Four ponded depressional areas were selected in a cultivated field near Ste-Agnes de Dundee, Quebec. In 1988, land, soil, water and crop parameters were measured under ponding and non-ponding conditions in order to formalate a drainage investigation procedure for ponded depressions. / A sweet corn yield reduction of 39% was measured in depressions compared to ridges; this yield reduction occurred with 3 to 5 year interval of recurrence rainfalls. Loss of yield in depressional areas gave an overall reduction of 5% for the whole field. There was an additional loss in quality from poor uniformity of the corn cobs. The Ste-Agnes corn yield was estimated at 20% of the regional average. There was no significant difference between soil characteristics in depressions and ridges except for hydraulic characteristics such as infiltration and percolation rates as determined with the infiltrometer, and hydraulic conductivity as determined with the auger hole method. / The ponding runoff coefficients (mean PRC = 0.11) measured during the summer of 1988 were similar to the ones (mean PRC = 0.13) calculated using the CN curve method (USDA, SCS). / The low percolation rate of the subplow layer was found to be the main constraint to the subsurface drainage of the ponded depressions. / Soil survey and ponding study results were used to formulate a drainage investigation procedure for ponded depressional areas in the St. Lawrence Lowlands.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.39303 |
| Date | January 1992 |
| Creators | Sylvestre, Gilbert J. |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Doctor of Philosophy (Department of Agricultural Engineering.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001287143, proquestno: NN74611, Theses scanned by UMI/ProQuest. |
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