The dissertation has built a landscape zoning map of Ma river basin in Thanh
Hoa province, according to the two-level zoning system of landscape regions and
landscape sub-regions. The result is 3 landscape regions and 24 landscape subregions. The landscape zoning map along river basin is established according to the
traditional landscape zoning principle taking into account the watershed
characteristics. The results of the landscape zoning map show the landscape
differentiation in a horizontal structure. Subregional units are the basis for zoning
territory for the development of agricultural and forestry. The landscape zoning map
is the scientific basis for organizing specialization and development of agriculture
and forestry in Ma river basin of Thanh Hoa province
28 trang |
Chia sẻ: honganh20 | Ngày: 08/03/2022 | Lượt xem: 316 | Lượt tải: 0
Bạn đang xem trước 20 trang tài liệu Analyzing structure and function of landscape for the orientation of rational use of the territory of ma river basin (the part belong to thanh hoa province), để xem tài liệu hoàn chỉnh bạn click vào nút DOWNLOAD ở trên
west-southeast, the
depressions have decided the structure of the terrain and direction of material
transportation, the basis of differentiation of the research territory.
c. Topography and geomorphology
The terrain is quite complex, much divided and lower towards the east-west
direction. From the west to the east there are mountainous, midland, plain and coastal
terrain. In the total area of 1.061.000 ha, mountainous and hilly terrain accounts for
73.3%; plain occupies 16% and 10.7% is coastal area. The geomorphological
9
characteristics of Ma river basin are quite diversified with 4 types of topography and
30 surfaces. In mountainous areas there is a natural disruption by the height that caused
the formation of classes and subclasses of landscape, and geomorphology caused the
formation of landscape categories in the Ma river basin landscape classification system
in Thanh Hoa province.
d. Climate characteristics
The Ma river basin of Thanh Hoa province has a tropical monsoon climate with a
hot summers, heavy rains and hot dry west-winds; a cold winter with low rainfall,
frost and the northeast monsoon tends to decline from sea to land, from north to
south. The total annual average radiation is approximately 152 Kcal/ cm
2
. The
average annual sunshine hours range from 1,479 to 1,700 hours. The average annual
air temperature is 22-23
o
C. The relative humidity of the air varies between 85-86%.
The average rainfall is 1,700-2,000mm/year.
Based on the analysis the climatic factors of the Ma river basin in Thanh Hoa
province and the results of the division of climatic classification criteria, over
1,061,000 ha of natural land in the whole territory, there are 16 types of climate with
77 plots.
The differentiation of the climate of Ma river basin in Thanh Hoa province is the
cause of diverse division of the landscape.
e. Hydrographical characteristics
Water resource of the Ma River basin of Thanh Hoa province is abundant. The
total annual rainfall is 19 billion m
3
. The average module of the rivers flows is 20,4 -
38 l/s/km
2
. The flow regime is distinctly divided into the flood season and the dry
season, which closely follows the rhythm of the climate. In addition, Ma river system
(including Ma river and Chu river) also has a dense river system such as Buoi river,
Dat river, Cau Chay river, Lung river, etc.
Flows have redistributed material and energy among different terrain layers and
areas, transported and accreted sediments forming the basins, the surface of the river
terraces in the Ma river basin and contributed to the differentiation of landscape
classes. The formation and development of the landscape, especially the richness of
vegetation, is directly related to the water potential.
f. Soils characteristics
The conditions and processes of land formation of Ma river basin in Thanh Hoa
province are varied and complex which formed a land cover with 10 main soil groups
and 31 different soil types, covering an area of 991898.19 hectares. The terrain of Ma
river basin in Thanh Hoa province is diverse with many forms of terrain, in which
sloping topography is dominant. Therefore, in the process of forming and developing
landscape of the territory, the diversification of soil combined with vegetation cover
has created the diversity of landscape types.
g. Biological characteristics
The natural vegetation commonly distributed in the basin is divided into belts:
Tropical mountainous belt > 700 m on limestone; Tropical mountainous belt > 700 m
on other rocks; Tropical belt > 700 m on limestone; Tropical belt > 700 m on other
10
rocks. The vegetation covers are mainly planted forest, wet rice, fruits, annual
industrial crops and plants in residential areas.
The Ma river basin of Thanh Hoa province has a rich and diverse range of forest
fauna, including terrestrial and aquatic animals, native and migratory animals, natural
animals and pets, etc.
It is the combination of these natural and cultivated communities with soils that
are indicator of landscapes types in the Ma river basin landscape classification
system in Thanh Hoa province.
h. Other natural resources of the territory
Mineral resources are abundant and diversified, including: iron and iron alloys
with iron ore, iron-manganese and mineral sand, ferrous and precious metals, 7 mines
and lead-zinc ore points were discovered; chemical and fertilizers materials has
serpentine, raw materials for producing porcelain, glass and construction materials
with kaolin, fuel with peat, etc.
2.1.2. Characteristics of socio - economic factors in the landscape formation of
the studied territory
a. Population and labor force
By 2016, the total population in the Ma river basin of Thanh Hoa province is
about 3,712,600 people. The average natural population growth rate is 1.95%, in
which about 30% of the population live in urban areas and the rest live in rural and
mountainous areas. Crowded population has created an abundant source of labor for
the Ma river basin. By 2016, the labor force of the Ma river basin in Thanh Hoa
province is about 2,251.03 thousand, accounting for 60.6% of the population.
b. Structure and development status of economic sectors
Economic growth: Gross Regional Domestic Product (GRDP) in 2016 at the
2010 prices is estimated to increase 9.05% over the same period, of which
agriculture, forestry and fishery increased 2.52%; industry and construction
increased 11.96%; service sector increased 8.83%; import tax, product tax minus
subsidy increased 9,16%.
c. Socio-economic factors in relation to landscape formation of Ma river basin in
Thanh Hoa province
Human is increasingly impacting nature in a comprehensive and profound way,
the exploitation of natural resources for socio-economic development directly or
indirectly transformed the environment and natural components, also formed a
number of human landscapes.
2.2. Indicator classification system of landscape in Ma river basin, Thanh Hoa
province
2.2.1. Principles for the construction of landscape classification system
Building a landscape classification system must be based on the following
principles: historical perspective principles; general principles; relative uniform
principle.
11
2.2.2. Characteristics of Landscape classification units
Table 2.20. Landscape classification system of Ma river basin, Thanh Hoa province
No
Classification
level
Typical sign
Landscape classification
results
1
Landscape
system
The main radiation source
determines the zone. Moisture-heat
regime determines the intensity of
the material and energy cycles.
- The landscape system of
tropical humid monsoon
2
Landscape
subsystem
The correlation between terrain and
northeast and southwest monsoon
decides the redistribution of heat
and humidity.
- The landscape subsystem
has rainy season in summer
and autumn, cold winter
3
Landscape
type
A general characteristic of climate
determines the type of vegetation
cover and the adaptability of floral
communities due to fluctuations in
heat-moisture balance.
- The studied area has 13
landscape types
4
Landscape
class
The morphological characteristics
of the terrain define the uniformity
of two major processes in the
material cycle: abrasion and
accretion.
- Landscape class of
mountain
- Landscape class of hill
- Landscape class of plain
5
Landscape
subclass
Characteristics of morphological
survey of terrain have divided the
interior layers of the landscape class.
Demonstrating material balance
between topographic features,
climatic features and plant
communities features.
- Landscape subclass of
medium mountain
- Landscape subclass of low
mountain
- Landscape subclass of
valleys and sunken areas
- Landscape subclass of high hill
- Landscape subclass of low hill
- Landscape subclass of high plain
- Landscape subclass of low plain
6
Landscape
kind
Classified by geomorphological
criteria of soil and
geomorphological criteria of
surface sediments. In terms of
geomorphology, these are terrain
types that are divided according to
morphological - original principles;
the surface is composed by a type
or a combination of soil types and
sediment materials.
The studied area has 34
landscape kinds
7
Landscape
species
The combination of plant
communities (groups) with soil
types (groups) through human
impacts.
The studied area has 348
landscape species (in which,
there are two general types of
water surface and resident)
Thus, the landscape classification system of the Ma river basin in Thanh Hoa
province consists of 7 levels: system subsystem type class subclass
12
kind species. This is the basis for the establishment of the territorial landscape
map with the ratio of 1: 100.000.
2.2.3. Map of Ma river basin landscape in Thanh Hoa province
To establish a map of Ma river basin in Thanh Hoa province at the ratio of 1:
100,000, the PhD students have used a combination of methods. On the basis of the
available thematic maps at the same scale as geological map, geomorphological map,
topographic map, climate map, soil map, vegetation map with the ratio of 1:100,000.
Studying the attached diagrams, tables, etc, on Mapinfor and ArcMap software.
+ Landscape transection of Ma river basin, Thanh Hoa province
To clarify the differentiation of the natural and structural characteristics of the
researched territorial landscape, based on landscape maps and component maps, the
author has established 3 landscape transections: A-B; C-D; E-F.
2.2.4. Landscape classification units
- High - class landscape classification units: landscape system; landscape
subsystem;
landscape class
- Low - class landscape classification units: landscape subclass; landscape type;
landscape kind; landscape species.
2.2.5. Characteristics of landscape structure of Ma river basin in Thanh Hoa
province
a. Landscape class
- Landscape class of mountain includes medium mountain landscape subclass,
low mountain landscape subclass and valleys and sunken areas landscape subclass,
with 199 landscpae types and 900 local areas. The total area is 519.82,4 ha,
accounting for 46,8% of the natural area of the territory.
- Landscape class of hill is the transition from plain to mountainous areas, with
the height from tens of meters to 200 m, has 221.170,6 ha, accounting for 19,9% of
the natural area of Ma river basin in Thanh Hoa province.
- Landscape class of plain has 205.467,9 hectares, accounting for 18,5% of the
natural area of Ma river basin in Thanh Hoa province. The plain landscape class has
67 landscape types, beginning with landscapes class number 280 to number 346.
b. Landscape subclass
1 Landscape subclass of medium mountain 236.449,0 ha 21,3%
2 Landscape subclass of low mountain 201.772,4 ha 18,1%
3 Landscape subclass of valleys and sunken areas 81.606,0 ha 7,3%
4 Landscape subclass of high hill 164.164,8 ha 14,7%
5 Landscape subclass of low hill 14.437,9 ha 1,3%
6 Landscape subclass of high plain 57.005,8 ha 5,2%
7 Landscape subclass of low plain 191.029,9 ha 17,2%
c. Type, kind and species of landscape of Ma river basin, Thanh Hoa province
The landscape type is characterized by a type of a certain dominance vegetation
over a typical soil, developed on the same homogeneous terrain. The Ma river basin
of Thanh Hoa province has 13 landscape types.
13
Based on the division of geomorphology-soil, geomorphology-sediment surface,
the Ma river basin of Thanh Hoa province has 34 landscape kinds.
The combination of soil and vegetation forms a landscape species. The Ma river
basin of Thanh Hoa province has 348 landscape psecies.
2.2.6. Characteristics of mobile structure of the landscape of Ma river basin,
Thanh Hoa province
The seasonal rhythm of the Ma river basin landscape is closely related to the
rhythm of the climate. The change in temperature and humidity is related to the
apparent movement of the sun and the monsoon activity mechanism in Southeast
Asia printed the rhythm of the landscape in the studied territory.
2.2.7. Analyzing landscape function of Ma river basin in Thanh Hoa province
a. The basis for classifying landscape function of the studied territory
- Each landscape unit can undertake one or several functions; landscape units
can undertake the same function; landscape function is dominated by landscape
structures; landscapes differ in function and direction of use; landscapes are of
different nature in function, but for the purpose of human impacts, they have the
same direction of use.
b. Analyzing landscape function of the studied territory
The landscape of consists of the following functional groups: Productive function
group; Social function group; Ecological function group. The landscape of the Ma
river basin in Thanh Hoa province has a variety of functions.
2.3. Landscape division for agriculture and forestry development in Ma river
basin
Based on the principles of landscape zoning (section 1.2.9 page 27) combined
with the analysis of structural and functional landscape characteristics as well as the
conditions that form landscape units. The study territory is divided into 3 landscape
regions and 24 landscape sub-regions.
CHAPTER 3
ORIENTATION OF RATIONAL USE OF THE TERRITORY
OF MA RIVER BASIN, THANH HOA PROVINCE
3.1. Landscape assessment to serves the orientation of rational use of
territory for agriculture and forestry development in Ma river basin Thanh Hóa
province
3.1.1. Steps to assess the landscape Ma river basin Thanh Hóa province
Based on the researches of geographers from Russia - Eastern Europe and
Vietnam such as general assessment model for the territories of L.I. Mukhina (1970),
A.M. Marinhich (1970), P.G. Sisenko, Pham Hoang Hai (1997), Nguyen Cao Huan
(2005), the author generalized the content of the general assessment process.
The assessment results show that the higher the point of the landscape, the more
favorable the landscape for a production sector.
3.1.2. Principles and methods of landscape assessment
The principle of landscape assessment is through the characteristics of the
subject, corresponding to them is the component characteristics of the object to
14
determine the appropriateness of landscapes for each manufacturing industry and
economic sector.
3.1.3. Selection of evaluation units
- For agriculture are landscapes with the biological function previously analyzed.
For the purpose of protection forest development, the landscape selected was
landscapes with the dominant function of ecological function group, with the
common slope of above 25º; for the purpose of developing production forests, the
landscapes are functional in two groups of ecological and living mass functions, with
the dominant slope from 8-15º; for the purpose of conserving, selected landscapes
belong to ecological and social function groups.
3.2. Developing a system of landscape assessment indicators for the purpose
of developing economic production sectors in the research territory
3.2.1. Principles for selection and classification of evaluation criteria
The selected indicators must have a clear differentiation according to territorial
units in the research ratio; the selected criteria must clearly affect the development
object; the number of selected and graded indicators may be much or less different.
3.2.2. Adaptation evaluation for groups of food crops, annual industrial crops,
and fruit trees
- Food crops group: the research territory has a big population, so the issue of
ensuring food for the resident is a top task; annual industrial crops group: this group
of trees plays an important role in the lives of mountainous people, especially
sugarcane; fruit trees group: the territory of Ma river basin of Thanh Hoa province
has great potential for planting fruit trees.
Table 3.1. Classification of adaptation level for 3 groups of agricultural crops
Crops Element
Adaptation level
Highly suitable
S1 (3 mark)
Suitable
S2 (2 mark)
Lowly Suitable
S3 (1 mark)
Food
crops
group
Soil type
Pb, Pk, Pg, Pf, Pj,
Py, D
B, Bq, S, Smi, Fs, Fl,
Fv, Fq, Fp
Fa, Rv, Rr, Mm, M,
Mi, C
Slope < 3o 3o - 8o 8o - 15o
Thickness > 100 50 - 100 <50
Composition of
soil mechanics
moderate rich soil Rich soil
slightly rich soil;
Miscellaneous sand
Temperature >= 23oC 20oC - 23oC 18 - 20o
Rainfall > 2.000 1.500 - 2.000 < 1.500
Number of cold
month 2 3 >=4
Water source Take initiative Near water source Limited irrigation
Annual
industrial
crops
group
Soil type Fl, Fv, Fp, Pk, Pf, D B, Bq, Fk, Fs, Fq Fa, Rr, Pb, Pg, Pj, Py.
Slope < 3o 3o - 8o 8o - 15o
Thickness > 100 50 - 100 < 50
Composition of
soil mechanics
moderate rich soil Rich soil
slightly rich soil;
Miscellaneous sand
Temperature >= 23oC 20oC - 23oC 18 - 20o
Rainfall > 2.000 1.500 - 2.000 < 1.500
15
Number of cold
month 2 3 >= 4
Water source Take initiative Near water source Limited irrigation
Fruit trees
grou
Soil type Fs, Fl, Fv, Fq, Fp, D B, Bq, Fq, Fa, Rv, Rr
Fa, Pk, Pf, Pb, Pg, Pj,
Py,
Slope < 3o 3 - 8o 8o - 20o
Thickness > 100 50 - 100 < 50
Composition of
soil mechanics
moderate rich soil Rich soil
slightly rich soil;
Miscellaneous sand
Temperature >= 23oC 20oC - 23oC 18 - 20o
Rainfall > 2.000 1.500 - 2.000 < 1.500
Number of cold
month 2 3 >= 4
Water source Take initiative Near water source Limited irrigation
- Determining mark of indicators: The results show that for crop groups: the type
of soil with the highest mark. Calculation of CR for 3 crops group is < 0.1 so these
marks are accepted.
Table 3.6. Determination of the adaptation level of 3 crop groups
Crop group Dmax Dmin D
Adaptation level
Highly suitable Suitable Lowly suitable
Food crops 0,375 0,172 0,067 0,308 - 0,375 0,240 - 0,307 0,172 - 0,239
Annual industrial crops 0,375 0,202 0,057 0,318 - 0,375 0,260 - 0,317 0,202 - 0,259
Fruit trees 0,376 0,176 0,066 0,310 – 0,376 0,243 - 0,309 0,176 - 0,242
Classifying the adaptability of landscape types for each crop group
Table 3.8. Classification results of the adaptability of the landscape to the food crops group
No Adaptation level Landscape type Area (ha)
Rate
(%)
1
Highly suitable
(63 landscape
types)
54, 57, 58, 80, 95, 100, 103, 120, 123, 124, 125,
126, 162, 173, 174, 175, 177, 180, 181, 183, 184,
189, 190, 192, 193, 196, 197, 213, 224, 231, 233,
235, 236, 237, 238, 250, 259, 282, 286, 287, 289,
293, 295, 296, 297, 298, 302, 303, 304, 306, 308,
309, 312, 322, 335, 336, 337, 339, 340, 341, 343,
344, 345.
205.838,9 19,4
2
Suitable (40
landscape types)
15, 16, 47, 53, 56, 65, 67, 96, 107, 134, 137, 150,
163, 168, 179, 206, 220, 221, 222, 249, 271, 285,
288, 290, 291, 299, 301, 307, 310, 311, 315, 316,
317, 318, 325, 327, 328, 329, 331, 333.
67.830,5 6,4
3
Lowly suitable (
18 landscape
types)
10, 50, 66, 69, 74, 84, 90, 132, 144, 148, 156, 161,
186, 205, 242, 245, 332, 338. 27.039,8 2,5
4 Not suitable (228 landscape types) 760.290,7 71,7
Total 348 1.061.000 100,0
Table 3.10. Classification results of the adaptability of the landscape to the annual
industrial crops group
No Adaptation level Landscape type Area (ha)
Rate
(%)
16
1
Highly suitable
(22 landscape
types)
80, 100, 103, 120, 124, 162, 173, 174, 175, 189,
200, 224, 250, 255, 259, 260, 263, 276, 314, 320,
321.
41.617,2 3,9
2
Suitable (31
landscape types)
15, 16, 47, 54, 56, 58, 65, 67, 95, 96, 107, 123,
125, 126, 134, 137, 150, 168, 177, 197, 236, 237,
252, 254, 256, 258, 261, 262, 265, 277, 281.
40.994,04 3,8
3
Lowly suitable (
7 landscape
types)
66, 84, 90, 148, 179, 245, 275.
9.998,2 0,9
4 Not suitable (288 landscape types) 968.390,6 91,3
Total 348 1.061.000 100,0
Table 3.12. Classification results of the adaptability of the landscape to the fruit tree
group
No
Adaptation
level
Landscape type Area (ha)
Rate
%)
1 Highly suitable
(13 landscape
types)
54, 67, 96, 173, 162, 173, 174, 189, 197, 224, 237,
250, 259. 25.149,6 2,4
2 Suitable
(14 landscape
types)
15, 56, 112, 134, 149, 169, 188, 202, 209, 210,
212, 236, 247, 268. 45.936,9 4,3
3 Lowly suitable
( 11 landscape
types)
94, 106, 114, 118, 160, 172, 191, 214, 217, 241,
274. 50.938,5 4,8
4 Not suitable (310 landscape types) 938.974,9 88,5
Total 348 1.061.000 100,0
3.2.3. Evaluation of adaptability for protection and production forests
For special use forests, the function is conservation. In the research area, there are
53 types of landscapes with 131,744.22 hectares, accounting for about 12.4% of the
territory, consists of two national parks and four nature reserves. Special-use forest is
a type of forest that uses landscape in a typical way and is strictly preserved;
therefore, the dissertation only evaluates the type of landscape use for forestry
through protection forests and production forests.
* Selecting and classifying evaluation criteria for protection and production
forests
Table 3.13. Classification of adaptive criteria for forest types in the territory of Ma
river basin in Thanh Hoa province
Type of
forest
Element
Adaptation levels
Highly suitable S1
(3 mark)
Suitable S2
(2 mark)
Lowly suitable S3
(1 mark)
Protection
Forest
Location of
protection
Watershed and coastal
location
Slope area, near the basin Valley
Terrain
Medium mountain &
low mountain, littoral
Hill, valley Hill
Slope > 25o , < 3o 15 - 25o 8o -15o
Soil type
Hk, Ha, Hs, Hq, Fk, Fs,
Fv, Fa, Fq
B, Bq, Mm, M, Smi, Fl,
Fp, Rr, Cc
Pk, Pg, Pf, Pj, Py,
D, E, núi đá
17
Thickness > 100 m 50 - 100 m < 50 m
Rainfall > 2.000 mm 1.500 - 2.000 mm < 1.500 mm
Vegetation
Evergreen hermetic
forest
Artificial forest,
mangroves forest
Grass-plot, shrubs
Production
forest
Slope 8o - 15o 15 - 25o > 25o
Terrain Hill, valley
Medium mountain & low
mountain
Hill and littoral
Soil type
Hk, Ha, Hs, Hq, Fk, Fs,
Fv, Fa, Fq
B, Bq, Mm, M, Smi, Fl,
Fp, Rr,
Pk, Pg, Pf, Pj, Py,
D, E, Cc, núi đá
Thickness > 100 m 50 – 100 m < 50 m
Rainfall > 2.000 mm 1.500 - 2.000 mm < 1.500 mm
Vegetation
Evergreen hermetic
forest
Artificial forest,
mangroves forest
Grass-plot, shrubs
* Determining mark of elements: The protection forest has the highest mark ( k =
0,224); with production forest, the terrain has the highest mark (k = 0,259).
Calculation of CR for 2 types of forest is < 0.1 so these marks are accepted.
Table 3.18. Range of mark and adaptive levels of two types of forest
No Type of forest Dmax Dmin D
Adaptation levels
Highly suitable Suitable Lowly suitable
1 Protection forest 0,431 0,174 0,085 0,346 - 0,431 0,260 - 0,345 0,174 - 0,259
2 Production forest 0,447 0,166 0,093 0,354 - 0,447 0,260 - 0,353 0,166 - 0,259
Classifying the adaptability of landscape types for each type of forest.
Table 3.20. Classification results of the adaptation level of the landscape to the
protection forest
No Adaptation level Landscape type Area (ha)
Rate
(%)
1
Highly suitable
(30 landscape
types)
2, 9, 12, 14, 27, 39, 41, 42, 55, 56, 75, 77, 79, 82,
85, 88, 91, 93, 99, 104, 108, 109, 119, 137, 209,
214, 217, 266, 269, 274.
66.311,1 6,3
2
Suitable
(74 loại landscape
types)
5, 6, 8, 11, 15, 17, 18, 21, 22, 23, 24, 25, 26, 28,
32, 33, 36, 43, 54, 76, 78, 81, 83, 86, 87, 89, 92,
96, 101, 102, 106, 117, 134, 139, 149, 160, 165,
170, 173, 174, 176, 182, 185, 195, 197, 199, 219,
220, 223, 224, 228, 232, 234, 236, 237, 239, 241,
248, 250, 253, 259, 264, 267, 270, 272, 273, 278,
279, 292, 323, 324, 326, 330, 346.
199.860,1 18,9
3
Lowly suitable
( 18 landscape
types)
166, 167, 171, 178, 187, 194, 198, 230, 251, 257,
280, 284, 294, 305, 313, 319, 334, 342. 38.104,7 3,5
4 Not suitable (226 landscape types) 756.724,1 71,3
Total 348 1.061.000 100,0
Table 3.22. Classification results of the adaptation level of the landscape to the
production forest
No Adaptation level Landscape type Area (ha)
Rate
(%)
1
Highly suitable
(27 landscape
59, 60, 64, 67, 72, 77, 114, 127, 130, 133, 135,
136, 137, 140, 149, 160, 189, 200, 208, 209, 214,
99.151,4 9,4
18
types) 216, 217, 241, 242, 243, 274.
2
Suitable (39
l
Các file đính kèm theo tài liệu này:
- analyzing_structure_and_function_of_landscape_for_the_orient.pdf