The phrase "a gradient of about" is correct and usable in written English.
It can be used when discussing measurements or changes in a particular variable, often in scientific or technical contexts.
Example: "The temperature showed a gradient of about 5 degrees Celsius per hour as the sun set."
Alternatives: "a change of approximately" or "a slope of roughly".
It is the extension of the Himalayan piedmont plain that slopes southward from a height of 96 33 m with a gradient of about 55 cm/km.
In this context, we note the rapid increase in SNR between 82 and 84 km, which corresponds to a gradient of about 8 dB/km.
In the presence of a gradient of about 2 T/m, slices of 2 mm could be profiled with a resolution that ranges from 25 μm at the center of the slice to 50 μm at the borders.
The panel members were satisfied that, after take-off, VH-AET achieved a normal climb of about 325 feet per minute (1.6 m/s) and a gradient of about 1¾% before suddenly commencing a descent of about 17½%.
In addition, the floors of stalls followed the slope of the hill, a gradient of about 1 12, causing health problems for those market workers who had to stand at this angle for prolonged periods during the day.
Origin firing is followed by bidirectional fork progression, resulting in a gradient of about 100-kb of amplified DNA (Claycomb and Orr-Weaver 2005).
As well as all that there is also two whopping climbs with an average gradient of about 6% for the riders to tackle and the fact that there are some tricky descents on the other side that may well be punctuated with heavy rain.
An onset temperature gradient of about 4.5 K/mm was achieved, and the peak-to-peak acoustic pressure was 48 KPa at the 2 MPa mean pressure when 200 W heating power was the input.
Walking through the building is like viewing a timelapse; a gradient of construction.
There is a gradient of anonymity in the online world, and review-writing is no exception.
Their bodies, according to the 28-year-old artist, are washed in "a gradient of grays".
