网页Contour bunds are narrow-base trapezoidal embankments constructed along contours (Fig. 5.1). These bunds divide the area into strips that act as barriers to runoff and store water on their upslope side. Consequently, the flow rate and flow volume are reduced, leading to decreased soil erosion and enhanced soil infiltration and groundwater recharge.
5. Water harvesting techniques - Food and Agriculture Organization
网页Trapezoidal bunds are used to enclose larger areas (up to 1 ha) and to impound larger quantities of runoff which is harvested from an external or "long slope" catchment. The name is derived from the layout of the structure which has the form of a trapezoid -a base bund connected to two side bunds or wingwalls which extend upslope at an angle of ...
Bunds - SpringerLink
网页2023年2月1日 · Contour bunds are narrow-base trapezoidal embankments constructed along contours (Fig. 5.1). These bunds divide the area into strips that act as barriers to runoff and store water on their upslope side.
Large semi-circular or trapezoidal bunds • Integrated Water …
网页Large semi-circular or trapezoidal bunds consist of earthen bunds facing up the slope and are built in long staggered rows. These structures harvest runoff water from external catchments upslope and are used for annual and perennial crops as well as pastures.
Runoff Farming - SpringerLink
网页2015年12月9日 · Bunds. 1 Introduction. This chapter is intended to provide technicians and extension workers with systematic introduction on the application of run-off farming technologies in agriculture production. The focus of this section is on simple, field scale systems for improved production of crops, trees and rangeland species in …
1. Introduction - Food and Agriculture Organization
网页Trapezoidal shaped earth bunds capturing runoff from external catchment and overflowing around wingtips Widely suitable (in a variety of designs) for crop production in arid and semi-arid areas Labour-intensive and uneven depth of runoff within plot.
Water Pans and Trapezoidal Bunds: Life-Changing Tools in Kenya
网页2012年3月28日 · A Trapezoidal Bund consists of long ridges (bunds) of earth constructed on a hill in the shape of a trapezoid. The rain flowing down the hill is channeled and caught by these...
Trapezoidal Bunds - TheWaterChannel
网页Trapezoidal bunds are efficient water harvesting structures for crop production in the arid and semi-arid lands with annual rainfall between 200 and 500 millimetres. Trapezoidal bunds are used to enclose large areas of up to 2 hectares in order to impound water for crop production. They are derived from enclosing 3 sides of a plot while the ...
Engineering Measures: Water Harvesting | 8 | Semiarid Soil and …
网页Imprint CRC Press. Pages 9. eBook ISBN 9781351076586. ABSTRACT. This chapter deals with water harvesting techniques for irrigation purposes, and only short-term storage facilities. Water harvesting is the collection of runoff and its use for the irrigation of crops, pastures, and trees, and for domestic and livestock consumption.
5. WATER CONSERVATION - Food and Agriculture Organization
网页The large number of separate semi- circular or trapezoidal bunds spreads the risk of damage from overflow in exceptionally heavy rain, or if one bund fails. The semi-circles are usually constructed by hand, and are larger versions of range pitting which is used to promote vegetation on grazing land (see Section 7.1 and Plates 7.5 and 7.6).
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