. Agri-news. Agriculture. 2 Water runs uphill Large volumes of groundwater and dissolved salts are pulled uphill from water bodies and cause extensive saline rings at the edges, says Sanjay Kumar, a contract researcher with Alberta Agriculture, Food and Rural Development, and Agriculture and Agri-Food Canada. 'The volumes of water and salt are considerably larger than expected," said Kumar. "The volumes are large because the flow of groundwater is mainly through the upper soil which has very large conducting ; Research carried out through a salinity project, sponsored by C
. Agri-news. Agriculture. 2 Water runs uphill Large volumes of groundwater and dissolved salts are pulled uphill from water bodies and cause extensive saline rings at the edges, says Sanjay Kumar, a contract researcher with Alberta Agriculture, Food and Rural Development, and Agriculture and Agri-Food Canada. 'The volumes of water and salt are considerably larger than expected," said Kumar. "The volumes are large because the flow of groundwater is mainly through the upper soil which has very large conducting ; Research carried out through a salinity project, sponsored by Canada - Alberta Environmentally Sustainable Agriculture Agreement (CAESA) provides evidence that sizeable amounts of water move laterally uphill from sloughs and wet spots, at very shallow depths. Kumar explained that two types of ground water flow cause salinity. One flow moves uphill, shallow and parallel to the surface. It is most prominent around sloughs, ponds and wet spots. The other, better known, flow is deep through subsoil and bedrock and usually moves downhill due to gravity. (See Figure 1.). subsoil Figure I. Typical mechanisms olslough ring and sidehill saline seeps. "What we are finding, through modelling, is that the shallow uphill flows around water bodies with no vegetation at the edges, are much more important than previously thought. This phenomena is common in fields which are worked, in particular summerfallowed, right up to the edge of the water," said Kumar. "Because the groundwater flow in the slough ring type of saline seep is very shallow, more alternatives to control the problem may be available and at a lower cost," says Hank VanderPluym, Alberta Agriculture's conservation section head. He indicates that even shallow vegetative or mechanical controls may be successful in stemming the flow of groundwater. "Controls may include forage, trees and annuals," said VanderPluym. Potential control measures will be evaluated as pa
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