What are the guidelines for analysis of the impact of tides on the nature and economy of coastal countries? When must students in vocational education and training institutions at the upper secondary level in Vietnam undergo re-assessment?
What are the guidelines for analysis of the impact of tides on the nature and economy of coastal countries?
The phenomenon of tides not only has a significant impact on marine ecosystems and the natural environment but also plays an important role in the economic development of coastal nations.
Below is a suggested analysis of the impact of tides on the nature and economy of coastal countries:
| 1. Impact of Tides on Nature - Formation and transformation of coastal topography: + Tides contribute to the creation of distinct landforms such as tidal flats, river mouths, gulfs, and coral reefs. + The continuous rise and fall of tides deposit sediment, expanding coastal land, particularly in delta regions (for example: Mekong River Delta, Red River Delta). - Changes to coastal ecosystems: + Tidal areas are where characteristic mangrove ecosystems develop with plant species such as mangroves and a diverse animal system including shrimp, crabs, fish, and mollusks. + Coastal river mouths affected by tides are breeding, nurturing, and development areas for many important marine species. - Regulation of water environment: + Tides aid in water circulation in lagoons, bays, and estuaries, reducing pollution, improving water quality, and maintaining ecological balance. 2. Impact of Tides on Economy - Agriculture and aquaculture: + Tides provide the necessary salt and brackish water for aquaculture of species like shrimp, crabs, fish, and mollusks. + Tidal flats are also used for farming clams, oysters, and other mollusks, offering significant economic value. - Fishing: + Tides create conditions favorable for coastal fishing thanks to the movement of fish and shrimp along tidal currents. - Maritime transportation: + Tides affect water levels at seaports, making it easier for ships to enter and exit by utilizing rising tides. This is especially important for seaports located at river mouths. + In large river areas, tides also facilitate boats and ships in navigating upstream or going out to sea. - Energy exploitation: + Tides are used for harnessing clean energy through tidal power plants. Areas with large tidal ranges, such as the Bay of Fundy (Canada) or the English Channel, are ideal locations for tidal energy development. - Coastal tourism: + Tidal flats and the rise and fall of tides create unique landscapes that attract tourists, especially for activities like exploring tidal flats, coral viewing, and water sports. 3. Challenges Posed by Tides - Risk of flooding and coastal erosion: + High tides combined with large ocean waves can flood coastal areas, particularly in the context of rising sea levels due to climate change. + Tidal activities also erode coastal land, causing land loss and affecting infrastructures. - Spread of pollution: + Tides can spread pollutants from industrial or urban coastal areas into the marine environment, harming ecosystems and fishery resources. - Impact on production and daily life: + In areas with large tidal ranges, agricultural production or daily life may be disrupted due to salinity intrusion or the scarcity of freshwater during low tides. Conclusion Tides play an important role in the natural environment and economies of coastal nations, contributing to the formation and protection of ecosystems, facilitating agriculture, aquaculture, fishing, energy exploitation, and tourism development. However, they also pose challenges in environmental protection and climate change adaptation. Therefore, coastal countries need to develop rational management and exploitation solutions to maximize benefits and minimize risks posed by tides. |
Note: The content is for reference only.
What are the guidelines for analysis of the impact of tides on the nature and economy of coastal countries? When must students in vocational education and training institutions at the upper secondary level in Vietnam undergo re-assessment? (Image from the Internet)
When must students in vocational education and training institutions at the upper secondary level in Vietnam undergo re-assessment?
Under Clause 8, Article 10 of Circular 15/2022/TT-BGDDT, students in vocational education and training institutions at the upper secondary level in Vietnam must undergo re-assessment in the following cases:
- In case a GPA of a subject of a student is under 5,0 points, he/she may retake his/her exam to be re-assessed.
- The assessment point of a subject can replace the GPA of such a subject.
How is the GPA of a subject of students in vocational education and training institutions at the upper secondary level in Vietnam calculated?
According to Clause 6, Article 10 of Circular 15/2022/TT-BGDDT, the GPA of a subject of students in vocational education and training institutions at the upper secondary level in Vietnam is calculated using the following formula:
|
GPA = |
TDDGtx + 2 xTDDGDk |
|
DDGtx + 6 |
Where:
The grade point average of the subject (GPA) is the average obtained by dividing the total number of the regular and periodical assessment points and rounded to 01 (one) decimal place:
TDDGtx: total regular assessment points
TDDGtx: total periodic assessment points
