I attempted to search for the answer, but any relevant information was undiscoverable amongst political slogans.

On a very basic level, how can a low-lying swamp be drained? Some swamps can be drained by creating a steep-slope artificial river, e.g. the Old Bedford River, but that wouldn't work in a consistently low-lying environment. I grew up on the edge of the former Great Black Swamp, which was converted into productive farmland, but it's extremely low-lying — local rivers flow toward Lake Erie, but in 120km they fall just 100m — so this wouldn't have worked well. As well, drainage was accomplished in the 19th century by local residents, so internal-combustion-powered machinery and huge steam-powered machinery seemingly would have been out of the question. Nyttend (talk) 20:46, 6 March 2025 (UTC)[reply]

The Dutch use windmills. Abductive (reasoning) 21:05, 6 March 2025 (UTC)[reply]

They build a dike around the area and dig a canal (Dutch: ringvaart) surrounding the dike. The canal functions as a reservoir, higher than the drained area, into which water is pumped.  ​‑‑Lambiam 21:22, 6 March 2025 (UTC)[reply]

Our article mentions the (steam-powered) Buckeye Traction Ditcher as expediting the draining of swampy areas.  ​‑‑Lambiam 21:13, 6 March 2025 (UTC)[reply]

Really, this can be done very low tech. You can use tile drainage, or just run known irrigation methods backwards, such as a Screw of Archimedes or other pump, human or donkey-powered. Abductive (reasoning) 21:31, 6 March 2025 (UTC)[reply]

Ah, I misunderstood what this machine was; I overlooked the record-pace tile laying and figured it was just something to dig ditches, and envisioned them as being only an ancillary aspect of the process. Nyttend (talk) 02:37, 7 March 2025 (UTC)[reply]

The Brits drained The Fens centuries ago, likewise using windmills. ←Baseball Bugs ^{What's up, Doc?} carrots→ 22:48, 6 March 2025 (UTC)[reply]

To this Dutchman 100 metres in 120 kilometres doesn't sound like extremely flat. We have a drop of about 8 metres in 120 kilometres, but it's only in the lower part of the country that pumps are required. They used to be wind powered (starting around 1500), but apart from some small wind pumps for local use, those are now mostly seen as industrial heritage or tourist magnets. There was a switch to steam in the late 19th century (one still in use, some others preserved as industrial heritage), then to a mix of diesel (a few pre-1930 diesels are still operational, but most are from the 60s and 70s) and electric pumps. The power for the electric pumps comes partially from wind turbines, so we're back at wind power.

But you can even drain a swamp without any pumps, making use of the tides. Build some drainage cuts and a dike with a check valve and you can lower ground water level from close to high tide to close to low tide, easily a 2 metre drop. It was already common in the 13th century. PiusImpavidus (talk) 10:26, 7 March 2025 (UTC)[reply]

TBF, the swamp under discussion is near Lake Erie (whose tides are negligible), not any ocean shore. The fact about the tides is pretty cool regardless, though. -- Avocado (talk) Avocado (talk) 13:11, 7 March 2025 (UTC)[reply]