IB Geography HL — Water management futures

Key Idea: Topic 7.4 is about how the water in a drainage basin is managed for the future, and why that always means choosing between competing users. It pulls together two ideas: 7.4.1 — integrated management & dams: a dam is the most powerful tool a manager has — it stores water for power, supply and flood control — but it creates winners and losers by stakeholder. Integrated drainage basin management (IDBM) answers that by planning the whole basin as one system, coordinating every user and riparian country. 7.4.2 — stakeholders, conflict & wetlands: the same water is wanted by farmers, cities, industry, fishers, governments and conservationists, so management creates conflict from competing demands and unequal power. Wetlands give free ecosystem services but are easily drained — the basin's future depends on balancing all the stakeholders sustainably. This is Option A (Freshwater) content, examined on Paper 1. Each option carries map/figure reads and a short structured Explain, then a [10] extended-answer (Examine / Evaluate / Discuss). SL answers 2 options, HL answers 3 — the same questions at both levels.

🏞️ 7.4.1 — Integrated management & dams

A drainage basin rarely sits inside one town or one country, so its water must be shared. A dam stores water in a reservoir and lets the operator control downstream flow — bringing power, irrigation and flood control, but flooding land upstream and starving downstream users of water and silt. Integrated drainage basin management (IDBM) manages the whole basin as one system, coordinating all users and riparian countries for fair, sustainable water use instead of acting scheme by scheme. The skill examiners test is reading a thematic map (dams along a river, or managed aquifer recharge sites by region), then Identify or Outline an upstream-to-downstream impact and pin it to a stakeholder.

Tip: For Outline and Explain marks, never stop at the effect: upstream dam → traps silt → downstream soils lose fertility → farmers' yields fall. Say who is affected and why. On the IDBM Explain, give two developed advantages of the whole-basin plan — listing one dam's benefits is capped.

🤝 7.4.2 — Stakeholders, conflict & wetland futures

A stakeholder is any party with an interest in how water is managed. Different stakeholders want different things from the same river, lake, aquifer or wetland — so management creates conflict from competing demands (drinking, farming, energy, fishing, nature) and unequal power (a government or big firm can override a small village or a wetland). Wetlands (marsh, swamp, floodplain, delta) sit at the centre of the conflict: they give free ecosystem services — flood control, water cleaning, carbon storage, wildlife — yet are easily drained for land. A sustainable future needs the stakeholders balanced, which is exactly what the [10] essay asks you to weigh.

Example: Three Gorges (Yangtze, China) — huge power and flood control, but about 1.3 million people relocated: a dam whose costs and benefits fall unevenly. Grand Ethiopian Renaissance Dam (Nile) — Ethiopia dams the Blue Nile upstream while Egypt fears losing its supply: a transboundary clash. The Aral Sea (Central Asia) — rivers diverted for cotton until the inland sea shrank, wrecking fishing: over-abstraction by one sector. The Sudd (White Nile, South Sudan) — a vast wetland where draining it for downstream farming pitted herders and conservationists against downstream states.

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