Details

Autor(en) / Beteiligte

• Azam, Shahid
• Khan, Fawad

Titel

Geohydrological properties of selected badland sediments in Saskatchewan, Canada

Ist Teil von

• Bulletin of engineering geology and the environment, 2014-05, Vol.73 (2), p.389-399

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2014

Quelle

SpringerNature Journals

Beschreibungen/Notizen

• Geological and seasonal weather variations govern the geohydrological properties of the Avonlea badlands in Saskatchewan, Canada. Three surface sediments exhibiting distinct lithologic variations were found: a steeply sloped and fissured sandstone; a mildly sloped and popcorn-textured mudrock; and a flat and eroded pediment. The fines content increased from the dry to the wet state, with contents of 17–33 % seen for sandstone, 4–98 % for mudrock, and 21–42 % for pediment. The water adsorption capacity was found to be highest for mudrock ( w l  = 96 % and w p  = 47 %), followed by sandstone ( w l  = 39 % and w p  = 31 %), and then by pediment ( w l  = 31 % and w p  = 23 %). The soil water characteristic curves of sandstone and mudrock showed bimodal distributions with a low air entry value (6 and 9 kPa) pertaining to drainage through cracks and a high air entry value (160 and 92 kPa) associated with flow through the soil matrix. The pediment presented a unimodal soil water characteristic curve with a single matrix air entry value of 4 kPa. The saturated hydraulic conductivities for sandstone, mudrock, and pediment were measured as 8.5 × 10 −6 , 4.0 × 10 −8 , and 1.8 × 10 −5  m/s, respectively.