If the total basin area is 1000 m 2 and the width is 25 m the maximum basin length is 1000 25 40 m. Layout for basin irrigation systems can be either of the two arrangement fig 2 it is desirable that the long axis of basin be perpendicular to supply channels.
Tailwater is prevented from exiting the field and the slopes are usually very small or zero.
Basin irrigation layout. Contour basin irrigation layouts are used in australia for sequential cultivation of rice and other cropsonsoilswithlowinﬁltrationrates multipleinterconnectedbasinsthroughgatesinstalledinthe check banks and backﬂow at the inlet end are unique features of contour basin layouts used in southeast australia. From table 1 the maximum basin or terrace width for a slope of 1 is 25 m range 15 25 m. Check basin irrigation is suited for smooth gentle and uniform land slopes and for soils having moderate to low infiltration rates.
This maximizes the spacing between supply lines channels. If a field is level in all directions is encompassed by a dyke to prevent runoff and provides an undirected flow of water onto the field it is herein called a basin. Recession and depletion are accomplished at nearly the same time and nearly uniform over the entire basin.
Crc for irrigation futures i improving the performance of basin irrigation layouts in the southern murray darling basin sam north1 2 don griffin1 2 michael grabham1 2 3 and malcolm gillies1 4 1crc if. Basin irrigation is the most common form of surface irrigation particularly in regions with layouts of small fields. Basin irrigation design is somewhat simpler than either furrow or border design.
Drains are some times placed at the ends of basins midway between the sup. From table 2 the maximum basin size for a clay loam soil and an available stream size of 25 l sec is 1000 m 2. Both row crops and close growing crops are adopted to be used with basins as long as the crop is not affected by temporary inundation or is planted in raised beds so that it will remain above the water level.
Steep slopes require complex layouts and heavy land levelling.