Wiktionary
n. (context agriculture English) Surface or subsurface water that leaves the field following application of irrigation water.
Wikipedia
Return flow is surface and subsurface water that leaves the field following application of irrigation water. While irrigation return flows is a point source, they are expressly exempted from permit requirements under the Clean Water Act (P.L. 92-500, as amended).
Return flows generally return to the irrigation centre after a period of about three to four weeks; due to this, the farmers usually need to pour bleach into the water to clean it of any organisms that have entered the stream. If this is not taken care of, diseases such as typhoid or cholera could enter the irrigation and pose a risk of epidemic disease to surrounded towns and cities.
Usage examples of "return flow".
But there's no return flow, Wolf has nothing Kendric needs to know.
Ahead and to the right, the line was coming into view of the new roadway with its procession of robot trucks carrying produce from the extraction operations north to the Amazon outlet, and a return flow of vehicles either empty or bringing construction materials and supplies.
The arteries are wide open, but just before the capillaries the return flow is cut off and the veins collapse.
Their calculations had erred as to the length of the time loop by twenty-two years, and he could not guess how that would affect the length of the power surge, but the return flow must surely have begun.
Then the return flow, cool sweet air, pistoned Hell back into its proper region and washed Suilin in its freedom as well.
In better days, it had seen regular caravans carrying the raw products of the Boman, leather and drugs mainly, to the south, and the return flow of manufactured products—.
The result of that return flow of energy was like a dagger thrust.
In better days, it had seen regular caravans carrying the raw products of the Boman, leather and drugs mainly, to the south, and the return flow of manufactured productsjewelry and the very weapons the cavalry now faced.
In better days, it had seen regular caravans carrying the raw products of the Boman, leather and drugs mainly, to the south, and the return flow of manufactured products-jewelry and the very weapons the cavalry now faced.
During this return flow, the lymph trickled through lymph nodes, which interrupted the flow and filtered out the solid particles of body waste, thus preventing them from entering the blood system.
I saw my blood flow through the tube in my arm into the machine, and the return flow to my vein.
But the process was 2interactive, and the act of reading his mind generated a lesser return flow, so that he perceived, as in a dream, the memories of the Oracle.