Conference PaperPDF Available

ASSESSING THE SITUATION OF COASTAL EROSION, ESTUARY GATHERING IN QUANG BINH PROVINCE

Authors:

Abstract

By applying GIS, methods of studying shoreline changes in coastal areas, methods of assessing topographic changes in coastal areas and investigating and surveying in the process of studying coastal erosion and estuary accretion in Quang Binh province. From 1976 to 2019, there were about 32 sections of bank erosion. However, at estuaries (Ron river mouth, Gianh estuary, Nhat Le estuary), the situation of sedimentation takes place seriously. Greatly affects the situation of going in and out of the anchorage areas of fishing vessels and inland waterway traffic of the province. The results of analysis of Landsat remote sensing images in the period 1976 - 2019 show that the trend of landslides and accretion at the estuary and coast of Quang Binh is also very complicated. In which, the total area of erosion on both sides of Nhat Le estuary over stages is more than 20.8 ha, with the length of the place with the strongest erosion up to more than 150.8 m. This has greatly affected the beaches on both sides of Nhat Le estuary. Nhat Le estuary tends to fill up, creating bottlenecks at the river mouth, causing difficulties for flood drainage and navigation.
INNOVATIVE GEOSCIENCES,
CIRCULAR ECONOMY AND SUSTAINABILITY
International Symposium
HANOI GEOENGINEERING 2022
INNOVATIVE GEOSCIENCES, CIRCULAR ECONOMY
AND SUSTAINABILITY
11-12 February 2022
Organized by:
Supported by:
ADVISORY COMMITTEE
ORGANIZATION COMMITTEE
SYMPOSIUM SECRETARIAT
TABLE OF CONTENTS
SECTION 1: SUSTAINABLE NATURAL RESOURCES FOR CIRCULAR ECONOMY
viii
SECTION 2: EARTH AND GEOENGINEERING GEO-ECOLOGICAL ECHNOLOGIES
FOR CIRCULAR AND ECOLOGICAL ECONOMY
ix
SECTIONS 3: SOLUTIONS FOR CIRCULAR ECONOMY AND SUSTAINABILITY
MULTISECTOR COLLABORATION TO ADDRESS A WICKED
x
xi
xii
PREFACE
2
144
ASSESSING THE SITUATION OF COASTAL EROSION,
ESTUARY GATHERING IN QUANG BINH PROVINCE
Cham Dao Dinh 1,2, Son Nguyen Hoang3,4,
Quan Nguyen Trong4, Hang Phan Anh5
1Institute of Geography, Hanoi, Vietnam
2Graduate University of Science and Technology, Hanoi, Vietnam
3Open Education and Information Technology, Hue University, Thua Thien Hue provice, Vietnam
4University of Education, Hue University, Thua Thien Hue Provice, Vietnam
5University of Science, Hue University, Thua Thien Hue Provice, Vietnam
Corresponding author: nhsonsp@hueuni.edu.vn
Abstract: By applying GIS, methods of studying shoreline changes in coastal areas, methods of
assessing topographic changes in coastal areas and investigating and surveying in the process of
studying coastal erosion and estuary accretion in Quang Binh province. From 1976 to 2019, there
were about 32 sections of bank erosion. However, at estuaries (Ron river mouth, Gianh estuary, Nhat
Le estuary), the situation of sedimentation takes place seriously. Greatly affects the situation of going
in and out of the anchorage areas of fishing vessels and inland waterway traffic of the province. The
results of analysis of Landsat remote sensing images in the period 1976 - 2019 show that the trend of
landslides and accretion at the estuary and coast of Quang Binh is also very complicated. In which,
the total area of erosion on both sides of Nhat Le estuary over stages is more than 20.8 ha, with the
length of the place with the strongest erosion up to more than 150.8 m. This has greatly affected the
beaches on both sides of Nhat Le estuary. Nhat Le estuary tends to fill up, creating bottlenecks at the
river mouth, causing difficulties for flood drainage and navigation.
Keywords: Coastal erosion; Estuary accretion; Quang Binh; Nhat Le estuary.
The issue of changes in the estuary and coastal areas has been a matter of concern
for a long time. Many theoretical studies on the estuarine dynamics regime have appeared
over the past century and started with the work of Leconte (1905), Ippen, A.T (1996),
established the interaction relationship between rivers and seawater. Theories on
hydrological nets and interactions between rivers and seas have deeply evaluated the
dynamic characteristics of hydrological networks, the main dynamic characteristics in
different estuarine regions, taking into account human activities. (T. Elliot et al., 1953),
Bijker EW (1971), and Coleman JM's (1971) research on sediment dynamics, suspended
sediment movement, and displacement in the estuary area (T. Elliot et al., 1953) 1975),
Graf.WH and Karim (1993); Leo Van Rijn (1993), Kondratrev, N.I and Makaveev (2003).
Vietnam has a coastline of about 3,260 km, which is excellent potential for
developing multi-sector such as waterway transport, processing industry, tourism,
fisheries... This is the premise for successfully implementing the maritime economic
development strategy mentioned in Directive 20-CT/TW of the Politburo of the Central
Committee of the Communist Party of Vietnam. "Striving to become a strong maritime
country is a strategic goal stemming from the requirements and objective conditions of
the cause of national construction and defense". Besides the advantages of socio-economic
145
development, the situation of accretion changes in many estuaries. Especially the coastal
strip of estuaries in the Central region, causing significant difficulties for boats to travel,
avoid storms, and environmental pollution in many sea areas, losing the poetic beauty of
tourist areas and beaches such as Do Son, Sam Son, Vung Ang, Nhat Le, Cua Tung,
Thuan An, Cua Dai - Hoi An, Nha Trang... Along with accretion, coastal erosion and
estuary erosion occurred in many places, causing many houses and infrastructure to be
dumped into the sea. Coastal erosion in many areas has denied the merits of generations
of contributing efforts, money, and even lives to build a reasonably solid sea dyke,
running along the length of our country's coastline. The sea dike sections are being
seriously eroded: Hai Hau, Hau Loc, Hoa Duan, Phuoc The, Doi Duong, La Gi, Go Cong
Dong, Phu Thanh, Ganh Hao...
Quang Binh is one of the provinces with a coastline of 116.04 km. This is where
erosion and accretion of estuaries and coasts are among society's most profound and
pressing problems. The phenomenon of erosion and accretion always takes place with
increasing intensity and frequency, on the one hand causing significant loss of land,
property, and human life, on the other hand, seriously hindering the exploiting and
developing marine economic potential. Therefore, it is necessary to have an accurate and
scientific assessment of the current status of coastal erosion and estuary accretion in
Quang Binh province. From there, give appropriate solutions to prevent and minimize
damage caused by coastal erosion and estuary accretion. By using the method of studying
the shoreline change in the coastal area, the method of assessing the topographic change in
the coastal area combined with the actual investigation. At the same time, on the basis of
analyzing remote sensing images SPOT, Landsat 7, Landsat 8 in the period 1976 - 2019 to
assess the current situation of coastal erosion and estuary accretion in Quang Binh province.
We use Landsat 8 images taken in April 2019 (radiometrically calibrated top-of-
atmosphere (TOA) reflectances (Level 1)) corrected based on a 1:10,000 base
topographic map published by the Department of Mapping, Ministry of Natural
Resources and Environment in 2010. The Landsat images of 1976, 1989, 2000, 2009 are
corrected against the Landsat 8 image (2019). This facilitates the process of overlaying
the overlapping maps for a more accurate assessment of shoreline variability. The grid
images and maps are UTM zone 48, coordinate system WGS84. The global error of the
registered image must be less than one pixel to be selected, if the error is greater than one,
it will proceed to reselect the control points until the requirements are met.
146
Landsat images are enhanced with image quality, transforming the original image into
a new image to represent the image more clearly or create emphasis on objects of interest.
The image after enhancement will make the visual interpretation or processing by machine
more efficient and accurate. This action helps to highlight the image so that the interpreter
is easier to read and identify the content on the image than the original image.
Conduct semi-automatic shoreline digitization on remote sensing images in 1976,
1989, 2000, 2009, 2019 of the study area. The digitized shoreline maps are then
superimposed to assess shoreline changes in the coastal area of Quang Binh province,
especially in the estuaries.
A digital depth model (DEM) is a numerical model of the continuously varying
elevation or depth of terrain at any given location on the earth's surface. In terrain change
assessment, DEM is built from isodepth data and measured depth using irregular
triangular projection (TIN) method. In order to achieve the highest accuracy in the study,
a digital depth model was built with a cell size value of 10.0 m, corresponding to the scale
in building iso-depth maps of 1:10,000.
From the DEM model built based on the results of the surveys, continue to use the
subtraction between the pixel values of the DEMs to find out the variation of the bottom
topography over the seasonal periods and by year in the study area. On that basis, the
variation of bottom topography can be quantified, including: maximum accretion value,
maximum erosion value, average erosion value and sedimentation volume for an area.
This method is used to study and survey new data for the research process, such as
topographic, geological, sedimentary, and hydrological data on the river system. Data is
measured and altered in accordance with established specialist procedures and guidelines.
The survey was carried out in multiple phases, with line and feature measurements
to augment papers and check the research conclusions. We survey more frequently in
locations prone to erosion, accretion, and high-risk zones. The findings of the
measurements and surveys will be used to supplement data to accurately analyze the
present state of coastal erosion and estuarine accretion in Quang Binh province, as well
as the current state of coastal erosion and estuarine sedimentation impacts on people's
lives. The survey results are also helpful information for proposing appropriate solutions
to the problem of coastal erosion and estuary deposition in Quang Binh province.
We also conduct surveys and interviews with residents of the research region and
local officials. Slovin's (1984) formula was used to establish the sample size for the study
and interviews: n = 𝑁
1+𝑁∗𝑒2, where: n is the survey sample size, N is the total sample size,
and e is the allowed standard error (5%).
147
All materials collected in the study were classified, statistical, and edited. The data
on water level, topography (section, plan) are synchronously processed and brought to
the same national elevation system. Map data, remote sensing images are also processed
and brought to the same reference system for analysis and comparison. The data used in
the study include:
- Map and topographic data: Data collected Map data from the Mapping Department
of the Ministry of Natural Resources and Environment. Including: Topographic map on
land (land) in Quang Binh province, scale 1:50,000; Topographic map of the seabed in
Quang Binh province, scale 1:50,000; Terrain map of Quang Binh province, scale
1:10,000; Scale map of 1:5,000 Nhat Le estuary on land and underwater, surveyed by
Vietnam Institute of Water Resources in 2009. Satellite image data: using free satellite
image sources Landsat7, Landsat 8 with resolutions of 30 m, 15 m combined with some
SPOT images with a resolution of 6 m taken between 1976 and 2019.
- Meteorological and hydrological data: Meteorological data (day rain, hourly rain,
humidity, evaporation, temperature); Hydrological data (water level, discharge,
sediment); Hydrographic data (waves, winds, currents). The hydrometeorological data
series of stations on the basin is relatively good, many stations have complete and
continuous data series with data series from the years 1976 - 2019. We carried out
topographic and hydrographic measurements for the Nhat Le estuary in Quang Binh
province: 2 hydrographic measurements, 2 coastal hydrographic measurements with 2
measurements in May and October 2018.
- Geological data: The geological documents of the area have been published such
as geological maps of 1:200,000 scale, geological formations from Quang Binh to Thua
Thien Hue. We have taken more than 200 samples of surface sediments on the seabed
and in estuaries at Nhat Le estuary for research.
In recent years, Quang Binh has been one of the localities with the most complicated
and fierce phenomenon of coastal erosion and accretion and changes in estuary channels.
Under the influence of hydrodynamic factors, lithospheric and human activities, erosion
and accretion phenomena occur continuously with different levels in both space and time.
According to survey data from 1980 to 2020, there are about 32 parts of the coastline
in Quang Binh province that have been eroded (Quang Trach 3 sections, Bo Trach 10
sections, Quang Ninh 6 sections, Le Thuy 5 sections, and Dong Hoi city eight sections)
with different erosion rates and lengths. The northern coast of Gianh estuary is eroded
with an average speed of 2-3 m/year over a length of nearly 2,000 m, and over the past
148
30 years, the sea has encroached on the mainland about 50 - 70 m. The vital erosion section
in Dong Duong village, Canh Duong commune (Quang Trach), has a length of about
3,000 - 4,000 m, with an erosion rate of 3-5 m/year. From 1976 to 1993, the sea penetrated
the mainland up to 300 m, collapsing three blocks of people's houses. The phenomenon
of coastal erosion in Ly Hoa (Bo Trach district) has increased sharply in recent years with
an erosion rate of over 5 m/year with a total length of eroded coastlines of about 3,200 m.
As a result, from 1980 onward, the sea has encroached on the mainland from 150-200 m,
leading to blockhouses and wells built a few decades ago lying close to the sea's edge...
Most recently, strong landslides occurred in the area from in front of Nhat Le border
station to the front of Muong Thanh hotel, about 1,500 m long. The phenomenon of severe
landslides, changes in the flow, and landslides encroached on the shore from 7 m to 10 m
deeper than before, creating sand cliffs about 2.0 m high separating the shore and the sea.
Although the locality has built several welding mines to prevent erosion due to large
waves and strong currents, the current situation of landslides continues to occur. The
section from before Truong Phap monument to adjacent to Nhat Le 2 beach is about 700 m
long; landslides encroached on the shore from 6 m to 10 m deeper than before. Creating
sand cliffs about 2.0 m high, steeper than before, deep sand is not safe for swimming.
Currently, landslides continue to occur in the My Canh sand cape area (Bao Ninh ward);
the amount of sand has dropped a lot, exposing the entire embankment by the Truong
Thinh Group Joint Stock Company. They are causing the risk of collapse of the existing
dam, closer to the deeper water bank, unsafe.
Although the coast is constantly eroded and tends to be more complicated, at
estuaries, sedimentation takes place seriously. It dramatically affects the situation of
entering and leaving the anchorage areas of fishing vessels and inland waterway traffic
of the province. The estuaries of Ron river, Gianh estuary, Nhat Le estuary are often filled
up, causing many boats to run aground or sink when passing through here. The mouth of
the Ron River is the anchorage of nearly 1,000 vessels in the communes of Quang Phu,
Quang Dong, Canh Duong, and Quang Xuan. Only small-capacity ships are anchored;
the rest must be anchored at Gianh estuary (dredged) several tens of kilometers away.
Harmful, costly to the people, and services must also be stopped or restricted. Likewise,
over the past ten years, and has continuously filled up Nhat Le estuary. According to
preliminary statistics of Nhat Le Border Guard Station, every year at Nhat Le estuary,
there are 8 - 15 boat accidents: In 2014, there were 13 cases of shipwreck and shipwreck;
In 2015, there were 5 cases... This is a very urgent problem that the locality has not found
a suitable solution to overcome the limitation.
The analysis results of Landsat remote sensing images over the period 1976 - 1995,
1996 - 2005, and 2006 - 2019 show that the trend of accretion/erosion changes in the
estuary and coastline of Quang Binh (Figure 1).
149
150
The period from 1976 to 1995: At Gianh estuary, both the north and south shores
accreted a very large amount with a very high average rate of change up to 11.2 m/year.
The period from 1996 to 2005, in contrast to the period before this period began to
experience intense erosion, the maximum erosion rate was up to 23.26 m/year. From 2006
to the present: the shoreline is restored at a rate of 25.39 m/year.
From 1976 to now, the Nhat Le estuary area has been almost unstable. From 1976 to
1995, in the area north of the gate, a large part of the mouth was eroded at a speed of more
than 20 m/year. Still, a few years later, from 1996 to 2005, the shoreline showed signs of
recovery; the most significant recovery position was up to 50 m/year. From 2006 up to
now, the northern shore area tends to erode again at a rate of nearly 40 m/year.
151
The image of the shoreline of Ron estuary from 1989 - 2019 shows that the estuary
is constantly changing. From 1989 to 2011, the north bank's sand bar was shortened by
nearly 600 m, along with that 400 m northward shift in the south, creating the shape of a
new estuary. From 2011 to now, the two banks have tended to move back to the south
150m. The change of shoreline at the mouth of Ron is very complicated, significantly
affecting waterway traffic.
Ly Hoa estuary is a small estuary located 9 km south of Gianh estuary; because the
discharge from the river is minimal, the sea mainly influences the estuary. From 1989 to
1995, Ly Hoa gate moved to the south by 500 m; by 2000, the gate tended to move to the
north by 1 km. Then from 2000-2011, the entrance moved to the south by 1km, and since
then, the gate has remained almost unchanged, only moving 15-20 m, minimal and
insignificant.
Cua Dinh is a very small estuary. In the years of small floods, the estuary was almost
filled up; In the years of great floods, the estuary is reopened. From 2000 to 2011, the
river mouth moved 200 m south. From 2011 to now, the door has been almost stable, no
longer hiding or moving like in previous years.
In terms of altitude, out of the total length of the coastal dune strip of 114.6 km, there
are up to 35.7 km of dunes close to the sea with elevations above +5.0 m. This is equivalent to
the design elevation of current sea dykes in the Central region (design elevation of sea dykes
corresponding to Category 9 storms and 5% tidal frequency in the range from +4.0 to + 5.0 m).
This is an essential natural sea dyke that plays a role in preventing storms, waves, wind,
tides, and rising water, ensuring safety for residential areas and coastal infrastructure.
The width of the strip of dunes close to the sea has quite a wide variation; in the
northern districts of Quang Trach, Bo Trach, and Dong Hoi, in many areas, the width of
the dunes is approximately or over 1 km. The largest is the dune in Bao Ninh commune
(Dong Hoi city), where almost 100% of the natural area is the dune area.
Considering the typical cross-section and topographical description of the coastal
areas of Quang Binh, the following general observations are made about the topographical
features of the coastal sandy area of Quang Binh. Near the sea are dunes that run
continuously, the peak elevation of the dune strip next to the ocean varies from +4.5 to +24 m,
the highest elevation of the dune strip near the sea is the largest in Quang Trach districts
(+24 m), Dong Hoi (+22 m) and Le Thuy (+13 m) and quite close to the sea.
152
Following the strip of dunes close to the sea are low, relatively flat sandy areas, and
most of the residential, farming, and infrastructure areas currently exist in this area.
Therefore, the dunes that run close to the sea are sea dykes protecting the residential areas.
Far from the sea is an area with many dunes; dunes are scattered and discontinuous
(except for the coastal area of Bao Ninh commune, Dong Hoi city, which is entirely
dunes). Located 1.2 to 2.5 km away from the sea, these discontinuous dunes and dunes
can hardly be considered natural sea dikes because it is pretty far from the sea and is
behind residential areas that need to be protected.
Quang Trach district: The dunes in Quang Trach district also have the phenomenon of
dunes shifting according to the Lao wind and Northeast monsoon, moving to the mainland,
sometimes moving to the sea. In Canh Duong commune, the phenomenon of low-lying
dunes along the coast has been happening for many years. On a length of 1.2 km in Dong
Cang village, Yen Hai, Trung Vu, many houses had to be relocated due to landslides.
153
The dunes in Quang Hung, Quang Xuan, Quang Tho, and Quang Phuc communes
all have annual displacement, but the coastal dune strip erosion is the strongest. Affecting
people's lives the most are in Quang Xuan and Quang Phuc areas. Typically, the landslide
154
area of 300 m in Tan My and more than 500 m in Cua hamlet has been encroached on by
the sea for nearly 500 m.
Bo Trach district: In general, the dunes in Bo Trach district fluctuate mainly in the
areas near the river mouth. Typically, the area near the mouth of Gianh river, Ly Hoa
river, is due to flood or storm surges.
The area of Ly Hoa estuary that the river mouth has eroded has been built with a
protective barrier. Within the district, only the dune strip in the Hai Trach area has been
strongly eroded over 1.5 km and has occurred continuously. In the last 5-7 years, the coast
has been encroached on nearly 400 m, causing many houses to be relocated.
Dong Hoi City: The dunes in this area are stable under the influence of nature but
have been changed a lot because of the exploitation of economic sectors.
Quang Ninh district: The dunes in the whole Hai Ninh commune have been relatively
stable in recent years.
Le Thuy district: In the past few years, coastal erosion along the dunes in Le Thuy
district has not changed much, generally stable under the influence of sea waves. Today's
most pressing problem is the phenomenon of sand flowing, sand filling from the dunes
close to the sea into the fields, affecting people's farming in the area.
The study used methods of studying shoreline changes in the coastal area, methods
of assessing topographic changes in coastal areas, and methods of investigation - survey
to assess the current state of coastal erosion and estuary accretion in Quang Binh province,
the following results were obtained:
The situation of coastal erosion in the coastal strip of Quang Binh province is
occurring with an increasingly serious trend, increasing both in frequency, intensity and
scale of coastal erosion. This has caused great damage to property, affected production
and business, and left long-term consequences on socio-economic development and
ecological environment. The results of the study show that, from 1976 to 2019, the entire
coastline of Quang Binh province has about 32 sections of coastline that have been eroded
(Quang Trach 3 sections, Bo Trach 10 sections, Quang Ninh 6 sections, Le Thuy 5
sections, and Dong Hoi city 8 sections).
The phenomenon of estuary sedimentation in the study area is also taking place very
strongly, complicatedly and unpredictably, such as Gianh estuary, Dinh estuary, Nhat Le
estuary. It obstructs navigation and flood drainage, greatly affecting socio-economic
development here. In particular, the evolution of the coast and estuary in Nhat Le estuary
is very complicated: The results of analyzing remote sensing images using GIS show that
155
the total area of erosion on both sides of Nhat Le estuary over the period is over 20.8 ha,
with the length of the place with the strongest erosion up to more than 150.8 m in the
period from 1976 - 2019 has greatly affected the beaches on both sides of Nhat Le estuary.
Nhat Le estuary tends to fill up, creating bottlenecks at the river mouth, causing
difficulties for flood drainage and navigation.
1. Cu N.V. (2000). “Some comments on natural disasters (floods, coastal erosion, desertification) in the
central provinces and recommendations for solutions to overcome, prevent and mitigate natural
disasters”. Science Journal of Vietnam National University, Hanoi, 2000.
2. Cham D.D., Son N.H., Quan N.T. (2016). “Remote sensing - GIS application in coastal change
assessment in Cua Viet area, Quang Tri province”. Proceedings of the 2016 National GIS Application
Conference, 354 - 363.
3. Cham D.D., Son N.H., Son N.T. (2017). Remote sensing technology and geographic information
system to evaluate the alluvial plain occurrence in the coastal area of Ba Lat estuary in different times.
Science Journal - Hue University, 126 (7A): 15-24.
4. Cham Dao Dinh (2017). Research on the coastal development of Nhat Le river, Quang Binh province
for escape and traffic in the context of climate change. Vietnam academy of science and technology,
Geography Institute. Code: VAST06.03/15-16. Ha Noi, 12/2017.5.
5. Cham, D, D., Son, N, T., Minh, N, Q., Hung, N, T., and Thanh, N, T. (2020a). “Hydrodynamic
Condition Modeling along the North-Central Coast of Vietnam”. Engineering, Technology and
Applied Science Research, 10(3): 5648-5654.
6. Cham Dao Dinh, Nguyen Thai Son, Nguyen Quang Minh, Nguyen Thanh Hung, Nguyen Tien Thanh
(2020b). Hydrodynamic Condition Modeling along the North Central Coast of Vietnam. Engineering,
Technology and Applied Science Research, 10(3): 5648-5654.
7. Dan N.L., Cu N.V., and Cham D.D. (2007). Studying the current situation, determining the causes, and
proposing solutions to prevent and control the sedimentation of the river mouth to open the Nhat Le
channel, Quang Binh province. Final report on the topic at Vietnam Institute of Science and
Technology. Institute of Geography, Hanoi.
8. Ministry of Natural Resources and Environment (2016). Scenario of climate change, sea-level rise for
Vietnam, Publishing House of Natural Resources - Environment and Map of Vietnam, Vietnam.
9. Son, N, H., Cham, D, D., Hang, P, A., Quan, N, T., and Hoan, N, T. (2019). “Assessing the
Vulnerability of Agricultural Production Activities in the Coastal Area of Thua Thien Hue Province,
Vietnam by GIS Analysis Tools”. Journal of Geoscience and Environment Protection, 7(5): 116-130.
Mã số: 1K-04ĐH2022
In 200 bản, khổ 19x27 tại Công ty Cổ phần in và Thương mại Ngọc Hưng
Địa chỉ: Số 296 đường Phúc Diễn, tổ dân phố số 1, P. Xuân Phương, Q. Nam Từ Liêm, Hà Nội
Cơ sở sản xuất: Số 460 Trần Quý Cáp, Đống Đa, Hà Nội
Số xác nhận đăng ký xuất bản: 254-2022/CXBIPH/04-19/ĐHQGHN, ngày 21/01/2022.
Quyết định xuất bản số: 01 KH-TN/QĐ-NXB ĐHQGHN ngày 21/01/2022.
In xong và nộp lưu chiểu năm 2022.
Chịu trách nhiệm xuất bản: Giám đốc: TS. PHẠM THỊ TRÂM
Chịu trách nhiệm nội dung: Tổng Biên tập: TS. NGUYỄN THỊ HỒNG NGA
Biên tập: NGUYỄN THỊ THỦY
Chế bản: VÕ SINH VIÊN
Trình bày bìa: NGUYỄN NGỌC ANH
NHÀ XUẤT BẢN
ĐẠI HỌC QUỐC GIA HÀ NỘI
16 Hàng Chuối - Hai Bà Trưng - Hà Nội
Giám đốc – Tổng biên tập: (024)39715011
Hành chính: (024)39714899; Fax: (024)39724736
Quản lý xuất bản: (024) 39728806
Biên tập: (024) 39714896
INTERNATIONAL SYMPOSIUM HANOI GEOENGINEERING 2022:
INNOVATIVE GEOSCIENCES, CIRCULAR ECONOMY AND SUSTAINABILITY
9 7 8 6 0 4 3 5 2 4 7 0 3
ResearchGate has not been able to resolve any citations for this publication.
Article
Full-text available
Using Geography Information System (GIS) tools and remote sensing data in assessing the level of vulnerability of agricultural production activities in the coastal area has become more efficient in the recent years. This research has identified the sensitivity index (S) (including the traffic access index; the im-pact of residential areas; the impacts of industrial zones; the community de-pendence level), exposure index (E) (the sea level rises to 2100; the tempera-ture change to 2100), the adaptable capacity index (AC) (slope; morphology), thereby synthesizing the vulnerability index (V). Based on the indexes to cal-culate vulnerability, the high to very high vulnerability area is 37,081.44 ha, accounting for 68.09%; the average vulnerability level is 15,286.49 ha, ac-counting for 28.07%; the low to very low vulnerability level with an area is 2087.82 ha, accounting for 3.84% of the total area. With a high and very high vulnerability accounting for 68.09%, there will be great influences on the lives of resident in the area, especially agricultural production. https://www.researchgate.net/publication/339398757_Assessing_the_Vulnerability_of_Agricultural_Production_Activities_in_the_Coastal_Area_of_Thua_Thien_Hue_Province_Vietnam_by_GIS_Analysis_Tools [accessed Apr 10 2020].
Some comments on natural disasters (floods, coastal erosion, desertification) in the central provinces and recommendations for solutions to overcome, prevent and mitigate natural disasters
  • N V Cu
Cu N.V. (2000). "Some comments on natural disasters (floods, coastal erosion, desertification) in the central provinces and recommendations for solutions to overcome, prevent and mitigate natural disasters". Science Journal of Vietnam National University, Hanoi, 2000.
Remote sensing -GIS application in coastal change assessment in Cua Viet area
  • D D Cham
  • N H Son
  • N T Quan
Cham D.D., Son N.H., Quan N.T. (2016). "Remote sensing -GIS application in coastal change assessment in Cua Viet area, Quang Tri province". Proceedings of the 2016 National GIS Application Conference, 354 -363.
Remote sensing technology and geographic information system to evaluate the alluvial plain occurrence in the coastal area of Ba Lat estuary in different times
  • D D Cham
  • N H Son
  • N T Son
Cham D.D., Son N.H., Son N.T. (2017). "Remote sensing technology and geographic information system to evaluate the alluvial plain occurrence in the coastal area of Ba Lat estuary in different times". Science Journal -Hue University, 126 (7A): 15-24.
Research on the coastal development of Nhat Le river, Quang Binh province for escape and traffic in the context of climate change. Vietnam academy of science and technology, Geography Institute
  • Cham Dao Dinh
Cham Dao Dinh (2017). Research on the coastal development of Nhat Le river, Quang Binh province for escape and traffic in the context of climate change. Vietnam academy of science and technology, Geography Institute. Code: VAST06.03/15-16. Ha Noi, 12/2017.5.
Hydrodynamic Condition Modeling along the North Central Coast of Vietnam. Engineering
Cham Dao Dinh, Nguyen Thai Son, Nguyen Quang Minh, Nguyen Thanh Hung, Nguyen Tien Thanh (2020b). Hydrodynamic Condition Modeling along the North Central Coast of Vietnam. Engineering, Technology and Applied Science Research, 10(3): 5648-5654.
Studying the current situation, determining the causes, and proposing solutions to prevent and control the sedimentation of the river mouth to open the Nhat Le channel, Quang Binh province. Final report on the topic at Vietnam Institute of Science and Technology
  • N L Dan
  • N V Cu
  • D D Cham
Dan N.L., Cu N.V., and Cham D.D. (2007). Studying the current situation, determining the causes, and proposing solutions to prevent and control the sedimentation of the river mouth to open the Nhat Le channel, Quang Binh province. Final report on the topic at Vietnam Institute of Science and Technology. Institute of Geography, Hanoi.