A first step in drawing up soil conservation guidelines was to measure water run-off and sediment content in different management systems. Today there is also emphasis on measuring the phosphorus and nitrogen content of the runoff water. This is a site for measuring run-off flow from a farmed catchment. The height of the water flowing through the V notch weir is automatically recorded by equipment in the small hut. Samples are also periodically taken for measurement of water quality. Measurements of surface run-off can also be made using small run-off plots.
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Photograph by Allan Gillingham
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