Building a Water Resources Database at a Scale of 1:100,000

- Documents for writing reports: web reports on natural and socio-economic characteristics of provinces on the Da River mainstream; information on large hydroelectric projects; soil and water quality on the Da River mainstream; customs and practices of people living around the Da River; reports and research topics on water security on the Da River;

+ Circular No. 16/2009 – TT/BTNMT on “Regulations on National Technical Regulations on Environment” in 2009 issued by the General Department of Environment, Ministry of Natural Resources and Environment;

+ Circular 07/2009/TT-BTNMT dated July 10, 2009 on "Detailing a number of articles of Decree No. 102/2008/ND-CP dated September 15, 2008 of the Government on collection, management, exploitation and use of data on Natural Resources and Environment";

3.3. Building a water resources database at a scale of 1:100,000

Maybe you are interested!

The above documents are processed to build a database including information layers of Water Security, Exploitation Status, Water Resources Planning, Water Resources; stored in Geodatabase with the structure arranged according to Figure 3.1.

Figure 3.1: Structure of water resources database

The water resources database product in ArcGIS is shown:

Da.

Figure 3.2: Water resources database (ArcGIS)

3.4. Comments on the assessment of water security level in the river basin

Based on the Da River water security data built in the database

Our country's resource data shows:

- The level of impact on water resources in densely populated cities, near industrial parks and economic zones in provinces with large hydropower projects such as Lai Chau, Dien Bien, Son La and Hoa Binh is in an alarming state, with serious impacts on the main stream of the Da River.

- In the research areas of the provinces on the main stream of the Da River, Hoa Binh province is assessed to have the weakest security level. The level of water security is shown by level (severely affected area (level 1), heavily affected area (level 2), less affected area (level 3). Based on the displayed presentation file, in Hoa Binh province, it is mainly level 1 and 2, which means that the serious impact level is in an alarming state, only a small part of the water source area is slightly affected. Thus, Hoa Binh province needs to take measures

Specific measures to use water resources economically and effectively. Provide clear directions for using water resources for hydropower and agricultural development purposes, avoiding waste. Enhance the responsibility of individuals and units and propagate to people to perform well the assigned tasks to contribute to ensuring water security for the region in particular and for the Da River mainstream in general.

- Of the three remaining provinces, Son La is the province with the safest water source, with the least impact level, so it is necessary to maintain a stable level of water source, contributing to the accumulation of water source for use in the main stream of the Da River, and release water at the right time to supply the water shortage for the tributaries on the main stream of the river. In terms of seriousness, Dien Bien and Lai Chau provinces will need to pay more attention to the issue of water source security, because there is a large economic zone here with a large concentration of trade exchanges, in the future the level of water source security will increase significantly, so this province must have policies and strategies for reasonable use of water sources right now.

- Notably, the source of incoming water in Lai Chau province is not assessed, with a fairly large area located upstream on the main stream of the Da River. With a fairly dense river system, providing abundant water from upstream, however, in these places it is impossible to assess the source of incoming water, this will be one of the issues that needs to be carefully researched and developed in future studies.

- Water security based on agricultural development criteria: with the vegetation on the main stream of the Da River quite rich, stretching along the 6 provinces in the research area with a large annual food supply output. Therefore, the issue of water supply for agricultural development needs to be focused on more, especially farming practices, it is necessary to eliminate backward farming practices, improve science and technology, to minimize quality.

water resources as well as deploying more reasonable irrigation systems while still ensuring water security on the main stream of the Da River.

- Water security based on hydropower development criteria: with abundant water resources, the Da River mainstream is a basin with great potential for developing the electricity industry. Currently, large hydropower projects are located on the Da River mainstream; however, based on the level of water security analyzed above, the development of this energy source must ensure maximum limitation of water pollution and have specific measures, especially the construction of a system of interconnected reservoirs to maximize the supply of water shortages during the rainy season.

4. Conclusion

Water security is becoming one of the major challenges for the future. In addition to objective factors such as climate change and environmental degradation, the negative impacts of sustainable development policies and lack of visionary planning are among the main causes leading to this challenge.

Through ArcGIS 10.2.2 software, the project has built a water resources database on the main stream of the Da River, ensuring the provision of managers, statistics and forecasts of water security with a map scale of 1:100,000. This is the first step in forming a basic water resources database, thereby contributing to the effective use of water resources, ensuring sustainable development. Analysis of the results achieved in the study shows that water flow and impact level play a very important role in assessing the level of water security. Areas with seriously affected water sources are mainly concentrated in densely populated areas, where there are large industrial and economic clusters or dense vegetation. Meanwhile, the area of areas with less impact is mainly concentrated in sparsely populated areas.

where the economy is not yet developed much.

From the established water resources database, we can assess the level of water security in each province in the research area according to the criteria of hydropower and agricultural development. We can comment on the relationship between population concentration, development level in industrial zones, economic zones and water security level; the restoration and regeneration of water resources play an extremely important role. The results obtained in the study are an important source of information to help managers make forecasts and measures to minimize damage caused by human activities to water resources.

5. Recommendations

The data used to build the water resources database on the main stream of the Da River is not much, especially data on water resources; the existing data is only printed and cannot be used directly, so it takes a lot of time to edit, digitize and bring the map to the correct scale according to the research topic. This also greatly affects the time to complete the topic, so it is only possible to build a database with a moderate level of detail, the next research direction is to ensure the level of detail in the management, statistics and forecasting of water security. It is proposed to build a water security database at a scale of 1:25,000.

Keywords: Water resources database, water security, Da River.

SUMMARY OF DISSERTATION

Student's fullname: Tran Thi Thom. Class: CH1TĐ Course: 1. Main instructor: Dr. Dinh Xuan Vinh.

Assoc. Prof. Tran Duy Kieu.

Topic: Establishment of a database on water resources at the rate of 1:100,000 to ensure the security of water sources on the main river of Da river.

Summary:

1. Introduction

In the 21st century, water is ranked second only to human resources. At present, ensuring the security of water resources is considered the most important and urgent problem in all contents about the water. River water sources in many places are in danger of deterioration, depletion, sedimentation and salinity intrusion leading to the water supply for various human purposes becoming increasingly difficult and complicated. Therefore, the security of water resources is expressed through the specific criteria such as sustainable development, hydropower development, agricultural development ... are the typical criteria to help forecast that water is used by a reasonable way. Responding to these urgent needs requires a water resource database for management, assessment and forecasting of this particularly important resource. Therefore, the test of building a water resources database on the mainstream of the Da River with the title "Building a water resources database at the rate of 1: 100,000 to ensure water security on the main river of Da river" is a study in the right direction and is the basis for forecasting water security on the mainstream of Da river on development criteria for resources hydropower in particular and is a base to contribute to the assessment of water

in the basin in general.

Objectives is: To build a database on water resources in the Da River mainstream according to the current technical standards of the Ministry of Natural Resources and Environment with a view to build a database on water resources by information technology, specifically, the application of ArcGIS 10.2 .2 software package to design the database for the management of water resources on the Da River mainstream is the best tool for managing and adjusting the forecasting issues related to water security.

2. Main contents

2.1. Overview of research situation

To obtain the objective and content of the thesis, the research method used in this thesis consists of the following methods:

- Methods of data collection and synthesis include:

+ Gathering existing documents, professional documents, relevant scientific topics have been published, updated the new information on the network, inherit the achievements related to the content of the thesis. .

+ Analyze the source of the collected data and then select appropriate research methods.

- Methods of technology evaluation and exploitation include:

+ Evaluate and compare research methods with other common methods.

+ Improve the accuracy of the database.

- Methods of database development:

Establish and manage information on the status of water resources. From this, we analyze the current situation and propose solutions for the rational and scientific use of this resource.

- GIS application methods include:

+ The information layers are extracted from the map at the ratio of

1: 100,000 to be digital introduced and standardized into the database.

+ Use GIS tools to superimpose layers of information, check the accuracy between the information.

2.2. Process of building a database on water resources

Water resources database at the rate of 1: 100,000 to ensure the security of water sources on the mainstream of Da river is built in accordance with the national technical standards on basic geographic information standards, Data and generalize process according to the following diagram:

Learn about the research area and determine the purpose of the database

Collect documents, maps and necessary information in the database

Convert data formats and edit spatial data

Enter attribute information

Water Resources Database

Build attribute data

Classification and standardization of objects geographically according to the directory tree design