Name: DrainageManagementAreas

Display Field: unq_BMP_ID

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: Other processes such as denitrification may be enhanced but this has not yet been confirmed by research. Several published studies have evaluated tile discharge and nutrient loads under drainage water management systems (e.g., Williams et al., 2015). The water table is controlled through the use of gate structures that are adjusted at different times during the year. When field access is needed for planting, harvest or other operations, the gate can be opened fully to allow unrestricted drainage. When the gate is used to raise water table levels in the midst of the growing season, this may allow more plant water uptake during dry periods, which can increase crop yields. Crop grain yield increases have been documented with controlled drainage and this has primarily been attributed to the increased availability of soil water (Delbecq et al., 2012). Controlled drainage may be used on fields with flat topography (typically one percent or less slope), such as in flood plains and on flat fields typical of the large areas of the glaciated Midwest. The practice can be expensive to design and install in areas with slopes steeper than about one percent because of the number of control structures required in a typical field. A single control gate (depending on its design) can influence the water table in an area of a field that has about a 0.5 meter change in elevation. To identify fields potentially suited to this practice, the Drainage Water Management tool identifies all areas within tile-drained, agricultural fields where a contour interval between 0.3 and 1.5 m (chosen by the user), comprises more than a minimum acreage or a minimum user-defined percentage of the field (must be at least 30% of the field).

Copyright Text: Analyst: ahyams

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Supported query Formats: JSON, geoJSON, PBF

Use Standardized Queries: True

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Templates:

Name: DrainageManagementAreas
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:

Attributes:

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Supports Rollback On Failure Parameter: true

Last Edit Date: 3/19/2024 8:27:34 PM

Schema Last Edit Date: 3/19/2024 8:27:34 PM

Data Last Edit Date: 3/19/2024 8:27:34 PM

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