF EDUCATION
AND TRAINING
VIETNAM ACADEMY OF
SCIENCE AND TECHNOLOGY
GRADUATE UNIVERSITY OF SCIENCE AND TECHNOLOGY
-----------------------------
NGUYEN VAN DUNG
STUDY ON SOIL GEOMORPHOLOGY FOR PLANNING
AND USING LAND SUSTAINABLY IN
BAC TAY NGUYEN REGION
Major: Geography of Resource and Enviroment
Code: 9 44 02 20
SUMMARY OF DOCTORAL THESIS IN GEOGRAPHY
Hanoi - 2018
The thesis is completed at: Graduate University of Science and
Technology, Vietnam Academy of Science and Technology.
Supervisors: 1. Ph.D. Nguyen Đinh Ky
2. Assoc. Prof. Ph.D Nguyen Dich Dy
Reviewer 1: ………………………………………………
Reviewer 2: ………………………………………………
Reviewer 3: ………………………………………………
The thesis will be defended at Graduate University of Science and
Technology - Vietnam Academy of Science and Technology, at hour
……date……month ……201...
Thesis can be found in
- The library of the Graduate University of Science and Technology
- Vietnam’s National Library
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INTRODUCTION
1. The necessity of the research
Soil is a precious natural resource that most food supply to human
are derived from. V.V.Docutraev supposed that soil is an
independent natural object, formed by the interaction of parent rock/
matter, terrain, climate, organisms and time factor. These
relationships are deeply researched into such directions: soil
geomophology, soil-parent rock/material, soil-climate, soil-
organisms...In that the relationship of landforms and soils are
considered the most dynamic and complex; can be explained on the
basis of the balance between morphogenesis and pedogenesis.
In the organization of production and land use, the characteristics
of the morphopedological (MP) landscape are important for
economic efficiency and sustainability because using land, changing
vegetation triggers exogenous processes (morphogenesis) to affect
the soil cover, making it change. If the land use is suitable with the
rules of morphogenesis and pedogenesis, it is sustainable and
effective. If not, it is not sustainable and ineffective, leading to land
degradation - desertification.
Bac Tay Nguyen (BTN) region accounts for about 50% of the
total area of Tay Nguyen, including Kon Tum and Gia Lai, which
has a wide variety and diversity of soil types. It has most of groups
and major soil types of Tay Nguyen. With the characteristics of
morphopedology of mountains, high plateau, always implies the
process of natural hazards such as land degradation, landslide, floods,
drought ...
For the above reasons, the project "Study on soil geomorphology
for planning and using land sustainably in Bac Tay Nguyen region"
have been made in order to contribute to the solutions of the practical
requirements and sustainable development of Tay Nguyen.
2. Research objectives
Establishment of morphopedological units as scientific basis for
planning and using land sustainably in Bac Tay Nguyen region
3. Research implementations
- Overview of researchs of soil geomorphology in domestic and
foreign;
- Establishing theoretical basis for research of soil geomorphology
- Analyze the conditions that make up the MP landscapes in BTN
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- Build the system of classification, criteria and establishment of
MP map of Bac Tay Nguyen at the rate of 1/ 250,000;
- Analyze the morphopedological landscapes (MPL) in BTN
- Analyze, assess the MP landscapes for land use in Bac Tay Nguyen
- Proposing solutions for sustainable land use and management
from morphopedological approach in Bac Tay Nguyen.
4. Research area and object
- Research area: Bac Tay Nguyen, including Kon Tum and Gia Lai.
- Research object: geomorphology, soil in Bac Tay Nguyen region.
5. Protected points
- Correlations of geomorphology and soil in Bac Tay Nguyen are
presented characteristics, morphology of terrain and pedology, based
on morphogenesis and pedogenesis in the MP landscapes.
- Bac Tay Nguyen is divided into 12 groups, 39 types of
morphopedological landscapes, which are diverse and complex, so
planning and using land must follow this division to achieve
sustainable development and disaster prevention.
6. New points
- The thesis is the first one to assess the relations of geomorphology
and soil in Bac Tay Nguyen and present the relations on
morphopedological map with scale 1/250.000.
- Initially proposed a plan for spatial organization, planning and
using land sustainably, simultaneously warning of natural disasters
based on the analysis of characteristics, structure of
morphopedological landscap in Bac Tay Nguyen region
7. Scientific and practical contributions
- Scientific contributions: contributing to the clarification of soil
and geomorphology relationships in the tropics; and improvement of
the MP method for planning, sustainable use of land resources.
- Practical contributions: The result of the project is the scientific
basis for planning, territorial organization, sustainable use of natural
resources and natural disaster prevention; It is also important data for
soil survey and land assessment. Viewpoints and methods of the thesis
can be applied for Tay Nguyen and other areas with similar conditions.
8. The structure of the thesis
Apart from the introduction, the conclusions and
recommendations, reference and appendix, the thesis consists of 3
chapters:
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Chaper 1. Theoretical basis and research methods of soil
geomorphology in Bac Tay Nguyen
Chaper 2. Conditions of formation and characteristics of
morphopedological landscapes in Bac Tay Nguyen
Chaper 3. Assessment of morphopedological landscapes for
planning and using land sustainably in Bac Tay Nguyen
Chaper 1. THEORETICAL BASIS AND RESEARCH
METHODS OF SOIL GEOMORPHOLOGY IN BAC TAY
NGUYEN
1.1. Theoretical basis of soil geomorphology
1.1.1. Science of soil geomorphology
Each geomorphologic surface is determined by landform, age,
parent rock/material and the process of forming landform.
Geomorphology accounts for three factors in the five soil forming
factors. Therefore, soil geomorphology is mainly focused on
studying the relationship of these geomorphologic characteristics
with soil and morphogenesis with the pedogenesis.
In the perspective of geomorphology and soil, J. Tricart (1965)
theo A.J. Gerrard (1992)..., soil geomorphology is to research the
relationship of geomorphology and soil, the processes of formation
and development. It is to study the relationship of soil development
with the forming factors.
Moreover, soil geomorphology is an important research method in
re-establishing the ancient geographic environment (Gerrard, 1992;
Birkeland, 1999).
1.1.2. Overview of researchs of soil geomorphology
1.1.2.1. Overview of researchs of soil geomorphology in foreign
The relationship between relief and soil is researched very early
in the late 19th century by Russian scientists, typically V.V.
Docuchaev who studied on determining soil related to relief in small
territories. N. M. Xibirtxev (1900) developed the theory of combine
and structure and soil cover, and emphasized the terrain in creating
soil combination. X.X. Neuxtruev (1910) raised the law of evolution
and developed soil combinations corresponding to the terrain
development stages of V. Davis' diagram of terrain development .
