Draining wetlands is the practice of removing water from marshes, swamps, or bogs to convert them into farmland or developable land. In AP Human Geography (Topic 5.10), it's a landscape-altering agricultural practice with consequences for biodiversity, water quality, and carbon storage.
Draining wetlands means pumping or channeling water out of naturally waterlogged ecosystems (marshes, swamps, bogs) so the land can be used for agriculture, housing, or urban development. Farmers and developers have done this for centuries because wetland soil is often extremely fertile once it's dry. The catch is that wetlands do a lot of free work. They filter water, absorb floodwater, store huge amounts of carbon in their soils, and host species that can't live anywhere else. Drain the wetland and all of that goes away.
In the AP Human Geography CED, draining wetlands appears in EK IMP-5.A.2 as one of the named agricultural practices that "alter the landscape," alongside slash and burn, terracing, irrigation, and deforestation. It's a textbook example of land cover change (EK IMP-5.A.1). The classic case is the Florida Everglades, where massive drainage projects converted wetlands into sugarcane fields and Miami-area suburbs, disrupting the entire regional hydrological system.
Draining wetlands lives in Unit 5: Agriculture and Rural Land-Use Patterns and Processes, specifically Topic 5.10: Consequences of Agricultural Practices. It directly supports learning objective AP Human Geography 5.10.A, which asks you to explain how agricultural practices have environmental and societal consequences. The CED names it explicitly in EK IMP-5.A.2, which means the exam can reference it by name and expect you to know what it is and what it causes. The bigger pattern it teaches is the core Unit 5 trade-off. Humans modify the environment to grow more food, and every modification has a cost. Draining wetlands trades ecosystem services (flood control, water filtration, carbon storage, habitat) for productive land. If you can articulate that trade-off, you've mastered the logic of the whole topic.
Keep studying AP Human Geography Unit 5
Habitat Loss (Unit 5)
Draining a wetland is one of the fastest ways to cause habitat loss. Wetland species like wading birds and amphibians need standing water to survive, so removing the water removes the habitat entirely, not just part of it.
Ecosystem Services (Unit 5)
Wetlands are nature's water treatment plants and flood sponges. When you drain one, those services don't just shrink, they disappear, and nearby communities often end up paying for flood control and water filtration that the wetland used to do for free.
Climate Change (Unit 5)
Wetland soils store massive amounts of carbon. Draining them exposes that carbon to air, where it oxidizes and releases CO2. So a local land-use decision in Unit 5 feeds directly into a global-scale environmental consequence.
Sustainable Agriculture (Unit 5)
Draining wetlands is essentially the opposite of sustainable agriculture. It maximizes short-term farmland gains at the cost of long-term environmental function, which is exactly the trade-off sustainability debates in Topic 5.12 are about.
Draining wetlands shows up most often in multiple-choice questions, usually in one of two ways. First, identification questions give you a real-world scenario (the Florida Everglades being converted for agriculture and urban development is the classic stem) and ask which agricultural practice it exemplifies. Second, consequence questions ask what results from draining wetlands, where correct answers involve habitat loss, reduced biodiversity, worse water quality, increased flooding, or released carbon. Watch for distractor answers that name other landscape-altering practices from EK IMP-5.A.2, like terracing or slash and burn. On FRQs, no released question has used the term verbatim, but it fits perfectly as a supporting example whenever a prompt asks you to explain environmental consequences of agricultural land use under 5.10.A. Naming a specific practice and a specific consequence is exactly what earns the point.
These are opposite water moves. Irrigation ADDS water to dry land so crops can grow there; draining wetlands REMOVES water from wet land so it can be farmed or built on. Both are landscape-altering practices in EK IMP-5.A.2, and both have signature consequences you should pair correctly. Irrigation leads to soil salinization and depleted water sources, while draining wetlands leads to habitat loss, flooding risk, and carbon release. MCQ distractors love to swap these.
Draining wetlands means removing water from marshes, swamps, or bogs to convert them into land for agriculture or urban development.
It is one of the agricultural practices named in EK IMP-5.A.2 that alter the landscape, alongside slash and burn, terracing, irrigation, and deforestation.
Major consequences include habitat loss and reduced biodiversity, degraded water quality, increased flood risk, and the release of stored carbon into the atmosphere.
The Florida Everglades is the go-to real-world example, where drainage converted wetlands into sugarcane fields and Miami suburbs and disrupted the regional water system.
Draining wetlands is the opposite of irrigation, since one removes water from wet land while the other adds water to dry land.
On the exam, pair the practice with its specific consequence, because vague answers like 'it hurts the environment' don't earn points.
It's the practice of removing water from wetland ecosystems like marshes and swamps to convert them into farmland or developable land. The CED lists it in EK IMP-5.A.2 (Topic 5.10) as an agricultural practice that alters the landscape.
Short term, yes, because drained wetland soils are often very fertile. Long term, it backfires: the land can subside, flood risk increases without the wetland sponge, and stored carbon is released, which is why it's a Topic 5.10 example of agriculture's environmental costs.
They're opposites. Irrigation adds water to dry land to make farming possible; draining wetlands removes water from wet land for the same goal. Irrigation's signature consequence is soil salinization, while draining wetlands causes habitat loss and carbon release.
Habitat loss and biodiversity decline, worse water quality since wetlands filter pollutants, higher flood risk since wetlands absorb floodwater, and CO2 release from carbon-rich wetland soils. Any of these can be the correct answer on a consequence-style MCQ.
The Florida Everglades. Drainage projects converted huge areas of wetland into sugarcane agriculture and urban development around Miami, disrupting the region's hydrological system. This exact scenario appears in practice questions for Topic 5.10.