Human impacts: hard/soft engineering, land reclamation, pollution：練習問題

Which of the following describes the primary function of gabions when used as a hard engineering strategy for coastal or river management?

Large-scale land reclamation projects are common in cities like Hong Kong to provide land for urban development. However, these projects often lead to significant environmental consequences. Which of the following is a direct impact of land reclamation on the marine environment?

Pollution from industrial discharge containing heavy metals enters a river system and eventually flows into the sea. Which of the following best describes the ecological risk of this type of pollution in the marine environment, particularly focusing on its long-term impact on the food chain?

In the context of coastal management, which of the following best describes the primary disadvantage of hard engineering strategies compared to soft engineering approaches?

Land reclamation is a common practice in many coastal cities, including Hong Kong, to create new land for development. What is a direct and immediate environmental impact of large-scale land reclamation on the local coastal ecosystem?

Which of the following describes a hard engineering strategy for managing a river environment to reduce flooding?

Coastal management strategies are essential for protecting coastal areas from erosion and flooding. These strategies are broadly classified into hard engineering and soft engineering.

(a) Define 'hard engineering' and provide one specific example of such a strategy used to protect the coast. (2 points)

(b) Explain one reason why 'soft engineering' is often considered more sustainable or environmentally friendly than hard engineering in the long run. (2 points)

Coastal development through land reclamation is a common response to land shortages in rapidly growing cities. While providing space for infrastructure, it significantly alters the natural environment and necessitates various coastal management approaches.

(a) Explain three distinct ways in which the process of land reclamation can lead to water pollution and the loss of biodiversity in marine ecosystems. (3 points)

(b) To protect reclaimed land from erosion, planners often implement management strategies. Compare the use of breakwaters (hard engineering) and beach nourishment (soft engineering) in terms of their cost-effectiveness and their secondary impacts on nearby coastlines. (3 points)

(c) Identify one reason why soft engineering is often considered more sustainable than hard engineering in the context of coastal management. (1 point)