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|Storage:||The size of this resource is 3.7 MB|
|Created:||Aug 14, 2016 at 4:41 p.m.|
|Last updated:|| Aug 19, 2016 at 5:10 p.m.
|Citation:||See how to cite this resource|
|Content types:||Geographic Feature Content|
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Compressed GIS files used in PhaseIIITask4 to create ditch and tile drain layers.
Spatial data files specifying the areas with ditch and tile drainage were developed in 2004 by the USDA, Natural Resources Conservation Service (NRCS; Resource Conservationist, John Gillies, and Agricultural Engineer, Dean Renner). Drainage coefficients from NRCS technical guides are shown in Table 2. The drained areas were estimated using a geographic information system (GIS) to identify hydric soils on agricultural land use areas, based on the assumption that if a hydric soil was cleared and in agricultural use, then there was a drainage system in place to manage water using sub-surface (tile) and surface (open ditch) practices. For the Lower Nooksack Water Budget these are areas used to determine the tile drained and ditch drained fraction of each drainage model element as well as to assign drainage coefficients.
This resource is a subset of the LNWB Ch09 Artificial Drainage Collection Resource.
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|Title||Owners||Sharing Status||My Permission|
|LNWB Ch09 Artificial Drainage||Christina Norton · Jimmy Phuong||Public & Shareable||Open Access|
This resource was created using funding from the following sources:
|Agency Name||Award Title||Award Number|
|WRIA 1 Joint Board||Lower Nooksack Water Budget||Whatcom County Contract 201111021|
People or Organizations that contributed technically, materially, financially, or provided general support for the creation of the resource's content but are not considered authors.
|John Gillies||USDA, Natural Resources Conservation Service|
|Dean Renner||USDA, Natural Resources Conservation Service|
|Mary Dumas||Dumas & Associates|
|Peter Gill||Whatcom County Public Works|
|Jeremy Freimund||Lummi Nation|
How to Cite
This resource is shared under the Creative Commons Attribution CC BY.http://creativecommons.org/licenses/by/4.0/