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This is one of the first films depicting a Keyline Flood Flow system consultancy by P A Yeomans, on near flat land adjacent to a swampy river valley.

River water flows into a gently falling diversion channel all the way into a shallow creek valley.

So that this water can irrigate the greatest area of land, a flat channel takes the shortest path (making the water available higher in the landscape) across the shallow creek valley on a viaduct wall, creating a lake behind it.

River water is diverted into the lake or across the wall to a falling irrigation channel.

In lieu of an overflow channel from the lake, flooded water-gates at the end of the long arm of the storage (parallel to & uphill from the irrigation channel) release water back down the plain into the now lower irrigation channel.

For additional Keyline Flood Flow irrigation higher in the landscape, Yeomans installs a low lift/high capacity pump along the same long arm of the lake.

To maximise this higher irrigation area, the pumped water is sent into an upper contour irrigation channel.
Source:
By Geoff Booth:
Film Descriptor for ‘P A Yeomans-Keyline in New Caledonia (20 min) 1965’

References:
Further details of this specific New Caledonia consultancy can be found in these books in two formats; the latter ones being an additional compilation with P A Yeomans' first book (each out of print):
(i). Yeomans, P.A. (1965, 1968). Water For Every Farm. Sydney, NSW: The K.G. Murray Publishing Company Pty Ltd., and
(ii). Yeomans, P.A. (1978). Water For Every Farm Using The Keyline Plan. Sydney, NSW: Murray Book Distributors Pty Ltd., or
(iii). Yeomans, P.A. (1981). Water For Every Farm Using The Keyline Plan. Katoomba, NSW: Second Back Row Press Pty Ltd.
(see particularly the flight photo Plate 23 in each book)

See also:
The detailed Film Descriptive Paper by Geoff Booth; including additional rare project script photos & his calculations:
Film Descriptive Paper and Calculations for ‘P A Yeomans-Keyline in New Caledonia (20 min) 1965’
[ Ссылка ]_

Books:
P A Yeomans wrote the following four books in five formats (each out of print):
1. Yeomans, P.A. (1954). The Keyline Plan. Sydney, NSW: P.A. Yeomans
[ Ссылка ]
2. Yeomans, P.A. (1958). The Challenge of Landscape. Sydney, NSW: Keyline Publishing Pty Ltd.
[ Ссылка ]
3. Yeomans, P.A. (1965, 1968). Water For Every Farm. Sydney, NSW: The K.G. Murray Publishing Company Pty Ltd.
4. Yeomans, P.A. (1971). The City Forest. Sydney, NSW: Keyline Publishing Pty Ltd.
[ Ссылка ]
5. Yeomans, P.A. (1978). Water For Every Farm Using The Keyline Plan. Sydney, NSW: Murray Book Distributors Pty Ltd.
or Yeomans, P.A. (1981). Water For Every Farm Using The Keyline Plan. Katoomba, NSW: Second Back Row Press Pty Ltd.

Additionally, P A Yeomans' academic colleague wrote (out of print):
6. Holmes, J.M. (1960). The Geographical Basis of Keyline. Sydney, NSW: Angus & Robertson Pty Ltd.
[ Ссылка ]

Note:
P A Yeomans was producer, scriptwriter, director, photographer and editor of this film:
P.A. Yeomans (Producer) (1965). Keyline in New Caledonia: Operation ‘Flood-Flow’. Sydney, NSW: Keyline Production.

Copyright Release: P A Yeomans (16 Feb 1983)

Thanks go to Geoff Booth for telecine transferring this film to Betamax tape and later transferring this tape to VHS tape and then finally converting the second tape to a digitized video.

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