We draw the line before the rain.
Flood lines, wadi crossings and catchment models for Oman and the Gulf. We tell you how high the water will come, in centimetres, before anything is built.
This wadi is running at +0.10 m. Raise it and watch what each depth does, up to this plot's line.
What each depth does
- +0.15 mYou couldn't stand in it. Moving water this deep knocks an adult down.
- +0.30 mThe saloon floated off.
- +0.60 mThe four-wheel drive went too.
- +0.70 mThe road out is under water.
- +1.50 mThis plot's line. A 1-in-100-year flood stops here. We'd set the floor 30 cm above it, at +1.80 m.
From the ridge to the sea.
Rain that falls on the Hajar reaches town through the wadis, sometimes as a single wall of water. We work along the whole way down, so the line we give you counts everything above your site.
- In the mountains
Catchment models
How much rain falls above you and how fast it arrives. We model the whole catchment, ridge to plot, for the storms that matter.
- Where the road dips
Wadi crossings
Culverts sized for the common flood, causeways set above the rare one, depth posts where a driver at night will read them.
- On the bank
Flood line studies
The height a 1-in-100-year flood will reach on your plot, in centimetres, signed by a chartered engineer.
- Through town
Channels and defences
Where the water has to pass through town: channels, bunds and check dams, sized to the line and drawn to be built.
One number, in centimetres.
A flood line study answers the question that matters before you build near a wadi: how high will the water come, here? You get a level, the floor to set above it, and the drawings that prove it.
+1.20m
- You send
- The plot's location and its survey, and a sketch of what you want to build if you have one.
- We model
- The catchment above it, the 1-in-100-year storm, and the path the water takes past your plot.
- You get
- The line sheet: your level, the floor we'd set, and what to build, signed by a chartered engineer.
A crossing should tell the truth.
Most of the year a wadi crossing is just a dip in the road. We design it for the day it isn't.
- Box culverts sized for the 1-in-10-year flow, so the road stays open in an ordinary flood.
- A level above which the road closes, set before it becomes a trap, and signed on the approach.
- Depth posts at the start of the dip, facing the traffic, where headlights reach them.
The name is a gauge.
One number. In centimetres. Before anyone builds.
مقياس, miqyas, means gauge. Cairo's Nilometer, the stone column that has measured the Nile's flood since 861, is called al-Miqyas. We took the name because it's the job: measure the water, and say so before it comes.
We're hydrologists and civil engineers in Muscat. We walk the wadis we model, survey the crossings we design, and go back to the plots after the water has gone down, to read the marks it left and check our lines against them.
Find your plot's line.
Tell us where it is and what you plan to build. An engineer replies, usually within two working days, with what we'd need and what it would cost.