The purpose of the Agricltural Drainage Criteria is to provide good drainage for low land crops to survive and thrive, The survival of crops depends upon the crop's roots not being saturated for long periods of time. The criteria were designed to limit the duration that the crop's roots are subjected to saturaged soil conditions and provide a water table low enough to allow for good root growth.
The Agriculture Watercourse Maintenance Task Group was established by the Partnership Committee on Agriculture and Environment to develop an agricultural watercourse maintenance policy for British Columbia that considers the needs of both the agriculture and fishery resources.
In some parts of British Columbia, high levels of precipitation and seasonal runoff can cause saturation of agricultural soils. Most agricultural crops are adversely affected by ponded water on the soil surface and/or prolonged soil saturation in the root zone.
Stormwater runoff is a contributor to flooding and water quality degradation, particularly in areas that receive frequent and severe rainstorms or heavy snowfalls that produce large quantities of surface runoff.
Thousands of British Columbians are taking part in small, local projects to help rehabilitate streams and, together with hatchery and restocking programs, the results are encouraging. And BC farmers are no different.
The Drainage Management Guide is is one of the supplementary documents to the Environmental Farm Planning program prepared to assist British Columbia farmers and ranchers to improve their farm operations and implement beneficial management practices.
This manual is intended as a general reference although specific drainage design criteria are included. It describes generally accepted drainage practices and principles, yet is not meant to be the sole source of information on soil and water management
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