After intense rain, a neighbourhood in Jakarta was surveyed by a disaster-risk team. Fig. 1 shows houses built beside a canal, a raised road and a drain blo...
Question 1 Report
After intense rain, a neighbourhood in Jakarta was surveyed by a disaster-risk team. Fig. 1 shows houses built beside a canal, a raised road and a drain blocked by plastic waste. The city has expanded rapidly onto low-lying land. Some families have few housing choices, while others value the site because it is close to employment. The team needs to distinguish between physical causes of flooding and human actions that increase the risk before proposing a response.
(a) Identify the water channel shown in Fig. 1. [1]
(b) Identify two human actions visible in Fig. 1 that could increase flood risk. [2]
(c) Identify three strategies the city could use to reduce flood damage in this neighbourhood. [3]
Answer Details
(a) The water channel is a canal or drainage channel. [1]
(b) Human actions increasing flood risk include building homes close to or on flood-prone land and dumping waste that blocks drains. Extensive hard surfaces reducing infiltration are also valid. [2]
(c) The city could clear and maintain drains, improve waste collection, and create retention ponds or wetlands to store water. Raising defences, restricting building on high-risk land, and providing warnings and evacuation plans are further valid strategies. Any three gain credit. [3]
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