Laserfiche WebLink
Subirrigation <br />• A reconnaissance study of vegetation failed to identify areas of Subirrigation <br />in the nonalluvial areas. <br />In the alluvial areas much of the stream bottom is tree covered with the typi- <br />cally associated shrubs and grasses. Most likely, this vegetation receives <br />water from the stream through the coarse sediments, but there are no large <br />expanses of subirrigated land which could be cultivated. Much of the fan <br />deposit at the mouth of the creek receives water from flood-irrigation rather <br />than Subirrigation. <br />SIGNIFICANCE OF THE AVF <br />Since the Thompson Creek drainage is, for the most part, a perennial stream and <br />the cummulative size of the alluvial areas fit AVF size criteria, it is assumed <br />that CMLRB will conclude that these areas are AVF's. However, certain <br />characteristics of these alluvial areas reduce their significance as AVF's. The <br />following observations should he considered in any determination of the signifi- <br />cance of these alluvial areas, but do not include the obvious alluvial area at <br />the mouth of Thompson Creek. <br />1) Nature of the alluvial material (coarseness of the material-grades <br />upward to cobbles and boulders). <br />2) Limited continous arable soil in the alluvial areas. <br />3) Limited water availability for flood-irrigation. <br />4) No evidence of flood-irrigation in the alluvial areas. <br />• <br />5-11 <br />