Wetland fieldwork goes wrong in small, ordinary ways far more often than dramatic ones. A foot goes through a mat of vegetation that looked solid. A tide comes in faster than the creek suggested. A phone loses signal two fields before the access gate. None of these are catastrophes on their own — but stacked together, on a cold afternoon, with a team strung out across a bog, they become one.

A pre-fieldwork routine is not bureaucracy. It is what lets you spend your day thinking about the data rather than about whether you can get out of the site before dark. What follows is the version worth running through the day before you go.

Begin at the desk, not the boardwalk

A risk assessment copied from another project is worse than no assessment at all, because it gives false comfort. Write it for this site, this season and this team. Think through the whole day in order: travel, access, the work itself, egress, and the return journey. Note the things that change — a footpath closed by flooding, a gate that is padlocked in winter, a river crossing that is only safe after a dry spell.

Questions to settle before you pack

• Who leads the day, and who takes over if that person is the one who is injured?
• Who outside the team knows the plan, the route and the expected return time?
• Where is the nearest point with reliable mobile signal, and where is the nearest hospital with an emergency department?
• What permissions or landowner contacts do you need, and who is carrying them on the day?
• What would make you call the work off — rising wind, a rising tide, thunder, a colleague who is not right?

That last question matters most. Deciding your abandonment triggers in advance means you do not have to negotiate them in bad weather with wet hands.

Safety kit that earns its place

Wetland sites are awkward because the ground is often the hazard and the work site is often the escape route. Kit should reflect that.

• A wading or thumb staff. Probe every step in unfamiliar ground. It is the single most useful item you can carry.
• A throw line kept where you can reach it, not at the bottom of a rucksack.
• A buoyancy aid if you will be near deep water, in a boat, or on soft ground where a step could put you in over your knees.
• A group first aid kit with a tick removal tool, blister kit and enough dressings for a serious bleed.
• Spare warm layers and a hat in a dry bag — a dry fleece changes a bad afternoon into a manageable one.
• Head torch and spare batteries. Days end earlier than plans do.
• Offline maps, a compass and a paper copy of the plan. Batteries fail; paper does not.
• Water for washing, hand sanitiser, sun protection and a midge net. Unglamorous, genuinely used.

Waders, water and cold

Chest waders are a tool for shallow, known-depth water. They are not a licence to go deeper, and if you fall in they can fill and drag. Wear a belt, keep the straps done up and stay within wading depth you have already probed. Above that, switch to a dry suit or a boat.

Cold water is the part people underestimate. A slip into a peat pool in November is not just uncomfortable; it drains heat fast and reduces your ability to help yourself. Get the person out, get wet layers off, get them into dry clothing, shelter and warmth, and watch them. If someone has been immersed and is shivering uncontrollably, confused, drowsy or slurring, treat it as a medical emergency and call for help. If you are unsure about any health concern after fieldwork, speak to a GP, NHS 111 or your occupational health service rather than working it out on the drive home.

Lone working and communications

Check signal at the site before you rely on it, not on the day you need it. In many lowland marshes the signal vanishes in the middle of the field even when it is strong at the car park. Take a phone in a waterproof pouch, a power bank, and a personal locator beacon or satellite messenger if you are working well beyond coverage.

Set a check-in schedule — a message at the start of work, at a mid-point and on leaving — and give it to two people who will actually act if you miss one. On tidal marshes, add the tide window to that message. For coastal sites, a handheld VHF radio is worth more than a mobile phone, and it reaches the coastguard directly.

Emergency protocols you should already have rehearsed

Seconds matter, and nobody performs well under pressure without having thought it through first. Talk this through as a team, out loud, before you leave the vehicles.

1. Stop and assess. The instinct to rush towards a casualty is the instinct that creates a second one.
2. Call for help early. In the UK, 999 or 112. Give a grid reference or what3words location, what has happened, how many casualties, and your access route.
3. Keep the casualty warm, sheltered and visible, and stay with them.
4. For soft-ground entrapment, do not pull. Pulling can injure. Offload weight, spread your own, keep the airway clear, and wait for the fire and rescue service — mud and peat rescue is specialist work.
5. Note the times and the decisions. A short written record immediately afterwards helps everyone, including you.

Reading bog and saltmarsh ground

Peat is the trickiest surface in British wetland science. Sphagnum lawns can hide pools. Hags and gullies hide behind heather and cottongrass. Floating mats of vegetation can carry a person one day and not the next. Saltmarsh has its own version: creeks that cut deep under grass, and soft mud that is firm at the edge and bottomless ten metres out.

Two habits cover most of it. Probe before every step in ground you have not already walked, and move as a group rather than a scatter — close enough to see each other, far enough apart that one person's mistake does not take two people down.

If you would not put your weight on it with a pole testing it first, do not put your weight on it at all.

The night-before routine

Pack in the evening, not the morning. Charge everything. Check the forecast and the tide table together and decide whether the plan still holds. Brief the team on the route, the turnaround time and the abandonment triggers. Send the plan to your two contacts. Then put the bag by the door and stop thinking about it.

On the day, treat the plan as something you keep testing rather than something you follow. If the ground is wetter than expected, if the wind rises, if someone is tired or quiet, change the plan. No dataset is worth a rescue call, and the best wetland fieldwork has a quiet, unremarkable safety record behind it.

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